Mercurial > hg > CbC > CbC_gcc
annotate gcc/rtlhooks.c @ 120:f93fa5091070
fix conv1.c
author | mir3636 |
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date | Thu, 08 Mar 2018 14:53:42 +0900 |
parents | 04ced10e8804 |
children | 84e7813d76e9 |
rev | line source |
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0 | 1 /* Generic hooks for the RTL middle-end. |
111 | 2 Copyright (C) 2004-2017 Free Software Foundation, Inc. |
0 | 3 |
4 This file is part of GCC. | |
5 | |
6 GCC is free software; you can redistribute it and/or modify it under | |
7 the terms of the GNU General Public License as published by the Free | |
8 Software Foundation; either version 3, or (at your option) any later | |
9 version. | |
10 | |
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 for more details. | |
15 | |
16 You should have received a copy of the GNU General Public License | |
17 along with GCC; see the file COPYING3. If not see | |
18 <http://www.gnu.org/licenses/>. */ | |
19 | |
20 #include "config.h" | |
21 #include "system.h" | |
22 #include "coretypes.h" | |
23 #include "tm.h" | |
111 | 24 #include "function.h" |
0 | 25 #include "rtl.h" |
111 | 26 #include "tree.h" |
27 #include "insn-config.h" | |
28 #include "memmodel.h" | |
29 #include "emit-rtl.h" | |
30 #include "recog.h" | |
0 | 31 #include "rtlhooks-def.h" |
111 | 32 #include "explow.h" |
33 #include "target.h" | |
0 | 34 |
35 | |
36 /* For speed, we will copy the RTX hooks struct member-by-member | |
37 instead of doing indirect calls. For these reason, we initialize | |
38 *two* struct rtl_hooks globals: rtl_hooks is the one that is used | |
39 to actually call the hooks, while general_rtl_hooks is used | |
40 to restore the hooks by passes that modify them. */ | |
41 | |
42 const struct rtl_hooks general_rtl_hooks = RTL_HOOKS_INITIALIZER; | |
43 struct rtl_hooks rtl_hooks = RTL_HOOKS_INITIALIZER; | |
44 | |
45 rtx | |
111 | 46 gen_lowpart_general (machine_mode mode, rtx x) |
0 | 47 { |
48 rtx result = gen_lowpart_common (mode, x); | |
49 | |
50 if (result) | |
51 return result; | |
52 /* Handle SUBREGs and hard REGs that were rejected by | |
53 simplify_gen_subreg. */ | |
54 else if (REG_P (x) || GET_CODE (x) == SUBREG) | |
55 { | |
56 result = gen_lowpart_common (mode, copy_to_reg (x)); | |
57 gcc_assert (result != 0); | |
58 return result; | |
59 } | |
60 else | |
61 { | |
62 /* The only additional case we can do is MEM. */ | |
63 gcc_assert (MEM_P (x)); | |
64 | |
65 /* The following exposes the use of "x" to CSE. */ | |
111 | 66 scalar_int_mode xmode; |
67 if (is_a <scalar_int_mode> (GET_MODE (x), &xmode) | |
68 && GET_MODE_SIZE (xmode) <= UNITS_PER_WORD | |
69 && TRULY_NOOP_TRUNCATION_MODES_P (mode, xmode) | |
0 | 70 && !reload_completed) |
111 | 71 return gen_lowpart_general (mode, force_reg (xmode, x)); |
0 | 72 |
111 | 73 HOST_WIDE_INT offset = byte_lowpart_offset (mode, GET_MODE (x)); |
0 | 74 return adjust_address (x, mode, offset); |
75 } | |
76 } | |
77 | |
78 rtx | |
111 | 79 reg_num_sign_bit_copies_general (const_rtx, scalar_int_mode, scalar_int_mode, |
80 unsigned int *) | |
0 | 81 { |
82 return NULL; | |
83 } | |
84 | |
85 rtx | |
111 | 86 reg_nonzero_bits_general (const_rtx, scalar_int_mode, scalar_int_mode, |
87 unsigned HOST_WIDE_INT *) | |
0 | 88 { |
89 return NULL; | |
90 } | |
91 | |
92 bool | |
111 | 93 reg_truncated_to_mode_general (machine_mode mode ATTRIBUTE_UNUSED, |
0 | 94 const_rtx x ATTRIBUTE_UNUSED) |
95 { | |
96 return false; | |
97 } | |
98 | |
99 /* Assuming that X is an rtx (e.g., MEM, REG or SUBREG) for a fixed-point | |
100 number, return an rtx (MEM, SUBREG, or CONST_INT) that refers to the | |
101 least-significant part of X. | |
102 MODE specifies how big a part of X to return. | |
103 | |
104 If the requested operation cannot be done, 0 is returned. | |
105 | |
106 This is similar to gen_lowpart_general. */ | |
107 | |
108 rtx | |
111 | 109 gen_lowpart_if_possible (machine_mode mode, rtx x) |
0 | 110 { |
111 rtx result = gen_lowpart_common (mode, x); | |
112 | |
113 if (result) | |
114 return result; | |
115 else if (MEM_P (x)) | |
116 { | |
117 /* This is the only other case we handle. */ | |
111 | 118 HOST_WIDE_INT offset = byte_lowpart_offset (mode, GET_MODE (x)); |
119 rtx new_rtx = adjust_address_nv (x, mode, offset); | |
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
120 if (! memory_address_addr_space_p (mode, XEXP (new_rtx, 0), |
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
121 MEM_ADDR_SPACE (x))) |
0 | 122 return 0; |
123 | |
124 return new_rtx; | |
125 } | |
126 else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode | |
127 && validate_subreg (mode, GET_MODE (x), x, | |
128 subreg_lowpart_offset (mode, GET_MODE (x)))) | |
129 return gen_lowpart_SUBREG (mode, x); | |
130 else | |
131 return 0; | |
132 } | |
133 |