Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-ssa-address.c @ 143:76e1cf5455ef
add cbc_gc test
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sun, 23 Dec 2018 19:24:05 +0900 |
| parents | 84e7813d76e9 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Memory address lowering and addressing mode selection. |
| 131 | 2 Copyright (C) 2004-2018 Free Software Foundation, Inc. |
|
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3 |
| 0 | 4 This file is part of GCC. |
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5 |
| 0 | 6 GCC is free software; you can redistribute it and/or modify it |
| 7 under the terms of the GNU General Public License as published by the | |
| 8 Free Software Foundation; either version 3, or (at your option) any | |
| 9 later version. | |
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10 |
| 0 | 11 GCC is distributed in the hope that it will be useful, but WITHOUT |
| 12 ANY 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. | |
|
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15 |
| 0 | 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 /* Utility functions for manipulation with TARGET_MEM_REFs -- tree expressions | |
| 21 that directly map to addressing modes of the target. */ | |
| 22 | |
| 23 #include "config.h" | |
| 24 #include "system.h" | |
| 25 #include "coretypes.h" | |
| 111 | 26 #include "backend.h" |
| 27 #include "target.h" | |
| 28 #include "rtl.h" | |
| 0 | 29 #include "tree.h" |
| 111 | 30 #include "gimple.h" |
| 31 #include "memmodel.h" | |
| 32 #include "stringpool.h" | |
| 33 #include "tree-vrp.h" | |
| 34 #include "tree-ssanames.h" | |
| 35 #include "expmed.h" | |
| 36 #include "insn-config.h" | |
| 37 #include "emit-rtl.h" | |
| 38 #include "recog.h" | |
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39 #include "tree-pretty-print.h" |
| 111 | 40 #include "fold-const.h" |
| 41 #include "stor-layout.h" | |
| 42 #include "gimple-iterator.h" | |
| 43 #include "gimplify-me.h" | |
| 44 #include "tree-ssa-loop-ivopts.h" | |
| 45 #include "expr.h" | |
| 46 #include "tree-dfa.h" | |
| 47 #include "dumpfile.h" | |
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48 #include "tree-affine.h" |
| 111 | 49 #include "gimplify.h" |
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50 |
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51 /* FIXME: We compute address costs using RTL. */ |
| 111 | 52 #include "tree-ssa-address.h" |
| 0 | 53 |
| 54 /* TODO -- handling of symbols (according to Richard Hendersons | |
| 55 comments, http://gcc.gnu.org/ml/gcc-patches/2005-04/msg00949.html): | |
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56 |
| 0 | 57 There are at least 5 different kinds of symbols that we can run up against: |
| 58 | |
| 59 (1) binds_local_p, small data area. | |
| 60 (2) binds_local_p, eg local statics | |
| 61 (3) !binds_local_p, eg global variables | |
| 62 (4) thread local, local_exec | |
| 63 (5) thread local, !local_exec | |
| 64 | |
| 65 Now, (1) won't appear often in an array context, but it certainly can. | |
| 66 All you have to do is set -GN high enough, or explicitly mark any | |
| 67 random object __attribute__((section (".sdata"))). | |
| 68 | |
| 69 All of these affect whether or not a symbol is in fact a valid address. | |
| 70 The only one tested here is (3). And that result may very well | |
| 71 be incorrect for (4) or (5). | |
| 72 | |
| 73 An incorrect result here does not cause incorrect results out the | |
| 74 back end, because the expander in expr.c validizes the address. However | |
| 75 it would be nice to improve the handling here in order to produce more | |
| 76 precise results. */ | |
| 77 | |
| 78 /* A "template" for memory address, used to determine whether the address is | |
| 79 valid for mode. */ | |
| 80 | |
| 111 | 81 struct GTY (()) mem_addr_template { |
| 0 | 82 rtx ref; /* The template. */ |
| 83 rtx * GTY ((skip)) step_p; /* The point in template where the step should be | |
| 84 filled in. */ | |
| 85 rtx * GTY ((skip)) off_p; /* The point in template where the offset should | |
| 86 be filled in. */ | |
| 111 | 87 }; |
| 0 | 88 |
| 89 | |
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90 /* The templates. Each of the low five bits of the index corresponds to one |
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91 component of TARGET_MEM_REF being present, while the high bits identify |
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92 the address space. See TEMPL_IDX. */ |
| 0 | 93 |
| 111 | 94 static GTY(()) vec<mem_addr_template, va_gc> *mem_addr_template_list; |
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95 |
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96 #define TEMPL_IDX(AS, SYMBOL, BASE, INDEX, STEP, OFFSET) \ |
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97 (((int) (AS) << 5) \ |
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98 | ((SYMBOL != 0) << 4) \ |
| 0 | 99 | ((BASE != 0) << 3) \ |
| 100 | ((INDEX != 0) << 2) \ | |
| 101 | ((STEP != 0) << 1) \ | |
| 102 | (OFFSET != 0)) | |
| 103 | |
| 104 /* Stores address for memory reference with parameters SYMBOL, BASE, INDEX, | |
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105 STEP and OFFSET to *ADDR using address mode ADDRESS_MODE. Stores pointers |
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106 to where step is placed to *STEP_P and offset to *OFFSET_P. */ |
| 0 | 107 |
| 108 static void | |
| 111 | 109 gen_addr_rtx (machine_mode address_mode, |
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110 rtx symbol, rtx base, rtx index, rtx step, rtx offset, |
| 0 | 111 rtx *addr, rtx **step_p, rtx **offset_p) |
| 112 { | |
| 113 rtx act_elem; | |
| 114 | |
| 115 *addr = NULL_RTX; | |
| 116 if (step_p) | |
| 117 *step_p = NULL; | |
| 118 if (offset_p) | |
| 119 *offset_p = NULL; | |
| 120 | |
| 111 | 121 if (index && index != const0_rtx) |
| 0 | 122 { |
| 123 act_elem = index; | |
| 124 if (step) | |
| 125 { | |
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126 act_elem = gen_rtx_MULT (address_mode, act_elem, step); |
| 0 | 127 |
| 128 if (step_p) | |
| 129 *step_p = &XEXP (act_elem, 1); | |
| 130 } | |
| 131 | |
| 132 *addr = act_elem; | |
| 133 } | |
| 134 | |
| 111 | 135 if (base && base != const0_rtx) |
| 0 | 136 { |
| 137 if (*addr) | |
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138 *addr = simplify_gen_binary (PLUS, address_mode, base, *addr); |
| 0 | 139 else |
| 140 *addr = base; | |
| 141 } | |
| 142 | |
| 143 if (symbol) | |
| 144 { | |
| 145 act_elem = symbol; | |
| 146 if (offset) | |
| 147 { | |
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148 act_elem = gen_rtx_PLUS (address_mode, act_elem, offset); |
| 0 | 149 |
| 150 if (offset_p) | |
| 151 *offset_p = &XEXP (act_elem, 1); | |
| 152 | |
| 153 if (GET_CODE (symbol) == SYMBOL_REF | |
| 154 || GET_CODE (symbol) == LABEL_REF | |
| 155 || GET_CODE (symbol) == CONST) | |
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156 act_elem = gen_rtx_CONST (address_mode, act_elem); |
| 0 | 157 } |
| 158 | |
| 159 if (*addr) | |
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160 *addr = gen_rtx_PLUS (address_mode, *addr, act_elem); |
| 0 | 161 else |
| 162 *addr = act_elem; | |
| 163 } | |
| 164 else if (offset) | |
| 165 { | |
| 166 if (*addr) | |
| 167 { | |
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168 *addr = gen_rtx_PLUS (address_mode, *addr, offset); |
| 0 | 169 if (offset_p) |
| 170 *offset_p = &XEXP (*addr, 1); | |
| 171 } | |
| 172 else | |
| 173 { | |
| 174 *addr = offset; | |
| 175 if (offset_p) | |
| 176 *offset_p = addr; | |
| 177 } | |
| 178 } | |
| 179 | |
| 180 if (!*addr) | |
| 181 *addr = const0_rtx; | |
| 182 } | |
| 183 | |
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184 /* Returns address for TARGET_MEM_REF with parameters given by ADDR |
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185 in address space AS. |
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186 If REALLY_EXPAND is false, just make fake registers instead |
| 0 | 187 of really expanding the operands, and perform the expansion in-place |
| 188 by using one of the "templates". */ | |
| 189 | |
| 190 rtx | |
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191 addr_for_mem_ref (struct mem_address *addr, addr_space_t as, |
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192 bool really_expand) |
| 0 | 193 { |
| 111 | 194 scalar_int_mode address_mode = targetm.addr_space.address_mode (as); |
| 195 scalar_int_mode pointer_mode = targetm.addr_space.pointer_mode (as); | |
| 0 | 196 rtx address, sym, bse, idx, st, off; |
| 197 struct mem_addr_template *templ; | |
| 198 | |
| 199 if (addr->step && !integer_onep (addr->step)) | |
| 111 | 200 st = immed_wide_int_const (wi::to_wide (addr->step), pointer_mode); |
| 0 | 201 else |
| 202 st = NULL_RTX; | |
| 203 | |
| 204 if (addr->offset && !integer_zerop (addr->offset)) | |
| 111 | 205 { |
| 131 | 206 poly_offset_int dc |
| 207 = poly_offset_int::from (wi::to_poly_wide (addr->offset), SIGNED); | |
| 111 | 208 off = immed_wide_int_const (dc, pointer_mode); |
| 209 } | |
| 0 | 210 else |
| 211 off = NULL_RTX; | |
| 212 | |
| 213 if (!really_expand) | |
| 214 { | |
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215 unsigned int templ_index |
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216 = TEMPL_IDX (as, addr->symbol, addr->base, addr->index, st, off); |
| 0 | 217 |
| 111 | 218 if (templ_index >= vec_safe_length (mem_addr_template_list)) |
| 219 vec_safe_grow_cleared (mem_addr_template_list, templ_index + 1); | |
| 0 | 220 |
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221 /* Reuse the templates for addresses, so that we do not waste memory. */ |
| 111 | 222 templ = &(*mem_addr_template_list)[templ_index]; |
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223 if (!templ->ref) |
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224 { |
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225 sym = (addr->symbol ? |
| 111 | 226 gen_rtx_SYMBOL_REF (pointer_mode, ggc_strdup ("test_symbol")) |
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227 : NULL_RTX); |
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228 bse = (addr->base ? |
| 111 | 229 gen_raw_REG (pointer_mode, LAST_VIRTUAL_REGISTER + 1) |
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230 : NULL_RTX); |
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231 idx = (addr->index ? |
| 111 | 232 gen_raw_REG (pointer_mode, LAST_VIRTUAL_REGISTER + 2) |
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233 : NULL_RTX); |
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234 |
| 111 | 235 gen_addr_rtx (pointer_mode, sym, bse, idx, |
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236 st? const0_rtx : NULL_RTX, |
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237 off? const0_rtx : NULL_RTX, |
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238 &templ->ref, |
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239 &templ->step_p, |
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240 &templ->off_p); |
| 0 | 241 } |
| 242 | |
| 243 if (st) | |
| 244 *templ->step_p = st; | |
| 245 if (off) | |
| 246 *templ->off_p = off; | |
| 247 | |
| 248 return templ->ref; | |
| 249 } | |
| 250 | |
| 251 /* Otherwise really expand the expressions. */ | |
| 252 sym = (addr->symbol | |
| 111 | 253 ? expand_expr (addr->symbol, NULL_RTX, pointer_mode, EXPAND_NORMAL) |
| 0 | 254 : NULL_RTX); |
| 255 bse = (addr->base | |
| 111 | 256 ? expand_expr (addr->base, NULL_RTX, pointer_mode, EXPAND_NORMAL) |
| 0 | 257 : NULL_RTX); |
| 258 idx = (addr->index | |
| 111 | 259 ? expand_expr (addr->index, NULL_RTX, pointer_mode, EXPAND_NORMAL) |
| 0 | 260 : NULL_RTX); |
| 261 | |
| 111 | 262 gen_addr_rtx (pointer_mode, sym, bse, idx, st, off, &address, NULL, NULL); |
| 263 if (pointer_mode != address_mode) | |
| 264 address = convert_memory_address (address_mode, address); | |
| 0 | 265 return address; |
| 266 } | |
| 267 | |
| 111 | 268 /* implement addr_for_mem_ref() directly from a tree, which avoids exporting |
| 269 the mem_address structure. */ | |
| 270 | |
| 271 rtx | |
| 272 addr_for_mem_ref (tree exp, addr_space_t as, bool really_expand) | |
| 273 { | |
| 274 struct mem_address addr; | |
| 275 get_address_description (exp, &addr); | |
| 276 return addr_for_mem_ref (&addr, as, really_expand); | |
| 277 } | |
| 278 | |
| 0 | 279 /* Returns address of MEM_REF in TYPE. */ |
| 280 | |
| 281 tree | |
| 282 tree_mem_ref_addr (tree type, tree mem_ref) | |
| 283 { | |
| 284 tree addr; | |
| 285 tree act_elem; | |
| 286 tree step = TMR_STEP (mem_ref), offset = TMR_OFFSET (mem_ref); | |
| 287 tree addr_base = NULL_TREE, addr_off = NULL_TREE; | |
| 288 | |
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289 addr_base = fold_convert (type, TMR_BASE (mem_ref)); |
| 0 | 290 |
| 291 act_elem = TMR_INDEX (mem_ref); | |
| 292 if (act_elem) | |
| 293 { | |
| 294 if (step) | |
| 111 | 295 act_elem = fold_build2 (MULT_EXPR, TREE_TYPE (act_elem), |
| 296 act_elem, step); | |
| 0 | 297 addr_off = act_elem; |
| 298 } | |
| 299 | |
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300 act_elem = TMR_INDEX2 (mem_ref); |
| 0 | 301 if (act_elem) |
| 302 { | |
| 303 if (addr_off) | |
| 111 | 304 addr_off = fold_build2 (PLUS_EXPR, TREE_TYPE (addr_off), |
| 305 addr_off, act_elem); | |
| 0 | 306 else |
| 307 addr_off = act_elem; | |
| 308 } | |
| 309 | |
| 310 if (offset && !integer_zerop (offset)) | |
| 311 { | |
| 312 if (addr_off) | |
| 111 | 313 addr_off = fold_build2 (PLUS_EXPR, TREE_TYPE (addr_off), addr_off, |
| 314 fold_convert (TREE_TYPE (addr_off), offset)); | |
| 0 | 315 else |
| 316 addr_off = offset; | |
| 317 } | |
| 318 | |
| 319 if (addr_off) | |
| 111 | 320 addr = fold_build_pointer_plus (addr_base, addr_off); |
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321 else |
| 0 | 322 addr = addr_base; |
| 323 | |
| 324 return addr; | |
| 325 } | |
| 326 | |
| 327 /* Returns true if a memory reference in MODE and with parameters given by | |
| 328 ADDR is valid on the current target. */ | |
| 329 | |
| 111 | 330 bool |
| 331 valid_mem_ref_p (machine_mode mode, addr_space_t as, | |
|
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332 struct mem_address *addr) |
| 0 | 333 { |
| 334 rtx address; | |
| 335 | |
|
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336 address = addr_for_mem_ref (addr, as, false); |
| 0 | 337 if (!address) |
| 338 return false; | |
| 339 | |
|
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340 return memory_address_addr_space_p (mode, address, as); |
| 0 | 341 } |
| 342 | |
| 343 /* Checks whether a TARGET_MEM_REF with type TYPE and parameters given by ADDR | |
| 344 is valid on the current target and if so, creates and returns the | |
|
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345 TARGET_MEM_REF. If VERIFY is false omit the verification step. */ |
| 0 | 346 |
| 347 static tree | |
|
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348 create_mem_ref_raw (tree type, tree alias_ptr_type, struct mem_address *addr, |
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349 bool verify) |
| 0 | 350 { |
|
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351 tree base, index2; |
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352 |
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353 if (verify |
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354 && !valid_mem_ref_p (TYPE_MODE (type), TYPE_ADDR_SPACE (type), addr)) |
| 0 | 355 return NULL_TREE; |
| 356 | |
| 357 if (addr->step && integer_onep (addr->step)) | |
| 358 addr->step = NULL_TREE; | |
| 359 | |
|
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360 if (addr->offset) |
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361 addr->offset = fold_convert (alias_ptr_type, addr->offset); |
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362 else |
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363 addr->offset = build_int_cst (alias_ptr_type, 0); |
| 0 | 364 |
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365 if (addr->symbol) |
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366 { |
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367 base = addr->symbol; |
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368 index2 = addr->base; |
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369 } |
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370 else if (addr->base |
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371 && POINTER_TYPE_P (TREE_TYPE (addr->base))) |
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372 { |
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373 base = addr->base; |
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374 index2 = NULL_TREE; |
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375 } |
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376 else |
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377 { |
| 111 | 378 base = build_int_cst (build_pointer_type (type), 0); |
|
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379 index2 = addr->base; |
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380 } |
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381 |
| 111 | 382 /* If possible use a plain MEM_REF instead of a TARGET_MEM_REF. |
| 383 ??? As IVOPTs does not follow restrictions to where the base | |
| 384 pointer may point to create a MEM_REF only if we know that | |
| 385 base is valid. */ | |
| 386 if ((TREE_CODE (base) == ADDR_EXPR || TREE_CODE (base) == INTEGER_CST) | |
|
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387 && (!index2 || integer_zerop (index2)) |
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388 && (!addr->index || integer_zerop (addr->index))) |
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389 return fold_build2 (MEM_REF, type, base, addr->offset); |
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390 |
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391 return build5 (TARGET_MEM_REF, type, |
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392 base, addr->offset, addr->index, addr->step, index2); |
| 0 | 393 } |
| 394 | |
| 395 /* Returns true if OBJ is an object whose address is a link time constant. */ | |
| 396 | |
| 397 static bool | |
| 398 fixed_address_object_p (tree obj) | |
| 399 { | |
| 111 | 400 return (VAR_P (obj) |
| 401 && (TREE_STATIC (obj) || DECL_EXTERNAL (obj)) | |
| 0 | 402 && ! DECL_DLLIMPORT_P (obj)); |
| 403 } | |
| 404 | |
| 405 /* If ADDR contains an address of object that is a link time constant, | |
| 406 move it to PARTS->symbol. */ | |
| 407 | |
| 111 | 408 void |
| 0 | 409 move_fixed_address_to_symbol (struct mem_address *parts, aff_tree *addr) |
| 410 { | |
| 411 unsigned i; | |
| 412 tree val = NULL_TREE; | |
| 413 | |
| 414 for (i = 0; i < addr->n; i++) | |
| 415 { | |
| 111 | 416 if (addr->elts[i].coef != 1) |
| 0 | 417 continue; |
| 418 | |
| 419 val = addr->elts[i].val; | |
| 420 if (TREE_CODE (val) == ADDR_EXPR | |
| 421 && fixed_address_object_p (TREE_OPERAND (val, 0))) | |
| 422 break; | |
| 423 } | |
| 424 | |
| 425 if (i == addr->n) | |
| 426 return; | |
| 427 | |
|
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428 parts->symbol = val; |
| 0 | 429 aff_combination_remove_elt (addr, i); |
| 430 } | |
| 431 | |
| 111 | 432 /* Return true if ADDR contains an instance of BASE_HINT and it's moved to |
| 433 PARTS->base. */ | |
|
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434 |
| 111 | 435 static bool |
|
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436 move_hint_to_base (tree type, struct mem_address *parts, tree base_hint, |
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437 aff_tree *addr) |
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438 { |
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439 unsigned i; |
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440 tree val = NULL_TREE; |
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441 int qual; |
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442 |
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443 for (i = 0; i < addr->n; i++) |
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444 { |
| 111 | 445 if (addr->elts[i].coef != 1) |
|
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446 continue; |
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447 |
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448 val = addr->elts[i].val; |
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449 if (operand_equal_p (val, base_hint, 0)) |
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450 break; |
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451 } |
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452 |
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453 if (i == addr->n) |
| 111 | 454 return false; |
|
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455 |
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456 /* Cast value to appropriate pointer type. We cannot use a pointer |
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457 to TYPE directly, as the back-end will assume registers of pointer |
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458 type are aligned, and just the base itself may not actually be. |
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459 We use void pointer to the type's address space instead. */ |
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460 qual = ENCODE_QUAL_ADDR_SPACE (TYPE_ADDR_SPACE (type)); |
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461 type = build_qualified_type (void_type_node, qual); |
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462 parts->base = fold_convert (build_pointer_type (type), val); |
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463 aff_combination_remove_elt (addr, i); |
| 111 | 464 return true; |
|
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465 } |
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466 |
| 0 | 467 /* If ADDR contains an address of a dereferenced pointer, move it to |
| 468 PARTS->base. */ | |
| 469 | |
| 470 static void | |
| 471 move_pointer_to_base (struct mem_address *parts, aff_tree *addr) | |
| 472 { | |
| 473 unsigned i; | |
| 474 tree val = NULL_TREE; | |
| 475 | |
| 476 for (i = 0; i < addr->n; i++) | |
| 477 { | |
| 111 | 478 if (addr->elts[i].coef != 1) |
| 0 | 479 continue; |
| 480 | |
| 481 val = addr->elts[i].val; | |
| 482 if (POINTER_TYPE_P (TREE_TYPE (val))) | |
| 483 break; | |
| 484 } | |
| 485 | |
| 486 if (i == addr->n) | |
| 487 return; | |
| 488 | |
| 489 parts->base = val; | |
| 490 aff_combination_remove_elt (addr, i); | |
| 491 } | |
| 492 | |
|
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493 /* Moves the loop variant part V in linear address ADDR to be the index |
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494 of PARTS. */ |
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495 |
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496 static void |
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497 move_variant_to_index (struct mem_address *parts, aff_tree *addr, tree v) |
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498 { |
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499 unsigned i; |
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500 tree val = NULL_TREE; |
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501 |
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502 gcc_assert (!parts->index); |
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503 for (i = 0; i < addr->n; i++) |
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504 { |
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505 val = addr->elts[i].val; |
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506 if (operand_equal_p (val, v, 0)) |
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507 break; |
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508 } |
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509 |
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510 if (i == addr->n) |
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511 return; |
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512 |
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513 parts->index = fold_convert (sizetype, val); |
| 111 | 514 parts->step = wide_int_to_tree (sizetype, addr->elts[i].coef); |
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515 aff_combination_remove_elt (addr, i); |
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516 } |
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517 |
| 0 | 518 /* Adds ELT to PARTS. */ |
| 519 | |
| 520 static void | |
| 521 add_to_parts (struct mem_address *parts, tree elt) | |
| 522 { | |
| 523 tree type; | |
| 524 | |
| 525 if (!parts->index) | |
| 526 { | |
| 527 parts->index = fold_convert (sizetype, elt); | |
| 528 return; | |
| 529 } | |
| 530 | |
| 531 if (!parts->base) | |
| 532 { | |
| 533 parts->base = elt; | |
| 534 return; | |
| 535 } | |
| 536 | |
| 537 /* Add ELT to base. */ | |
| 538 type = TREE_TYPE (parts->base); | |
| 539 if (POINTER_TYPE_P (type)) | |
| 111 | 540 parts->base = fold_build_pointer_plus (parts->base, elt); |
| 0 | 541 else |
| 111 | 542 parts->base = fold_build2 (PLUS_EXPR, type, parts->base, elt); |
| 543 } | |
| 544 | |
| 545 /* Returns true if multiplying by RATIO is allowed in an address. Test the | |
| 546 validity for a memory reference accessing memory of mode MODE in address | |
| 547 space AS. */ | |
| 548 | |
| 549 static bool | |
| 550 multiplier_allowed_in_address_p (HOST_WIDE_INT ratio, machine_mode mode, | |
| 551 addr_space_t as) | |
| 552 { | |
| 553 #define MAX_RATIO 128 | |
| 554 unsigned int data_index = (int) as * MAX_MACHINE_MODE + (int) mode; | |
| 555 static vec<sbitmap> valid_mult_list; | |
| 556 sbitmap valid_mult; | |
| 557 | |
| 558 if (data_index >= valid_mult_list.length ()) | |
| 559 valid_mult_list.safe_grow_cleared (data_index + 1); | |
| 560 | |
| 561 valid_mult = valid_mult_list[data_index]; | |
| 562 if (!valid_mult) | |
| 563 { | |
| 564 machine_mode address_mode = targetm.addr_space.address_mode (as); | |
| 565 rtx reg1 = gen_raw_REG (address_mode, LAST_VIRTUAL_REGISTER + 1); | |
| 566 rtx reg2 = gen_raw_REG (address_mode, LAST_VIRTUAL_REGISTER + 2); | |
| 567 rtx addr, scaled; | |
| 568 HOST_WIDE_INT i; | |
| 569 | |
| 570 valid_mult = sbitmap_alloc (2 * MAX_RATIO + 1); | |
| 571 bitmap_clear (valid_mult); | |
| 572 scaled = gen_rtx_fmt_ee (MULT, address_mode, reg1, NULL_RTX); | |
| 573 addr = gen_rtx_fmt_ee (PLUS, address_mode, scaled, reg2); | |
| 574 for (i = -MAX_RATIO; i <= MAX_RATIO; i++) | |
| 575 { | |
| 576 XEXP (scaled, 1) = gen_int_mode (i, address_mode); | |
| 577 if (memory_address_addr_space_p (mode, addr, as) | |
| 578 || memory_address_addr_space_p (mode, scaled, as)) | |
| 579 bitmap_set_bit (valid_mult, i + MAX_RATIO); | |
| 580 } | |
| 581 | |
| 582 if (dump_file && (dump_flags & TDF_DETAILS)) | |
| 583 { | |
| 584 fprintf (dump_file, " allowed multipliers:"); | |
| 585 for (i = -MAX_RATIO; i <= MAX_RATIO; i++) | |
| 586 if (bitmap_bit_p (valid_mult, i + MAX_RATIO)) | |
| 587 fprintf (dump_file, " %d", (int) i); | |
| 588 fprintf (dump_file, "\n"); | |
| 589 fprintf (dump_file, "\n"); | |
| 590 } | |
| 591 | |
| 592 valid_mult_list[data_index] = valid_mult; | |
| 593 } | |
| 594 | |
| 595 if (ratio > MAX_RATIO || ratio < -MAX_RATIO) | |
| 596 return false; | |
| 597 | |
| 598 return bitmap_bit_p (valid_mult, ratio + MAX_RATIO); | |
| 0 | 599 } |
| 600 | |
| 601 /* Finds the most expensive multiplication in ADDR that can be | |
| 602 expressed in an addressing mode and move the corresponding | |
| 603 element(s) to PARTS. */ | |
| 604 | |
| 605 static void | |
|
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606 most_expensive_mult_to_index (tree type, struct mem_address *parts, |
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607 aff_tree *addr, bool speed) |
| 0 | 608 { |
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609 addr_space_t as = TYPE_ADDR_SPACE (type); |
| 111 | 610 machine_mode address_mode = targetm.addr_space.address_mode (as); |
| 0 | 611 HOST_WIDE_INT coef; |
| 612 unsigned best_mult_cost = 0, acost; | |
| 613 tree mult_elt = NULL_TREE, elt; | |
| 614 unsigned i, j; | |
| 615 enum tree_code op_code; | |
| 616 | |
| 111 | 617 offset_int best_mult = 0; |
| 0 | 618 for (i = 0; i < addr->n; i++) |
| 619 { | |
| 111 | 620 if (!wi::fits_shwi_p (addr->elts[i].coef)) |
| 0 | 621 continue; |
| 622 | |
| 111 | 623 coef = addr->elts[i].coef.to_shwi (); |
| 0 | 624 if (coef == 1 |
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625 || !multiplier_allowed_in_address_p (coef, TYPE_MODE (type), as)) |
| 0 | 626 continue; |
| 627 | |
| 111 | 628 acost = mult_by_coeff_cost (coef, address_mode, speed); |
| 0 | 629 |
| 630 if (acost > best_mult_cost) | |
| 631 { | |
| 632 best_mult_cost = acost; | |
| 111 | 633 best_mult = offset_int::from (addr->elts[i].coef, SIGNED); |
| 0 | 634 } |
| 635 } | |
| 636 | |
| 637 if (!best_mult_cost) | |
| 638 return; | |
| 639 | |
| 640 /* Collect elements multiplied by best_mult. */ | |
| 641 for (i = j = 0; i < addr->n; i++) | |
| 642 { | |
| 111 | 643 offset_int amult = offset_int::from (addr->elts[i].coef, SIGNED); |
| 644 offset_int amult_neg = -wi::sext (amult, TYPE_PRECISION (addr->type)); | |
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645 |
| 111 | 646 if (amult == best_mult) |
| 0 | 647 op_code = PLUS_EXPR; |
| 111 | 648 else if (amult_neg == best_mult) |
| 0 | 649 op_code = MINUS_EXPR; |
| 650 else | |
| 651 { | |
| 652 addr->elts[j] = addr->elts[i]; | |
| 653 j++; | |
| 654 continue; | |
| 655 } | |
| 656 | |
| 657 elt = fold_convert (sizetype, addr->elts[i].val); | |
| 658 if (mult_elt) | |
| 659 mult_elt = fold_build2 (op_code, sizetype, mult_elt, elt); | |
| 660 else if (op_code == PLUS_EXPR) | |
| 661 mult_elt = elt; | |
| 662 else | |
| 663 mult_elt = fold_build1 (NEGATE_EXPR, sizetype, elt); | |
| 664 } | |
| 665 addr->n = j; | |
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666 |
| 0 | 667 parts->index = mult_elt; |
| 111 | 668 parts->step = wide_int_to_tree (sizetype, best_mult); |
| 0 | 669 } |
| 670 | |
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671 /* Splits address ADDR for a memory access of type TYPE into PARTS. |
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672 If BASE_HINT is non-NULL, it specifies an SSA name to be used |
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673 preferentially as base of the reference, and IV_CAND is the selected |
| 111 | 674 iv candidate used in ADDR. Store true to VAR_IN_BASE if variant |
| 675 part of address is split to PARTS.base. | |
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676 |
| 0 | 677 TODO -- be more clever about the distribution of the elements of ADDR |
| 678 to PARTS. Some architectures do not support anything but single | |
| 679 register in address, possibly with a small integer offset; while | |
| 680 create_mem_ref will simplify the address to an acceptable shape | |
| 681 later, it would be more efficient to know that asking for complicated | |
| 682 addressing modes is useless. */ | |
| 683 | |
| 684 static void | |
| 111 | 685 addr_to_parts (tree type, aff_tree *addr, tree iv_cand, tree base_hint, |
| 686 struct mem_address *parts, bool *var_in_base, bool speed) | |
| 0 | 687 { |
| 688 tree part; | |
| 689 unsigned i; | |
| 690 | |
| 691 parts->symbol = NULL_TREE; | |
| 692 parts->base = NULL_TREE; | |
| 693 parts->index = NULL_TREE; | |
| 694 parts->step = NULL_TREE; | |
| 695 | |
| 131 | 696 if (maybe_ne (addr->offset, 0)) |
| 111 | 697 parts->offset = wide_int_to_tree (sizetype, addr->offset); |
| 0 | 698 else |
| 699 parts->offset = NULL_TREE; | |
| 700 | |
| 701 /* Try to find a symbol. */ | |
| 702 move_fixed_address_to_symbol (parts, addr); | |
| 703 | |
| 111 | 704 /* Since at the moment there is no reliable way to know how to |
| 705 distinguish between pointer and its offset, we decide if var | |
| 706 part is the pointer based on guess. */ | |
| 707 *var_in_base = (base_hint != NULL && parts->symbol == NULL); | |
| 708 if (*var_in_base) | |
| 709 *var_in_base = move_hint_to_base (type, parts, base_hint, addr); | |
| 710 else | |
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711 move_variant_to_index (parts, addr, iv_cand); |
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712 |
| 111 | 713 /* First move the most expensive feasible multiplication to index. */ |
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714 if (!parts->index) |
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715 most_expensive_mult_to_index (type, parts, addr, speed); |
| 0 | 716 |
| 111 | 717 /* Move pointer into base. */ |
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718 if (!parts->symbol && !parts->base) |
| 0 | 719 move_pointer_to_base (parts, addr); |
| 720 | |
| 721 /* Then try to process the remaining elements. */ | |
| 722 for (i = 0; i < addr->n; i++) | |
| 723 { | |
| 724 part = fold_convert (sizetype, addr->elts[i].val); | |
| 111 | 725 if (addr->elts[i].coef != 1) |
| 0 | 726 part = fold_build2 (MULT_EXPR, sizetype, part, |
| 111 | 727 wide_int_to_tree (sizetype, addr->elts[i].coef)); |
| 0 | 728 add_to_parts (parts, part); |
| 729 } | |
| 730 if (addr->rest) | |
| 731 add_to_parts (parts, fold_convert (sizetype, addr->rest)); | |
| 732 } | |
| 733 | |
| 734 /* Force the PARTS to register. */ | |
| 735 | |
| 736 static void | |
| 737 gimplify_mem_ref_parts (gimple_stmt_iterator *gsi, struct mem_address *parts) | |
| 738 { | |
| 739 if (parts->base) | |
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740 parts->base = force_gimple_operand_gsi_1 (gsi, parts->base, |
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741 is_gimple_mem_ref_addr, NULL_TREE, |
| 0 | 742 true, GSI_SAME_STMT); |
| 743 if (parts->index) | |
| 744 parts->index = force_gimple_operand_gsi (gsi, parts->index, | |
| 745 true, NULL_TREE, | |
| 746 true, GSI_SAME_STMT); | |
| 747 } | |
| 748 | |
| 131 | 749 /* Return true if the OFFSET in PARTS is the only thing that is making |
| 750 it an invalid address for type TYPE. */ | |
| 751 | |
| 752 static bool | |
| 753 mem_ref_valid_without_offset_p (tree type, mem_address parts) | |
| 754 { | |
| 755 if (!parts.base) | |
| 756 parts.base = parts.offset; | |
| 757 parts.offset = NULL_TREE; | |
| 758 return valid_mem_ref_p (TYPE_MODE (type), TYPE_ADDR_SPACE (type), &parts); | |
| 759 } | |
| 760 | |
| 761 /* Fold PARTS->offset into PARTS->base, so that there is no longer | |
| 762 a separate offset. Emit any new instructions before GSI. */ | |
| 763 | |
| 764 static void | |
| 765 add_offset_to_base (gimple_stmt_iterator *gsi, mem_address *parts) | |
| 766 { | |
| 767 tree tmp = parts->offset; | |
| 768 if (parts->base) | |
| 769 { | |
| 770 tmp = fold_build_pointer_plus (parts->base, tmp); | |
| 771 tmp = force_gimple_operand_gsi_1 (gsi, tmp, is_gimple_mem_ref_addr, | |
| 772 NULL_TREE, true, GSI_SAME_STMT); | |
| 773 } | |
| 774 parts->base = tmp; | |
| 775 parts->offset = NULL_TREE; | |
| 776 } | |
| 777 | |
| 0 | 778 /* Creates and returns a TARGET_MEM_REF for address ADDR. If necessary |
| 779 computations are emitted in front of GSI. TYPE is the mode | |
|
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780 of created memory reference. IV_CAND is the selected iv candidate in ADDR, |
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781 and BASE_HINT is non NULL if IV_CAND comes from a base address |
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782 object. */ |
| 0 | 783 |
| 784 tree | |
| 785 create_mem_ref (gimple_stmt_iterator *gsi, tree type, aff_tree *addr, | |
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786 tree alias_ptr_type, tree iv_cand, tree base_hint, bool speed) |
| 0 | 787 { |
| 111 | 788 bool var_in_base; |
| 0 | 789 tree mem_ref, tmp; |
| 790 struct mem_address parts; | |
| 791 | |
| 111 | 792 addr_to_parts (type, addr, iv_cand, base_hint, &parts, &var_in_base, speed); |
| 0 | 793 gimplify_mem_ref_parts (gsi, &parts); |
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794 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); |
| 0 | 795 if (mem_ref) |
| 796 return mem_ref; | |
| 797 | |
| 798 /* The expression is too complicated. Try making it simpler. */ | |
| 799 | |
| 111 | 800 /* Merge symbol into other parts. */ |
| 801 if (parts.symbol) | |
| 802 { | |
| 803 tmp = parts.symbol; | |
| 804 parts.symbol = NULL_TREE; | |
| 805 gcc_assert (is_gimple_val (tmp)); | |
| 806 | |
| 807 if (parts.base) | |
| 808 { | |
| 809 gcc_assert (useless_type_conversion_p (sizetype, | |
| 810 TREE_TYPE (parts.base))); | |
| 811 | |
| 812 if (parts.index) | |
| 813 { | |
| 814 /* Add the symbol to base, eventually forcing it to register. */ | |
| 815 tmp = fold_build_pointer_plus (tmp, parts.base); | |
| 816 tmp = force_gimple_operand_gsi_1 (gsi, tmp, | |
| 817 is_gimple_mem_ref_addr, | |
| 818 NULL_TREE, true, | |
| 819 GSI_SAME_STMT); | |
| 820 } | |
| 821 else | |
| 822 { | |
| 823 /* Move base to index, then move the symbol to base. */ | |
| 824 parts.index = parts.base; | |
| 825 } | |
| 826 parts.base = tmp; | |
| 827 } | |
| 828 else | |
| 829 parts.base = tmp; | |
| 830 | |
| 831 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); | |
| 832 if (mem_ref) | |
| 833 return mem_ref; | |
| 834 } | |
| 835 | |
| 836 /* Move multiplication to index by transforming address expression: | |
| 837 [... + index << step + ...] | |
| 838 into: | |
| 839 index' = index << step; | |
| 840 [... + index' + ,,,]. */ | |
| 0 | 841 if (parts.step && !integer_onep (parts.step)) |
| 842 { | |
| 843 gcc_assert (parts.index); | |
| 131 | 844 if (parts.offset && mem_ref_valid_without_offset_p (type, parts)) |
| 845 { | |
| 846 add_offset_to_base (gsi, &parts); | |
| 847 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); | |
| 848 gcc_assert (mem_ref); | |
| 849 return mem_ref; | |
| 850 } | |
| 851 | |
| 0 | 852 parts.index = force_gimple_operand_gsi (gsi, |
| 853 fold_build2 (MULT_EXPR, sizetype, | |
| 854 parts.index, parts.step), | |
| 855 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 856 parts.step = NULL_TREE; | |
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857 |
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858 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); |
| 0 | 859 if (mem_ref) |
| 860 return mem_ref; | |
| 861 } | |
| 862 | |
| 111 | 863 /* Add offset to invariant part by transforming address expression: |
| 864 [base + index + offset] | |
| 865 into: | |
| 866 base' = base + offset; | |
| 867 [base' + index] | |
| 868 or: | |
| 869 index' = index + offset; | |
| 870 [base + index'] | |
| 871 depending on which one is invariant. */ | |
| 872 if (parts.offset && !integer_zerop (parts.offset)) | |
| 0 | 873 { |
| 111 | 874 tree old_base = unshare_expr (parts.base); |
| 875 tree old_index = unshare_expr (parts.index); | |
| 876 tree old_offset = unshare_expr (parts.offset); | |
|
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877 |
| 111 | 878 tmp = parts.offset; |
| 879 parts.offset = NULL_TREE; | |
| 880 /* Add offset to invariant part. */ | |
| 881 if (!var_in_base) | |
| 0 | 882 { |
| 111 | 883 if (parts.base) |
| 884 { | |
| 885 tmp = fold_build_pointer_plus (parts.base, tmp); | |
| 886 tmp = force_gimple_operand_gsi_1 (gsi, tmp, | |
| 887 is_gimple_mem_ref_addr, | |
| 888 NULL_TREE, true, | |
| 889 GSI_SAME_STMT); | |
| 890 } | |
| 891 parts.base = tmp; | |
| 892 } | |
| 893 else | |
| 894 { | |
| 0 | 895 if (parts.index) |
| 896 { | |
| 111 | 897 tmp = fold_build_pointer_plus (parts.index, tmp); |
| 898 tmp = force_gimple_operand_gsi_1 (gsi, tmp, | |
| 899 is_gimple_mem_ref_addr, | |
| 900 NULL_TREE, true, | |
| 901 GSI_SAME_STMT); | |
| 0 | 902 } |
| 111 | 903 parts.index = tmp; |
| 0 | 904 } |
| 111 | 905 |
| 906 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); | |
| 907 if (mem_ref) | |
| 908 return mem_ref; | |
| 909 | |
| 910 /* Restore parts.base, index and offset so that we can check if | |
| 911 [base + offset] addressing mode is supported in next step. | |
| 912 This is necessary for targets only support [base + offset], | |
| 913 but not [base + index] addressing mode. */ | |
| 914 parts.base = old_base; | |
| 915 parts.index = old_index; | |
| 916 parts.offset = old_offset; | |
| 917 } | |
| 918 | |
| 919 /* Transform [base + index + ...] into: | |
| 920 base' = base + index; | |
| 921 [base' + ...]. */ | |
| 922 if (parts.index) | |
| 923 { | |
| 924 tmp = parts.index; | |
| 925 parts.index = NULL_TREE; | |
| 926 /* Add index to base. */ | |
| 927 if (parts.base) | |
| 928 { | |
| 929 tmp = fold_build_pointer_plus (parts.base, tmp); | |
| 930 tmp = force_gimple_operand_gsi_1 (gsi, tmp, | |
| 931 is_gimple_mem_ref_addr, | |
| 932 NULL_TREE, true, GSI_SAME_STMT); | |
| 933 } | |
| 934 parts.base = tmp; | |
| 0 | 935 |
|
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936 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); |
| 0 | 937 if (mem_ref) |
| 938 return mem_ref; | |
| 939 } | |
| 940 | |
| 111 | 941 /* Transform [base + offset] into: |
| 942 base' = base + offset; | |
| 943 [base']. */ | |
| 944 if (parts.offset && !integer_zerop (parts.offset)) | |
| 0 | 945 { |
| 131 | 946 add_offset_to_base (gsi, &parts); |
|
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947 mem_ref = create_mem_ref_raw (type, alias_ptr_type, &parts, true); |
| 0 | 948 if (mem_ref) |
| 949 return mem_ref; | |
| 950 } | |
| 951 | |
| 952 /* Verify that the address is in the simplest possible shape | |
| 953 (only a register). If we cannot create such a memory reference, | |
| 954 something is really wrong. */ | |
| 955 gcc_assert (parts.symbol == NULL_TREE); | |
| 956 gcc_assert (parts.index == NULL_TREE); | |
| 957 gcc_assert (!parts.step || integer_onep (parts.step)); | |
| 958 gcc_assert (!parts.offset || integer_zerop (parts.offset)); | |
| 959 gcc_unreachable (); | |
| 960 } | |
| 961 | |
| 962 /* Copies components of the address from OP to ADDR. */ | |
| 963 | |
| 964 void | |
| 965 get_address_description (tree op, struct mem_address *addr) | |
| 966 { | |
|
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967 if (TREE_CODE (TMR_BASE (op)) == ADDR_EXPR) |
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968 { |
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969 addr->symbol = TMR_BASE (op); |
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970 addr->base = TMR_INDEX2 (op); |
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971 } |
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972 else |
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973 { |
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974 addr->symbol = NULL_TREE; |
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975 if (TMR_INDEX2 (op)) |
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976 { |
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977 gcc_assert (integer_zerop (TMR_BASE (op))); |
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978 addr->base = TMR_INDEX2 (op); |
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979 } |
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980 else |
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981 addr->base = TMR_BASE (op); |
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982 } |
| 0 | 983 addr->index = TMR_INDEX (op); |
| 984 addr->step = TMR_STEP (op); | |
| 985 addr->offset = TMR_OFFSET (op); | |
| 986 } | |
| 987 | |
| 111 | 988 /* Copies the reference information from OLD_REF to NEW_REF, where |
| 989 NEW_REF should be either a MEM_REF or a TARGET_MEM_REF. */ | |
| 0 | 990 |
| 991 void | |
| 111 | 992 copy_ref_info (tree new_ref, tree old_ref) |
| 0 | 993 { |
| 111 | 994 tree new_ptr_base = NULL_TREE; |
| 995 | |
| 996 gcc_assert (TREE_CODE (new_ref) == MEM_REF | |
| 997 || TREE_CODE (new_ref) == TARGET_MEM_REF); | |
| 998 | |
| 999 TREE_SIDE_EFFECTS (new_ref) = TREE_SIDE_EFFECTS (old_ref); | |
| 1000 TREE_THIS_VOLATILE (new_ref) = TREE_THIS_VOLATILE (old_ref); | |
| 1001 | |
| 1002 new_ptr_base = TREE_OPERAND (new_ref, 0); | |
| 1003 | |
| 1004 /* We can transfer points-to information from an old pointer | |
| 1005 or decl base to the new one. */ | |
| 1006 if (new_ptr_base | |
| 1007 && TREE_CODE (new_ptr_base) == SSA_NAME | |
| 1008 && !SSA_NAME_PTR_INFO (new_ptr_base)) | |
| 1009 { | |
| 1010 tree base = get_base_address (old_ref); | |
| 1011 if (!base) | |
| 1012 ; | |
| 1013 else if ((TREE_CODE (base) == MEM_REF | |
| 1014 || TREE_CODE (base) == TARGET_MEM_REF) | |
| 1015 && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME | |
| 1016 && SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0))) | |
| 1017 { | |
| 1018 struct ptr_info_def *new_pi; | |
| 1019 unsigned int align, misalign; | |
| 1020 | |
| 1021 duplicate_ssa_name_ptr_info | |
| 1022 (new_ptr_base, SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0))); | |
| 1023 new_pi = SSA_NAME_PTR_INFO (new_ptr_base); | |
| 1024 /* We have to be careful about transferring alignment information. */ | |
| 1025 if (get_ptr_info_alignment (new_pi, &align, &misalign) | |
| 1026 && TREE_CODE (old_ref) == MEM_REF | |
| 1027 && !(TREE_CODE (new_ref) == TARGET_MEM_REF | |
| 1028 && (TMR_INDEX2 (new_ref) | |
| 1029 /* TODO: Below conditions can be relaxed if TMR_INDEX | |
| 1030 is an indcution variable and its initial value and | |
| 1031 step are aligned. */ | |
| 1032 || (TMR_INDEX (new_ref) && !TMR_STEP (new_ref)) | |
| 1033 || (TMR_STEP (new_ref) | |
| 1034 && (TREE_INT_CST_LOW (TMR_STEP (new_ref)) | |
| 1035 < align))))) | |
| 1036 { | |
| 131 | 1037 poly_uint64 inc = (mem_ref_offset (old_ref) |
| 1038 - mem_ref_offset (new_ref)).force_uhwi (); | |
| 111 | 1039 adjust_ptr_info_misalignment (new_pi, inc); |
| 1040 } | |
| 1041 else | |
| 1042 mark_ptr_info_alignment_unknown (new_pi); | |
| 1043 } | |
| 1044 else if (VAR_P (base) | |
| 1045 || TREE_CODE (base) == PARM_DECL | |
| 1046 || TREE_CODE (base) == RESULT_DECL) | |
| 1047 { | |
| 1048 struct ptr_info_def *pi = get_ptr_info (new_ptr_base); | |
| 1049 pt_solution_set_var (&pi->pt, base); | |
| 1050 } | |
| 1051 } | |
| 0 | 1052 } |
| 1053 | |
| 1054 /* Move constants in target_mem_ref REF to offset. Returns the new target | |
| 1055 mem ref if anything changes, NULL_TREE otherwise. */ | |
| 1056 | |
| 1057 tree | |
| 1058 maybe_fold_tmr (tree ref) | |
| 1059 { | |
| 1060 struct mem_address addr; | |
| 1061 bool changed = false; | |
| 111 | 1062 tree new_ref, off; |
| 0 | 1063 |
| 1064 get_address_description (ref, &addr); | |
| 1065 | |
|
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1066 if (addr.base |
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1067 && TREE_CODE (addr.base) == INTEGER_CST |
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1068 && !integer_zerop (addr.base)) |
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1069 { |
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1070 addr.offset = fold_binary_to_constant (PLUS_EXPR, |
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1071 TREE_TYPE (addr.offset), |
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1072 addr.offset, addr.base); |
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1073 addr.base = NULL_TREE; |
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1074 changed = true; |
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1075 } |
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1076 |
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1077 if (addr.symbol |
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1078 && TREE_CODE (TREE_OPERAND (addr.symbol, 0)) == MEM_REF) |
| 0 | 1079 { |
|
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1080 addr.offset = fold_binary_to_constant |
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1081 (PLUS_EXPR, TREE_TYPE (addr.offset), |
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1082 addr.offset, |
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1083 TREE_OPERAND (TREE_OPERAND (addr.symbol, 0), 1)); |
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1084 addr.symbol = TREE_OPERAND (TREE_OPERAND (addr.symbol, 0), 0); |
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1085 changed = true; |
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1086 } |
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1087 else if (addr.symbol |
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1088 && handled_component_p (TREE_OPERAND (addr.symbol, 0))) |
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1089 { |
| 131 | 1090 poly_int64 offset; |
|
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1091 addr.symbol = build_fold_addr_expr |
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1092 (get_addr_base_and_unit_offset |
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1093 (TREE_OPERAND (addr.symbol, 0), &offset)); |
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1094 addr.offset = int_const_binop (PLUS_EXPR, |
| 111 | 1095 addr.offset, size_int (offset)); |
| 0 | 1096 changed = true; |
| 1097 } | |
| 1098 | |
| 1099 if (addr.index && TREE_CODE (addr.index) == INTEGER_CST) | |
| 1100 { | |
| 1101 off = addr.index; | |
| 1102 if (addr.step) | |
| 1103 { | |
| 1104 off = fold_binary_to_constant (MULT_EXPR, sizetype, | |
| 1105 off, addr.step); | |
| 1106 addr.step = NULL_TREE; | |
| 1107 } | |
| 1108 | |
|
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1109 addr.offset = fold_binary_to_constant (PLUS_EXPR, |
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1110 TREE_TYPE (addr.offset), |
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1111 addr.offset, off); |
| 0 | 1112 addr.index = NULL_TREE; |
| 1113 changed = true; | |
| 1114 } | |
| 1115 | |
| 1116 if (!changed) | |
| 1117 return NULL_TREE; | |
|
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1118 |
|
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1119 /* If we have propagated something into this TARGET_MEM_REF and thus |
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1120 ended up folding it, always create a new TARGET_MEM_REF regardless |
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1121 if it is valid in this for on the target - the propagation result |
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1122 wouldn't be anyway. */ |
| 111 | 1123 new_ref = create_mem_ref_raw (TREE_TYPE (ref), |
| 1124 TREE_TYPE (addr.offset), &addr, false); | |
| 1125 TREE_SIDE_EFFECTS (new_ref) = TREE_SIDE_EFFECTS (ref); | |
| 1126 TREE_THIS_VOLATILE (new_ref) = TREE_THIS_VOLATILE (ref); | |
| 1127 return new_ref; | |
| 0 | 1128 } |
| 1129 | |
| 1130 /* Dump PARTS to FILE. */ | |
| 1131 | |
| 1132 extern void dump_mem_address (FILE *, struct mem_address *); | |
| 1133 void | |
| 1134 dump_mem_address (FILE *file, struct mem_address *parts) | |
| 1135 { | |
| 1136 if (parts->symbol) | |
| 1137 { | |
| 1138 fprintf (file, "symbol: "); | |
|
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
|
1139 print_generic_expr (file, TREE_OPERAND (parts->symbol, 0), TDF_SLIM); |
| 0 | 1140 fprintf (file, "\n"); |
| 1141 } | |
| 1142 if (parts->base) | |
| 1143 { | |
| 1144 fprintf (file, "base: "); | |
| 1145 print_generic_expr (file, parts->base, TDF_SLIM); | |
| 1146 fprintf (file, "\n"); | |
| 1147 } | |
| 1148 if (parts->index) | |
| 1149 { | |
| 1150 fprintf (file, "index: "); | |
| 1151 print_generic_expr (file, parts->index, TDF_SLIM); | |
| 1152 fprintf (file, "\n"); | |
| 1153 } | |
| 1154 if (parts->step) | |
| 1155 { | |
| 1156 fprintf (file, "step: "); | |
| 1157 print_generic_expr (file, parts->step, TDF_SLIM); | |
| 1158 fprintf (file, "\n"); | |
| 1159 } | |
| 1160 if (parts->offset) | |
| 1161 { | |
| 1162 fprintf (file, "offset: "); | |
| 1163 print_generic_expr (file, parts->offset, TDF_SLIM); | |
| 1164 fprintf (file, "\n"); | |
| 1165 } | |
| 1166 } | |
| 1167 | |
| 1168 #include "gt-tree-ssa-address.h" |