Mercurial > hg > CbC > CbC_gcc
annotate gcc/rtlhooks.c @ 58:3aaf117db171
error at dwarf2out.c
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 15 Feb 2010 14:58:24 +0900 |
| parents | 77e2b8dfacca |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Generic hooks for the RTL middle-end. |
| 2 Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc. | |
| 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" | |
| 24 #include "rtl.h" | |
| 25 #include "rtlhooks-def.h" | |
| 26 #include "expr.h" | |
| 27 #include "recog.h" | |
| 28 | |
| 29 | |
| 30 /* For speed, we will copy the RTX hooks struct member-by-member | |
| 31 instead of doing indirect calls. For these reason, we initialize | |
| 32 *two* struct rtl_hooks globals: rtl_hooks is the one that is used | |
| 33 to actually call the hooks, while general_rtl_hooks is used | |
| 34 to restore the hooks by passes that modify them. */ | |
| 35 | |
| 36 const struct rtl_hooks general_rtl_hooks = RTL_HOOKS_INITIALIZER; | |
| 37 struct rtl_hooks rtl_hooks = RTL_HOOKS_INITIALIZER; | |
| 38 | |
| 39 rtx | |
| 40 gen_lowpart_general (enum machine_mode mode, rtx x) | |
| 41 { | |
| 42 rtx result = gen_lowpart_common (mode, x); | |
| 43 | |
| 44 if (result) | |
| 45 return result; | |
| 46 /* Handle SUBREGs and hard REGs that were rejected by | |
| 47 simplify_gen_subreg. */ | |
| 48 else if (REG_P (x) || GET_CODE (x) == SUBREG) | |
| 49 { | |
| 50 result = gen_lowpart_common (mode, copy_to_reg (x)); | |
| 51 gcc_assert (result != 0); | |
| 52 return result; | |
| 53 } | |
| 54 else | |
| 55 { | |
| 56 int offset = 0; | |
| 57 | |
| 58 /* The only additional case we can do is MEM. */ | |
| 59 gcc_assert (MEM_P (x)); | |
| 60 | |
| 61 /* The following exposes the use of "x" to CSE. */ | |
| 62 if (GET_MODE_SIZE (GET_MODE (x)) <= UNITS_PER_WORD | |
| 63 && SCALAR_INT_MODE_P (GET_MODE (x)) | |
| 64 && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), | |
| 65 GET_MODE_BITSIZE (GET_MODE (x))) | |
| 66 && !reload_completed) | |
| 67 return gen_lowpart_general (mode, force_reg (GET_MODE (x), x)); | |
| 68 | |
| 69 if (WORDS_BIG_ENDIAN) | |
| 70 offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD) | |
| 71 - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD)); | |
| 72 | |
| 73 if (BYTES_BIG_ENDIAN) | |
| 74 /* Adjust the address so that the address-after-the-data | |
| 75 is unchanged. */ | |
| 76 offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode)) | |
| 77 - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x)))); | |
| 78 | |
| 79 return adjust_address (x, mode, offset); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 /* Similar to gen_lowpart, but cannot emit any instruction via | |
| 84 copy_to_reg or force_reg. Mainly used in simplify-rtx.c. */ | |
| 85 rtx | |
| 86 gen_lowpart_no_emit_general (enum machine_mode mode, rtx x) | |
| 87 { | |
| 88 rtx result = gen_lowpart_if_possible (mode, x); | |
| 89 if (result) | |
| 90 return result; | |
| 91 else | |
| 92 return x; | |
| 93 } | |
| 94 | |
| 95 rtx | |
| 96 reg_num_sign_bit_copies_general (const_rtx x ATTRIBUTE_UNUSED, | |
| 97 enum machine_mode mode ATTRIBUTE_UNUSED, | |
| 98 const_rtx known_x ATTRIBUTE_UNUSED, | |
| 99 enum machine_mode known_mode ATTRIBUTE_UNUSED, | |
| 100 unsigned int known_ret ATTRIBUTE_UNUSED, | |
| 101 unsigned int *result ATTRIBUTE_UNUSED) | |
| 102 { | |
| 103 return NULL; | |
| 104 } | |
| 105 | |
| 106 rtx | |
| 107 reg_nonzero_bits_general (const_rtx x ATTRIBUTE_UNUSED, | |
| 108 enum machine_mode mode ATTRIBUTE_UNUSED, | |
| 109 const_rtx known_x ATTRIBUTE_UNUSED, | |
| 110 enum machine_mode known_mode ATTRIBUTE_UNUSED, | |
| 111 unsigned HOST_WIDE_INT known_ret ATTRIBUTE_UNUSED, | |
| 112 unsigned HOST_WIDE_INT *nonzero ATTRIBUTE_UNUSED) | |
| 113 { | |
| 114 return NULL; | |
| 115 } | |
| 116 | |
| 117 bool | |
| 118 reg_truncated_to_mode_general (enum machine_mode mode ATTRIBUTE_UNUSED, | |
| 119 const_rtx x ATTRIBUTE_UNUSED) | |
| 120 { | |
| 121 return false; | |
| 122 } | |
| 123 | |
| 124 /* Assuming that X is an rtx (e.g., MEM, REG or SUBREG) for a fixed-point | |
| 125 number, return an rtx (MEM, SUBREG, or CONST_INT) that refers to the | |
| 126 least-significant part of X. | |
| 127 MODE specifies how big a part of X to return. | |
| 128 | |
| 129 If the requested operation cannot be done, 0 is returned. | |
| 130 | |
| 131 This is similar to gen_lowpart_general. */ | |
| 132 | |
| 133 rtx | |
| 134 gen_lowpart_if_possible (enum machine_mode mode, rtx x) | |
| 135 { | |
| 136 rtx result = gen_lowpart_common (mode, x); | |
| 137 | |
| 138 if (result) | |
| 139 return result; | |
| 140 else if (MEM_P (x)) | |
| 141 { | |
| 142 /* This is the only other case we handle. */ | |
| 143 int offset = 0; | |
| 144 rtx new_rtx; | |
| 145 | |
| 146 if (WORDS_BIG_ENDIAN) | |
| 147 offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD) | |
| 148 - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD)); | |
| 149 if (BYTES_BIG_ENDIAN) | |
| 150 /* Adjust the address so that the address-after-the-data is | |
| 151 unchanged. */ | |
| 152 offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode)) | |
| 153 - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x)))); | |
| 154 | |
| 155 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
|
156 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
|
157 MEM_ADDR_SPACE (x))) |
| 0 | 158 return 0; |
| 159 | |
| 160 return new_rtx; | |
| 161 } | |
| 162 else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode | |
| 163 && validate_subreg (mode, GET_MODE (x), x, | |
| 164 subreg_lowpart_offset (mode, GET_MODE (x)))) | |
| 165 return gen_lowpart_SUBREG (mode, x); | |
| 166 else | |
| 167 return 0; | |
| 168 } | |
| 169 |