CbC/CbC_gcc: gcc/tree-if-conv.c annotate

annotate gcc/tree-if-conv.c @ 88:f214c1d5b862

merge 89

author	Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date	Tue, 20 Dec 2011 18:53:46 +0900
parents	f6334be47118
children	04ced10e8804

rev	line source
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1 /* If-conversion for vectorizer.
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	3 Free Software Foundation, Inc.
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	4 Contributed by Devang Patel <dpatel@apple.com>
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	5
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	6 This file is part of GCC.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	7
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	8 GCC is free software; you can redistribute it and/or modify it under
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	9 the terms of the GNU General Public License as published by the Free
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	10 Software Foundation; either version 3, or (at your option) any later
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	11 version.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	12
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	16 for more details.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	17
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	18 You should have received a copy of the GNU General Public License
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	19 along with GCC; see the file COPYING3. If not see
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	20 <http://www.gnu.org/licenses/>. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	21
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	22 /* This pass implements a tree level if-conversion of loops. Its
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	23 initial goal is to help the vectorizer to vectorize loops with
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	24 conditions.
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	25
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	26 A short description of if-conversion:
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	27
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	28 o Decide if a loop is if-convertible or not.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	29 o Walk all loop basic blocks in breadth first order (BFS order).
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	30 o Remove conditional statements (at the end of basic block)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	31 and propagate condition into destination basic blocks'
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	32 predicate list.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	33 o Replace modify expression with conditional modify expression
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	34 using current basic block's condition.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	35 o Merge all basic blocks
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	36 o Replace phi nodes with conditional modify expr
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	37 o Merge all basic blocks into header
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	38
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	39 Sample transformation:
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	40
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	41 INPUT
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	42 -----
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	43
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	44 # i_23 = PHI <0(0), i_18(10)>;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	45 <L0>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	46 j_15 = A[i_23];
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	47 if (j_15 > 41) goto <L1>; else goto <L17>;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	48
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	49 <L17>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	50 goto <bb 3> (<L3>);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	51
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	52 <L1>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	53
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	54 # iftmp.2_4 = PHI <0(8), 42(2)>;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	55 <L3>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	56 A[i_23] = iftmp.2_4;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	57 i_18 = i_23 + 1;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	58 if (i_18 <= 15) goto <L19>; else goto <L18>;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	59
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	60 <L19>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	61 goto <bb 1> (<L0>);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	62
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	63 <L18>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	64
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	65 OUTPUT
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	66 ------
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	67
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	68 # i_23 = PHI <0(0), i_18(10)>;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	69 <L0>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	70 j_15 = A[i_23];
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	71
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	72 <L3>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	73 iftmp.2_4 = j_15 > 41 ? 42 : 0;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	74 A[i_23] = iftmp.2_4;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	75 i_18 = i_23 + 1;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	76 if (i_18 <= 15) goto <L19>; else goto <L18>;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	77
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	78 <L19>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	79 goto <bb 1> (<L0>);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	80
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	81 <L18>:;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	82 */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	83
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	84 #include "config.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	85 #include "system.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	86 #include "coretypes.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	87 #include "tm.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	88 #include "tree.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	89 #include "flags.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	90 #include "timevar.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	91 #include "basic-block.h"
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	92 #include "tree-pretty-print.h"
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	93 #include "gimple-pretty-print.h"
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	94 #include "tree-flow.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	95 #include "tree-dump.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	96 #include "cfgloop.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	97 #include "tree-chrec.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	98 #include "tree-data-ref.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	99 #include "tree-scalar-evolution.h"
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	100 #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	101 #include "dbgcnt.h"
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	102
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	103 /* List of basic blocks in if-conversion-suitable order. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	104 static basic_block *ifc_bbs;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	105
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	106 /* Structure used to predicate basic blocks. This is attached to 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	107 ->aux field of the BBs in the loop to be if-converted. */
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	108 typedef struct bb_predicate_s {
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	109
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	110 /* The condition under which this basic block is executed. */
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	111 tree 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	112
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	113 /* PREDICATE is gimplified, and the sequence of statements is
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	114 recorded here, in order to avoid the duplication of computations
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	115 that occur in previous conditions. See PR44483. */
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	116 gimple_seq predicate_gimplified_stmts;
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	117 } *bb_predicate_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	118
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	119 /* Returns true when the basic block BB has a 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	120
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	121 static inline 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	122 bb_has_predicate (basic_block bb)
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	123 {
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	124 return bb->aux != 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	125 }
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	126
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	127 /* Returns the gimplified predicate for basic block BB. */
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	128
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	129 static inline tree
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	130 bb_predicate (basic_block bb)
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	131 {
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	132 return ((bb_predicate_p) bb->aux)->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	133 }
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	134
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	135 /* Sets the gimplified predicate COND for basic block BB. */
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	136
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	137 static inline void
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	138 set_bb_predicate (basic_block bb, tree cond)
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	139 {
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	140 ((bb_predicate_p) bb->aux)->predicate = cond;
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	141 }
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	142
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	143 /* Returns the sequence of statements of the gimplification 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	144 predicate for basic block BB. */
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	145
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	146 static inline gimple_seq
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	147 bb_predicate_gimplified_stmts (basic_block bb)
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	148 {
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	149 return ((bb_predicate_p) bb->aux)->predicate_gimplified_stmts;
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	150 }
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
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 /* Sets the sequence of statements STMTS of the gimplification 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	153 predicate for basic block BB. */
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	154
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	155 static inline void
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	156 set_bb_predicate_gimplified_stmts (basic_block bb, gimple_seq stmts)
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	157 {
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	158 ((bb_predicate_p) bb->aux)->predicate_gimplified_stmts = stmts;
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	159 }
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	160
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	161 /* Adds the sequence of statements STMTS to the sequence of statements
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	162 of the predicate for basic block BB. */
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	163
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	164 static inline void
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	165 add_bb_predicate_gimplified_stmts (basic_block bb, gimple_seq stmts)
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	166 {
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	167 gimple_seq_add_seq
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	168 (&(((bb_predicate_p) bb->aux)->predicate_gimplified_stmts), stmts);
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	169 }
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	170
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	171 /* Initializes to TRUE the predicate of basic block BB. */
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	172
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	173 static inline void
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	174 init_bb_predicate (basic_block bb)
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	175 {
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	176 bb->aux = XNEW (struct bb_predicate_s);
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	177 set_bb_predicate_gimplified_stmts (bb, 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	178 set_bb_predicate (bb, boolean_true_node);
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	179 }
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	180
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	181 /* Free the predicate of basic block BB. */
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	182
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	183 static inline void
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	184 free_bb_predicate (basic_block bb)
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	185 {
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	186 gimple_seq stmts;
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	187
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	188 if (!bb_has_predicate (bb))
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	189 return;
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	190
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	191 /* Release the SSA_NAMEs created for the gimplification 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	192 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	193 stmts = bb_predicate_gimplified_stmts (bb);
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	194 if (stmts)
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	195 {
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	196 gimple_stmt_iterator 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	197
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	198 for (i = gsi_start (stmts); !gsi_end_p (i); gsi_next (&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	199 free_stmt_operands (gsi_stmt (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	200 }
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	201
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	202 free (bb->aux);
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	203 bb->aux = 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	204 }
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	205
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	206 /* Free the predicate of BB and reinitialize it with the 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	207 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	208
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	209 static inline void
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	210 reset_bb_predicate (basic_block bb)
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	211 {
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	212 free_bb_predicate (bb);
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	213 init_bb_predicate (bb);
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	214 }
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	215
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	216 /* Returns a new SSA_NAME of type TYPE that is assigned the value of
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	217 the expression EXPR. Inserts the statement created for this
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	218 computation before GSI and leaves the iterator GSI at the same
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	219 statement. */
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	220
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	221 static tree
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	222 ifc_temp_var (tree type, tree expr, gimple_stmt_iterator *gsi)
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	223 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	224 const char *name = "_ifc_";
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	225 tree var, new_name;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	226 gimple stmt;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	227
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	228 /* Create new temporary variable. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	229 var = create_tmp_var (type, name);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	230 add_referenced_var (var);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	231
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	232 /* Build new statement to assign EXPR to new variable. */
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	233 stmt = gimple_build_assign (var, expr);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	234
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	235 /* Get SSA name for the new variable and set make new statement
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	236 its definition statement. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	237 new_name = make_ssa_name (var, stmt);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	238 gimple_assign_set_lhs (stmt, new_name);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	239 SSA_NAME_DEF_STMT (new_name) = stmt;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	240 update_stmt (stmt);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	241
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	242 gsi_insert_before (gsi, stmt, GSI_SAME_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	243 return gimple_assign_lhs (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	244 }
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	245
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	246 /* Return true when COND is a true 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	247
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	248 static inline 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	249 is_true_predicate (tree cond)
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	250 {
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	251 return (cond == NULL_TREE
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	252 \|\| cond == boolean_true_node
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	253 \|\| integer_onep (cond));
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	254 }
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	255
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	256 /* Returns true when BB has a predicate that is not trivial: true or
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	257 NULL_TREE. */
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	258
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	259 static inline 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	260 is_predicated (basic_block bb)
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	261 {
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	262 return !is_true_predicate (bb_predicate (bb));
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	263 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	264
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	265 /* Parses the predicate COND and returns its comparison code 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	266 operands OP0 and OP1. */
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	267
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	268 static enum tree_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	269 parse_predicate (tree cond, tree op0, tree op1)
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	270 {
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	271 gimple s;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	272
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	273 if (TREE_CODE (cond) == 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	274 && is_gimple_assign (s = SSA_NAME_DEF_STMT (cond)))
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	275 {
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	276 if (TREE_CODE_CLASS (gimple_assign_rhs_code (s)) == tcc_comparison)
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	277 {
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	278 *op0 = gimple_assign_rhs1 (s);
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	279 *op1 = gimple_assign_rhs2 (s);
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	280 return gimple_assign_rhs_code (s);
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	281 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	282
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	283 else if (gimple_assign_rhs_code (s) == TRUTH_NOT_EXPR)
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	284 {
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	285 tree op = gimple_assign_rhs1 (s);
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	286 tree type = TREE_TYPE (op);
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	287 enum tree_code code = parse_predicate (op, op0, op1);
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	288
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	289 return code == ERROR_MARK ? ERROR_MARK
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	290 : invert_tree_comparison (code, HONOR_NANS (TYPE_MODE (type)));
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	291 }
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	292
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	293 return ERROR_MARK;
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	294 }
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	295
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	296 if (TREE_CODE_CLASS (TREE_CODE (cond)) == tcc_comparison)
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	297 {
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	298 *op0 = TREE_OPERAND (cond, 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	299 *op1 = TREE_OPERAND (cond, 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	300 return TREE_CODE (cond);
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	301 }
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	302
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	303 return ERROR_MARK;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	304 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	305
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	306 /* Returns the fold of predicate C1 OR C2 at location LOC. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	307
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	308 static tree
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	309 fold_or_predicates (location_t loc, tree c1, tree c2)
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	310 {
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	311 tree op1a, op1b, op2a, op2b;
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	312 enum tree_code code1 = parse_predicate (c1, &op1a, &op1b);
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	313 enum tree_code code2 = parse_predicate (c2, &op2a, &op2b);
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	314
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	315 if (code1 != ERROR_MARK && code2 != ERROR_MARK)
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	316 {
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	317 tree t = maybe_fold_or_comparisons (code1, op1a, op1b,
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	318 code2, op2a, op2b);
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	319 if (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	320 return 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	321 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	322
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	323 return fold_build2_loc (loc, TRUTH_OR_EXPR, boolean_type_node, c1, c2);
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	324 }
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	325
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	326 /* Add condition NC to the predicate list of basic block BB. */
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	327
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	328 static inline void
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	329 add_to_predicate_list (basic_block bb, tree nc)
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	330 {
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	331 tree bc;
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	332
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	333 if (is_true_predicate (nc))
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	334 return;
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	335
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	336 if (!is_predicated (bb))
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	337 bc = nc;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	338 else
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	339 {
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	340 bc = bb_predicate (bb);
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	341 bc = fold_or_predicates (EXPR_LOCATION (bc), nc, bc);
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	342 }
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	343
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	344 if (!is_gimple_condexpr (bc))
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	345 {
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	346 gimple_seq stmts;
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	347 bc = force_gimple_operand (bc, &stmts, true, NULL_TREE);
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	348 add_bb_predicate_gimplified_stmts (bb, stmts);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	349 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	350
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	351 if (is_true_predicate (bc))
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	352 reset_bb_predicate (bb);
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	353 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	354 set_bb_predicate (bb, bc);
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	355 }
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	356
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	357 /* Add the condition COND to the previous condition PREV_COND, and add
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	358 this to the predicate list of the destination of edge E. LOOP is
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	359 the loop to be if-converted. */
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	360
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	361 static void
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	362 add_to_dst_predicate_list (struct loop *loop, edge e,
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	363 tree prev_cond, tree cond)
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	364 {
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	365 if (!flow_bb_inside_loop_p (loop, e->dest))
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	366 return;
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	367
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	368 if (!is_true_predicate (prev_cond))
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	369 cond = fold_build2 (TRUTH_AND_EXPR, boolean_type_node,
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	370 prev_cond, cond);
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	371
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	372 add_to_predicate_list (e->dest, cond);
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	373 }
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	374
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	375 /* Return true if one of the successor edges of BB exits LOOP. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	376
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	377 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	378 bb_with_exit_edge_p (struct loop *loop, basic_block bb)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	379 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	380 edge e;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	381 edge_iterator ei;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	382
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	383 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: 55 diff changeset	384 if (loop_exit_edge_p (loop, e))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	385 return true;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	386
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	387 return false;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	388 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	389
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	390 /* Return true when PHI is if-convertible. PHI is part of loop LOOP
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	391 and it belongs to basic block BB.
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	392
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	393 PHI is not if-convertible if:
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	394 - it has more than 2 arguments.
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	395
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	396 When the flag_tree_loop_if_convert_stores is not set, PHI 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	397 if-convertible if:
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	398 - a virtual PHI is immediately used in another PHI node,
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	399 - there is a virtual PHI in a BB other than the loop->header. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	400
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	401 static bool
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	402 if_convertible_phi_p (struct loop *loop, basic_block bb, gimple phi)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	403 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	404 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	405 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	406 fprintf (dump_file, "-------------------------\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	407 print_gimple_stmt (dump_file, phi, 0, TDF_SLIM);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	408 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	409
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	410 if (bb != loop->header && gimple_phi_num_args (phi) != 2)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	411 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	412 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	413 fprintf (dump_file, "More than two phi node args.\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	414 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	415 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	416
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	417 if (flag_tree_loop_if_convert_stores)
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	418 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	419
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	420 /* When the flag_tree_loop_if_convert_stores is not set, check
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	421 that there are no memory writes in the branches of the loop to be
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	422 if-converted. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	423 if (!is_gimple_reg (SSA_NAME_VAR (gimple_phi_result (phi))))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	424 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	425 imm_use_iterator imm_iter;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	426 use_operand_p use_p;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	427
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	428 if (bb != loop->header)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	429 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	430 if (dump_file && (dump_flags & TDF_DETAILS))
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	431 fprintf (dump_file, "Virtual phi not on loop->header.\n");
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	432 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	433 }
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	434
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	435 FOR_EACH_IMM_USE_FAST (use_p, imm_iter, gimple_phi_result (phi))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	436 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	437 if (gimple_code (USE_STMT (use_p)) == GIMPLE_PHI)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	438 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	439 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	440 fprintf (dump_file, "Difficult to handle this virtual phi.\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	441 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	442 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	443 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	444 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	445
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	446 return true;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	447 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	448
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	449 /* Records the status of a data reference. This struct is attached to
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	450 each DR->aux field. */
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	451
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	452 struct ifc_dr {
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	453 /* -1 when not initialized, 0 when false, 1 when 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	454 int written_at_least_once;
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	455
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	456 /* -1 when not initialized, 0 when false, 1 when 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	457 int rw_unconditionally;
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	458 };
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	459
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	460 #define IFC_DR(DR) ((struct ifc_dr *) (DR)->aux)
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	461 #define DR_WRITTEN_AT_LEAST_ONCE(DR) (IFC_DR (DR)->written_at_least_once)
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	462 #define DR_RW_UNCONDITIONALLY(DR) (IFC_DR (DR)->rw_unconditionally)
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	463
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	464 /* Returns true when the memory references of STMT are read or written
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	465 unconditionally. In other words, this function returns true when
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	466 for every data reference A in STMT there exist other accesses to
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	467 the same data reference with predicates that add up (OR-up) to 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	468 true predicate: this ensures that the data reference A is touched
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	469 (read or written) on every iteration of the if-converted loop. */
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	470
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	471 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	472 memrefs_read_or_written_unconditionally (gimple 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	473 VEC (data_reference_p, heap) *drs)
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	474 {
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	475 int i, j;
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	476 data_reference_p a, b;
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	477 tree ca = bb_predicate (gimple_bb (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	478
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	479 for (i = 0; VEC_iterate (data_reference_p, drs, i, a); 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	480 if (DR_STMT (a) == 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	481 {
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	482 bool found = 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	483 int x = DR_RW_UNCONDITIONALLY (a);
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	484
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	485 if (x == 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	486 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	487
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	488 if (x == 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	489 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	490
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	491 for (j = 0; VEC_iterate (data_reference_p, drs, j, b); j++)
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	492 if (DR_STMT (b) != 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	493 && same_data_refs (a, b))
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	494 {
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 tree cb = bb_predicate (gimple_bb (DR_STMT (b)));
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 (DR_RW_UNCONDITIONALLY (b) == 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	498 \|\| is_true_predicate (cb)
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 \|\| is_true_predicate (ca = fold_or_predicates (EXPR_LOCATION (cb),
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 ca, cb)))
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 DR_RW_UNCONDITIONALLY (a) = 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	503 DR_RW_UNCONDITIONALLY (b) = 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	504 found = 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	505 break;
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	506 }
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 }
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	508
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	509 if (!found)
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	510 {
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	511 DR_RW_UNCONDITIONALLY (a) = 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	512 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	513 }
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
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 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	517 }
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
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 /* Returns true when the memory references of STMT are unconditionally
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 written. In other words, this function returns true when for every
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 data reference A written in STMT, there exist other writes to 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	522 same data reference with predicates that add up (OR-up) to the 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	523 predicate: this ensures that the data reference A is written on
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	524 every iteration of the if-converted loop. */
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	525
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	526 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	527 write_memrefs_written_at_least_once (gimple 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	528 VEC (data_reference_p, heap) *drs)
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	529 {
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	530 int i, j;
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	531 data_reference_p a, b;
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	532 tree ca = bb_predicate (gimple_bb (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	533
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	534 for (i = 0; VEC_iterate (data_reference_p, drs, i, a); 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	535 if (DR_STMT (a) == 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	536 && DR_IS_WRITE (a))
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	537 {
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	538 bool found = 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	539 int x = DR_WRITTEN_AT_LEAST_ONCE (a);
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	540
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	541 if (x == 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	542 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	543
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	544 if (x == 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	545 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	546
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	547 for (j = 0; VEC_iterate (data_reference_p, drs, j, b); j++)
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	548 if (DR_STMT (b) != 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	549 && DR_IS_WRITE (b)
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	550 && same_data_refs_base_objects (a, b))
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	551 {
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	552 tree cb = bb_predicate (gimple_bb (DR_STMT (b)));
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	553
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	554 if (DR_WRITTEN_AT_LEAST_ONCE (b) == 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	555 \|\| is_true_predicate (cb)
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	556 \|\| is_true_predicate (ca = fold_or_predicates (EXPR_LOCATION (cb),
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	557 ca, cb)))
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	558 {
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	559 DR_WRITTEN_AT_LEAST_ONCE (a) = 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	560 DR_WRITTEN_AT_LEAST_ONCE (b) = 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	561 found = 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	562 break;
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	563 }
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	564 }
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	565
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	566 if (!found)
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	567 {
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	568 DR_WRITTEN_AT_LEAST_ONCE (a) = 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	569 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	570 }
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	571 }
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	572
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	573 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	574 }
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	575
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	576 /* Return true when the memory references of STMT won't trap in 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	577 if-converted code. There are two things that we have to check for:
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	578
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	579 - writes to memory occur to writable memory: if-conversion of
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	580 memory writes transforms the conditional memory writes into
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	581 unconditional writes, i.e. "if (cond) A[i] = foo" is transformed
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	582 into "A[i] = cond ? foo : A[i]", and as the write to memory may 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	583 be executed at all in the original code, it may be a readonly
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	584 memory. To check that A is not const-qualified, we check 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	585 there exists at least an unconditional write to A in the current
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	586 function.
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	587
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	588 - reads or writes to memory are valid memory accesses for every
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	589 iteration. To check that the memory accesses are correctly formed
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	590 and that we are allowed to read and write in these locations, we
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	591 check that the memory accesses to be if-converted occur at every
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	592 iteration unconditionally. */
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	593
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	594 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	595 ifcvt_memrefs_wont_trap (gimple stmt, VEC (data_reference_p, heap) *refs)
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	596 {
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	597 return write_memrefs_written_at_least_once (stmt, refs)
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	598 && memrefs_read_or_written_unconditionally (stmt, refs);
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	599 }
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	600
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	601 /* Wrapper around gimple_could_trap_p refined for the needs 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	602 if-conversion. Try to prove that the memory accesses of STMT could
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	603 not trap in the innermost loop containing 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	604
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	605 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	606 ifcvt_could_trap_p (gimple stmt, VEC (data_reference_p, heap) *refs)
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	607 {
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	608 if (gimple_vuse (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	609 && !gimple_could_trap_p_1 (stmt, false, 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	610 && ifcvt_memrefs_wont_trap (stmt, refs))
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	611 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	612
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	613 return gimple_could_trap_p (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	614 }
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	615
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	616 /* Return true when STMT is if-convertible.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	617
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	618 GIMPLE_ASSIGN statement is not if-convertible if,
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	619 - it is not movable,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	620 - it could trap,
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	621 - LHS is not var decl. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	622
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	623 static bool
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	624 if_convertible_gimple_assign_stmt_p (gimple 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	625 VEC (data_reference_p, heap) *refs)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	626 {
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	627 tree lhs = gimple_assign_lhs (stmt);
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	628 basic_block bb;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	629
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	630 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	631 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	632 fprintf (dump_file, "-------------------------\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	633 print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	634 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	635
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	636 if (!is_gimple_reg_type (TREE_TYPE (lhs)))
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	637 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	638
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	639 /* Some of these constrains might be too conservative. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	640 if (stmt_ends_bb_p (stmt)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	641 \|\| gimple_has_volatile_ops (stmt)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	642 \|\| (TREE_CODE (lhs) == SSA_NAME
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	643 && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (lhs))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	644 \|\| gimple_has_side_effects (stmt))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	645 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	646 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	647 fprintf (dump_file, "stmt not suitable for ifcvt\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	648 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	649 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	650
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	651 if (flag_tree_loop_if_convert_stores)
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	652 {
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	653 if (ifcvt_could_trap_p (stmt, refs))
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	654 {
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	655 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	656 fprintf (dump_file, "tree could trap...\n");
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	657 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	658 }
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	659 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	660 }
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	661
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	662 if (gimple_assign_rhs_could_trap_p (stmt))
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	663 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	664 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	665 fprintf (dump_file, "tree could trap...\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	666 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	667 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	668
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	669 bb = gimple_bb (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	670
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	671 if (TREE_CODE (lhs) != SSA_NAME
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	672 && bb != bb->loop_father->header
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	673 && !bb_with_exit_edge_p (bb->loop_father, bb))
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	674 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	675 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	676 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	677 fprintf (dump_file, "LHS is not var\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	678 print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	679 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	680 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	681 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	682
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	683 return true;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	684 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	685
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	686 /* Return true when STMT is if-convertible.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	687
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	688 A statement is if-convertible if:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	689 - it is an if-convertible GIMPLE_ASSGIN,
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	690 - it is a GIMPLE_LABEL or a GIMPLE_COND. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	691
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	692 static bool
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	693 if_convertible_stmt_p (gimple stmt, VEC (data_reference_p, heap) *refs)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	694 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	695 switch (gimple_code (stmt))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	696 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	697 case GIMPLE_LABEL:
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	698 case GIMPLE_DEBUG:
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	699 case GIMPLE_COND:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	700 return true;
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	701
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	702 case GIMPLE_ASSIGN:
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	703 return if_convertible_gimple_assign_stmt_p (stmt, refs);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	704
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	705 default:
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	706 /* Don't know what to do with 'em so don't do anything. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	707 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	708 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	709 fprintf (dump_file, "don't know what to do\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	710 print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	711 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	712 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	713 break;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	714 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	715
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	716 return true;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	717 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	718
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	719 /* Return true when BB post-dominates all its predecessors. */
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	720
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	721 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	722 bb_postdominates_preds (basic_block bb)
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	723 {
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	724 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	725
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	726 for (i = 0; i < EDGE_COUNT (bb->preds); 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	727 if (!dominated_by_p (CDI_POST_DOMINATORS, EDGE_PRED (bb, i)->src, bb))
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	728 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	729
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	730 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	731 }
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	732
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	733 /* Return true when BB is if-convertible. This routine does not check
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	734 basic block's statements and phis.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	735
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	736 A basic block is not if-convertible if:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	737 - it is non-empty and it is after the exit block (in BFS order),
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	738 - it is after the exit block but before the latch,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	739 - its edges are not normal.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	740
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	741 EXIT_BB is the basic block containing the exit of the LOOP. BB is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	742 inside LOOP. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	743
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	744 static bool
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	745 if_convertible_bb_p (struct loop *loop, basic_block bb, basic_block exit_bb)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	746 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	747 edge e;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	748 edge_iterator ei;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	749
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	750 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	751 fprintf (dump_file, "----------[%d]-------------\n", bb->index);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	752
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	753 if (EDGE_COUNT (bb->preds) > 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	754 \|\| EDGE_COUNT (bb->succs) > 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	755 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	756
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	757 if (exit_bb)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	758 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	759 if (bb != loop->latch)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	760 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	761 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	762 fprintf (dump_file, "basic block after exit bb but before latch\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	763 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	764 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	765 else if (!empty_block_p (bb))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	766 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	767 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	768 fprintf (dump_file, "non empty basic block after exit bb\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	769 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	770 }
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	771 else if (bb == loop->latch
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	772 && bb != exit_bb
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	773 && !dominated_by_p (CDI_DOMINATORS, bb, exit_bb))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	774 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	775 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	776 fprintf (dump_file, "latch is not dominated by exit_block\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	777 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	778 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	779 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	780
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	781 /* Be less adventurous and handle only normal edges. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	782 FOR_EACH_EDGE (e, ei, bb->succs)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	783 if (e->flags &
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	784 (EDGE_ABNORMAL_CALL \| EDGE_EH \| EDGE_ABNORMAL \| EDGE_IRREDUCIBLE_LOOP))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	785 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	786 if (dump_file && (dump_flags & TDF_DETAILS))
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	787 fprintf (dump_file, "Difficult to handle edges\n");
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	788 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	789 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	790
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	791 if (EDGE_COUNT (bb->preds) == 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	792 && bb != loop->header
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 && !bb_postdominates_preds (bb))
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 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	795
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	796 return true;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	797 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	798
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	799 /* Return true when all predecessor blocks of BB are visited. The
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	800 VISITED bitmap keeps track of the visited blocks. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	801
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	802 static bool
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	803 pred_blocks_visited_p (basic_block bb, bitmap *visited)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	804 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	805 edge e;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	806 edge_iterator ei;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	807 FOR_EACH_EDGE (e, ei, bb->preds)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	808 if (!bitmap_bit_p (*visited, e->src->index))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	809 return false;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	810
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	811 return true;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	812 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	813
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	814 /* Get body of a LOOP in suitable order for if-conversion. It is
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	815 caller's responsibility to deallocate basic block list.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	816 If-conversion suitable order is, breadth first sort (BFS) order
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	817 with an additional constraint: select a block only if all its
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	818 predecessors are already selected. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	819
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	820 static basic_block *
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	821 get_loop_body_in_if_conv_order (const struct loop *loop)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	822 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	823 basic_block blocks, blocks_in_bfs_order;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	824 basic_block bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	825 bitmap visited;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	826 unsigned int index = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	827 unsigned int visited_count = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	828
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	829 gcc_assert (loop->num_nodes);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	830 gcc_assert (loop->latch != EXIT_BLOCK_PTR);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	831
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	832 blocks = XCNEWVEC (basic_block, loop->num_nodes);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	833 visited = BITMAP_ALLOC (NULL);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	834
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	835 blocks_in_bfs_order = get_loop_body_in_bfs_order (loop);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	836
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	837 index = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	838 while (index < loop->num_nodes)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	839 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	840 bb = blocks_in_bfs_order [index];
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	841
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	842 if (bb->flags & BB_IRREDUCIBLE_LOOP)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	843 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	844 free (blocks_in_bfs_order);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	845 BITMAP_FREE (visited);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	846 free (blocks);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	847 return NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	848 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	849
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	850 if (!bitmap_bit_p (visited, bb->index))
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	851 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	852 if (pred_blocks_visited_p (bb, &visited)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	853 \|\| bb == loop->header)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	854 {
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	855 /* This block is now visited. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	856 bitmap_set_bit (visited, bb->index);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	857 blocks[visited_count++] = bb;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	858 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	859 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	860
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	861 index++;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	862
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	863 if (index == loop->num_nodes
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	864 && visited_count != loop->num_nodes)
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	865 /* Not done yet. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	866 index = 0;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	867 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	868 free (blocks_in_bfs_order);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	869 BITMAP_FREE (visited);
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	870 return blocks;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	871 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	872
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	873 /* Returns true when the analysis of the predicates for all the basic
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 blocks in LOOP succeeded.
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
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 predicate_bbs first allocates the predicates of the basic blocks.
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 These fields are then initialized with the tree expressions
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 representing the predicates under which a basic block is executed
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 in the LOOP. As the loop->header is executed at each iteration, it
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 has the "true" predicate. Other statements executed under a
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 condition are predicated with that condition, for example
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
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 \| if (x)
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 \| S1;
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 \| 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	886 \| S2;
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 S1 will be predicated with "x", 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	889 S2 will be predicated with "!x". */
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 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	892 predicate_bbs (loop_p loop)
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 {
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 unsigned 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	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 for (i = 0; i < loop->num_nodes; 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 init_bb_predicate (ifc_bbs[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	898
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 for (i = 0; i < loop->num_nodes; 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	900 {
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 basic_block bb = ifc_bbs[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	902 tree cond;
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 gimple_stmt_iterator itr;
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
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 /* The loop latch is always executed and has no extra conditions
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 to be processed: skip it. */
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 if (bb == loop->latch)
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 {
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 reset_bb_predicate (loop->latch);
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 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	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
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 cond = bb_predicate (bb);
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 if (cond
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 && bb != loop->header)
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 gimple_seq stmts;
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 cond = force_gimple_operand (cond, &stmts, true, NULL_TREE);
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	920 add_bb_predicate_gimplified_stmts (bb, stmts);
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	921 }
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	922
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	923 for (itr = gsi_start_bb (bb); !gsi_end_p (itr); gsi_next (&itr))
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	924 {
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	925 gimple stmt = gsi_stmt (itr);
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	926
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	927 switch (gimple_code (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	928 {
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	929 case GIMPLE_LABEL:
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	930 case GIMPLE_ASSIGN:
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	931 case GIMPLE_CALL:
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	932 case GIMPLE_DEBUG:
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	933 break;
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	934
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	935 case GIMPLE_COND:
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	936 {
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	937 tree c2, tem;
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	938 edge true_edge, false_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	939 location_t loc = gimple_location (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	940 tree c = fold_build2_loc (loc, gimple_cond_code (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	941 boolean_type_node,
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	942 gimple_cond_lhs (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	943 gimple_cond_rhs (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	944
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	945 /* Add new condition into destination's predicate 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	946 extract_true_false_edges_from_block (gimple_bb (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	947 &true_edge, &false_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	948
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	949 /* If C is true, then TRUE_EDGE is taken. */
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	950 add_to_dst_predicate_list (loop, true_edge, cond, unshare_expr (c));
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	951
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	952 /* If C is false, then FALSE_EDGE is taken. */
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	953 c2 = invert_truthvalue_loc (loc, unshare_expr (c));
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	954 tem = canonicalize_cond_expr_cond (c2);
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	955 if (tem)
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	956 c2 = tem;
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	957 add_to_dst_predicate_list (loop, false_edge, cond, c2);
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	958
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	959 cond = NULL_TREE;
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	960 break;
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	961 }
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	962
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	963 default:
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	964 /* Not handled yet in if-conversion. */
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	965 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	966 }
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	967 }
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	968
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	969 /* If current bb has only one successor, then consider it as an
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	970 unconditional goto. */
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	971 if (single_succ_p (bb))
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	972 {
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	973 basic_block bb_n = single_succ (bb);
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	974
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	975 /* The successor bb inherits the predicate of its
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	976 predecessor. If there is no predicate in the predecessor
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	977 bb, then consider the successor bb as always executed. */
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	978 if (cond == NULL_TREE)
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	979 cond = boolean_true_node;
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	980
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	981 add_to_predicate_list (bb_n, cond);
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	982 }
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	983 }
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	984
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	985 /* The loop header is always executed. */
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	986 reset_bb_predicate (loop->header);
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	987 gcc_assert (bb_predicate_gimplified_stmts (loop->header) == 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	988 && bb_predicate_gimplified_stmts (loop->latch) == 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	989
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	990 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	991 }
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	992
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	993 /* Return true when LOOP is if-convertible. This is a helper function
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	994 for if_convertible_loop_p. REFS and DDRS are initialized and freed
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	995 in if_convertible_loop_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	996
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	997 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	998 if_convertible_loop_p_1 (struct loop *loop,
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	999 VEC (loop_p, heap) **loop_nest,
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	1000 VEC (data_reference_p, heap) **refs,
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	1001 VEC (ddr_p, heap) **ddrs)
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	1002 {
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	1003 bool res;
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	1004 unsigned 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	1005 basic_block exit_bb = 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	1006
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	1007 /* Don't if-convert the loop when the data dependences cannot be
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 computed: the loop won't be vectorized in that case. */
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 res = compute_data_dependences_for_loop (loop, true, loop_nest, refs, ddrs);
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	1010 if (!res)
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	1011 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	1012
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	1013 calculate_dominance_info (CDI_DOMINATORS);
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	1014 calculate_dominance_info (CDI_POST_DOMINATORS);
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	1015
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	1016 /* Allow statements that can be handled during if-conversion. */
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	1017 ifc_bbs = get_loop_body_in_if_conv_order (loop);
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	1018 if (!ifc_bbs)
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	1019 {
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	1020 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	1021 fprintf (dump_file, "Irreducible loop\n");
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	1022 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	1023 }
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	1024
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	1025 for (i = 0; i < loop->num_nodes; 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	1026 {
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	1027 basic_block bb = ifc_bbs[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	1028
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	1029 if (!if_convertible_bb_p (loop, bb, exit_bb))
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	1030 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	1031
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	1032 if (bb_with_exit_edge_p (loop, bb))
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	1033 exit_bb = bb;
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	1034 }
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	1035
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	1036 res = predicate_bbs (loop);
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	1037 if (!res)
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	1038 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	1039
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	1040 if (flag_tree_loop_if_convert_stores)
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	1041 {
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	1042 data_reference_p dr;
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	1043
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	1044 for (i = 0; VEC_iterate (data_reference_p, *refs, i, dr); 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	1045 {
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	1046 dr->aux = XNEW (struct ifc_dr);
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	1047 DR_WRITTEN_AT_LEAST_ONCE (dr) = -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	1048 DR_RW_UNCONDITIONALLY (dr) = -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	1049 }
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	1050 }
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	1051
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	1052 for (i = 0; i < loop->num_nodes; 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	1053 {
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	1054 basic_block bb = ifc_bbs[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	1055 gimple_stmt_iterator itr;
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	1056
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	1057 for (itr = gsi_start_phis (bb); !gsi_end_p (itr); gsi_next (&itr))
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	1058 if (!if_convertible_phi_p (loop, bb, gsi_stmt (itr)))
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	1059 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	1060
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	1061 /* Check the if-convertibility of statements in predicated BBs. */
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	1062 if (is_predicated (bb))
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	1063 for (itr = gsi_start_bb (bb); !gsi_end_p (itr); gsi_next (&itr))
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	1064 if (!if_convertible_stmt_p (gsi_stmt (itr), *refs))
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	1065 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	1066 }
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	1067
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	1068 if (dump_file)
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	1069 fprintf (dump_file, "Applying if-conversion\n");
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	1070
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	1071 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	1072 }
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
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1074 /* Return true when LOOP is if-convertible.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1075 LOOP is if-convertible if:
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1076 - it is innermost,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1077 - it has two or more basic blocks,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1078 - it has only one exit,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1079 - loop header is not the exit edge,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1080 - if its basic blocks and phi nodes are if convertible. */
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1081
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1082 static bool
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1083 if_convertible_loop_p (struct loop *loop)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1084 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1085 edge e;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1086 edge_iterator ei;
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	1087 bool res = 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	1088 VEC (data_reference_p, heap) *refs;
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	1089 VEC (ddr_p, heap) *ddrs;
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	1090 VEC (loop_p, heap) *loop_nest;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1091
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	1092 /* Handle only innermost loop. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1093 if (!loop \|\| loop->inner)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1094 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1095 if (dump_file && (dump_flags & TDF_DETAILS))
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	1096 fprintf (dump_file, "not innermost loop\n");
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1097 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1098 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1099
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1100 /* If only one block, no need for if-conversion. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1101 if (loop->num_nodes <= 2)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1102 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1103 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1104 fprintf (dump_file, "less than 2 basic blocks\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1105 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1106 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1107
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1108 /* More than one loop exit is too much to handle. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1109 if (!single_exit (loop))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1110 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1111 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1112 fprintf (dump_file, "multiple exits\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1113 return false;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1114 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1115
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	1116 /* If one of the loop header's edge is an exit edge then do 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	1117 apply if-conversion. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1118 FOR_EACH_EDGE (e, ei, loop->header->succs)
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	1119 if (loop_exit_edge_p (loop, e))
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	1120 return false;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1121
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	1122 refs = VEC_alloc (data_reference_p, heap, 5);
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	1123 ddrs = VEC_alloc (ddr_p, heap, 25);
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	1124 loop_nest = VEC_alloc (loop_p, heap, 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	1125 res = if_convertible_loop_p_1 (loop, &loop_nest, &refs, &ddrs);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1126
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	1127 if (flag_tree_loop_if_convert_stores)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1128 {
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	1129 data_reference_p dr;
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	1130 unsigned 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	1131
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	1132 for (i = 0; VEC_iterate (data_reference_p, refs, i, dr); 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	1133 free (dr->aux);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1134 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1135
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	1136 VEC_free (loop_p, heap, loop_nest);
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	1137 free_data_refs (refs);
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	1138 free_dependence_relations (ddrs);
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	1139 return res;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1140 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1141
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	1142 /* Basic block BB has two predecessors. Using predecessor's bb
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	1143 predicate, set an appropriate condition COND for the PHI node
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	1144 replacement. Return the true block whose phi arguments are
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	1145 selected when cond is true. LOOP is the loop containing 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	1146 if-converted region, GSI is the place to insert the code for 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	1147 if-conversion. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1148
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1149 static basic_block
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	1150 find_phi_replacement_condition (struct loop *loop,
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1151 basic_block bb, tree *cond,
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	1152 gimple_stmt_iterator *gsi)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1153 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1154 edge first_edge, second_edge;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1155 tree tmp_cond;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1156
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1157 gcc_assert (EDGE_COUNT (bb->preds) == 2);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1158 first_edge = EDGE_PRED (bb, 0);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1159 second_edge = EDGE_PRED (bb, 1);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1160
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1161 /* Use condition based on following criteria:
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1162 1)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1163 S1: x = !c ? a : b;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1164
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1165 S2: x = c ? b : a;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1166
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1167 S2 is preferred over S1. Make 'b' first_bb and use its condition.
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	1168
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1169 2) Do not make loop header first_bb.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1170
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1171 3)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1172 S1: x = !(c == d)? a : b;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1173
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1174 S21: t1 = c == d;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1175 S22: x = t1 ? b : a;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1176
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1177 S3: x = (c == d) ? b : a;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1178
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	1179 S3 is preferred over S1 and S2*, Make 'b' first_bb and use
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1180 its condition.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1181
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1182 4) If pred B is dominated by pred A then use pred B's condition.
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1183 See PR23115. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1184
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1185 /* Select condition that is not TRUTH_NOT_EXPR. */
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	1186 tmp_cond = bb_predicate (first_edge->src);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1187 gcc_assert (tmp_cond);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1188
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1189 if (TREE_CODE (tmp_cond) == TRUTH_NOT_EXPR)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1190 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1191 edge tmp_edge;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1192
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1193 tmp_edge = first_edge;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1194 first_edge = second_edge;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1195 second_edge = tmp_edge;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1196 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1197
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1198 /* Check if FIRST_BB is loop header or not and make sure that
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1199 FIRST_BB does not dominate SECOND_BB. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1200 if (first_edge->src == loop->header
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1201 \|\| dominated_by_p (CDI_DOMINATORS,
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1202 second_edge->src, first_edge->src))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1203 {
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	1204 *cond = bb_predicate (second_edge->src);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1205
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1206 if (TREE_CODE (*cond) == TRUTH_NOT_EXPR)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1207 cond = invert_truthvalue (cond);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1208 else
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1209 /* Select non loop header bb. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1210 first_edge = second_edge;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1211 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1212 else
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	1213 *cond = bb_predicate (first_edge->src);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1214
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1215 /* Gimplify the condition: the vectorizer prefers to have gimple
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1216 values as conditions. Various targets use different means to
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1217 communicate conditions in vector compare operations. Using a
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1218 gimple value allows the compiler to emit vector compare and
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1219 select RTL without exposing compare's result. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1220 cond = force_gimple_operand_gsi (gsi, unshare_expr (cond),
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1221 false, NULL_TREE,
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1222 true, GSI_SAME_STMT);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1223 if (!is_gimple_reg (cond) && !is_gimple_condexpr (cond))
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	1224 cond = ifc_temp_var (TREE_TYPE (cond), unshare_expr (*cond), gsi);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1225
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1226 gcc_assert (*cond);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1227
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1228 return first_edge->src;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1229 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1230
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	1231 /* Replace a scalar PHI node with a COND_EXPR using COND as condition.
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	1232 This routine does not handle PHI nodes with more than two
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	1233 arguments.
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1234
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1235 For example,
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1236 S1: A = PHI <x1(1), x2(5)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1237 is converted into,
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1238 S2: A = cond ? x1 : x2;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1239
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1240 The generated code is inserted at GSI that points to the top of
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1241 basic block's statement list. When COND is true, phi arg from
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1242 TRUE_BB is selected. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1243
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1244 static void
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	1245 predicate_scalar_phi (gimple phi, tree cond,
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	1246 basic_block true_bb,
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	1247 gimple_stmt_iterator *gsi)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1248 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1249 gimple new_stmt;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1250 basic_block bb;
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	1251 tree rhs, res, arg, scev;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1252
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1253 gcc_assert (gimple_code (phi) == GIMPLE_PHI
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1254 && gimple_phi_num_args (phi) == 2);
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	1255
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	1256 res = gimple_phi_result (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	1257 /* Do not handle virtual phi nodes. */
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	1258 if (!is_gimple_reg (SSA_NAME_VAR (res)))
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	1259 return;
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	1260
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1261 bb = gimple_bb (phi);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1262
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	1263 if ((arg = degenerate_phi_result (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	1264 \|\| ((scev = analyze_scalar_evolution (gimple_bb (phi)->loop_father,
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	1265 res))
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	1266 && !chrec_contains_undetermined (scev)
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	1267 && scev != res
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	1268 && (arg = gimple_phi_arg_def (phi, 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	1269 rhs = arg;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1270 else
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1271 {
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	1272 tree arg_0, arg_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	1273 /* Use condition that is not TRUTH_NOT_EXPR in conditional modify expr. */
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	1274 if (EDGE_PRED (bb, 1)->src == true_bb)
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	1275 {
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	1276 arg_0 = gimple_phi_arg_def (phi, 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	1277 arg_1 = gimple_phi_arg_def (phi, 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	1278 }
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	1279 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	1280 {
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	1281 arg_0 = gimple_phi_arg_def (phi, 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	1282 arg_1 = gimple_phi_arg_def (phi, 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	1283 }
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	1284
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	1285 gcc_checking_assert (bb == bb->loop_father->header
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	1286 \|\| bb_postdominates_preds (bb));
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	1287
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	1288 /* Build new RHS using selected condition and arguments. */
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	1289 rhs = build3 (COND_EXPR, TREE_TYPE (res),
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	1290 unshare_expr (cond), arg_0, arg_1);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1291 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1292
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	1293 new_stmt = gimple_build_assign (res, rhs);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1294 SSA_NAME_DEF_STMT (gimple_phi_result (phi)) = new_stmt;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1295 gsi_insert_before (gsi, new_stmt, GSI_SAME_STMT);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1296 update_stmt (new_stmt);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1297
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1298 if (dump_file && (dump_flags & TDF_DETAILS))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1299 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1300 fprintf (dump_file, "new phi replacement stmt\n");
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1301 print_gimple_stmt (dump_file, new_stmt, 0, TDF_SLIM);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1302 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1303 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1304
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	1305 /* Replaces in LOOP all the scalar phi nodes other than those in 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	1306 LOOP->header block with conditional modify expressions. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1307
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1308 static void
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	1309 predicate_all_scalar_phis (struct loop *loop)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1310 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1311 basic_block bb;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1312 unsigned int orig_loop_num_nodes = loop->num_nodes;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1313 unsigned int i;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1314
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1315 for (i = 1; i < orig_loop_num_nodes; i++)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1316 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1317 gimple phi;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1318 tree cond = NULL_TREE;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1319 gimple_stmt_iterator gsi, phi_gsi;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1320 basic_block true_bb = NULL;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1321 bb = ifc_bbs[i];
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1322
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1323 if (bb == loop->header)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1324 continue;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1325
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1326 phi_gsi = gsi_start_phis (bb);
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	1327 if (gsi_end_p (phi_gsi))
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	1328 continue;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1329
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1330 /* BB has two predecessors. Using predecessor's aux field, set
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1331 appropriate condition for the PHI node replacement. */
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	1332 gsi = gsi_after_labels (bb);
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	1333 true_bb = find_phi_replacement_condition (loop, bb, &cond, &gsi);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1334
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1335 while (!gsi_end_p (phi_gsi))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1336 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1337 phi = gsi_stmt (phi_gsi);
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	1338 predicate_scalar_phi (phi, cond, true_bb, &gsi);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1339 release_phi_node (phi);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1340 gsi_next (&phi_gsi);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1341 }
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	1342
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1343 set_phi_nodes (bb, NULL);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1344 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1345 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1346
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	1347 /* Insert in each basic block of LOOP the statements produced by 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	1348 gimplification of the predicates. */
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	1349
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	1350 static void
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	1351 insert_gimplified_predicates (loop_p loop)
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	1352 {
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	1353 unsigned 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	1354
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	1355 for (i = 0; i < loop->num_nodes; 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	1356 {
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	1357 basic_block bb = ifc_bbs[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	1358 gimple_seq stmts;
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	1359
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	1360 if (!is_predicated (bb))
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	1361 {
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	1362 /* Do not insert statements for a basic block that 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	1363 predicated. Also make sure that the predicate 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	1364 basic block is set to 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	1365 reset_bb_predicate (bb);
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	1366 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	1367 }
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	1368
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	1369 stmts = bb_predicate_gimplified_stmts (bb);
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	1370 if (stmts)
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	1371 {
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	1372 if (flag_tree_loop_if_convert_stores)
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	1373 {
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	1374 /* Insert the predicate of the BB just after the label,
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	1375 as the if-conversion of memory writes will use this
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	1376 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	1377 gimple_stmt_iterator gsi = gsi_after_labels (bb);
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	1378 gsi_insert_seq_before (&gsi, stmts, GSI_SAME_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	1379 }
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	1380 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	1381 {
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	1382 /* Insert the predicate of the BB at the end of the BB
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	1383 as this would reduce the register pressure: the only
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	1384 use of this predicate will be in successor BBs. */
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	1385 gimple_stmt_iterator gsi = gsi_last_bb (bb);
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	1386
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	1387 if (gsi_end_p (gsi)
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	1388 \|\| stmt_ends_bb_p (gsi_stmt (gsi)))
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	1389 gsi_insert_seq_before (&gsi, stmts, GSI_SAME_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	1390 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	1391 gsi_insert_seq_after (&gsi, stmts, GSI_SAME_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	1392 }
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	1393
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	1394 /* Once the sequence is code generated, set it to 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	1395 set_bb_predicate_gimplified_stmts (bb, 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	1396 }
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	1397 }
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	1398 }
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	1399
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	1400 /* Predicate each write to memory in LOOP.
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	1401
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	1402 This function transforms control flow constructs containing memory
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	1403 writes of the form:
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	1404
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	1405 \| for (i = 0; i < N; 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	1406 \| if (cond)
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	1407 \| A[i] = expr;
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	1408
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	1409 into the following form that does not contain control flow:
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	1410
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	1411 \| for (i = 0; i < N; 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	1412 \| A[i] = cond ? expr : A[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	1413
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	1414 The original CFG looks like this:
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	1415
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	1416 \| bb_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	1417 \| i = 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	1418 \| end_bb_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	1419 \|
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	1420 \| bb_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	1421 \| if (i < N) goto bb_5 else goto bb_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	1422 \| end_bb_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	1423 \|
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	1424 \| bb_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	1425 \| cond = some_computation;
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	1426 \| if (cond) goto bb_3 else goto bb_4
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	1427 \| end_bb_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	1428 \|
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	1429 \| bb_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	1430 \| A[i] = expr;
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	1431 \| goto bb_4
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	1432 \| end_bb_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	1433 \|
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	1434 \| bb_4
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	1435 \| goto bb_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	1436 \| end_bb_4
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	1437
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	1438 insert_gimplified_predicates inserts the computation of the COND
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	1439 expression at the beginning of the destination basic block:
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	1440
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	1441 \| bb_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	1442 \| i = 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	1443 \| end_bb_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	1444 \|
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	1445 \| bb_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	1446 \| if (i < N) goto bb_5 else goto bb_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	1447 \| end_bb_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	1448 \|
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	1449 \| bb_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	1450 \| cond = some_computation;
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	1451 \| if (cond) goto bb_3 else goto bb_4
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	1452 \| end_bb_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	1453 \|
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	1454 \| bb_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	1455 \| cond = some_computation;
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	1456 \| A[i] = expr;
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	1457 \| goto bb_4
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	1458 \| end_bb_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	1459 \|
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	1460 \| bb_4
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	1461 \| goto bb_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	1462 \| end_bb_4
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	1463
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	1464 predicate_mem_writes is then predicating the memory write as follows:
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	1465
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	1466 \| bb_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	1467 \| i = 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	1468 \| end_bb_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	1469 \|
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	1470 \| bb_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	1471 \| if (i < N) goto bb_5 else goto bb_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	1472 \| end_bb_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	1473 \|
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	1474 \| bb_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	1475 \| if (cond) goto bb_3 else goto bb_4
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	1476 \| end_bb_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	1477 \|
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	1478 \| bb_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	1479 \| cond = some_computation;
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	1480 \| A[i] = cond ? expr : A[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	1481 \| goto bb_4
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	1482 \| end_bb_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	1483 \|
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	1484 \| bb_4
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	1485 \| goto bb_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	1486 \| end_bb_4
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	1487
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	1488 and finally combine_blocks removes the basic block boundaries making
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	1489 the loop vectorizable:
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	1490
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	1491 \| bb_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	1492 \| i = 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	1493 \| if (i < N) goto bb_5 else goto bb_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	1494 \| end_bb_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	1495 \|
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	1496 \| bb_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	1497 \| cond = some_computation;
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	1498 \| A[i] = cond ? expr : A[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	1499 \| if (i < N) goto bb_5 else goto bb_4
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	1500 \| end_bb_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	1501 \|
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	1502 \| bb_4
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	1503 \| goto bb_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	1504 \| end_bb_4
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	1505 */
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	1506
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	1507 static void
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	1508 predicate_mem_writes (loop_p loop)
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	1509 {
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	1510 unsigned int i, orig_loop_num_nodes = loop->num_nodes;
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	1511
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	1512 for (i = 1; i < orig_loop_num_nodes; 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	1513 {
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	1514 gimple_stmt_iterator gsi;
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	1515 basic_block bb = ifc_bbs[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	1516 tree cond = bb_predicate (bb);
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	1517 gimple 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	1518
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	1519 if (is_true_predicate (cond))
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	1520 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	1521
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	1522 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
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	1523 if ((stmt = gsi_stmt (gsi))
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	1524 && gimple_assign_single_p (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	1525 && gimple_vdef (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	1526 {
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	1527 tree lhs = gimple_assign_lhs (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	1528 tree rhs = gimple_assign_rhs1 (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	1529 tree type = TREE_TYPE (lhs);
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	1530
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	1531 lhs = ifc_temp_var (type, unshare_expr (lhs), &gsi);
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	1532 rhs = ifc_temp_var (type, unshare_expr (rhs), &gsi);
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	1533 rhs = build3 (COND_EXPR, type, unshare_expr (cond), rhs, lhs);
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	1534 gimple_assign_set_rhs1 (stmt, ifc_temp_var (type, rhs, &gsi));
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	1535 update_stmt (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	1536 }
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	1537 }
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	1538 }
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	1539
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	1540 /* Remove all GIMPLE_CONDs and GIMPLE_LABELs of all the basic blocks
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	1541 other than the exit and latch of the LOOP. Also resets 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	1542 GIMPLE_DEBUG information. */
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	1543
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	1544 static void
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	1545 remove_conditions_and_labels (loop_p loop)
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	1546 {
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	1547 gimple_stmt_iterator gsi;
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	1548 unsigned 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	1549
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	1550 for (i = 0; i < loop->num_nodes; 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	1551 {
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	1552 basic_block bb = ifc_bbs[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	1553
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	1554 if (bb_with_exit_edge_p (loop, bb)
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	1555 \|\| bb == loop->latch)
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	1556 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	1557
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	1558 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); )
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	1559 switch (gimple_code (gsi_stmt (gsi)))
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	1560 {
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	1561 case GIMPLE_COND:
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	1562 case GIMPLE_LABEL:
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	1563 gsi_remove (&gsi, 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	1564 break;
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	1565
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	1566 case GIMPLE_DEBUG:
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	1567 /* ??? Should there be conditional GIMPLE_DEBUG_BINDs? */
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	1568 if (gimple_debug_bind_p (gsi_stmt (gsi)))
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	1569 {
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	1570 gimple_debug_bind_reset_value (gsi_stmt (gsi));
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	1571 update_stmt (gsi_stmt (gsi));
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	1572 }
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	1573 gsi_next (&gsi);
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	1574 break;
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	1575
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	1576 default:
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	1577 gsi_next (&gsi);
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	1578 }
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	1579 }
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	1580 }
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	1581
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1582 /* Combine all the basic blocks from LOOP into one or two super basic
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1583 blocks. Replace PHI nodes with conditional modify expressions. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1584
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1585 static void
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1586 combine_blocks (struct loop *loop)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1587 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1588 basic_block bb, exit_bb, merge_target_bb;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1589 unsigned int orig_loop_num_nodes = loop->num_nodes;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1590 unsigned int i;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1591 edge e;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1592 edge_iterator ei;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1593
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	1594 remove_conditions_and_labels (loop);
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	1595 insert_gimplified_predicates (loop);
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	1596 predicate_all_scalar_phis (loop);
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	1597
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	1598 if (flag_tree_loop_if_convert_stores)
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	1599 predicate_mem_writes (loop);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1600
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1601 /* Merge basic blocks: first remove all the edges in the loop,
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1602 except for those from the exit block. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1603 exit_bb = NULL;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1604 for (i = 0; i < orig_loop_num_nodes; i++)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1605 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1606 bb = ifc_bbs[i];
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1607 if (bb_with_exit_edge_p (loop, bb))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1608 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1609 exit_bb = bb;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1610 break;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1611 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1612 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1613 gcc_assert (exit_bb != loop->latch);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1614
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1615 for (i = 1; i < orig_loop_num_nodes; i++)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1616 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1617 bb = ifc_bbs[i];
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1618
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1619 for (ei = ei_start (bb->preds); (e = ei_safe_edge (ei));)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1620 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1621 if (e->src == exit_bb)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1622 ei_next (&ei);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1623 else
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1624 remove_edge (e);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1625 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1626 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1627
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1628 if (exit_bb != NULL)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1629 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1630 if (exit_bb != loop->header)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1631 {
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1632 /* Connect this node to loop header. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1633 make_edge (loop->header, exit_bb, EDGE_FALLTHRU);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1634 set_immediate_dominator (CDI_DOMINATORS, exit_bb, loop->header);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1635 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1636
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1637 /* Redirect non-exit edges to loop->latch. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1638 FOR_EACH_EDGE (e, ei, exit_bb->succs)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1639 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1640 if (!loop_exit_edge_p (loop, e))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1641 redirect_edge_and_branch (e, loop->latch);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1642 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1643 set_immediate_dominator (CDI_DOMINATORS, loop->latch, exit_bb);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1644 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1645 else
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1646 {
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1647 /* If the loop does not have an exit, reconnect header and latch. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1648 make_edge (loop->header, loop->latch, EDGE_FALLTHRU);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1649 set_immediate_dominator (CDI_DOMINATORS, loop->latch, loop->header);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1650 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1651
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1652 merge_target_bb = loop->header;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1653 for (i = 1; i < orig_loop_num_nodes; i++)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1654 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1655 gimple_stmt_iterator gsi;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1656 gimple_stmt_iterator last;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1657
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1658 bb = ifc_bbs[i];
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1659
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1660 if (bb == exit_bb \|\| bb == loop->latch)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1661 continue;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1662
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	1663 /* Make stmts member of loop->header. */
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	1664 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
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	1665 gimple_set_bb (gsi_stmt (gsi), merge_target_bb);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1666
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1667 /* Update stmt list. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1668 last = gsi_last_bb (merge_target_bb);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1669 gsi_insert_seq_after (&last, bb_seq (bb), GSI_NEW_STMT);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1670 set_bb_seq (bb, NULL);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1671
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1672 delete_basic_block (bb);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1673 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1674
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1675 /* If possible, merge loop header to the block with the exit edge.
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1676 This reduces the number of basic blocks to two, to please the
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	1677 vectorizer that handles only loops with two nodes. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1678 if (exit_bb
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1679 && exit_bb != loop->header
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1680 && can_merge_blocks_p (loop->header, exit_bb))
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1681 merge_blocks (loop->header, exit_bb);
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1682 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1683
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	1684 /* If-convert LOOP when it is legal. For the moment this pass has no
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	1685 profitability analysis. Returns true when something changed. */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1686
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1687 static bool
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1688 tree_if_conversion (struct loop *loop)
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1689 {
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	1690 bool changed = false;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1691 ifc_bbs = NULL;
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1692
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	1693 if (!if_convertible_loop_p (loop)
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	1694 \|\| !dbg_cnt (if_conversion_tree))
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	1695 goto cleanup;
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	1696
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	1697 /* Now all statements are if-convertible. Combine all the basic
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	1698 blocks into one huge basic block doing the if-conversion
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	1699 on-the-fly. */
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	1700 combine_blocks (loop);
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	1701
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	1702 if (flag_tree_loop_if_convert_stores)
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	1703 mark_sym_for_renaming (gimple_vop (cfun));
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	1704
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	1705 changed = 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	1706
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 cleanup:
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 if (ifc_bbs)
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1709 {
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	1710 unsigned 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	1711
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	1712 for (i = 0; i < loop->num_nodes; 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	1713 free_bb_predicate (ifc_bbs[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	1714
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 free (ifc_bbs);
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 ifc_bbs = NULL;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1717 }
b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1718
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	1719 return changed;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1720 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1721
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1722 /* Tree if-conversion pass management. */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1723
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1724 static unsigned int
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1725 main_tree_if_conversion (void)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1726 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1727 loop_iterator li;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1728 struct loop *loop;
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 bool changed = 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	1730 unsigned todo = 0;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1731
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1732 if (number_of_loops () <= 1)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1733 return 0;
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1734
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1735 FOR_EACH_LOOP (li, loop, 0)
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 changed \|= tree_if_conversion (loop);
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	1737
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	1738 if (changed)
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	1739 todo \|= TODO_cleanup_cfg;
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1740
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	1741 if (changed && flag_tree_loop_if_convert_stores)
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	1742 todo \|= TODO_update_ssa_only_virtuals;
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
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 free_dominance_info (CDI_POST_DOMINATORS);
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
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 return todo;
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1747 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1748
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	1749 /* Returns true when the if-conversion pass is enabled. */
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	1750
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1751 static bool
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1752 gate_tree_if_conversion (void)
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1753 {
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	1754 return ((flag_tree_vectorize && flag_tree_loop_if_convert != 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	1755 \|\| flag_tree_loop_if_convert == 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	1756 \|\| flag_tree_loop_if_convert_stores == 1);
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1757 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1758
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1759 struct gimple_opt_pass pass_if_conversion =
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1760 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1761 {
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1762 GIMPLE_PASS,
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1763 "ifcvt", /* name */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1764 gate_tree_if_conversion, /* gate */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1765 main_tree_if_conversion, /* execute */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1766 NULL, /* sub */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1767 NULL, /* next */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1768 0, /* static_pass_number */
55 77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	1769 TV_NONE, /* tv_id */
77e2b8dfacca update it from 4.4.3 to 4.5.0 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 0 diff changeset	1770 PROP_cfg \| PROP_ssa, /* properties_required */
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1771 0, /* properties_provided */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1772 0, /* properties_destroyed */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1773 0, /* todo_flags_start */
63 b7f97abdc517 update gcc from gcc-4.5.0 to gcc-4.6 ryoma <e075725@ie.u-ryukyu.ac.jp> parents: 55 diff changeset	1774 TODO_dump_func \| TODO_verify_stmts \| TODO_verify_flow
0 a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1775 /* todo_flags_finish */
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1776 }
a06113de4d67 first commit kent <kent@cr.ie.u-ryukyu.ac.jp> parents: diff changeset	1777 };

Mercurial > hg > CbC > CbC_gcc

annotate gcc/tree-if-conv.c @ 88:f214c1d5b862