CbC/CbC_gcc: gcc/tree-ssa-uninit.c annotate

annotate gcc/tree-ssa-uninit.c @ 67:f6334be47118

update gcc from gcc-4.6-20100522 to gcc-4.6-20110318

author	nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date	Tue, 22 Mar 2011 17:18:12 +0900
parents	b7f97abdc517
children	04ced10e8804

rev	line source
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1 /* Predicate aware uninitialized variable warning.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2010 Free Software
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	3 Foundation, Inc.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	4 Contributed by Xinliang David Li <davidxl@google.com>
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	5
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	6 This file is part of GCC.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	7
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	8 GCC is free software; you can redistribute it and/or modify
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	9 it under the terms of the GNU General Public License as published by
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	10 the Free Software Foundation; either version 3, or (at your option)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	11 any later version.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	12
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	13 GCC is distributed in the hope that it will be useful,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	14 but WITHOUT ANY WARRANTY; without even the implied warranty of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	16 GNU General Public License for more details.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	17
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	18 You should have received a copy of the GNU General Public License
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	19 along with GCC; see the file COPYING3. If not see
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	20 <http://www.gnu.org/licenses/>. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	21
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	22 #include "config.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	23 #include "system.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	24 #include "coretypes.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	25 #include "tm.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	26 #include "tree.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	27 #include "flags.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	28 #include "tm_p.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	29 #include "langhooks.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	30 #include "basic-block.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	31 #include "output.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	32 #include "function.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	33 #include "gimple-pretty-print.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	34 #include "bitmap.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	35 #include "pointer-set.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	36 #include "tree-flow.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	37 #include "gimple.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	38 #include "tree-inline.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	39 #include "timevar.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	40 #include "hashtab.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	41 #include "tree-dump.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	42 #include "tree-pass.h"
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	43 #include "diagnostic-core.h"
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	44 #include "timevar.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	45
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	46 /* This implements the pass that does predicate aware warning on uses of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	47 possibly uninitialized variables. The pass first collects the set of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	48 possibly uninitialized SSA names. For each such name, it walks through
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	49 all its immediate uses. For each immediate use, it rebuilds the condition
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	50 expression (the predicate) that guards the use. The predicate is then
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	51 examined to see if the variable is always defined under that same condition.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	52 This is done either by pruning the unrealizable paths that lead to the
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	53 default definitions or by checking if the predicate set that guards the
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	54 defining paths is a superset of the use predicate. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	55
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	56
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	57 /* Pointer set of potentially undefined ssa names, i.e.,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	58 ssa names that are defined by phi with operands that
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	59 are not defined or potentially undefined. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	60 static struct pointer_set_t *possibly_undefined_names = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	61
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	62 /* Bit mask handling macros. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	63 #define MASK_SET_BIT(mask, pos) mask \|= (1 << pos)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	64 #define MASK_TEST_BIT(mask, pos) (mask & (1 << pos))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	65 #define MASK_EMPTY(mask) (mask == 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	66
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	67 /* Returns the first bit position (starting from LSB)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	68 in mask that is non zero. Returns -1 if the mask is empty. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	69 static int
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	70 get_mask_first_set_bit (unsigned mask)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	71 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	72 int pos = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	73 if (mask == 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	74 return -1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	75
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	76 while ((mask & (1 << pos)) == 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	77 pos++;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	78
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	79 return pos;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	80 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	81 #define MASK_FIRST_SET_BIT(mask) get_mask_first_set_bit (mask)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	82
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	83
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	84 /* Return true if T, an SSA_NAME, has an undefined value. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	85
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	86 bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	87 ssa_undefined_value_p (tree t)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	88 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	89 tree var = SSA_NAME_VAR (t);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	90
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	91 /* Parameters get their initial value from the function entry. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	92 if (TREE_CODE (var) == PARM_DECL)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	93 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	94
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	95 /* When returning by reference the return address is actually a hidden
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	96 parameter. */
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	97 if (TREE_CODE (SSA_NAME_VAR (t)) == RESULT_DECL
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	98 && DECL_BY_REFERENCE (SSA_NAME_VAR (t)))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	99 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	100
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	101 /* Hard register variables get their initial value from the ether. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	102 if (TREE_CODE (var) == VAR_DECL && DECL_HARD_REGISTER (var))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	103 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	104
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	105 /* The value is undefined iff its definition statement is empty. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	106 return (gimple_nop_p (SSA_NAME_DEF_STMT (t))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	107 \|\| (possibly_undefined_names
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	108 && pointer_set_contains (possibly_undefined_names, t)));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	109 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	110
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	111 /* Checks if the operand OPND of PHI is defined by
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	112 another phi with one operand defined by this PHI,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	113 but the rest operands are all defined. If yes,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	114 returns true to skip this this operand as being
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	115 redundant. Can be enhanced to be more general. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	116
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	117 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	118 can_skip_redundant_opnd (tree opnd, gimple phi)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	119 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	120 gimple op_def;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	121 tree phi_def;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	122 int i, n;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	123
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	124 phi_def = gimple_phi_result (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	125 op_def = SSA_NAME_DEF_STMT (opnd);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	126 if (gimple_code (op_def) != GIMPLE_PHI)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	127 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	128 n = gimple_phi_num_args (op_def);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	129 for (i = 0; i < n; ++i)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	130 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	131 tree op = gimple_phi_arg_def (op_def, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	132 if (TREE_CODE (op) != SSA_NAME)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	133 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	134 if (op != phi_def && ssa_undefined_value_p (op))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	135 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	136 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	137
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	138 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	139 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	140
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	141 /* Returns a bit mask holding the positions of arguments in PHI
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	142 that have empty (or possibly empty) definitions. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	143
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	144 static unsigned
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	145 compute_uninit_opnds_pos (gimple phi)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	146 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	147 size_t i, n;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	148 unsigned uninit_opnds = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	149
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	150 n = gimple_phi_num_args (phi);
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	151 /* Bail out for phi with too many args. */
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	152 if (n > 32)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	153 return 0;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	154
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	155 for (i = 0; i < n; ++i)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	156 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	157 tree op = gimple_phi_arg_def (phi, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	158 if (TREE_CODE (op) == SSA_NAME
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	159 && ssa_undefined_value_p (op)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	160 && !can_skip_redundant_opnd (op, phi))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	161 MASK_SET_BIT (uninit_opnds, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	162 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	163 return uninit_opnds;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	164 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	165
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	166 /* Find the immediate postdominator PDOM of the specified
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	167 basic block BLOCK. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	168
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	169 static inline basic_block
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	170 find_pdom (basic_block block)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	171 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	172 if (block == EXIT_BLOCK_PTR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	173 return EXIT_BLOCK_PTR;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	174 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	175 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	176 basic_block bb
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	177 = get_immediate_dominator (CDI_POST_DOMINATORS, block);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	178 if (! bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	179 return EXIT_BLOCK_PTR;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	180 return bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	181 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	182 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	183
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	184 /* Find the immediate DOM of the specified
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	185 basic block BLOCK. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	186
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	187 static inline basic_block
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	188 find_dom (basic_block block)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	189 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	190 if (block == ENTRY_BLOCK_PTR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	191 return ENTRY_BLOCK_PTR;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	192 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	193 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	194 basic_block bb = get_immediate_dominator (CDI_DOMINATORS, block);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	195 if (! bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	196 return ENTRY_BLOCK_PTR;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	197 return bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	198 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	199 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	200
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	201 /* Returns true if BB1 is postdominating BB2 and BB1 is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	202 not a loop exit bb. The loop exit bb check is simple and does
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	203 not cover all cases. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	204
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	205 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	206 is_non_loop_exit_postdominating (basic_block bb1, basic_block bb2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	207 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	208 if (!dominated_by_p (CDI_POST_DOMINATORS, bb2, bb1))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	209 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	210
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	211 if (single_pred_p (bb1) && !single_succ_p (bb2))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	212 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	213
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	214 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	215 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	216
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	217 /* Find the closest postdominator of a specified BB, which is control
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	218 equivalent to BB. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	219
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	220 static inline basic_block
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	221 find_control_equiv_block (basic_block bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	222 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	223 basic_block pdom;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	224
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	225 pdom = find_pdom (bb);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	226
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	227 /* Skip the postdominating bb that is also loop exit. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	228 if (!is_non_loop_exit_postdominating (pdom, bb))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	229 return NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	230
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	231 if (dominated_by_p (CDI_DOMINATORS, pdom, bb))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	232 return pdom;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	233
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	234 return NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	235 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	236
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	237 #define MAX_NUM_CHAINS 8
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	238 #define MAX_CHAIN_LEN 5
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	239
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	240 /* Computes the control dependence chains (paths of edges)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	241 for DEP_BB up to the dominating basic block BB (the head node of a
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	242 chain should be dominated by it). CD_CHAINS is pointer to a
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	243 dynamic array holding the result chains. CUR_CD_CHAIN is the current
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	244 chain being computed. *NUM_CHAINS is total number of chains. The
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	245 function returns true if the information is successfully computed,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	246 return false if there is no control dependence or not computed. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	247
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	248 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	249 compute_control_dep_chain (basic_block bb, basic_block dep_bb,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	250 VEC(edge, heap) **cd_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	251 size_t *num_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	252 VEC(edge, heap) **cur_cd_chain)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	253 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	254 edge_iterator ei;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	255 edge e;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	256 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	257 bool found_cd_chain = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	258 size_t cur_chain_len = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	259
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	260 if (EDGE_COUNT (bb->succs) < 2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	261 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	262
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	263 /* Could use a set instead. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	264 cur_chain_len = VEC_length (edge, *cur_cd_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	265 if (cur_chain_len > MAX_CHAIN_LEN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	266 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	267
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	268 for (i = 0; i < cur_chain_len; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	269 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	270 edge e = VEC_index (edge, *cur_cd_chain, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	271 /* cycle detected. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	272 if (e->src == bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	273 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	274 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	275
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	276 FOR_EACH_EDGE (e, ei, bb->succs)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	277 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	278 basic_block cd_bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	279 if (e->flags & (EDGE_FAKE \| EDGE_ABNORMAL))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	280 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	281
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	282 cd_bb = e->dest;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	283 VEC_safe_push (edge, heap, *cur_cd_chain, e);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	284 while (!is_non_loop_exit_postdominating (cd_bb, bb))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	285 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	286 if (cd_bb == dep_bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	287 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	288 /* Found a direct control dependence. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	289 if (*num_chains < MAX_NUM_CHAINS)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	290 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	291 cd_chains[*num_chains]
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	292 = VEC_copy (edge, heap, *cur_cd_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	293 (*num_chains)++;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	294 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	295 found_cd_chain = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	296 /* check path from next edge. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	297 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	298 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	299
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	300 /* Now check if DEP_BB is indirectly control dependent on BB. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	301 if (compute_control_dep_chain (cd_bb, dep_bb, cd_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	302 num_chains, cur_cd_chain))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	303 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	304 found_cd_chain = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	305 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	306 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	307
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	308 cd_bb = find_pdom (cd_bb);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	309 if (cd_bb == EXIT_BLOCK_PTR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	310 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	311 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	312 VEC_pop (edge, *cur_cd_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	313 gcc_assert (VEC_length (edge, *cur_cd_chain) == cur_chain_len);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	314 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	315 gcc_assert (VEC_length (edge, *cur_cd_chain) == cur_chain_len);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	316
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	317 return found_cd_chain;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	318 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	319
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	320 typedef struct use_pred_info
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	321 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	322 gimple cond;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	323 bool invert;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	324 } *use_pred_info_t;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	325
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	326 DEF_VEC_P(use_pred_info_t);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	327 DEF_VEC_ALLOC_P(use_pred_info_t, heap);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	328
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	329
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	330 /* Converts the chains of control dependence edges into a set of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	331 predicates. A control dependence chain is represented by a vector
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	332 edges. DEP_CHAINS points to an array of dependence chains.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	333 NUM_CHAINS is the size of the chain array. One edge in a dependence
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	334 chain is mapped to predicate expression represented by use_pred_info_t
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	335 type. One dependence chain is converted to a composite predicate that
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	336 is the result of AND operation of use_pred_info_t mapped to each edge.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	337 A composite predicate is presented by a vector of use_pred_info_t. On
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	338 return, *PREDS points to the resulting array of composite predicates.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	339 NUM_PREDS is the number of composite predictes. /
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	340
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	341 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	342 convert_control_dep_chain_into_preds (VEC(edge, heap) **dep_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	343 size_t num_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	344 VEC(use_pred_info_t, heap) ***preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	345 size_t *num_preds)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	346 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	347 bool has_valid_pred = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	348 size_t i, j;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	349 if (num_chains == 0 \|\| num_chains >= MAX_NUM_CHAINS)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	350 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	351
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	352 /* Now convert CD chains into predicates */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	353 has_valid_pred = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	354
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	355 /* Now convert the control dep chain into a set
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	356 of predicates. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	357 preds = XCNEWVEC (VEC(use_pred_info_t, heap) ,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	358 num_chains);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	359 *num_preds = num_chains;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	360
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	361 for (i = 0; i < num_chains; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	362 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	363 VEC(edge, heap) *one_cd_chain = dep_chains[i];
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	364 for (j = 0; j < VEC_length (edge, one_cd_chain); j++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	365 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	366 gimple cond_stmt;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	367 gimple_stmt_iterator gsi;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	368 basic_block guard_bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	369 use_pred_info_t one_pred;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	370 edge e;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	371
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	372 e = VEC_index (edge, one_cd_chain, j);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	373 guard_bb = e->src;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	374 gsi = gsi_last_bb (guard_bb);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	375 if (gsi_end_p (gsi))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	376 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	377 has_valid_pred = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	378 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	379 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	380 cond_stmt = gsi_stmt (gsi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	381 if (gimple_code (cond_stmt) == GIMPLE_CALL
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	382 && EDGE_COUNT (e->src->succs) >= 2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	383 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	384 /* Ignore EH edge. Can add assertion
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	385 on the other edge's flag. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	386 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	387 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	388 /* Skip if there is essentially one succesor. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	389 if (EDGE_COUNT (e->src->succs) == 2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	390 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	391 edge e1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	392 edge_iterator ei1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	393 bool skip = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	394
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	395 FOR_EACH_EDGE (e1, ei1, e->src->succs)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	396 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	397 if (EDGE_COUNT (e1->dest->succs) == 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	398 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	399 skip = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	400 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	401 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	402 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	403 if (skip)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	404 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	405 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	406 if (gimple_code (cond_stmt) != GIMPLE_COND)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	407 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	408 has_valid_pred = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	409 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	410 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	411 one_pred = XNEW (struct use_pred_info);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	412 one_pred->cond = cond_stmt;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	413 one_pred->invert = !!(e->flags & EDGE_FALSE_VALUE);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	414 VEC_safe_push (use_pred_info_t, heap, (*preds)[i], one_pred);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	415 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	416
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	417 if (!has_valid_pred)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	418 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	419 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	420 return has_valid_pred;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	421 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	422
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	423 /* Computes all control dependence chains for USE_BB. The control
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	424 dependence chains are then converted to an array of composite
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	425 predicates pointed to by PREDS. PHI_BB is the basic block of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	426 the phi whose result is used in USE_BB. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	427
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	428 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	429 find_predicates (VEC(use_pred_info_t, heap) ***preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	430 size_t *num_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	431 basic_block phi_bb,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	432 basic_block use_bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	433 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	434 size_t num_chains = 0, i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	435 VEC(edge, heap) **dep_chains = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	436 VEC(edge, heap) *cur_chain = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	437 bool has_valid_pred = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	438 basic_block cd_root = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	439
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	440 dep_chains = XCNEWVEC (VEC(edge, heap) *, MAX_NUM_CHAINS);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	441
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	442 /* First find the closest bb that is control equivalent to PHI_BB
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	443 that also dominates USE_BB. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	444 cd_root = phi_bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	445 while (dominated_by_p (CDI_DOMINATORS, use_bb, cd_root))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	446 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	447 basic_block ctrl_eq_bb = find_control_equiv_block (cd_root);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	448 if (ctrl_eq_bb && dominated_by_p (CDI_DOMINATORS, use_bb, ctrl_eq_bb))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	449 cd_root = ctrl_eq_bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	450 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	451 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	452 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	453
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	454 compute_control_dep_chain (cd_root, use_bb,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	455 dep_chains, &num_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	456 &cur_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	457
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	458 has_valid_pred
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	459 = convert_control_dep_chain_into_preds (dep_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	460 num_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	461 preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	462 num_preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	463 /* Free individual chain */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	464 VEC_free (edge, heap, cur_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	465 for (i = 0; i < num_chains; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	466 VEC_free (edge, heap, dep_chains[i]);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	467 free (dep_chains);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	468 return has_valid_pred;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	469 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	470
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	471 /* Computes the set of incoming edges of PHI that have non empty
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	472 definitions of a phi chain. The collection will be done
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	473 recursively on operands that are defined by phis. CD_ROOT
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	474 is the control dependence root. *EDGES holds the result, and
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	475 VISITED_PHIS is a pointer set for detecting cycles. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	476
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	477 static void
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	478 collect_phi_def_edges (gimple phi, basic_block cd_root,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	479 VEC(edge, heap) **edges,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	480 struct pointer_set_t *visited_phis)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	481 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	482 size_t i, n;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	483 edge opnd_edge;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	484 tree opnd;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	485
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	486 if (pointer_set_insert (visited_phis, phi))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	487 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	488
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	489 n = gimple_phi_num_args (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	490 for (i = 0; i < n; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	491 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	492 opnd_edge = gimple_phi_arg_edge (phi, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	493 opnd = gimple_phi_arg_def (phi, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	494
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	495 if (TREE_CODE (opnd) != SSA_NAME)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	496 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	497 if (dump_file && (dump_flags & TDF_DETAILS))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	498 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	499 fprintf (dump_file, "\n[CHECK] Found def edge %d in ", (int)i);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	500 print_gimple_stmt (dump_file, phi, 0, 0);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	501 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	502 VEC_safe_push (edge, heap, *edges, opnd_edge);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	503 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	504 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	505 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	506 gimple def = SSA_NAME_DEF_STMT (opnd);
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	507
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	508 if (gimple_code (def) == GIMPLE_PHI
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	509 && dominated_by_p (CDI_DOMINATORS,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	510 gimple_bb (def), cd_root))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	511 collect_phi_def_edges (def, cd_root, edges,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	512 visited_phis);
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	513 else if (!ssa_undefined_value_p (opnd))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	514 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	515 if (dump_file && (dump_flags & TDF_DETAILS))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	516 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	517 fprintf (dump_file, "\n[CHECK] Found def edge %d in ", (int)i);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	518 print_gimple_stmt (dump_file, phi, 0, 0);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	519 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	520 VEC_safe_push (edge, heap, *edges, opnd_edge);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	521 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	522 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	523 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	524 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	525
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	526 /* For each use edge of PHI, computes all control dependence chains.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	527 The control dependence chains are then converted to an array of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	528 composite predicates pointed to by PREDS. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	529
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	530 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	531 find_def_preds (VEC(use_pred_info_t, heap) ***preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	532 size_t *num_preds, gimple phi)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	533 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	534 size_t num_chains = 0, i, n;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	535 VEC(edge, heap) **dep_chains = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	536 VEC(edge, heap) *cur_chain = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	537 VEC(edge, heap) *def_edges = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	538 bool has_valid_pred = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	539 basic_block phi_bb, cd_root = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	540 struct pointer_set_t *visited_phis;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	541
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	542 dep_chains = XCNEWVEC (VEC(edge, heap) *, MAX_NUM_CHAINS);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	543
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	544 phi_bb = gimple_bb (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	545 /* First find the closest dominating bb to be
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	546 the control dependence root */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	547 cd_root = find_dom (phi_bb);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	548 if (!cd_root)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	549 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	550
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	551 visited_phis = pointer_set_create ();
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	552 collect_phi_def_edges (phi, cd_root, &def_edges, visited_phis);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	553 pointer_set_destroy (visited_phis);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	554
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	555 n = VEC_length (edge, def_edges);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	556 if (n == 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	557 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	558
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	559 for (i = 0; i < n; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	560 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	561 size_t prev_nc, j;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	562 edge opnd_edge;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	563
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	564 opnd_edge = VEC_index (edge, def_edges, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	565 prev_nc = num_chains;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	566 compute_control_dep_chain (cd_root, opnd_edge->src,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	567 dep_chains, &num_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	568 &cur_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	569 /* Free individual chain */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	570 VEC_free (edge, heap, cur_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	571 cur_chain = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	572
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	573 /* Now update the newly added chains with
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	574 the phi operand edge: */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	575 if (EDGE_COUNT (opnd_edge->src->succs) > 1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	576 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	577 if (prev_nc == num_chains
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	578 && num_chains < MAX_NUM_CHAINS)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	579 num_chains++;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	580 for (j = prev_nc; j < num_chains; j++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	581 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	582 VEC_safe_push (edge, heap, dep_chains[j], opnd_edge);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	583 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	584 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	585 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	586
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	587 has_valid_pred
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	588 = convert_control_dep_chain_into_preds (dep_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	589 num_chains,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	590 preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	591 num_preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	592 for (i = 0; i < num_chains; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	593 VEC_free (edge, heap, dep_chains[i]);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	594 free (dep_chains);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	595 return has_valid_pred;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	596 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	597
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	598 /* Dumps the predicates (PREDS) for USESTMT. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	599
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	600 static void
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	601 dump_predicates (gimple usestmt, size_t num_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	602 VEC(use_pred_info_t, heap) **preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	603 const char* msg)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	604 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	605 size_t i, j;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	606 VEC(use_pred_info_t, heap) *one_pred_chain;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	607 fprintf (dump_file, msg);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	608 print_gimple_stmt (dump_file, usestmt, 0, 0);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	609 fprintf (dump_file, "is guarded by :\n");
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	610 /* do some dumping here: */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	611 for (i = 0; i < num_preds; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	612 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	613 size_t np;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	614
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	615 one_pred_chain = preds[i];
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	616 np = VEC_length (use_pred_info_t, one_pred_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	617
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	618 for (j = 0; j < np; j++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	619 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	620 use_pred_info_t one_pred
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	621 = VEC_index (use_pred_info_t, one_pred_chain, j);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	622 if (one_pred->invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	623 fprintf (dump_file, " (.NOT.) ");
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	624 print_gimple_stmt (dump_file, one_pred->cond, 0, 0);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	625 if (j < np - 1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	626 fprintf (dump_file, "(.AND.)\n");
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	627 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	628 if (i < num_preds - 1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	629 fprintf (dump_file, "(.OR.)\n");
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	630 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	631 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	632
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	633 /* Destroys the predicate set PREDS. /
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	634
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	635 static void
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	636 destroy_predicate_vecs (size_t n,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	637 VEC(use_pred_info_t, heap) ** preds)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	638 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	639 size_t i, j;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	640 for (i = 0; i < n; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	641 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	642 for (j = 0; j < VEC_length (use_pred_info_t, preds[i]); j++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	643 free (VEC_index (use_pred_info_t, preds[i], j));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	644 VEC_free (use_pred_info_t, heap, preds[i]);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	645 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	646 free (preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	647 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	648
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	649
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	650 /* Computes the 'normalized' conditional code with operand
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	651 swapping and condition inversion. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	652
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	653 static enum tree_code
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	654 get_cmp_code (enum tree_code orig_cmp_code,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	655 bool swap_cond, bool invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	656 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	657 enum tree_code tc = orig_cmp_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	658
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	659 if (swap_cond)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	660 tc = swap_tree_comparison (orig_cmp_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	661 if (invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	662 tc = invert_tree_comparison (tc, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	663
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	664 switch (tc)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	665 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	666 case LT_EXPR:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	667 case LE_EXPR:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	668 case GT_EXPR:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	669 case GE_EXPR:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	670 case EQ_EXPR:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	671 case NE_EXPR:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	672 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	673 default:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	674 return ERROR_MARK;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	675 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	676 return tc;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	677 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	678
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	679 /* Returns true if VAL falls in the range defined by BOUNDARY and CMPC, i.e.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	680 all values in the range satisfies (x CMPC BOUNDARY) == true. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	681
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	682 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	683 is_value_included_in (tree val, tree boundary, enum tree_code cmpc)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	684 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	685 bool inverted = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	686 bool is_unsigned;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	687 bool result;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	688
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	689 /* Only handle integer constant here. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	690 if (TREE_CODE (val) != INTEGER_CST
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	691 \|\| TREE_CODE (boundary) != INTEGER_CST)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	692 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	693
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	694 is_unsigned = TYPE_UNSIGNED (TREE_TYPE (val));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	695
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	696 if (cmpc == GE_EXPR \|\| cmpc == GT_EXPR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	697 \|\| cmpc == NE_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	698 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	699 cmpc = invert_tree_comparison (cmpc, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	700 inverted = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	701 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	702
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	703 if (is_unsigned)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	704 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	705 if (cmpc == EQ_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	706 result = tree_int_cst_equal (val, boundary);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	707 else if (cmpc == LT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	708 result = INT_CST_LT_UNSIGNED (val, boundary);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	709 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	710 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	711 gcc_assert (cmpc == LE_EXPR);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	712 result = (tree_int_cst_equal (val, boundary)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	713 \|\| INT_CST_LT_UNSIGNED (val, boundary));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	714 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	715 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	716 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	717 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	718 if (cmpc == EQ_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	719 result = tree_int_cst_equal (val, boundary);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	720 else if (cmpc == LT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	721 result = INT_CST_LT (val, boundary);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	722 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	723 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	724 gcc_assert (cmpc == LE_EXPR);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	725 result = (tree_int_cst_equal (val, boundary)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	726 \|\| INT_CST_LT (val, boundary));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	727 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	728 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	729
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	730 if (inverted)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	731 result ^= 1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	732
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	733 return result;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	734 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	735
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	736 /* Returns true if PRED is common among all the predicate
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	737 chains (PREDS) (and therefore can be factored out).
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	738 NUM_PRED_CHAIN is the size of array PREDS. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	739
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	740 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	741 find_matching_predicate_in_rest_chains (use_pred_info_t pred,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	742 VEC(use_pred_info_t, heap) **preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	743 size_t num_pred_chains)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	744 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	745 size_t i, j, n;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	746
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	747 /* trival case */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	748 if (num_pred_chains == 1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	749 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	750
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	751 for (i = 1; i < num_pred_chains; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	752 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	753 bool found = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	754 VEC(use_pred_info_t, heap) *one_chain = preds[i];
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	755 n = VEC_length (use_pred_info_t, one_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	756 for (j = 0; j < n; j++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	757 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	758 use_pred_info_t pred2
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	759 = VEC_index (use_pred_info_t, one_chain, j);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	760 /* can relax the condition comparison to not
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	761 use address comparison. However, the most common
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	762 case is that multiple control dependent paths share
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	763 a common path prefix, so address comparison should
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	764 be ok. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	765
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	766 if (pred2->cond == pred->cond
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	767 && pred2->invert == pred->invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	768 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	769 found = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	770 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	771 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	772 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	773 if (!found)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	774 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	775 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	776 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	777 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	778
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	779 /* Forward declaration. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	780 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	781 is_use_properly_guarded (gimple use_stmt,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	782 basic_block use_bb,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	783 gimple phi,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	784 unsigned uninit_opnds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	785 struct pointer_set_t *visited_phis);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	786
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	787 /* Returns true if all uninitialized opnds are pruned. Returns false
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	788 otherwise. PHI is the phi node with uninitialized operands,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	789 UNINIT_OPNDS is the bitmap of the uninitialize operand positions,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	790 FLAG_DEF is the statement defining the flag guarding the use of the
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	791 PHI output, BOUNDARY_CST is the const value used in the predicate
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	792 associated with the flag, CMP_CODE is the comparison code used in
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	793 the predicate, VISITED_PHIS is the pointer set of phis visited, and
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	794 VISITED_FLAG_PHIS is the pointer to the pointer set of flag definitions
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	795 that are also phis.
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	796
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	797 Example scenario:
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	798
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	799 BB1:
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	800 flag_1 = phi <0, 1> // (1)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	801 var_1 = phi <undef, some_val>
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	802
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	803
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	804 BB2:
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	805 flag_2 = phi <0, flag_1, flag_1> // (2)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	806 var_2 = phi <undef, var_1, var_1>
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	807 if (flag_2 == 1)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	808 goto BB3;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	809
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	810 BB3:
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	811 use of var_2 // (3)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	812
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	813 Because some flag arg in (1) is not constant, if we do not look into the
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	814 flag phis recursively, it is conservatively treated as unknown and var_1
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	815 is thought to be flowed into use at (3). Since var_1 is potentially uninitialized
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	816 a false warning will be emitted. Checking recursively into (1), the compiler can
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	817 find out that only some_val (which is defined) can flow into (3) which is OK.
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	818
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	819 */
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	820
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	821 static bool
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	822 prune_uninit_phi_opnds_in_unrealizable_paths (
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	823 gimple phi, unsigned uninit_opnds,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	824 gimple flag_def, tree boundary_cst,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	825 enum tree_code cmp_code,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	826 struct pointer_set_t *visited_phis,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	827 bitmap *visited_flag_phis)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	828 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	829 unsigned i;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	830
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	831 for (i = 0; i < MIN (32, gimple_phi_num_args (flag_def)); i++)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	832 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	833 tree flag_arg;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	834
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	835 if (!MASK_TEST_BIT (uninit_opnds, i))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	836 continue;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	837
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	838 flag_arg = gimple_phi_arg_def (flag_def, i);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	839 if (!is_gimple_constant (flag_arg))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	840 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	841 gimple flag_arg_def, phi_arg_def;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	842 tree phi_arg;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	843 unsigned uninit_opnds_arg_phi;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	844
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	845 if (TREE_CODE (flag_arg) != SSA_NAME)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	846 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	847 flag_arg_def = SSA_NAME_DEF_STMT (flag_arg);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	848 if (gimple_code (flag_arg_def) != GIMPLE_PHI)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	849 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	850
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	851 phi_arg = gimple_phi_arg_def (phi, i);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	852 if (TREE_CODE (phi_arg) != SSA_NAME)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	853 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	854
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	855 phi_arg_def = SSA_NAME_DEF_STMT (phi_arg);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	856 if (gimple_code (phi_arg_def) != GIMPLE_PHI)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	857 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	858
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	859 if (gimple_bb (phi_arg_def) != gimple_bb (flag_arg_def))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	860 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	861
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	862 if (!*visited_flag_phis)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	863 *visited_flag_phis = BITMAP_ALLOC (NULL);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	864
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	865 if (bitmap_bit_p (*visited_flag_phis,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	866 SSA_NAME_VERSION (gimple_phi_result (flag_arg_def))))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	867 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	868
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	869 bitmap_set_bit (*visited_flag_phis,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	870 SSA_NAME_VERSION (gimple_phi_result (flag_arg_def)));
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	871
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	872 /* Now recursively prune the uninitialized phi args. */
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	873 uninit_opnds_arg_phi = compute_uninit_opnds_pos (phi_arg_def);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	874 if (!prune_uninit_phi_opnds_in_unrealizable_paths (
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	875 phi_arg_def, uninit_opnds_arg_phi,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	876 flag_arg_def, boundary_cst, cmp_code,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	877 visited_phis, visited_flag_phis))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	878 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	879
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	880 bitmap_clear_bit (*visited_flag_phis,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	881 SSA_NAME_VERSION (gimple_phi_result (flag_arg_def)));
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	882 continue;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	883 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	884
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	885 /* Now check if the constant is in the guarded range. */
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	886 if (is_value_included_in (flag_arg, boundary_cst, cmp_code))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	887 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	888 tree opnd;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	889 gimple opnd_def;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	890
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	891 /* Now that we know that this undefined edge is not
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	892 pruned. If the operand is defined by another phi,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	893 we can further prune the incoming edges of that
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	894 phi by checking the predicates of this operands. */
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	895
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	896 opnd = gimple_phi_arg_def (phi, i);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	897 opnd_def = SSA_NAME_DEF_STMT (opnd);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	898 if (gimple_code (opnd_def) == GIMPLE_PHI)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	899 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	900 edge opnd_edge;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	901 unsigned uninit_opnds2
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	902 = compute_uninit_opnds_pos (opnd_def);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	903 gcc_assert (!MASK_EMPTY (uninit_opnds2));
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	904 opnd_edge = gimple_phi_arg_edge (phi, i);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	905 if (!is_use_properly_guarded (phi,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	906 opnd_edge->src,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	907 opnd_def,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	908 uninit_opnds2,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	909 visited_phis))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	910 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	911 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	912 else
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	913 return false;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	914 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	915 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	916
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	917 return true;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	918 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	919
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	920 /* A helper function that determines if the predicate set
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	921 of the use is not overlapping with that of the uninit paths.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	922 The most common senario of guarded use is in Example 1:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	923 Example 1:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	924 if (some_cond)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	925 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	926 x = ...;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	927 flag = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	928 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	929
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	930 ... some code ...
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	931
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	932 if (flag)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	933 use (x);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	934
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	935 The real world examples are usually more complicated, but similar
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	936 and usually result from inlining:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	937
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	938 bool init_func (int * x)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	939 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	940 if (some_cond)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	941 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	942 *x = ..
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	943 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	944 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	945
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	946 void foo(..)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	947 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	948 int x;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	949
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	950 if (!init_func(&x))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	951 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	952
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	953 .. some_code ...
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	954 use (x);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	955 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	956
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	957 Another possible use scenario is in the following trivial example:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	958
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	959 Example 2:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	960 if (n > 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	961 x = 1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	962 ...
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	963 if (n > 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	964 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	965 if (m < 2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	966 .. = x;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	967 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	968
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	969 Predicate analysis needs to compute the composite predicate:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	970
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	971 1) 'x' use predicate: (n > 0) .AND. (m < 2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	972 2) 'x' default value (non-def) predicate: .NOT. (n > 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	973 (the predicate chain for phi operand defs can be computed
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	974 starting from a bb that is control equivalent to the phi's
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	975 bb and is dominating the operand def.)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	976
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	977 and check overlapping:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	978 (n > 0) .AND. (m < 2) .AND. (.NOT. (n > 0))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	979 <==> false
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	980
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	981 This implementation provides framework that can handle
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	982 scenarios. (Note that many simple cases are handled properly
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	983 without the predicate analysis -- this is due to jump threading
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	984 transformation which eliminates the merge point thus makes
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	985 path sensitive analysis unnecessary.)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	986
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	987 NUM_PREDS is the number is the number predicate chains, PREDS is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	988 the array of chains, PHI is the phi node whose incoming (undefined)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	989 paths need to be pruned, and UNINIT_OPNDS is the bitmap holding
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	990 uninit operand positions. VISITED_PHIS is the pointer set of phi
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	991 stmts being checked. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	992
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	993
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	994 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	995 use_pred_not_overlap_with_undef_path_pred (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	996 size_t num_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	997 VEC(use_pred_info_t, heap) **preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	998 gimple phi, unsigned uninit_opnds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	999 struct pointer_set_t *visited_phis)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1000 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1001 unsigned int i, n;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1002 gimple flag_def = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1003 tree boundary_cst = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1004 enum tree_code cmp_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1005 bool swap_cond = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1006 bool invert = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1007 VEC(use_pred_info_t, heap) *the_pred_chain;
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1008 bitmap visited_flag_phis = NULL;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1009 bool all_pruned = false;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1010
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1011 gcc_assert (num_preds > 0);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1012 /* Find within the common prefix of multiple predicate chains
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1013 a predicate that is a comparison of a flag variable against
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1014 a constant. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1015 the_pred_chain = preds[0];
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1016 n = VEC_length (use_pred_info_t, the_pred_chain);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1017 for (i = 0; i < n; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1018 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1019 gimple cond;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1020 tree cond_lhs, cond_rhs, flag = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1021
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1022 use_pred_info_t the_pred
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1023 = VEC_index (use_pred_info_t, the_pred_chain, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1024
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1025 cond = the_pred->cond;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1026 invert = the_pred->invert;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1027 cond_lhs = gimple_cond_lhs (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1028 cond_rhs = gimple_cond_rhs (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1029 cmp_code = gimple_cond_code (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1030
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1031 if (cond_lhs != NULL_TREE && TREE_CODE (cond_lhs) == SSA_NAME
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1032 && cond_rhs != NULL_TREE && is_gimple_constant (cond_rhs))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1033 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1034 boundary_cst = cond_rhs;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1035 flag = cond_lhs;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1036 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1037 else if (cond_rhs != NULL_TREE && TREE_CODE (cond_rhs) == SSA_NAME
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1038 && cond_lhs != NULL_TREE && is_gimple_constant (cond_lhs))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1039 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1040 boundary_cst = cond_lhs;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1041 flag = cond_rhs;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1042 swap_cond = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1043 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1044
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1045 if (!flag)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1046 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1047
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1048 flag_def = SSA_NAME_DEF_STMT (flag);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1049
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1050 if (!flag_def)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1051 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1052
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1053 if ((gimple_code (flag_def) == GIMPLE_PHI)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1054 && (gimple_bb (flag_def) == gimple_bb (phi))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1055 && find_matching_predicate_in_rest_chains (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1056 the_pred, preds, num_preds))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1057 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1058
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1059 flag_def = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1060 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1061
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1062 if (!flag_def)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1063 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1064
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1065 /* Now check all the uninit incoming edge has a constant flag value
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1066 that is in conflict with the use guard/predicate. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1067 cmp_code = get_cmp_code (cmp_code, swap_cond, invert);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1068
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1069 if (cmp_code == ERROR_MARK)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1070 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1071
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1072 all_pruned = prune_uninit_phi_opnds_in_unrealizable_paths (phi,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1073 uninit_opnds,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1074 flag_def,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1075 boundary_cst,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1076 cmp_code,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1077 visited_phis,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1078 &visited_flag_phis);
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1079
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1080 if (visited_flag_phis)
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1081 BITMAP_FREE (visited_flag_phis);
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1082
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1083 return all_pruned;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1084 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1085
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1086 /* Returns true if TC is AND or OR */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1087
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1088 static inline bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1089 is_and_or_or (enum tree_code tc, tree typ)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1090 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1091 return (tc == TRUTH_AND_EXPR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1092 \|\| tc == TRUTH_OR_EXPR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1093 \|\| tc == BIT_IOR_EXPR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1094 \|\| (tc == BIT_AND_EXPR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1095 && (typ == 0 \|\| TREE_CODE (typ) == BOOLEAN_TYPE)));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1096 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1097
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1098 typedef struct norm_cond
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1099 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1100 VEC(gimple, heap) *conds;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1101 enum tree_code cond_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1102 bool invert;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1103 } *norm_cond_t;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1104
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1105
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1106 /* Normalizes gimple condition COND. The normalization follows
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1107 UD chains to form larger condition expression trees. NORM_COND
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1108 holds the normalized result. COND_CODE is the logical opcode
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1109 (AND or OR) of the normalized tree. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1110
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1111 static void
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1112 normalize_cond_1 (gimple cond,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1113 norm_cond_t norm_cond,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1114 enum tree_code cond_code)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1115 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1116 enum gimple_code gc;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1117 enum tree_code cur_cond_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1118 tree rhs1, rhs2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1119
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1120 gc = gimple_code (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1121 if (gc != GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1122 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1123 VEC_safe_push (gimple, heap, norm_cond->conds, cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1124 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1125 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1126
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1127 cur_cond_code = gimple_assign_rhs_code (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1128 rhs1 = gimple_assign_rhs1 (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1129 rhs2 = gimple_assign_rhs2 (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1130 if (cur_cond_code == NE_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1131 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1132 if (integer_zerop (rhs2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1133 && (TREE_CODE (rhs1) == SSA_NAME))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1134 normalize_cond_1 (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1135 SSA_NAME_DEF_STMT (rhs1),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1136 norm_cond, cond_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1137 else if (integer_zerop (rhs1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1138 && (TREE_CODE (rhs2) == SSA_NAME))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1139 normalize_cond_1 (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1140 SSA_NAME_DEF_STMT (rhs2),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1141 norm_cond, cond_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1142 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1143 VEC_safe_push (gimple, heap, norm_cond->conds, cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1144
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1145 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1146 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1147
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1148 if (is_and_or_or (cur_cond_code, TREE_TYPE (rhs1))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1149 && (cond_code == cur_cond_code \|\| cond_code == ERROR_MARK)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1150 && (TREE_CODE (rhs1) == SSA_NAME && TREE_CODE (rhs2) == SSA_NAME))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1151 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1152 normalize_cond_1 (SSA_NAME_DEF_STMT (rhs1),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1153 norm_cond, cur_cond_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1154 normalize_cond_1 (SSA_NAME_DEF_STMT (rhs2),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1155 norm_cond, cur_cond_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1156 norm_cond->cond_code = cur_cond_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1157 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1158 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1159 VEC_safe_push (gimple, heap, norm_cond->conds, cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1160 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1161
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1162 /* See normalize_cond_1 for details. INVERT is a flag to indicate
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1163 if COND needs to be inverted or not. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1164
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1165 static void
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1166 normalize_cond (gimple cond, norm_cond_t norm_cond, bool invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1167 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1168 enum tree_code cond_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1169
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1170 norm_cond->cond_code = ERROR_MARK;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1171 norm_cond->invert = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1172 norm_cond->conds = NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1173 gcc_assert (gimple_code (cond) == GIMPLE_COND);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1174 cond_code = gimple_cond_code (cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1175 if (invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1176 cond_code = invert_tree_comparison (cond_code, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1177
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1178 if (cond_code == NE_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1179 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1180 if (integer_zerop (gimple_cond_rhs (cond))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1181 && (TREE_CODE (gimple_cond_lhs (cond)) == SSA_NAME))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1182 normalize_cond_1 (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1183 SSA_NAME_DEF_STMT (gimple_cond_lhs (cond)),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1184 norm_cond, ERROR_MARK);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1185 else if (integer_zerop (gimple_cond_lhs (cond))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1186 && (TREE_CODE (gimple_cond_rhs (cond)) == SSA_NAME))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1187 normalize_cond_1 (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1188 SSA_NAME_DEF_STMT (gimple_cond_rhs (cond)),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1189 norm_cond, ERROR_MARK);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1190 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1191 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1192 VEC_safe_push (gimple, heap, norm_cond->conds, cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1193 norm_cond->invert = invert;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1194 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1195 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1196 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1197 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1198 VEC_safe_push (gimple, heap, norm_cond->conds, cond);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1199 norm_cond->invert = invert;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1200 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1201
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1202 gcc_assert (VEC_length (gimple, norm_cond->conds) == 1
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1203 \|\| is_and_or_or (norm_cond->cond_code, NULL));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1204 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1205
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1206 /* Returns true if the domain for condition COND1 is a subset of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1207 COND2. REVERSE is a flag. when it is true the function checks
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1208 if COND1 is a superset of COND2. INVERT1 and INVERT2 are flags
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1209 to indicate if COND1 and COND2 need to be inverted or not. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1210
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1211 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1212 is_gcond_subset_of (gimple cond1, bool invert1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1213 gimple cond2, bool invert2,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1214 bool reverse)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1215 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1216 enum gimple_code gc1, gc2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1217 enum tree_code cond1_code, cond2_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1218 gimple tmp;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1219 tree cond1_lhs, cond1_rhs, cond2_lhs, cond2_rhs;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1220
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1221 /* Take the short cut. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1222 if (cond1 == cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1223 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1224
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1225 if (reverse)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1226 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1227 tmp = cond1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1228 cond1 = cond2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1229 cond2 = tmp;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1230 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1231
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1232 gc1 = gimple_code (cond1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1233 gc2 = gimple_code (cond2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1234
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1235 if ((gc1 != GIMPLE_ASSIGN && gc1 != GIMPLE_COND)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1236 \|\| (gc2 != GIMPLE_ASSIGN && gc2 != GIMPLE_COND))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1237 return cond1 == cond2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1238
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1239 cond1_code = ((gc1 == GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1240 ? gimple_assign_rhs_code (cond1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1241 : gimple_cond_code (cond1));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1242
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1243 cond2_code = ((gc2 == GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1244 ? gimple_assign_rhs_code (cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1245 : gimple_cond_code (cond2));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1246
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1247 if (TREE_CODE_CLASS (cond1_code) != tcc_comparison
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1248 \|\| TREE_CODE_CLASS (cond2_code) != tcc_comparison)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1249 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1250
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1251 if (invert1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1252 cond1_code = invert_tree_comparison (cond1_code, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1253 if (invert2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1254 cond2_code = invert_tree_comparison (cond2_code, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1255
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1256 cond1_lhs = ((gc1 == GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1257 ? gimple_assign_rhs1 (cond1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1258 : gimple_cond_lhs (cond1));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1259 cond1_rhs = ((gc1 == GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1260 ? gimple_assign_rhs2 (cond1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1261 : gimple_cond_rhs (cond1));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1262 cond2_lhs = ((gc2 == GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1263 ? gimple_assign_rhs1 (cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1264 : gimple_cond_lhs (cond2));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1265 cond2_rhs = ((gc2 == GIMPLE_ASSIGN)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1266 ? gimple_assign_rhs2 (cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1267 : gimple_cond_rhs (cond2));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1268
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1269 /* Assuming const operands have been swapped to the
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1270 rhs at this point of the analysis. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1271
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1272 if (cond1_lhs != cond2_lhs)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1273 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1274
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1275 if (!is_gimple_constant (cond1_rhs)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1276 \|\| TREE_CODE (cond1_rhs) != INTEGER_CST)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1277 return (cond1_rhs == cond2_rhs);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1278
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1279 if (!is_gimple_constant (cond2_rhs)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1280 \|\| TREE_CODE (cond2_rhs) != INTEGER_CST)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1281 return (cond1_rhs == cond2_rhs);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1282
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1283 if (cond1_code == EQ_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1284 return is_value_included_in (cond1_rhs,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1285 cond2_rhs, cond2_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1286 if (cond1_code == NE_EXPR \|\| cond2_code == EQ_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1287 return ((cond2_code == cond1_code)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1288 && tree_int_cst_equal (cond1_rhs, cond2_rhs));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1289
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1290 if (((cond1_code == GE_EXPR \|\| cond1_code == GT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1291 && (cond2_code == LE_EXPR \|\| cond2_code == LT_EXPR))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1292 \|\| ((cond1_code == LE_EXPR \|\| cond1_code == LT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1293 && (cond2_code == GE_EXPR \|\| cond2_code == GT_EXPR)))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1294 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1295
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1296 if (cond1_code != GE_EXPR && cond1_code != GT_EXPR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1297 && cond1_code != LE_EXPR && cond1_code != LT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1298 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1299
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1300 if (cond1_code == GT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1301 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1302 cond1_code = GE_EXPR;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1303 cond1_rhs = fold_binary (PLUS_EXPR, TREE_TYPE (cond1_rhs),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1304 cond1_rhs,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1305 fold_convert (TREE_TYPE (cond1_rhs),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1306 integer_one_node));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1307 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1308 else if (cond1_code == LT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1309 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1310 cond1_code = LE_EXPR;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1311 cond1_rhs = fold_binary (MINUS_EXPR, TREE_TYPE (cond1_rhs),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1312 cond1_rhs,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1313 fold_convert (TREE_TYPE (cond1_rhs),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1314 integer_one_node));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1315 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1316
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1317 if (!cond1_rhs)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1318 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1319
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1320 gcc_assert (cond1_code == GE_EXPR \|\| cond1_code == LE_EXPR);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1321
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1322 if (cond2_code == GE_EXPR \|\| cond2_code == GT_EXPR \|\|
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1323 cond2_code == LE_EXPR \|\| cond2_code == LT_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1324 return is_value_included_in (cond1_rhs,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1325 cond2_rhs, cond2_code);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1326 else if (cond2_code == NE_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1327 return
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1328 (is_value_included_in (cond1_rhs,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1329 cond2_rhs, cond2_code)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1330 && !is_value_included_in (cond2_rhs,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1331 cond1_rhs, cond1_code));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1332 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1333 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1334
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1335 /* Returns true if the domain of the condition expression
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1336 in COND is a subset of any of the sub-conditions
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1337 of the normalized condtion NORM_COND. INVERT is a flag
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1338 to indicate of the COND needs to be inverted.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1339 REVERSE is a flag. When it is true, the check is reversed --
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1340 it returns true if COND is a superset of any of the subconditions
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1341 of NORM_COND. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1342
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1343 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1344 is_subset_of_any (gimple cond, bool invert,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1345 norm_cond_t norm_cond, bool reverse)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1346 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1347 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1348 size_t len = VEC_length (gimple, norm_cond->conds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1349
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1350 for (i = 0; i < len; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1351 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1352 if (is_gcond_subset_of (cond, invert,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1353 VEC_index (gimple, norm_cond->conds, i),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1354 false, reverse))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1355 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1356 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1357 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1358 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1359
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1360 /* NORM_COND1 and NORM_COND2 are normalized logical/BIT OR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1361 expressions (formed by following UD chains not control
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1362 dependence chains). The function returns true of domain
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1363 of and expression NORM_COND1 is a subset of NORM_COND2's.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1364 The implementation is conservative, and it returns false if
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1365 it the inclusion relationship may not hold. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1366
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1367 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1368 is_or_set_subset_of (norm_cond_t norm_cond1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1369 norm_cond_t norm_cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1370 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1371 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1372 size_t len = VEC_length (gimple, norm_cond1->conds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1373
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1374 for (i = 0; i < len; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1375 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1376 if (!is_subset_of_any (VEC_index (gimple, norm_cond1->conds, i),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1377 false, norm_cond2, false))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1378 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1379 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1380 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1381 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1382
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1383 /* NORM_COND1 and NORM_COND2 are normalized logical AND
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1384 expressions (formed by following UD chains not control
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1385 dependence chains). The function returns true of domain
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1386 of and expression NORM_COND1 is a subset of NORM_COND2's. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1387
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1388 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1389 is_and_set_subset_of (norm_cond_t norm_cond1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1390 norm_cond_t norm_cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1391 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1392 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1393 size_t len = VEC_length (gimple, norm_cond2->conds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1394
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1395 for (i = 0; i < len; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1396 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1397 if (!is_subset_of_any (VEC_index (gimple, norm_cond2->conds, i),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1398 false, norm_cond1, true))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1399 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1400 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1401 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1402 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1403
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1404 /* Returns true of the domain if NORM_COND1 is a subset
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1405 of that of NORM_COND2. Returns false if it can not be
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1406 proved to be so. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1407
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1408 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1409 is_norm_cond_subset_of (norm_cond_t norm_cond1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1410 norm_cond_t norm_cond2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1411 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1412 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1413 enum tree_code code1, code2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1414
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1415 code1 = norm_cond1->cond_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1416 code2 = norm_cond2->cond_code;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1417
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1418 if (code1 == TRUTH_AND_EXPR \|\| code1 == BIT_AND_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1419 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1420 /* Both conditions are AND expressions. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1421 if (code2 == TRUTH_AND_EXPR \|\| code2 == BIT_AND_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1422 return is_and_set_subset_of (norm_cond1, norm_cond2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1423 /* NORM_COND1 is an AND expression, and NORM_COND2 is an OR
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1424 expression. In this case, returns true if any subexpression
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1425 of NORM_COND1 is a subset of any subexpression of NORM_COND2. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1426 else if (code2 == TRUTH_OR_EXPR \|\| code2 == BIT_IOR_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1427 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1428 size_t len1;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1429 len1 = VEC_length (gimple, norm_cond1->conds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1430 for (i = 0; i < len1; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1431 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1432 gimple cond1 = VEC_index (gimple, norm_cond1->conds, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1433 if (is_subset_of_any (cond1, false, norm_cond2, false))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1434 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1435 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1436 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1437 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1438 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1439 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1440 gcc_assert (code2 == ERROR_MARK);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1441 gcc_assert (VEC_length (gimple, norm_cond2->conds) == 1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1442 return is_subset_of_any (VEC_index (gimple, norm_cond2->conds, 0),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1443 norm_cond2->invert, norm_cond1, true);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1444 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1445 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1446 /* NORM_COND1 is an OR expression */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1447 else if (code1 == TRUTH_OR_EXPR \|\| code1 == BIT_IOR_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1448 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1449 if (code2 != code1)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1450 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1451
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1452 return is_or_set_subset_of (norm_cond1, norm_cond2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1453 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1454 else
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1455 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1456 gcc_assert (code1 == ERROR_MARK);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1457 gcc_assert (VEC_length (gimple, norm_cond1->conds) == 1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1458 /* Conservatively returns false if NORM_COND1 is non-decomposible
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1459 and NORM_COND2 is an AND expression. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1460 if (code2 == TRUTH_AND_EXPR \|\| code2 == BIT_AND_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1461 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1462
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1463 if (code2 == TRUTH_OR_EXPR \|\| code2 == BIT_IOR_EXPR)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1464 return is_subset_of_any (VEC_index (gimple, norm_cond1->conds, 0),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1465 norm_cond1->invert, norm_cond2, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1466
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1467 gcc_assert (code2 == ERROR_MARK);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1468 gcc_assert (VEC_length (gimple, norm_cond2->conds) == 1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1469 return is_gcond_subset_of (VEC_index (gimple, norm_cond1->conds, 0),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1470 norm_cond1->invert,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1471 VEC_index (gimple, norm_cond2->conds, 0),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1472 norm_cond2->invert, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1473 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1474 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1475
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1476 /* Returns true of the domain of single predicate expression
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1477 EXPR1 is a subset of that of EXPR2. Returns false if it
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1478 can not be proved. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1479
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1480 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1481 is_pred_expr_subset_of (use_pred_info_t expr1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1482 use_pred_info_t expr2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1483 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1484 gimple cond1, cond2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1485 enum tree_code code1, code2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1486 struct norm_cond norm_cond1, norm_cond2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1487 bool is_subset = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1488
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1489 cond1 = expr1->cond;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1490 cond2 = expr2->cond;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1491 code1 = gimple_cond_code (cond1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1492 code2 = gimple_cond_code (cond2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1493
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1494 if (expr1->invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1495 code1 = invert_tree_comparison (code1, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1496 if (expr2->invert)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1497 code2 = invert_tree_comparison (code2, false);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1498
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1499 /* Fast path -- match exactly */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1500 if ((gimple_cond_lhs (cond1) == gimple_cond_lhs (cond2))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1501 && (gimple_cond_rhs (cond1) == gimple_cond_rhs (cond2))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1502 && (code1 == code2))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1503 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1504
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1505 /* Normalize conditions. To keep NE_EXPR, do not invert
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1506 with both need inversion. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1507 normalize_cond (cond1, &norm_cond1, (expr1->invert));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1508 normalize_cond (cond2, &norm_cond2, (expr2->invert));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1509
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1510 is_subset = is_norm_cond_subset_of (&norm_cond1, &norm_cond2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1511
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1512 /* Free memory */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1513 VEC_free (gimple, heap, norm_cond1.conds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1514 VEC_free (gimple, heap, norm_cond2.conds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1515 return is_subset ;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1516 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1517
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1518 /* Returns true if the domain of PRED1 is a subset
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1519 of that of PRED2. Returns false if it can not be proved so. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1520
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1521 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1522 is_pred_chain_subset_of (VEC(use_pred_info_t, heap) *pred1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1523 VEC(use_pred_info_t, heap) *pred2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1524 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1525 size_t np1, np2, i1, i2;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1526
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1527 np1 = VEC_length (use_pred_info_t, pred1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1528 np2 = VEC_length (use_pred_info_t, pred2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1529
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1530 for (i2 = 0; i2 < np2; i2++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1531 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1532 bool found = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1533 use_pred_info_t info2
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1534 = VEC_index (use_pred_info_t, pred2, i2);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1535 for (i1 = 0; i1 < np1; i1++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1536 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1537 use_pred_info_t info1
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1538 = VEC_index (use_pred_info_t, pred1, i1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1539 if (is_pred_expr_subset_of (info1, info2))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1540 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1541 found = true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1542 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1543 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1544 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1545 if (!found)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1546 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1547 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1548 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1549 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1550
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1551 /* Returns true if the domain defined by
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1552 one pred chain ONE_PRED is a subset of the domain
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1553 of *PREDS. It returns false if ONE_PRED's domain is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1554 not a subset of any of the sub-domains of PREDS (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1555 corresponding to each individual chains in it), even
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1556 though it may be still be a subset of whole domain
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1557 of PREDS which is the union (ORed) of all its subdomains.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1558 In other words, the result is conservative. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1559
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1560 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1561 is_included_in (VEC(use_pred_info_t, heap) *one_pred,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1562 VEC(use_pred_info_t, heap) **preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1563 size_t n)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1564 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1565 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1566
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1567 for (i = 0; i < n; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1568 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1569 if (is_pred_chain_subset_of (one_pred, preds[i]))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1570 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1571 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1572
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1573 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1574 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1575
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1576 /* compares two predicate sets PREDS1 and PREDS2 and returns
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1577 true if the domain defined by PREDS1 is a superset
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1578 of PREDS2's domain. N1 and N2 are array sizes of PREDS1 and
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1579 PREDS2 respectively. The implementation chooses not to build
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1580 generic trees (and relying on the folding capability of the
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1581 compiler), but instead performs brute force comparison of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1582 individual predicate chains (won't be a compile time problem
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1583 as the chains are pretty short). When the function returns
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1584 false, it does not necessarily mean *PREDS1 is not a superset
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1585 of *PREDS2, but mean it may not be so since the analysis can
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1586 not prove it. In such cases, false warnings may still be
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1587 emitted. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1588
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1589 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1590 is_superset_of (VEC(use_pred_info_t, heap) **preds1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1591 size_t n1,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1592 VEC(use_pred_info_t, heap) **preds2,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1593 size_t n2)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1594 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1595 size_t i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1596 VEC(use_pred_info_t, heap) *one_pred_chain;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1597
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1598 for (i = 0; i < n2; i++)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1599 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1600 one_pred_chain = preds2[i];
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1601 if (!is_included_in (one_pred_chain, preds1, n1))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1602 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1603 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1604
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1605 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1606 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1607
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1608 /* Computes the predicates that guard the use and checks
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1609 if the incoming paths that have empty (or possibly
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1610 empty) defintion can be pruned/filtered. The function returns
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1611 true if it can be determined that the use of PHI's def in
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1612 USE_STMT is guarded with a predicate set not overlapping with
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1613 predicate sets of all runtime paths that do not have a definition.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1614 Returns false if it is not or it can not be determined. USE_BB is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1615 the bb of the use (for phi operand use, the bb is not the bb of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1616 the phi stmt, but the src bb of the operand edge). UNINIT_OPNDS
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1617 is a bit vector. If an operand of PHI is uninitialized, the
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1618 correponding bit in the vector is 1. VISIED_PHIS is a pointer
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1619 set of phis being visted. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1620
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1621 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1622 is_use_properly_guarded (gimple use_stmt,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1623 basic_block use_bb,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1624 gimple phi,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1625 unsigned uninit_opnds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1626 struct pointer_set_t *visited_phis)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1627 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1628 basic_block phi_bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1629 VEC(use_pred_info_t, heap) **preds = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1630 VEC(use_pred_info_t, heap) **def_preds = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1631 size_t num_preds = 0, num_def_preds = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1632 bool has_valid_preds = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1633 bool is_properly_guarded = false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1634
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1635 if (pointer_set_insert (visited_phis, phi))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1636 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1637
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1638 phi_bb = gimple_bb (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1639
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1640 if (is_non_loop_exit_postdominating (use_bb, phi_bb))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1641 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1642
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1643 has_valid_preds = find_predicates (&preds, &num_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1644 phi_bb, use_bb);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1645
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1646 if (!has_valid_preds)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1647 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1648 destroy_predicate_vecs (num_preds, preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1649 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1650 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1651
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1652 if (dump_file)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1653 dump_predicates (use_stmt, num_preds, preds,
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1654 "\nUse in stmt ");
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1655
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1656 has_valid_preds = find_def_preds (&def_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1657 &num_def_preds, phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1658
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1659 if (has_valid_preds)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1660 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1661 if (dump_file)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1662 dump_predicates (phi, num_def_preds, def_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1663 "Operand defs of phi ");
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1664 is_properly_guarded =
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1665 is_superset_of (def_preds, num_def_preds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1666 preds, num_preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1667 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1668
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1669 /* further prune the dead incoming phi edges. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1670 if (!is_properly_guarded)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1671 is_properly_guarded
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1672 = use_pred_not_overlap_with_undef_path_pred (
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1673 num_preds, preds, phi, uninit_opnds, visited_phis);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1674
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1675 destroy_predicate_vecs (num_preds, preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1676 destroy_predicate_vecs (num_def_preds, def_preds);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1677 return is_properly_guarded;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1678 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1679
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1680 /* Searches through all uses of a potentially
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1681 uninitialized variable defined by PHI and returns a use
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1682 statement if the use is not properly guarded. It returns
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1683 NULL if all uses are guarded. UNINIT_OPNDS is a bitvector
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1684 holding the position(s) of uninit PHI operands. WORKLIST
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1685 is the vector of candidate phis that may be updated by this
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1686 function. ADDED_TO_WORKLIST is the pointer set tracking
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1687 if the new phi is already in the worklist. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1688
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1689 static gimple
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1690 find_uninit_use (gimple phi, unsigned uninit_opnds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1691 VEC(gimple, heap) **worklist,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1692 struct pointer_set_t *added_to_worklist)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1693 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1694 tree phi_result;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1695 use_operand_p use_p;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1696 gimple use_stmt;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1697 imm_use_iterator iter;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1698
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1699 phi_result = gimple_phi_result (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1700
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1701 FOR_EACH_IMM_USE_FAST (use_p, iter, phi_result)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1702 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1703 struct pointer_set_t *visited_phis;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1704 basic_block use_bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1705
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1706 use_stmt = USE_STMT (use_p);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1707 if (is_gimple_debug (use_stmt))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1708 continue;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1709
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1710 visited_phis = pointer_set_create ();
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1711
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1712 if (gimple_code (use_stmt) == GIMPLE_PHI)
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1713 use_bb = gimple_phi_arg_edge (use_stmt,
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1714 PHI_ARG_INDEX_FROM_USE (use_p))->src;
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1715 else
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1716 use_bb = gimple_bb (use_stmt);
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1717
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1718 if (is_use_properly_guarded (use_stmt,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1719 use_bb,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1720 phi,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1721 uninit_opnds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1722 visited_phis))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1723 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1724 pointer_set_destroy (visited_phis);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1725 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1726 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1727 pointer_set_destroy (visited_phis);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1728
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1729 if (dump_file && (dump_flags & TDF_DETAILS))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1730 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1731 fprintf (dump_file, "[CHECK]: Found unguarded use: ");
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1732 print_gimple_stmt (dump_file, use_stmt, 0, 0);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1733 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1734 /* Found one real use, return. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1735 if (gimple_code (use_stmt) != GIMPLE_PHI)
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1736 return use_stmt;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1737
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1738 /* Found a phi use that is not guarded,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1739 add the phi to the worklist. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1740 if (!pointer_set_insert (added_to_worklist,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1741 use_stmt))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1742 {
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1743 if (dump_file && (dump_flags & TDF_DETAILS))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1744 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1745 fprintf (dump_file, "[WORKLIST]: Update worklist with phi: ");
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1746 print_gimple_stmt (dump_file, use_stmt, 0, 0);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1747 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1748
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1749 VEC_safe_push (gimple, heap, *worklist, use_stmt);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1750 pointer_set_insert (possibly_undefined_names,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1751 phi_result);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1752 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1753 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1754
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1755 return NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1756 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1757
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1758 /* Look for inputs to PHI that are SSA_NAMEs that have empty definitions
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1759 and gives warning if there exists a runtime path from the entry to a
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1760 use of the PHI def that does not contain a definition. In other words,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1761 the warning is on the real use. The more dead paths that can be pruned
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1762 by the compiler, the fewer false positives the warning is. WORKLIST
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1763 is a vector of candidate phis to be examined. ADDED_TO_WORKLIST is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1764 a pointer set tracking if the new phi is added to the worklist or not. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1765
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1766 static void
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1767 warn_uninitialized_phi (gimple phi, VEC(gimple, heap) **worklist,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1768 struct pointer_set_t *added_to_worklist)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1769 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1770 unsigned uninit_opnds;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1771 gimple uninit_use_stmt = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1772 tree uninit_op;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1773
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1774 /* Don't look at memory tags. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1775 if (!is_gimple_reg (gimple_phi_result (phi)))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1776 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1777
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1778 uninit_opnds = compute_uninit_opnds_pos (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1779
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1780 if (MASK_EMPTY (uninit_opnds))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1781 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1782
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1783 if (dump_file && (dump_flags & TDF_DETAILS))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1784 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1785 fprintf (dump_file, "[CHECK]: examining phi: ");
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1786 print_gimple_stmt (dump_file, phi, 0, 0);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1787 }
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1788
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1789 /* Now check if we have any use of the value without proper guard. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1790 uninit_use_stmt = find_uninit_use (phi, uninit_opnds,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1791 worklist, added_to_worklist);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1792
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1793 /* All uses are properly guarded. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1794 if (!uninit_use_stmt)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1795 return;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1796
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1797 uninit_op = gimple_phi_arg_def (phi, MASK_FIRST_SET_BIT (uninit_opnds));
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1798 warn_uninit (uninit_op,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1799 "%qD may be used uninitialized in this function",
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1800 uninit_use_stmt);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1801
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1802 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1803
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1804
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1805 /* Entry point to the late uninitialized warning pass. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1806
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1807 static unsigned int
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1808 execute_late_warn_uninitialized (void)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1809 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1810 basic_block bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1811 gimple_stmt_iterator gsi;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1812 VEC(gimple, heap) *worklist = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1813 struct pointer_set_t *added_to_worklist;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1814
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1815 calculate_dominance_info (CDI_DOMINATORS);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1816 calculate_dominance_info (CDI_POST_DOMINATORS);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1817 /* Re-do the plain uninitialized variable check, as optimization may have
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1818 straightened control flow. Do this first so that we don't accidentally
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1819 get a "may be" warning when we'd have seen an "is" warning later. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1820 warn_uninitialized_vars (/warn_possibly_uninitialized=/1);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1821
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1822 timevar_push (TV_TREE_UNINIT);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1823
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1824 possibly_undefined_names = pointer_set_create ();
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1825 added_to_worklist = pointer_set_create ();
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1826
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1827 /* Initialize worklist */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1828 FOR_EACH_BB (bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1829 for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1830 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1831 gimple phi = gsi_stmt (gsi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1832 size_t n, i;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1833
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1834 n = gimple_phi_num_args (phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1835
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1836 /* Don't look at memory tags. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1837 if (!is_gimple_reg (gimple_phi_result (phi)))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1838 continue;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1839
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1840 for (i = 0; i < n; ++i)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1841 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1842 tree op = gimple_phi_arg_def (phi, i);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1843 if (TREE_CODE (op) == SSA_NAME
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1844 && ssa_undefined_value_p (op))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1845 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1846 VEC_safe_push (gimple, heap, worklist, phi);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1847 pointer_set_insert (added_to_worklist, phi);
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1848 if (dump_file && (dump_flags & TDF_DETAILS))
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1849 {
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1850 fprintf (dump_file, "[WORKLIST]: add to initial list: ");
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1851 print_gimple_stmt (dump_file, phi, 0, 0);
f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1852 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1853 break;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1854 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1855 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1856 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1857
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1858 while (VEC_length (gimple, worklist) != 0)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1859 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1860 gimple cur_phi = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1861 cur_phi = VEC_pop (gimple, worklist);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1862 warn_uninitialized_phi (cur_phi, &worklist, added_to_worklist);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1863 }
67 f6334be47118 update gcc from gcc-4.6-20100522 to gcc-4.6-20110318 nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> parents: 63 diff changeset	1864
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1865 VEC_free (gimple, heap, worklist);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1866 pointer_set_destroy (added_to_worklist);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1867 pointer_set_destroy (possibly_undefined_names);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1868 possibly_undefined_names = NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1869 free_dominance_info (CDI_POST_DOMINATORS);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1870 timevar_pop (TV_TREE_UNINIT);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1871 return 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1872 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1873
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1874 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1875 gate_warn_uninitialized (void)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1876 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1877 return warn_uninitialized != 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1878 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1879
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1880 struct gimple_opt_pass pass_late_warn_uninitialized =
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1881 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1882 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1883 GIMPLE_PASS,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1884 "uninit", /* name */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1885 gate_warn_uninitialized, /* gate */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1886 execute_late_warn_uninitialized, /* execute */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1887 NULL, /* sub */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1888 NULL, /* next */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1889 0, /* static_pass_number */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1890 TV_NONE, /* tv_id */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1891 PROP_ssa, /* properties_required */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1892 0, /* properties_provided */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1893 0, /* properties_destroyed */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1894 0, /* todo_flags_start */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1895 0 /* todo_flags_finish */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1896 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: diff changeset	1897 };

Mercurial > hg > CbC > CbC_gcc

annotate gcc/tree-ssa-uninit.c @ 67:f6334be47118