Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-nested.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | b7f97abdc517 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Nested function decomposition for GIMPLE. |
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2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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3 Free Software Foundation, Inc. |
| 0 | 4 |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify | |
| 8 it under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 3, or (at your option) | |
| 10 any later version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, | |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 GNU General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 24 #include "tm.h" | |
| 25 #include "tree.h" | |
| 26 #include "tm_p.h" | |
| 27 #include "function.h" | |
| 28 #include "tree-dump.h" | |
| 29 #include "tree-inline.h" | |
| 30 #include "gimple.h" | |
| 31 #include "tree-iterator.h" | |
| 32 #include "tree-flow.h" | |
| 33 #include "cgraph.h" | |
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34 #include "expr.h" /* FIXME: For STACK_SAVEAREA_MODE and SAVE_NONLOCAL. */ |
| 0 | 35 #include "langhooks.h" |
| 36 #include "pointer-set.h" | |
| 37 | |
| 38 | |
| 39 /* The object of this pass is to lower the representation of a set of nested | |
| 40 functions in order to expose all of the gory details of the various | |
| 41 nonlocal references. We want to do this sooner rather than later, in | |
| 42 order to give us more freedom in emitting all of the functions in question. | |
| 43 | |
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44 Back in olden times, when gcc was young, we developed an insanely |
| 0 | 45 complicated scheme whereby variables which were referenced nonlocally |
| 46 were forced to live in the stack of the declaring function, and then | |
| 47 the nested functions magically discovered where these variables were | |
| 48 placed. In order for this scheme to function properly, it required | |
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49 that the outer function be partially expanded, then we switch to |
| 0 | 50 compiling the inner function, and once done with those we switch back |
| 51 to compiling the outer function. Such delicate ordering requirements | |
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52 makes it difficult to do whole translation unit optimizations |
| 0 | 53 involving such functions. |
| 54 | |
| 55 The implementation here is much more direct. Everything that can be | |
| 56 referenced by an inner function is a member of an explicitly created | |
| 57 structure herein called the "nonlocal frame struct". The incoming | |
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58 static chain for a nested function is a pointer to this struct in |
| 0 | 59 the parent. In this way, we settle on known offsets from a known |
| 60 base, and so are decoupled from the logic that places objects in the | |
| 61 function's stack frame. More importantly, we don't have to wait for | |
| 62 that to happen -- since the compilation of the inner function is no | |
| 63 longer tied to a real stack frame, the nonlocal frame struct can be | |
| 64 allocated anywhere. Which means that the outer function is now | |
| 65 inlinable. | |
| 66 | |
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67 Theory of operation here is very simple. Iterate over all the |
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68 statements in all the functions (depth first) several times, |
| 0 | 69 allocating structures and fields on demand. In general we want to |
| 70 examine inner functions first, so that we can avoid making changes | |
| 71 to outer functions which are unnecessary. | |
| 72 | |
| 73 The order of the passes matters a bit, in that later passes will be | |
| 74 skipped if it is discovered that the functions don't actually interact | |
| 75 at all. That is, they're nested in the lexical sense but could have | |
| 76 been written as independent functions without change. */ | |
| 77 | |
| 78 | |
| 79 struct nesting_info | |
| 80 { | |
| 81 struct nesting_info *outer; | |
| 82 struct nesting_info *inner; | |
| 83 struct nesting_info *next; | |
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84 |
| 0 | 85 struct pointer_map_t *field_map; |
| 86 struct pointer_map_t *var_map; | |
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87 struct pointer_set_t *mem_refs; |
| 0 | 88 bitmap suppress_expansion; |
| 89 | |
| 90 tree context; | |
| 91 tree new_local_var_chain; | |
| 92 tree debug_var_chain; | |
| 93 tree frame_type; | |
| 94 tree frame_decl; | |
| 95 tree chain_field; | |
| 96 tree chain_decl; | |
| 97 tree nl_goto_field; | |
| 98 | |
| 99 bool any_parm_remapped; | |
| 100 bool any_tramp_created; | |
| 101 char static_chain_added; | |
| 102 }; | |
| 103 | |
| 104 | |
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105 /* Iterate over the nesting tree, starting with ROOT, depth first. */ |
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106 |
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107 static inline struct nesting_info * |
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108 iter_nestinfo_start (struct nesting_info *root) |
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109 { |
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110 while (root->inner) |
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111 root = root->inner; |
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112 return root; |
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113 } |
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114 |
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115 static inline struct nesting_info * |
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116 iter_nestinfo_next (struct nesting_info *node) |
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117 { |
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118 if (node->next) |
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119 return iter_nestinfo_start (node->next); |
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120 return node->outer; |
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121 } |
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122 |
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123 #define FOR_EACH_NEST_INFO(I, ROOT) \ |
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124 for ((I) = iter_nestinfo_start (ROOT); (I); (I) = iter_nestinfo_next (I)) |
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125 |
| 0 | 126 /* Obstack used for the bitmaps in the struct above. */ |
| 127 static struct bitmap_obstack nesting_info_bitmap_obstack; | |
| 128 | |
| 129 | |
| 130 /* We're working in so many different function contexts simultaneously, | |
| 131 that create_tmp_var is dangerous. Prevent mishap. */ | |
| 132 #define create_tmp_var cant_use_create_tmp_var_here_dummy | |
| 133 | |
| 134 /* Like create_tmp_var, except record the variable for registration at | |
| 135 the given nesting level. */ | |
| 136 | |
| 137 static tree | |
| 138 create_tmp_var_for (struct nesting_info *info, tree type, const char *prefix) | |
| 139 { | |
| 140 tree tmp_var; | |
| 141 | |
| 142 /* If the type is of variable size or a type which must be created by the | |
| 143 frontend, something is wrong. Note that we explicitly allow | |
| 144 incomplete types here, since we create them ourselves here. */ | |
| 145 gcc_assert (!TREE_ADDRESSABLE (type)); | |
| 146 gcc_assert (!TYPE_SIZE_UNIT (type) | |
| 147 || TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST); | |
| 148 | |
| 149 tmp_var = create_tmp_var_raw (type, prefix); | |
| 150 DECL_CONTEXT (tmp_var) = info->context; | |
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151 DECL_CHAIN (tmp_var) = info->new_local_var_chain; |
| 0 | 152 DECL_SEEN_IN_BIND_EXPR_P (tmp_var) = 1; |
| 153 if (TREE_CODE (type) == COMPLEX_TYPE | |
| 154 || TREE_CODE (type) == VECTOR_TYPE) | |
| 155 DECL_GIMPLE_REG_P (tmp_var) = 1; | |
| 156 | |
| 157 info->new_local_var_chain = tmp_var; | |
| 158 | |
| 159 return tmp_var; | |
| 160 } | |
| 161 | |
| 162 /* Take the address of EXP to be used within function CONTEXT. | |
| 163 Mark it for addressability as necessary. */ | |
| 164 | |
| 165 tree | |
| 166 build_addr (tree exp, tree context) | |
| 167 { | |
| 168 tree base = exp; | |
| 169 tree save_context; | |
| 170 tree retval; | |
| 171 | |
| 172 while (handled_component_p (base)) | |
| 173 base = TREE_OPERAND (base, 0); | |
| 174 | |
| 175 if (DECL_P (base)) | |
| 176 TREE_ADDRESSABLE (base) = 1; | |
| 177 | |
| 178 /* Building the ADDR_EXPR will compute a set of properties for | |
| 179 that ADDR_EXPR. Those properties are unfortunately context | |
| 180 specific, i.e., they are dependent on CURRENT_FUNCTION_DECL. | |
| 181 | |
| 182 Temporarily set CURRENT_FUNCTION_DECL to the desired context, | |
| 183 build the ADDR_EXPR, then restore CURRENT_FUNCTION_DECL. That | |
| 184 way the properties are for the ADDR_EXPR are computed properly. */ | |
| 185 save_context = current_function_decl; | |
| 186 current_function_decl = context; | |
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187 retval = build_fold_addr_expr (exp); |
| 0 | 188 current_function_decl = save_context; |
| 189 return retval; | |
| 190 } | |
| 191 | |
| 192 /* Insert FIELD into TYPE, sorted by alignment requirements. */ | |
| 193 | |
| 194 void | |
| 195 insert_field_into_struct (tree type, tree field) | |
| 196 { | |
| 197 tree *p; | |
| 198 | |
| 199 DECL_CONTEXT (field) = type; | |
| 200 | |
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201 for (p = &TYPE_FIELDS (type); *p ; p = &DECL_CHAIN (*p)) |
| 0 | 202 if (DECL_ALIGN (field) >= DECL_ALIGN (*p)) |
| 203 break; | |
| 204 | |
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205 DECL_CHAIN (field) = *p; |
| 0 | 206 *p = field; |
| 207 | |
| 208 /* Set correct alignment for frame struct type. */ | |
| 209 if (TYPE_ALIGN (type) < DECL_ALIGN (field)) | |
| 210 TYPE_ALIGN (type) = DECL_ALIGN (field); | |
| 211 } | |
| 212 | |
| 213 /* Build or return the RECORD_TYPE that describes the frame state that is | |
| 214 shared between INFO->CONTEXT and its nested functions. This record will | |
| 215 not be complete until finalize_nesting_tree; up until that point we'll | |
| 216 be adding fields as necessary. | |
| 217 | |
| 218 We also build the DECL that represents this frame in the function. */ | |
| 219 | |
| 220 static tree | |
| 221 get_frame_type (struct nesting_info *info) | |
| 222 { | |
| 223 tree type = info->frame_type; | |
| 224 if (!type) | |
| 225 { | |
| 226 char *name; | |
| 227 | |
| 228 type = make_node (RECORD_TYPE); | |
| 229 | |
| 230 name = concat ("FRAME.", | |
| 231 IDENTIFIER_POINTER (DECL_NAME (info->context)), | |
| 232 NULL); | |
| 233 TYPE_NAME (type) = get_identifier (name); | |
| 234 free (name); | |
| 235 | |
| 236 info->frame_type = type; | |
| 237 info->frame_decl = create_tmp_var_for (info, type, "FRAME"); | |
| 238 | |
| 239 /* ??? Always make it addressable for now, since it is meant to | |
| 240 be pointed to by the static chain pointer. This pessimizes | |
| 241 when it turns out that no static chains are needed because | |
| 242 the nested functions referencing non-local variables are not | |
| 243 reachable, but the true pessimization is to create the non- | |
| 244 local frame structure in the first place. */ | |
| 245 TREE_ADDRESSABLE (info->frame_decl) = 1; | |
| 246 } | |
| 247 return type; | |
| 248 } | |
| 249 | |
| 250 /* Return true if DECL should be referenced by pointer in the non-local | |
| 251 frame structure. */ | |
| 252 | |
| 253 static bool | |
| 254 use_pointer_in_frame (tree decl) | |
| 255 { | |
| 256 if (TREE_CODE (decl) == PARM_DECL) | |
| 257 { | |
| 258 /* It's illegal to copy TREE_ADDRESSABLE, impossible to copy variable | |
| 259 sized decls, and inefficient to copy large aggregates. Don't bother | |
| 260 moving anything but scalar variables. */ | |
| 261 return AGGREGATE_TYPE_P (TREE_TYPE (decl)); | |
| 262 } | |
| 263 else | |
| 264 { | |
| 265 /* Variable sized types make things "interesting" in the frame. */ | |
| 266 return DECL_SIZE (decl) == NULL || !TREE_CONSTANT (DECL_SIZE (decl)); | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 /* Given DECL, a non-locally accessed variable, find or create a field | |
| 271 in the non-local frame structure for the given nesting context. */ | |
| 272 | |
| 273 static tree | |
| 274 lookup_field_for_decl (struct nesting_info *info, tree decl, | |
| 275 enum insert_option insert) | |
| 276 { | |
| 277 void **slot; | |
| 278 | |
| 279 if (insert == NO_INSERT) | |
| 280 { | |
| 281 slot = pointer_map_contains (info->field_map, decl); | |
| 282 return slot ? (tree) *slot : NULL_TREE; | |
| 283 } | |
| 284 | |
| 285 slot = pointer_map_insert (info->field_map, decl); | |
| 286 if (!*slot) | |
| 287 { | |
| 288 tree field = make_node (FIELD_DECL); | |
| 289 DECL_NAME (field) = DECL_NAME (decl); | |
| 290 | |
| 291 if (use_pointer_in_frame (decl)) | |
| 292 { | |
| 293 TREE_TYPE (field) = build_pointer_type (TREE_TYPE (decl)); | |
| 294 DECL_ALIGN (field) = TYPE_ALIGN (TREE_TYPE (field)); | |
| 295 DECL_NONADDRESSABLE_P (field) = 1; | |
| 296 } | |
| 297 else | |
| 298 { | |
| 299 TREE_TYPE (field) = TREE_TYPE (decl); | |
| 300 DECL_SOURCE_LOCATION (field) = DECL_SOURCE_LOCATION (decl); | |
| 301 DECL_ALIGN (field) = DECL_ALIGN (decl); | |
| 302 DECL_USER_ALIGN (field) = DECL_USER_ALIGN (decl); | |
| 303 TREE_ADDRESSABLE (field) = TREE_ADDRESSABLE (decl); | |
| 304 DECL_NONADDRESSABLE_P (field) = !TREE_ADDRESSABLE (decl); | |
| 305 TREE_THIS_VOLATILE (field) = TREE_THIS_VOLATILE (decl); | |
| 306 } | |
| 307 | |
| 308 insert_field_into_struct (get_frame_type (info), field); | |
| 309 *slot = field; | |
| 310 | |
| 311 if (TREE_CODE (decl) == PARM_DECL) | |
| 312 info->any_parm_remapped = true; | |
| 313 } | |
| 314 | |
| 315 return (tree) *slot; | |
| 316 } | |
| 317 | |
| 318 /* Build or return the variable that holds the static chain within | |
| 319 INFO->CONTEXT. This variable may only be used within INFO->CONTEXT. */ | |
| 320 | |
| 321 static tree | |
| 322 get_chain_decl (struct nesting_info *info) | |
| 323 { | |
| 324 tree decl = info->chain_decl; | |
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325 |
| 0 | 326 if (!decl) |
| 327 { | |
| 328 tree type; | |
| 329 | |
| 330 type = get_frame_type (info->outer); | |
| 331 type = build_pointer_type (type); | |
| 332 | |
| 333 /* Note that this variable is *not* entered into any BIND_EXPR; | |
| 334 the construction of this variable is handled specially in | |
| 335 expand_function_start and initialize_inlined_parameters. | |
| 336 Note also that it's represented as a parameter. This is more | |
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337 close to the truth, since the initial value does come from |
| 0 | 338 the caller. */ |
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339 decl = build_decl (DECL_SOURCE_LOCATION (info->context), |
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340 PARM_DECL, create_tmp_var_name ("CHAIN"), type); |
| 0 | 341 DECL_ARTIFICIAL (decl) = 1; |
| 342 DECL_IGNORED_P (decl) = 1; | |
| 343 TREE_USED (decl) = 1; | |
| 344 DECL_CONTEXT (decl) = info->context; | |
| 345 DECL_ARG_TYPE (decl) = type; | |
| 346 | |
| 347 /* Tell tree-inline.c that we never write to this variable, so | |
| 348 it can copy-prop the replacement value immediately. */ | |
| 349 TREE_READONLY (decl) = 1; | |
| 350 | |
| 351 info->chain_decl = decl; | |
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352 |
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353 if (dump_file |
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354 && (dump_flags & TDF_DETAILS) |
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355 && !DECL_STATIC_CHAIN (info->context)) |
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356 fprintf (dump_file, "Setting static-chain for %s\n", |
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357 lang_hooks.decl_printable_name (info->context, 2)); |
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358 |
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359 DECL_STATIC_CHAIN (info->context) = 1; |
| 0 | 360 } |
| 361 return decl; | |
| 362 } | |
| 363 | |
| 364 /* Build or return the field within the non-local frame state that holds | |
| 365 the static chain for INFO->CONTEXT. This is the way to walk back up | |
| 366 multiple nesting levels. */ | |
| 367 | |
| 368 static tree | |
| 369 get_chain_field (struct nesting_info *info) | |
| 370 { | |
| 371 tree field = info->chain_field; | |
|
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372 |
| 0 | 373 if (!field) |
| 374 { | |
| 375 tree type = build_pointer_type (get_frame_type (info->outer)); | |
| 376 | |
| 377 field = make_node (FIELD_DECL); | |
| 378 DECL_NAME (field) = get_identifier ("__chain"); | |
| 379 TREE_TYPE (field) = type; | |
| 380 DECL_ALIGN (field) = TYPE_ALIGN (type); | |
| 381 DECL_NONADDRESSABLE_P (field) = 1; | |
| 382 | |
| 383 insert_field_into_struct (get_frame_type (info), field); | |
| 384 | |
| 385 info->chain_field = field; | |
|
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386 |
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387 if (dump_file |
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388 && (dump_flags & TDF_DETAILS) |
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389 && !DECL_STATIC_CHAIN (info->context)) |
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390 fprintf (dump_file, "Setting static-chain for %s\n", |
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391 lang_hooks.decl_printable_name (info->context, 2)); |
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392 |
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393 DECL_STATIC_CHAIN (info->context) = 1; |
| 0 | 394 } |
| 395 return field; | |
| 396 } | |
| 397 | |
| 398 /* Initialize a new temporary with the GIMPLE_CALL STMT. */ | |
| 399 | |
| 400 static tree | |
| 401 init_tmp_var_with_call (struct nesting_info *info, gimple_stmt_iterator *gsi, | |
| 402 gimple call) | |
| 403 { | |
| 404 tree t; | |
| 405 | |
| 406 t = create_tmp_var_for (info, gimple_call_return_type (call), NULL); | |
| 407 gimple_call_set_lhs (call, t); | |
| 408 if (! gsi_end_p (*gsi)) | |
| 409 gimple_set_location (call, gimple_location (gsi_stmt (*gsi))); | |
| 410 gsi_insert_before (gsi, call, GSI_SAME_STMT); | |
| 411 | |
| 412 return t; | |
| 413 } | |
| 414 | |
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415 |
| 0 | 416 /* Copy EXP into a temporary. Allocate the temporary in the context of |
| 417 INFO and insert the initialization statement before GSI. */ | |
| 418 | |
| 419 static tree | |
| 420 init_tmp_var (struct nesting_info *info, tree exp, gimple_stmt_iterator *gsi) | |
| 421 { | |
| 422 tree t; | |
| 423 gimple stmt; | |
| 424 | |
| 425 t = create_tmp_var_for (info, TREE_TYPE (exp), NULL); | |
| 426 stmt = gimple_build_assign (t, exp); | |
| 427 if (! gsi_end_p (*gsi)) | |
| 428 gimple_set_location (stmt, gimple_location (gsi_stmt (*gsi))); | |
| 429 gsi_insert_before_without_update (gsi, stmt, GSI_SAME_STMT); | |
| 430 | |
| 431 return t; | |
| 432 } | |
| 433 | |
| 434 | |
| 435 /* Similarly, but only do so to force EXP to satisfy is_gimple_val. */ | |
| 436 | |
| 437 static tree | |
| 438 gsi_gimplify_val (struct nesting_info *info, tree exp, | |
| 439 gimple_stmt_iterator *gsi) | |
| 440 { | |
| 441 if (is_gimple_val (exp)) | |
| 442 return exp; | |
| 443 else | |
| 444 return init_tmp_var (info, exp, gsi); | |
| 445 } | |
| 446 | |
| 447 /* Similarly, but copy from the temporary and insert the statement | |
| 448 after the iterator. */ | |
| 449 | |
| 450 static tree | |
| 451 save_tmp_var (struct nesting_info *info, tree exp, gimple_stmt_iterator *gsi) | |
| 452 { | |
| 453 tree t; | |
| 454 gimple stmt; | |
| 455 | |
| 456 t = create_tmp_var_for (info, TREE_TYPE (exp), NULL); | |
| 457 stmt = gimple_build_assign (exp, t); | |
| 458 if (! gsi_end_p (*gsi)) | |
| 459 gimple_set_location (stmt, gimple_location (gsi_stmt (*gsi))); | |
| 460 gsi_insert_after_without_update (gsi, stmt, GSI_SAME_STMT); | |
| 461 | |
| 462 return t; | |
| 463 } | |
| 464 | |
| 465 /* Build or return the type used to represent a nested function trampoline. */ | |
| 466 | |
| 467 static GTY(()) tree trampoline_type; | |
| 468 | |
| 469 static tree | |
|
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470 get_trampoline_type (struct nesting_info *info) |
| 0 | 471 { |
| 472 unsigned align, size; | |
| 473 tree t; | |
| 474 | |
| 475 if (trampoline_type) | |
| 476 return trampoline_type; | |
| 477 | |
| 478 align = TRAMPOLINE_ALIGNMENT; | |
| 479 size = TRAMPOLINE_SIZE; | |
| 480 | |
| 481 /* If we won't be able to guarantee alignment simply via TYPE_ALIGN, | |
| 482 then allocate extra space so that we can do dynamic alignment. */ | |
| 483 if (align > STACK_BOUNDARY) | |
| 484 { | |
| 485 size += ((align/BITS_PER_UNIT) - 1) & -(STACK_BOUNDARY/BITS_PER_UNIT); | |
| 486 align = STACK_BOUNDARY; | |
| 487 } | |
| 488 | |
| 489 t = build_index_type (build_int_cst (NULL_TREE, size - 1)); | |
| 490 t = build_array_type (char_type_node, t); | |
|
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491 t = build_decl (DECL_SOURCE_LOCATION (info->context), |
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492 FIELD_DECL, get_identifier ("__data"), t); |
| 0 | 493 DECL_ALIGN (t) = align; |
| 494 DECL_USER_ALIGN (t) = 1; | |
| 495 | |
| 496 trampoline_type = make_node (RECORD_TYPE); | |
| 497 TYPE_NAME (trampoline_type) = get_identifier ("__builtin_trampoline"); | |
| 498 TYPE_FIELDS (trampoline_type) = t; | |
| 499 layout_type (trampoline_type); | |
| 500 DECL_CONTEXT (t) = trampoline_type; | |
| 501 | |
| 502 return trampoline_type; | |
| 503 } | |
| 504 | |
| 505 /* Given DECL, a nested function, find or create a field in the non-local | |
| 506 frame structure for a trampoline for this function. */ | |
| 507 | |
| 508 static tree | |
| 509 lookup_tramp_for_decl (struct nesting_info *info, tree decl, | |
| 510 enum insert_option insert) | |
| 511 { | |
| 512 void **slot; | |
| 513 | |
| 514 if (insert == NO_INSERT) | |
| 515 { | |
| 516 slot = pointer_map_contains (info->var_map, decl); | |
| 517 return slot ? (tree) *slot : NULL_TREE; | |
| 518 } | |
| 519 | |
| 520 slot = pointer_map_insert (info->var_map, decl); | |
| 521 if (!*slot) | |
| 522 { | |
| 523 tree field = make_node (FIELD_DECL); | |
| 524 DECL_NAME (field) = DECL_NAME (decl); | |
|
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525 TREE_TYPE (field) = get_trampoline_type (info); |
| 0 | 526 TREE_ADDRESSABLE (field) = 1; |
| 527 | |
| 528 insert_field_into_struct (get_frame_type (info), field); | |
| 529 *slot = field; | |
| 530 | |
| 531 info->any_tramp_created = true; | |
| 532 } | |
| 533 | |
| 534 return (tree) *slot; | |
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535 } |
| 0 | 536 |
| 537 /* Build or return the field within the non-local frame state that holds | |
| 538 the non-local goto "jmp_buf". The buffer itself is maintained by the | |
| 539 rtl middle-end as dynamic stack space is allocated. */ | |
| 540 | |
| 541 static tree | |
| 542 get_nl_goto_field (struct nesting_info *info) | |
| 543 { | |
| 544 tree field = info->nl_goto_field; | |
| 545 if (!field) | |
| 546 { | |
| 547 unsigned size; | |
| 548 tree type; | |
| 549 | |
| 550 /* For __builtin_nonlocal_goto, we need N words. The first is the | |
| 551 frame pointer, the rest is for the target's stack pointer save | |
| 552 area. The number of words is controlled by STACK_SAVEAREA_MODE; | |
| 553 not the best interface, but it'll do for now. */ | |
| 554 if (Pmode == ptr_mode) | |
| 555 type = ptr_type_node; | |
| 556 else | |
| 557 type = lang_hooks.types.type_for_mode (Pmode, 1); | |
| 558 | |
| 559 size = GET_MODE_SIZE (STACK_SAVEAREA_MODE (SAVE_NONLOCAL)); | |
| 560 size = size / GET_MODE_SIZE (Pmode); | |
| 561 size = size + 1; | |
| 562 | |
| 563 type = build_array_type | |
| 564 (type, build_index_type (build_int_cst (NULL_TREE, size))); | |
| 565 | |
| 566 field = make_node (FIELD_DECL); | |
| 567 DECL_NAME (field) = get_identifier ("__nl_goto_buf"); | |
| 568 TREE_TYPE (field) = type; | |
| 569 DECL_ALIGN (field) = TYPE_ALIGN (type); | |
| 570 TREE_ADDRESSABLE (field) = 1; | |
| 571 | |
| 572 insert_field_into_struct (get_frame_type (info), field); | |
| 573 | |
| 574 info->nl_goto_field = field; | |
| 575 } | |
| 576 | |
| 577 return field; | |
| 578 } | |
| 579 | |
| 580 /* Invoke CALLBACK on all statements of GIMPLE sequence SEQ. */ | |
| 581 | |
| 582 static void | |
| 583 walk_body (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 584 struct nesting_info *info, gimple_seq seq) | |
| 585 { | |
| 586 struct walk_stmt_info wi; | |
| 587 | |
| 588 memset (&wi, 0, sizeof (wi)); | |
| 589 wi.info = info; | |
| 590 wi.val_only = true; | |
| 591 walk_gimple_seq (seq, callback_stmt, callback_op, &wi); | |
| 592 } | |
| 593 | |
| 594 | |
| 595 /* Invoke CALLBACK_STMT/CALLBACK_OP on all statements of INFO->CONTEXT. */ | |
| 596 | |
| 597 static inline void | |
| 598 walk_function (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 599 struct nesting_info *info) | |
| 600 { | |
| 601 walk_body (callback_stmt, callback_op, info, gimple_body (info->context)); | |
| 602 } | |
| 603 | |
| 604 /* Invoke CALLBACK on a GIMPLE_OMP_FOR's init, cond, incr and pre-body. */ | |
| 605 | |
| 606 static void | |
| 607 walk_gimple_omp_for (gimple for_stmt, | |
| 608 walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 609 struct nesting_info *info) | |
| 610 { | |
| 611 struct walk_stmt_info wi; | |
| 612 gimple_seq seq; | |
| 613 tree t; | |
| 614 size_t i; | |
| 615 | |
| 616 walk_body (callback_stmt, callback_op, info, gimple_omp_for_pre_body (for_stmt)); | |
| 617 | |
| 618 seq = gimple_seq_alloc (); | |
| 619 memset (&wi, 0, sizeof (wi)); | |
| 620 wi.info = info; | |
| 621 wi.gsi = gsi_last (seq); | |
| 622 | |
| 623 for (i = 0; i < gimple_omp_for_collapse (for_stmt); i++) | |
| 624 { | |
| 625 wi.val_only = false; | |
| 626 walk_tree (gimple_omp_for_index_ptr (for_stmt, i), callback_op, | |
| 627 &wi, NULL); | |
| 628 wi.val_only = true; | |
| 629 wi.is_lhs = false; | |
| 630 walk_tree (gimple_omp_for_initial_ptr (for_stmt, i), callback_op, | |
| 631 &wi, NULL); | |
| 632 | |
| 633 wi.val_only = true; | |
| 634 wi.is_lhs = false; | |
| 635 walk_tree (gimple_omp_for_final_ptr (for_stmt, i), callback_op, | |
| 636 &wi, NULL); | |
| 637 | |
| 638 t = gimple_omp_for_incr (for_stmt, i); | |
| 639 gcc_assert (BINARY_CLASS_P (t)); | |
| 640 wi.val_only = false; | |
| 641 walk_tree (&TREE_OPERAND (t, 0), callback_op, &wi, NULL); | |
| 642 wi.val_only = true; | |
| 643 wi.is_lhs = false; | |
| 644 walk_tree (&TREE_OPERAND (t, 1), callback_op, &wi, NULL); | |
| 645 } | |
| 646 | |
| 647 if (gimple_seq_empty_p (seq)) | |
| 648 gimple_seq_free (seq); | |
| 649 else | |
| 650 { | |
| 651 gimple_seq pre_body = gimple_omp_for_pre_body (for_stmt); | |
| 652 annotate_all_with_location (seq, gimple_location (for_stmt)); | |
| 653 gimple_seq_add_seq (&pre_body, seq); | |
| 654 gimple_omp_for_set_pre_body (for_stmt, pre_body); | |
| 655 } | |
| 656 } | |
| 657 | |
| 658 /* Similarly for ROOT and all functions nested underneath, depth first. */ | |
|
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659 |
| 0 | 660 static void |
| 661 walk_all_functions (walk_stmt_fn callback_stmt, walk_tree_fn callback_op, | |
| 662 struct nesting_info *root) | |
| 663 { | |
|
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664 struct nesting_info *n; |
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665 FOR_EACH_NEST_INFO (n, root) |
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666 walk_function (callback_stmt, callback_op, n); |
| 0 | 667 } |
| 668 | |
| 669 | |
| 670 /* We have to check for a fairly pathological case. The operands of function | |
| 671 nested function are to be interpreted in the context of the enclosing | |
| 672 function. So if any are variably-sized, they will get remapped when the | |
| 673 enclosing function is inlined. But that remapping would also have to be | |
| 674 done in the types of the PARM_DECLs of the nested function, meaning the | |
| 675 argument types of that function will disagree with the arguments in the | |
| 676 calls to that function. So we'd either have to make a copy of the nested | |
| 677 function corresponding to each time the enclosing function was inlined or | |
| 678 add a VIEW_CONVERT_EXPR to each such operand for each call to the nested | |
| 679 function. The former is not practical. The latter would still require | |
| 680 detecting this case to know when to add the conversions. So, for now at | |
| 681 least, we don't inline such an enclosing function. | |
| 682 | |
| 683 We have to do that check recursively, so here return indicating whether | |
| 684 FNDECL has such a nested function. ORIG_FN is the function we were | |
| 685 trying to inline to use for checking whether any argument is variably | |
| 686 modified by anything in it. | |
| 687 | |
| 688 It would be better to do this in tree-inline.c so that we could give | |
| 689 the appropriate warning for why a function can't be inlined, but that's | |
| 690 too late since the nesting structure has already been flattened and | |
| 691 adding a flag just to record this fact seems a waste of a flag. */ | |
| 692 | |
| 693 static bool | |
| 694 check_for_nested_with_variably_modified (tree fndecl, tree orig_fndecl) | |
| 695 { | |
| 696 struct cgraph_node *cgn = cgraph_node (fndecl); | |
| 697 tree arg; | |
| 698 | |
| 699 for (cgn = cgn->nested; cgn ; cgn = cgn->next_nested) | |
| 700 { | |
|
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701 for (arg = DECL_ARGUMENTS (cgn->decl); arg; arg = DECL_CHAIN (arg)) |
| 0 | 702 if (variably_modified_type_p (TREE_TYPE (arg), orig_fndecl)) |
| 703 return true; | |
| 704 | |
| 705 if (check_for_nested_with_variably_modified (cgn->decl, orig_fndecl)) | |
| 706 return true; | |
| 707 } | |
| 708 | |
| 709 return false; | |
| 710 } | |
| 711 | |
| 712 /* Construct our local datastructure describing the function nesting | |
| 713 tree rooted by CGN. */ | |
| 714 | |
| 715 static struct nesting_info * | |
| 716 create_nesting_tree (struct cgraph_node *cgn) | |
| 717 { | |
| 718 struct nesting_info *info = XCNEW (struct nesting_info); | |
| 719 info->field_map = pointer_map_create (); | |
| 720 info->var_map = pointer_map_create (); | |
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721 info->mem_refs = pointer_set_create (); |
| 0 | 722 info->suppress_expansion = BITMAP_ALLOC (&nesting_info_bitmap_obstack); |
| 723 info->context = cgn->decl; | |
| 724 | |
| 725 for (cgn = cgn->nested; cgn ; cgn = cgn->next_nested) | |
| 726 { | |
| 727 struct nesting_info *sub = create_nesting_tree (cgn); | |
| 728 sub->outer = info; | |
| 729 sub->next = info->inner; | |
| 730 info->inner = sub; | |
| 731 } | |
| 732 | |
| 733 /* See discussion at check_for_nested_with_variably_modified for a | |
| 734 discussion of why this has to be here. */ | |
| 735 if (check_for_nested_with_variably_modified (info->context, info->context)) | |
| 736 DECL_UNINLINABLE (info->context) = true; | |
| 737 | |
| 738 return info; | |
| 739 } | |
| 740 | |
| 741 /* Return an expression computing the static chain for TARGET_CONTEXT | |
| 742 from INFO->CONTEXT. Insert any necessary computations before TSI. */ | |
| 743 | |
| 744 static tree | |
| 745 get_static_chain (struct nesting_info *info, tree target_context, | |
| 746 gimple_stmt_iterator *gsi) | |
| 747 { | |
| 748 struct nesting_info *i; | |
| 749 tree x; | |
| 750 | |
| 751 if (info->context == target_context) | |
| 752 { | |
| 753 x = build_addr (info->frame_decl, target_context); | |
| 754 } | |
| 755 else | |
| 756 { | |
| 757 x = get_chain_decl (info); | |
| 758 | |
| 759 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 760 { | |
| 761 tree field = get_chain_field (i); | |
| 762 | |
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763 x = build_simple_mem_ref (x); |
| 0 | 764 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| 765 x = init_tmp_var (info, x, gsi); | |
| 766 } | |
| 767 } | |
| 768 | |
| 769 return x; | |
| 770 } | |
| 771 | |
| 772 | |
| 773 /* Return an expression referencing FIELD from TARGET_CONTEXT's non-local | |
| 774 frame as seen from INFO->CONTEXT. Insert any necessary computations | |
| 775 before GSI. */ | |
| 776 | |
| 777 static tree | |
| 778 get_frame_field (struct nesting_info *info, tree target_context, | |
| 779 tree field, gimple_stmt_iterator *gsi) | |
| 780 { | |
| 781 struct nesting_info *i; | |
| 782 tree x; | |
| 783 | |
| 784 if (info->context == target_context) | |
| 785 { | |
| 786 /* Make sure frame_decl gets created. */ | |
| 787 (void) get_frame_type (info); | |
| 788 x = info->frame_decl; | |
| 789 } | |
| 790 else | |
| 791 { | |
| 792 x = get_chain_decl (info); | |
| 793 | |
| 794 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 795 { | |
| 796 tree field = get_chain_field (i); | |
| 797 | |
|
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798 x = build_simple_mem_ref (x); |
| 0 | 799 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| 800 x = init_tmp_var (info, x, gsi); | |
| 801 } | |
| 802 | |
|
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803 x = build_simple_mem_ref (x); |
| 0 | 804 } |
| 805 | |
| 806 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 807 return x; | |
| 808 } | |
| 809 | |
|
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810 static void note_nonlocal_vla_type (struct nesting_info *info, tree type); |
| 0 | 811 |
| 812 /* A subroutine of convert_nonlocal_reference_op. Create a local variable | |
| 813 in the nested function with DECL_VALUE_EXPR set to reference the true | |
|
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814 variable in the parent function. This is used both for debug info |
| 0 | 815 and in OpenMP lowering. */ |
| 816 | |
| 817 static tree | |
| 818 get_nonlocal_debug_decl (struct nesting_info *info, tree decl) | |
| 819 { | |
| 820 tree target_context; | |
| 821 struct nesting_info *i; | |
| 822 tree x, field, new_decl; | |
| 823 void **slot; | |
| 824 | |
| 825 slot = pointer_map_insert (info->var_map, decl); | |
| 826 | |
| 827 if (*slot) | |
| 828 return (tree) *slot; | |
| 829 | |
| 830 target_context = decl_function_context (decl); | |
| 831 | |
| 832 /* A copy of the code in get_frame_field, but without the temporaries. */ | |
| 833 if (info->context == target_context) | |
| 834 { | |
| 835 /* Make sure frame_decl gets created. */ | |
| 836 (void) get_frame_type (info); | |
| 837 x = info->frame_decl; | |
| 838 i = info; | |
| 839 } | |
| 840 else | |
| 841 { | |
| 842 x = get_chain_decl (info); | |
| 843 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 844 { | |
| 845 field = get_chain_field (i); | |
|
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846 x = build_simple_mem_ref (x); |
| 0 | 847 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); |
| 848 } | |
|
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849 x = build_simple_mem_ref (x); |
| 0 | 850 } |
| 851 | |
| 852 field = lookup_field_for_decl (i, decl, INSERT); | |
| 853 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 854 if (use_pointer_in_frame (decl)) | |
|
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855 x = build_simple_mem_ref (x); |
| 0 | 856 |
| 857 /* ??? We should be remapping types as well, surely. */ | |
|
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858 new_decl = build_decl (DECL_SOURCE_LOCATION (decl), |
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859 VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); |
| 0 | 860 DECL_CONTEXT (new_decl) = info->context; |
| 861 DECL_ARTIFICIAL (new_decl) = DECL_ARTIFICIAL (decl); | |
| 862 DECL_IGNORED_P (new_decl) = DECL_IGNORED_P (decl); | |
| 863 TREE_THIS_VOLATILE (new_decl) = TREE_THIS_VOLATILE (decl); | |
| 864 TREE_SIDE_EFFECTS (new_decl) = TREE_SIDE_EFFECTS (decl); | |
| 865 TREE_READONLY (new_decl) = TREE_READONLY (decl); | |
| 866 TREE_ADDRESSABLE (new_decl) = TREE_ADDRESSABLE (decl); | |
| 867 DECL_SEEN_IN_BIND_EXPR_P (new_decl) = 1; | |
|
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868 if ((TREE_CODE (decl) == PARM_DECL |
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869 || TREE_CODE (decl) == RESULT_DECL |
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870 || TREE_CODE (decl) == VAR_DECL) |
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871 && DECL_BY_REFERENCE (decl)) |
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872 DECL_BY_REFERENCE (new_decl) = 1; |
| 0 | 873 |
| 874 SET_DECL_VALUE_EXPR (new_decl, x); | |
| 875 DECL_HAS_VALUE_EXPR_P (new_decl) = 1; | |
| 876 | |
| 877 *slot = new_decl; | |
|
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878 DECL_CHAIN (new_decl) = info->debug_var_chain; |
| 0 | 879 info->debug_var_chain = new_decl; |
| 880 | |
|
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881 if (!optimize |
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882 && info->context != target_context |
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883 && variably_modified_type_p (TREE_TYPE (decl), NULL)) |
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884 note_nonlocal_vla_type (info, TREE_TYPE (decl)); |
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885 |
| 0 | 886 return new_decl; |
| 887 } | |
| 888 | |
| 889 | |
| 890 /* Callback for walk_gimple_stmt, rewrite all references to VAR | |
| 891 and PARM_DECLs that belong to outer functions. | |
| 892 | |
| 893 The rewrite will involve some number of structure accesses back up | |
| 894 the static chain. E.g. for a variable FOO up one nesting level it'll | |
| 895 be CHAIN->FOO. For two levels it'll be CHAIN->__chain->FOO. Further | |
| 896 indirections apply to decls for which use_pointer_in_frame is true. */ | |
| 897 | |
| 898 static tree | |
| 899 convert_nonlocal_reference_op (tree *tp, int *walk_subtrees, void *data) | |
| 900 { | |
| 901 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
| 902 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 903 tree t = *tp; | |
| 904 | |
| 905 *walk_subtrees = 0; | |
| 906 switch (TREE_CODE (t)) | |
| 907 { | |
| 908 case VAR_DECL: | |
| 909 /* Non-automatic variables are never processed. */ | |
| 910 if (TREE_STATIC (t) || DECL_EXTERNAL (t)) | |
| 911 break; | |
| 912 /* FALLTHRU */ | |
| 913 | |
| 914 case PARM_DECL: | |
| 915 if (decl_function_context (t) != info->context) | |
| 916 { | |
| 917 tree x; | |
| 918 wi->changed = true; | |
| 919 | |
| 920 x = get_nonlocal_debug_decl (info, t); | |
| 921 if (!bitmap_bit_p (info->suppress_expansion, DECL_UID (t))) | |
| 922 { | |
| 923 tree target_context = decl_function_context (t); | |
| 924 struct nesting_info *i; | |
| 925 for (i = info->outer; i->context != target_context; i = i->outer) | |
| 926 continue; | |
| 927 x = lookup_field_for_decl (i, t, INSERT); | |
| 928 x = get_frame_field (info, target_context, x, &wi->gsi); | |
| 929 if (use_pointer_in_frame (t)) | |
| 930 { | |
| 931 x = init_tmp_var (info, x, &wi->gsi); | |
|
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932 x = build_simple_mem_ref (x); |
| 0 | 933 } |
| 934 } | |
| 935 | |
| 936 if (wi->val_only) | |
| 937 { | |
| 938 if (wi->is_lhs) | |
| 939 x = save_tmp_var (info, x, &wi->gsi); | |
| 940 else | |
| 941 x = init_tmp_var (info, x, &wi->gsi); | |
| 942 } | |
| 943 | |
| 944 *tp = x; | |
| 945 } | |
| 946 break; | |
| 947 | |
| 948 case LABEL_DECL: | |
| 949 /* We're taking the address of a label from a parent function, but | |
| 950 this is not itself a non-local goto. Mark the label such that it | |
| 951 will not be deleted, much as we would with a label address in | |
| 952 static storage. */ | |
| 953 if (decl_function_context (t) != info->context) | |
| 954 FORCED_LABEL (t) = 1; | |
| 955 break; | |
| 956 | |
| 957 case ADDR_EXPR: | |
| 958 { | |
| 959 bool save_val_only = wi->val_only; | |
| 960 | |
| 961 wi->val_only = false; | |
| 962 wi->is_lhs = false; | |
| 963 wi->changed = false; | |
| 964 walk_tree (&TREE_OPERAND (t, 0), convert_nonlocal_reference_op, wi, 0); | |
| 965 wi->val_only = true; | |
| 966 | |
| 967 if (wi->changed) | |
| 968 { | |
| 969 tree save_context; | |
| 970 | |
| 971 /* If we changed anything, we might no longer be directly | |
| 972 referencing a decl. */ | |
| 973 save_context = current_function_decl; | |
| 974 current_function_decl = info->context; | |
| 975 recompute_tree_invariant_for_addr_expr (t); | |
| 976 current_function_decl = save_context; | |
| 977 | |
| 978 /* If the callback converted the address argument in a context | |
| 979 where we only accept variables (and min_invariant, presumably), | |
| 980 then compute the address into a temporary. */ | |
| 981 if (save_val_only) | |
| 982 *tp = gsi_gimplify_val ((struct nesting_info *) wi->info, | |
| 983 t, &wi->gsi); | |
| 984 } | |
| 985 } | |
| 986 break; | |
| 987 | |
| 988 case REALPART_EXPR: | |
| 989 case IMAGPART_EXPR: | |
| 990 case COMPONENT_REF: | |
| 991 case ARRAY_REF: | |
| 992 case ARRAY_RANGE_REF: | |
| 993 case BIT_FIELD_REF: | |
| 994 /* Go down this entire nest and just look at the final prefix and | |
| 995 anything that describes the references. Otherwise, we lose track | |
| 996 of whether a NOP_EXPR or VIEW_CONVERT_EXPR needs a simple value. */ | |
| 997 wi->val_only = true; | |
| 998 wi->is_lhs = false; | |
| 999 for (; handled_component_p (t); tp = &TREE_OPERAND (t, 0), t = *tp) | |
| 1000 { | |
| 1001 if (TREE_CODE (t) == COMPONENT_REF) | |
| 1002 walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, wi, | |
| 1003 NULL); | |
| 1004 else if (TREE_CODE (t) == ARRAY_REF | |
| 1005 || TREE_CODE (t) == ARRAY_RANGE_REF) | |
| 1006 { | |
| 1007 walk_tree (&TREE_OPERAND (t, 1), convert_nonlocal_reference_op, | |
| 1008 wi, NULL); | |
| 1009 walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, | |
| 1010 wi, NULL); | |
| 1011 walk_tree (&TREE_OPERAND (t, 3), convert_nonlocal_reference_op, | |
| 1012 wi, NULL); | |
| 1013 } | |
| 1014 else if (TREE_CODE (t) == BIT_FIELD_REF) | |
| 1015 { | |
| 1016 walk_tree (&TREE_OPERAND (t, 1), convert_nonlocal_reference_op, | |
| 1017 wi, NULL); | |
| 1018 walk_tree (&TREE_OPERAND (t, 2), convert_nonlocal_reference_op, | |
| 1019 wi, NULL); | |
| 1020 } | |
| 1021 } | |
| 1022 wi->val_only = false; | |
| 1023 walk_tree (tp, convert_nonlocal_reference_op, wi, NULL); | |
| 1024 break; | |
| 1025 | |
| 1026 case VIEW_CONVERT_EXPR: | |
| 1027 /* Just request to look at the subtrees, leaving val_only and lhs | |
| 1028 untouched. This might actually be for !val_only + lhs, in which | |
| 1029 case we don't want to force a replacement by a temporary. */ | |
| 1030 *walk_subtrees = 1; | |
| 1031 break; | |
| 1032 | |
| 1033 default: | |
| 1034 if (!IS_TYPE_OR_DECL_P (t)) | |
| 1035 { | |
| 1036 *walk_subtrees = 1; | |
| 1037 wi->val_only = true; | |
| 1038 wi->is_lhs = false; | |
| 1039 } | |
| 1040 break; | |
| 1041 } | |
| 1042 | |
| 1043 return NULL_TREE; | |
| 1044 } | |
| 1045 | |
| 1046 static tree convert_nonlocal_reference_stmt (gimple_stmt_iterator *, bool *, | |
| 1047 struct walk_stmt_info *); | |
| 1048 | |
| 1049 /* Helper for convert_nonlocal_references, rewrite all references to VAR | |
| 1050 and PARM_DECLs that belong to outer functions. */ | |
| 1051 | |
| 1052 static bool | |
| 1053 convert_nonlocal_omp_clauses (tree *pclauses, struct walk_stmt_info *wi) | |
| 1054 { | |
| 1055 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1056 bool need_chain = false, need_stmts = false; | |
| 1057 tree clause, decl; | |
| 1058 int dummy; | |
| 1059 bitmap new_suppress; | |
| 1060 | |
| 1061 new_suppress = BITMAP_GGC_ALLOC (); | |
| 1062 bitmap_copy (new_suppress, info->suppress_expansion); | |
| 1063 | |
| 1064 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1065 { | |
| 1066 switch (OMP_CLAUSE_CODE (clause)) | |
| 1067 { | |
| 1068 case OMP_CLAUSE_REDUCTION: | |
| 1069 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1070 need_stmts = true; | |
| 1071 goto do_decl_clause; | |
| 1072 | |
| 1073 case OMP_CLAUSE_LASTPRIVATE: | |
| 1074 if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)) | |
| 1075 need_stmts = true; | |
| 1076 goto do_decl_clause; | |
| 1077 | |
| 1078 case OMP_CLAUSE_PRIVATE: | |
| 1079 case OMP_CLAUSE_FIRSTPRIVATE: | |
| 1080 case OMP_CLAUSE_COPYPRIVATE: | |
| 1081 case OMP_CLAUSE_SHARED: | |
| 1082 do_decl_clause: | |
| 1083 decl = OMP_CLAUSE_DECL (clause); | |
| 1084 if (TREE_CODE (decl) == VAR_DECL | |
| 1085 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
| 1086 break; | |
| 1087 if (decl_function_context (decl) != info->context) | |
| 1088 { | |
| 1089 bitmap_set_bit (new_suppress, DECL_UID (decl)); | |
| 1090 OMP_CLAUSE_DECL (clause) = get_nonlocal_debug_decl (info, decl); | |
|
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1091 if (OMP_CLAUSE_CODE (clause) != OMP_CLAUSE_PRIVATE) |
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1092 need_chain = true; |
| 0 | 1093 } |
| 1094 break; | |
| 1095 | |
| 1096 case OMP_CLAUSE_SCHEDULE: | |
| 1097 if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL) | |
| 1098 break; | |
| 1099 /* FALLTHRU */ | |
| 1100 case OMP_CLAUSE_IF: | |
| 1101 case OMP_CLAUSE_NUM_THREADS: | |
| 1102 wi->val_only = true; | |
| 1103 wi->is_lhs = false; | |
| 1104 convert_nonlocal_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), | |
| 1105 &dummy, wi); | |
| 1106 break; | |
| 1107 | |
| 1108 case OMP_CLAUSE_NOWAIT: | |
| 1109 case OMP_CLAUSE_ORDERED: | |
| 1110 case OMP_CLAUSE_DEFAULT: | |
| 1111 case OMP_CLAUSE_COPYIN: | |
| 1112 case OMP_CLAUSE_COLLAPSE: | |
| 1113 case OMP_CLAUSE_UNTIED: | |
| 1114 break; | |
| 1115 | |
| 1116 default: | |
| 1117 gcc_unreachable (); | |
| 1118 } | |
| 1119 } | |
| 1120 | |
| 1121 info->suppress_expansion = new_suppress; | |
| 1122 | |
| 1123 if (need_stmts) | |
| 1124 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1125 switch (OMP_CLAUSE_CODE (clause)) | |
| 1126 { | |
| 1127 case OMP_CLAUSE_REDUCTION: | |
| 1128 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1129 { | |
| 1130 tree old_context | |
| 1131 = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)); | |
| 1132 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1133 = info->context; | |
| 1134 walk_body (convert_nonlocal_reference_stmt, | |
| 1135 convert_nonlocal_reference_op, info, | |
| 1136 OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause)); | |
| 1137 walk_body (convert_nonlocal_reference_stmt, | |
| 1138 convert_nonlocal_reference_op, info, | |
| 1139 OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause)); | |
| 1140 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1141 = old_context; | |
| 1142 } | |
| 1143 break; | |
| 1144 | |
| 1145 case OMP_CLAUSE_LASTPRIVATE: | |
| 1146 walk_body (convert_nonlocal_reference_stmt, | |
| 1147 convert_nonlocal_reference_op, info, | |
| 1148 OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)); | |
| 1149 break; | |
| 1150 | |
| 1151 default: | |
| 1152 break; | |
| 1153 } | |
| 1154 | |
| 1155 return need_chain; | |
| 1156 } | |
| 1157 | |
|
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1158 /* Create nonlocal debug decls for nonlocal VLA array bounds. */ |
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1159 |
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1160 static void |
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1161 note_nonlocal_vla_type (struct nesting_info *info, tree type) |
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1162 { |
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1163 while (POINTER_TYPE_P (type) && !TYPE_NAME (type)) |
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1164 type = TREE_TYPE (type); |
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1165 |
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1166 if (TYPE_NAME (type) |
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1167 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL |
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1168 && DECL_ORIGINAL_TYPE (TYPE_NAME (type))) |
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1169 type = DECL_ORIGINAL_TYPE (TYPE_NAME (type)); |
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1170 |
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1171 while (POINTER_TYPE_P (type) |
|
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1172 || TREE_CODE (type) == VECTOR_TYPE |
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1173 || TREE_CODE (type) == FUNCTION_TYPE |
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1174 || TREE_CODE (type) == METHOD_TYPE) |
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1175 type = TREE_TYPE (type); |
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1176 |
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1177 if (TREE_CODE (type) == ARRAY_TYPE) |
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1178 { |
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1179 tree domain, t; |
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1180 |
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1181 note_nonlocal_vla_type (info, TREE_TYPE (type)); |
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1182 domain = TYPE_DOMAIN (type); |
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1183 if (domain) |
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1184 { |
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1185 t = TYPE_MIN_VALUE (domain); |
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1186 if (t && (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == PARM_DECL) |
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1187 && decl_function_context (t) != info->context) |
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1188 get_nonlocal_debug_decl (info, t); |
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1189 t = TYPE_MAX_VALUE (domain); |
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1190 if (t && (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == PARM_DECL) |
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1191 && decl_function_context (t) != info->context) |
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1192 get_nonlocal_debug_decl (info, t); |
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1193 } |
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1194 } |
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1195 } |
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1196 |
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1197 /* Create nonlocal debug decls for nonlocal VLA array bounds for VLAs |
|
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1198 in BLOCK. */ |
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1199 |
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1200 static void |
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1201 note_nonlocal_block_vlas (struct nesting_info *info, tree block) |
|
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1202 { |
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1203 tree var; |
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1204 |
|
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1205 for (var = BLOCK_VARS (block); var; var = DECL_CHAIN (var)) |
|
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1206 if (TREE_CODE (var) == VAR_DECL |
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1207 && variably_modified_type_p (TREE_TYPE (var), NULL) |
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1208 && DECL_HAS_VALUE_EXPR_P (var) |
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1209 && decl_function_context (var) != info->context) |
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1210 note_nonlocal_vla_type (info, TREE_TYPE (var)); |
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1211 } |
| 0 | 1212 |
| 1213 /* Callback for walk_gimple_stmt. Rewrite all references to VAR and | |
| 1214 PARM_DECLs that belong to outer functions. This handles statements | |
| 1215 that are not handled via the standard recursion done in | |
| 1216 walk_gimple_stmt. STMT is the statement to examine, DATA is as in | |
| 1217 convert_nonlocal_reference_op. Set *HANDLED_OPS_P to true if all the | |
| 1218 operands of STMT have been handled by this function. */ | |
| 1219 | |
| 1220 static tree | |
| 1221 convert_nonlocal_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1222 struct walk_stmt_info *wi) | |
| 1223 { | |
| 1224 struct nesting_info *info = (struct nesting_info *) wi->info; | |
| 1225 tree save_local_var_chain; | |
| 1226 bitmap save_suppress; | |
| 1227 gimple stmt = gsi_stmt (*gsi); | |
| 1228 | |
| 1229 switch (gimple_code (stmt)) | |
| 1230 { | |
| 1231 case GIMPLE_GOTO: | |
| 1232 /* Don't walk non-local gotos for now. */ | |
| 1233 if (TREE_CODE (gimple_goto_dest (stmt)) != LABEL_DECL) | |
| 1234 { | |
| 1235 wi->val_only = true; | |
| 1236 wi->is_lhs = false; | |
| 1237 *handled_ops_p = true; | |
| 1238 return NULL_TREE; | |
| 1239 } | |
| 1240 break; | |
| 1241 | |
| 1242 case GIMPLE_OMP_PARALLEL: | |
| 1243 case GIMPLE_OMP_TASK: | |
| 1244 save_suppress = info->suppress_expansion; | |
| 1245 if (convert_nonlocal_omp_clauses (gimple_omp_taskreg_clauses_ptr (stmt), | |
| 1246 wi)) | |
| 1247 { | |
| 1248 tree c, decl; | |
| 1249 decl = get_chain_decl (info); | |
|
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1250 c = build_omp_clause (gimple_location (stmt), |
|
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1251 OMP_CLAUSE_FIRSTPRIVATE); |
| 0 | 1252 OMP_CLAUSE_DECL (c) = decl; |
| 1253 OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); | |
| 1254 gimple_omp_taskreg_set_clauses (stmt, c); | |
| 1255 } | |
| 1256 | |
| 1257 save_local_var_chain = info->new_local_var_chain; | |
| 1258 info->new_local_var_chain = NULL; | |
| 1259 | |
| 1260 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1261 info, gimple_omp_body (stmt)); | |
| 1262 | |
| 1263 if (info->new_local_var_chain) | |
| 1264 declare_vars (info->new_local_var_chain, | |
| 1265 gimple_seq_first_stmt (gimple_omp_body (stmt)), | |
| 1266 false); | |
| 1267 info->new_local_var_chain = save_local_var_chain; | |
| 1268 info->suppress_expansion = save_suppress; | |
| 1269 break; | |
| 1270 | |
| 1271 case GIMPLE_OMP_FOR: | |
| 1272 save_suppress = info->suppress_expansion; | |
| 1273 convert_nonlocal_omp_clauses (gimple_omp_for_clauses_ptr (stmt), wi); | |
| 1274 walk_gimple_omp_for (stmt, convert_nonlocal_reference_stmt, | |
| 1275 convert_nonlocal_reference_op, info); | |
| 1276 walk_body (convert_nonlocal_reference_stmt, | |
| 1277 convert_nonlocal_reference_op, info, gimple_omp_body (stmt)); | |
| 1278 info->suppress_expansion = save_suppress; | |
| 1279 break; | |
| 1280 | |
| 1281 case GIMPLE_OMP_SECTIONS: | |
| 1282 save_suppress = info->suppress_expansion; | |
| 1283 convert_nonlocal_omp_clauses (gimple_omp_sections_clauses_ptr (stmt), wi); | |
| 1284 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1285 info, gimple_omp_body (stmt)); | |
| 1286 info->suppress_expansion = save_suppress; | |
| 1287 break; | |
| 1288 | |
| 1289 case GIMPLE_OMP_SINGLE: | |
| 1290 save_suppress = info->suppress_expansion; | |
| 1291 convert_nonlocal_omp_clauses (gimple_omp_single_clauses_ptr (stmt), wi); | |
| 1292 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1293 info, gimple_omp_body (stmt)); | |
| 1294 info->suppress_expansion = save_suppress; | |
| 1295 break; | |
| 1296 | |
| 1297 case GIMPLE_OMP_SECTION: | |
| 1298 case GIMPLE_OMP_MASTER: | |
| 1299 case GIMPLE_OMP_ORDERED: | |
| 1300 walk_body (convert_nonlocal_reference_stmt, convert_nonlocal_reference_op, | |
| 1301 info, gimple_omp_body (stmt)); | |
| 1302 break; | |
| 1303 | |
|
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|
1304 case GIMPLE_BIND: |
|
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1305 if (!optimize && gimple_bind_block (stmt)) |
|
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1306 note_nonlocal_block_vlas (info, gimple_bind_block (stmt)); |
|
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1307 |
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1308 *handled_ops_p = false; |
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1309 return NULL_TREE; |
|
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1310 |
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1311 case GIMPLE_COND: |
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1312 wi->val_only = true; |
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1313 wi->is_lhs = false; |
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1314 *handled_ops_p = false; |
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1315 return NULL_TREE; |
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1316 |
| 0 | 1317 default: |
| 1318 /* For every other statement that we are not interested in | |
| 1319 handling here, let the walker traverse the operands. */ | |
| 1320 *handled_ops_p = false; | |
| 1321 return NULL_TREE; | |
| 1322 } | |
| 1323 | |
| 1324 /* We have handled all of STMT operands, no need to traverse the operands. */ | |
| 1325 *handled_ops_p = true; | |
| 1326 return NULL_TREE; | |
| 1327 } | |
| 1328 | |
| 1329 | |
| 1330 /* A subroutine of convert_local_reference. Create a local variable | |
| 1331 in the parent function with DECL_VALUE_EXPR set to reference the | |
| 1332 field in FRAME. This is used both for debug info and in OpenMP | |
| 1333 lowering. */ | |
| 1334 | |
| 1335 static tree | |
| 1336 get_local_debug_decl (struct nesting_info *info, tree decl, tree field) | |
| 1337 { | |
| 1338 tree x, new_decl; | |
| 1339 void **slot; | |
| 1340 | |
| 1341 slot = pointer_map_insert (info->var_map, decl); | |
| 1342 if (*slot) | |
| 1343 return (tree) *slot; | |
| 1344 | |
| 1345 /* Make sure frame_decl gets created. */ | |
| 1346 (void) get_frame_type (info); | |
| 1347 x = info->frame_decl; | |
| 1348 x = build3 (COMPONENT_REF, TREE_TYPE (field), x, field, NULL_TREE); | |
| 1349 | |
|
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1350 new_decl = build_decl (DECL_SOURCE_LOCATION (decl), |
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1351 VAR_DECL, DECL_NAME (decl), TREE_TYPE (decl)); |
| 0 | 1352 DECL_CONTEXT (new_decl) = info->context; |
| 1353 DECL_ARTIFICIAL (new_decl) = DECL_ARTIFICIAL (decl); | |
| 1354 DECL_IGNORED_P (new_decl) = DECL_IGNORED_P (decl); | |
| 1355 TREE_THIS_VOLATILE (new_decl) = TREE_THIS_VOLATILE (decl); | |
| 1356 TREE_SIDE_EFFECTS (new_decl) = TREE_SIDE_EFFECTS (decl); | |
| 1357 TREE_READONLY (new_decl) = TREE_READONLY (decl); | |
| 1358 TREE_ADDRESSABLE (new_decl) = TREE_ADDRESSABLE (decl); | |
| 1359 DECL_SEEN_IN_BIND_EXPR_P (new_decl) = 1; | |
|
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1360 if ((TREE_CODE (decl) == PARM_DECL |
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1361 || TREE_CODE (decl) == RESULT_DECL |
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1362 || TREE_CODE (decl) == VAR_DECL) |
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1363 && DECL_BY_REFERENCE (decl)) |
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1364 DECL_BY_REFERENCE (new_decl) = 1; |
| 0 | 1365 |
| 1366 SET_DECL_VALUE_EXPR (new_decl, x); | |
| 1367 DECL_HAS_VALUE_EXPR_P (new_decl) = 1; | |
| 1368 *slot = new_decl; | |
| 1369 | |
|
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1370 DECL_CHAIN (new_decl) = info->debug_var_chain; |
| 0 | 1371 info->debug_var_chain = new_decl; |
| 1372 | |
| 1373 /* Do not emit debug info twice. */ | |
| 1374 DECL_IGNORED_P (decl) = 1; | |
| 1375 | |
| 1376 return new_decl; | |
| 1377 } | |
| 1378 | |
| 1379 | |
| 1380 /* Called via walk_function+walk_gimple_stmt, rewrite all references to VAR | |
| 1381 and PARM_DECLs that were referenced by inner nested functions. | |
| 1382 The rewrite will be a structure reference to the local frame variable. */ | |
| 1383 | |
| 1384 static bool convert_local_omp_clauses (tree *, struct walk_stmt_info *); | |
| 1385 | |
| 1386 static tree | |
| 1387 convert_local_reference_op (tree *tp, int *walk_subtrees, void *data) | |
| 1388 { | |
| 1389 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
| 1390 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1391 tree t = *tp, field, x; | |
| 1392 bool save_val_only; | |
| 1393 | |
| 1394 *walk_subtrees = 0; | |
| 1395 switch (TREE_CODE (t)) | |
| 1396 { | |
| 1397 case VAR_DECL: | |
| 1398 /* Non-automatic variables are never processed. */ | |
| 1399 if (TREE_STATIC (t) || DECL_EXTERNAL (t)) | |
| 1400 break; | |
| 1401 /* FALLTHRU */ | |
| 1402 | |
| 1403 case PARM_DECL: | |
| 1404 if (decl_function_context (t) == info->context) | |
| 1405 { | |
| 1406 /* If we copied a pointer to the frame, then the original decl | |
| 1407 is used unchanged in the parent function. */ | |
| 1408 if (use_pointer_in_frame (t)) | |
| 1409 break; | |
| 1410 | |
| 1411 /* No need to transform anything if no child references the | |
| 1412 variable. */ | |
| 1413 field = lookup_field_for_decl (info, t, NO_INSERT); | |
| 1414 if (!field) | |
| 1415 break; | |
| 1416 wi->changed = true; | |
| 1417 | |
| 1418 x = get_local_debug_decl (info, t, field); | |
| 1419 if (!bitmap_bit_p (info->suppress_expansion, DECL_UID (t))) | |
| 1420 x = get_frame_field (info, info->context, field, &wi->gsi); | |
| 1421 | |
| 1422 if (wi->val_only) | |
| 1423 { | |
| 1424 if (wi->is_lhs) | |
| 1425 x = save_tmp_var (info, x, &wi->gsi); | |
| 1426 else | |
| 1427 x = init_tmp_var (info, x, &wi->gsi); | |
| 1428 } | |
| 1429 | |
| 1430 *tp = x; | |
| 1431 } | |
| 1432 break; | |
| 1433 | |
| 1434 case ADDR_EXPR: | |
| 1435 save_val_only = wi->val_only; | |
| 1436 wi->val_only = false; | |
| 1437 wi->is_lhs = false; | |
| 1438 wi->changed = false; | |
| 1439 walk_tree (&TREE_OPERAND (t, 0), convert_local_reference_op, wi, NULL); | |
| 1440 wi->val_only = save_val_only; | |
| 1441 | |
| 1442 /* If we converted anything ... */ | |
| 1443 if (wi->changed) | |
| 1444 { | |
| 1445 tree save_context; | |
| 1446 | |
| 1447 /* Then the frame decl is now addressable. */ | |
| 1448 TREE_ADDRESSABLE (info->frame_decl) = 1; | |
|
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1449 |
| 0 | 1450 save_context = current_function_decl; |
| 1451 current_function_decl = info->context; | |
| 1452 recompute_tree_invariant_for_addr_expr (t); | |
| 1453 current_function_decl = save_context; | |
| 1454 | |
| 1455 /* If we are in a context where we only accept values, then | |
| 1456 compute the address into a temporary. */ | |
| 1457 if (save_val_only) | |
| 1458 *tp = gsi_gimplify_val ((struct nesting_info *) wi->info, | |
| 1459 t, &wi->gsi); | |
| 1460 } | |
| 1461 break; | |
| 1462 | |
| 1463 case REALPART_EXPR: | |
| 1464 case IMAGPART_EXPR: | |
| 1465 case COMPONENT_REF: | |
| 1466 case ARRAY_REF: | |
| 1467 case ARRAY_RANGE_REF: | |
| 1468 case BIT_FIELD_REF: | |
| 1469 /* Go down this entire nest and just look at the final prefix and | |
| 1470 anything that describes the references. Otherwise, we lose track | |
| 1471 of whether a NOP_EXPR or VIEW_CONVERT_EXPR needs a simple value. */ | |
| 1472 save_val_only = wi->val_only; | |
| 1473 wi->val_only = true; | |
| 1474 wi->is_lhs = false; | |
| 1475 for (; handled_component_p (t); tp = &TREE_OPERAND (t, 0), t = *tp) | |
| 1476 { | |
| 1477 if (TREE_CODE (t) == COMPONENT_REF) | |
| 1478 walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, | |
| 1479 NULL); | |
| 1480 else if (TREE_CODE (t) == ARRAY_REF | |
| 1481 || TREE_CODE (t) == ARRAY_RANGE_REF) | |
| 1482 { | |
| 1483 walk_tree (&TREE_OPERAND (t, 1), convert_local_reference_op, wi, | |
| 1484 NULL); | |
| 1485 walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, | |
| 1486 NULL); | |
| 1487 walk_tree (&TREE_OPERAND (t, 3), convert_local_reference_op, wi, | |
| 1488 NULL); | |
| 1489 } | |
| 1490 else if (TREE_CODE (t) == BIT_FIELD_REF) | |
| 1491 { | |
| 1492 walk_tree (&TREE_OPERAND (t, 1), convert_local_reference_op, wi, | |
| 1493 NULL); | |
| 1494 walk_tree (&TREE_OPERAND (t, 2), convert_local_reference_op, wi, | |
| 1495 NULL); | |
| 1496 } | |
| 1497 } | |
| 1498 wi->val_only = false; | |
| 1499 walk_tree (tp, convert_local_reference_op, wi, NULL); | |
| 1500 wi->val_only = save_val_only; | |
| 1501 break; | |
| 1502 | |
|
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1503 case MEM_REF: |
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1504 save_val_only = wi->val_only; |
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1505 wi->val_only = true; |
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1506 wi->is_lhs = false; |
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1507 walk_tree (&TREE_OPERAND (t, 0), convert_local_reference_op, |
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1508 wi, NULL); |
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1509 /* We need to re-fold the MEM_REF as component references as |
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1510 part of a ADDR_EXPR address are not allowed. But we cannot |
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1511 fold here, as the chain record type is not yet finalized. */ |
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1512 if (TREE_CODE (TREE_OPERAND (t, 0)) == ADDR_EXPR |
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1513 && !DECL_P (TREE_OPERAND (TREE_OPERAND (t, 0), 0))) |
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1514 pointer_set_insert (info->mem_refs, tp); |
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1515 wi->val_only = save_val_only; |
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1516 break; |
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1517 |
| 0 | 1518 case VIEW_CONVERT_EXPR: |
| 1519 /* Just request to look at the subtrees, leaving val_only and lhs | |
| 1520 untouched. This might actually be for !val_only + lhs, in which | |
| 1521 case we don't want to force a replacement by a temporary. */ | |
| 1522 *walk_subtrees = 1; | |
| 1523 break; | |
| 1524 | |
| 1525 default: | |
| 1526 if (!IS_TYPE_OR_DECL_P (t)) | |
| 1527 { | |
| 1528 *walk_subtrees = 1; | |
| 1529 wi->val_only = true; | |
| 1530 wi->is_lhs = false; | |
| 1531 } | |
| 1532 break; | |
| 1533 } | |
| 1534 | |
| 1535 return NULL_TREE; | |
| 1536 } | |
| 1537 | |
| 1538 static tree convert_local_reference_stmt (gimple_stmt_iterator *, bool *, | |
| 1539 struct walk_stmt_info *); | |
| 1540 | |
| 1541 /* Helper for convert_local_reference. Convert all the references in | |
| 1542 the chain of clauses at *PCLAUSES. WI is as in convert_local_reference. */ | |
| 1543 | |
| 1544 static bool | |
| 1545 convert_local_omp_clauses (tree *pclauses, struct walk_stmt_info *wi) | |
| 1546 { | |
| 1547 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1548 bool need_frame = false, need_stmts = false; | |
| 1549 tree clause, decl; | |
| 1550 int dummy; | |
| 1551 bitmap new_suppress; | |
| 1552 | |
| 1553 new_suppress = BITMAP_GGC_ALLOC (); | |
| 1554 bitmap_copy (new_suppress, info->suppress_expansion); | |
| 1555 | |
| 1556 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1557 { | |
| 1558 switch (OMP_CLAUSE_CODE (clause)) | |
| 1559 { | |
| 1560 case OMP_CLAUSE_REDUCTION: | |
| 1561 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1562 need_stmts = true; | |
| 1563 goto do_decl_clause; | |
| 1564 | |
| 1565 case OMP_CLAUSE_LASTPRIVATE: | |
| 1566 if (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)) | |
| 1567 need_stmts = true; | |
| 1568 goto do_decl_clause; | |
| 1569 | |
| 1570 case OMP_CLAUSE_PRIVATE: | |
| 1571 case OMP_CLAUSE_FIRSTPRIVATE: | |
| 1572 case OMP_CLAUSE_COPYPRIVATE: | |
| 1573 case OMP_CLAUSE_SHARED: | |
| 1574 do_decl_clause: | |
| 1575 decl = OMP_CLAUSE_DECL (clause); | |
| 1576 if (TREE_CODE (decl) == VAR_DECL | |
| 1577 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
| 1578 break; | |
| 1579 if (decl_function_context (decl) == info->context | |
| 1580 && !use_pointer_in_frame (decl)) | |
| 1581 { | |
| 1582 tree field = lookup_field_for_decl (info, decl, NO_INSERT); | |
| 1583 if (field) | |
| 1584 { | |
| 1585 bitmap_set_bit (new_suppress, DECL_UID (decl)); | |
| 1586 OMP_CLAUSE_DECL (clause) | |
| 1587 = get_local_debug_decl (info, decl, field); | |
| 1588 need_frame = true; | |
| 1589 } | |
| 1590 } | |
| 1591 break; | |
| 1592 | |
| 1593 case OMP_CLAUSE_SCHEDULE: | |
| 1594 if (OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (clause) == NULL) | |
| 1595 break; | |
| 1596 /* FALLTHRU */ | |
| 1597 case OMP_CLAUSE_IF: | |
| 1598 case OMP_CLAUSE_NUM_THREADS: | |
| 1599 wi->val_only = true; | |
| 1600 wi->is_lhs = false; | |
| 1601 convert_local_reference_op (&OMP_CLAUSE_OPERAND (clause, 0), &dummy, | |
| 1602 wi); | |
| 1603 break; | |
| 1604 | |
| 1605 case OMP_CLAUSE_NOWAIT: | |
| 1606 case OMP_CLAUSE_ORDERED: | |
| 1607 case OMP_CLAUSE_DEFAULT: | |
| 1608 case OMP_CLAUSE_COPYIN: | |
| 1609 case OMP_CLAUSE_COLLAPSE: | |
| 1610 case OMP_CLAUSE_UNTIED: | |
| 1611 break; | |
| 1612 | |
| 1613 default: | |
| 1614 gcc_unreachable (); | |
| 1615 } | |
| 1616 } | |
| 1617 | |
| 1618 info->suppress_expansion = new_suppress; | |
| 1619 | |
| 1620 if (need_stmts) | |
| 1621 for (clause = *pclauses; clause ; clause = OMP_CLAUSE_CHAIN (clause)) | |
| 1622 switch (OMP_CLAUSE_CODE (clause)) | |
| 1623 { | |
| 1624 case OMP_CLAUSE_REDUCTION: | |
| 1625 if (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1626 { | |
| 1627 tree old_context | |
| 1628 = DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)); | |
| 1629 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1630 = info->context; | |
| 1631 walk_body (convert_local_reference_stmt, | |
| 1632 convert_local_reference_op, info, | |
| 1633 OMP_CLAUSE_REDUCTION_GIMPLE_INIT (clause)); | |
| 1634 walk_body (convert_local_reference_stmt, | |
| 1635 convert_local_reference_op, info, | |
| 1636 OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (clause)); | |
| 1637 DECL_CONTEXT (OMP_CLAUSE_REDUCTION_PLACEHOLDER (clause)) | |
| 1638 = old_context; | |
| 1639 } | |
| 1640 break; | |
| 1641 | |
| 1642 case OMP_CLAUSE_LASTPRIVATE: | |
| 1643 walk_body (convert_local_reference_stmt, | |
| 1644 convert_local_reference_op, info, | |
| 1645 OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (clause)); | |
| 1646 break; | |
| 1647 | |
| 1648 default: | |
| 1649 break; | |
| 1650 } | |
| 1651 | |
| 1652 return need_frame; | |
| 1653 } | |
| 1654 | |
| 1655 | |
| 1656 /* Called via walk_function+walk_gimple_stmt, rewrite all references to VAR | |
| 1657 and PARM_DECLs that were referenced by inner nested functions. | |
| 1658 The rewrite will be a structure reference to the local frame variable. */ | |
| 1659 | |
| 1660 static tree | |
| 1661 convert_local_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1662 struct walk_stmt_info *wi) | |
| 1663 { | |
| 1664 struct nesting_info *info = (struct nesting_info *) wi->info; | |
| 1665 tree save_local_var_chain; | |
| 1666 bitmap save_suppress; | |
| 1667 gimple stmt = gsi_stmt (*gsi); | |
| 1668 | |
| 1669 switch (gimple_code (stmt)) | |
| 1670 { | |
| 1671 case GIMPLE_OMP_PARALLEL: | |
| 1672 case GIMPLE_OMP_TASK: | |
| 1673 save_suppress = info->suppress_expansion; | |
| 1674 if (convert_local_omp_clauses (gimple_omp_taskreg_clauses_ptr (stmt), | |
| 1675 wi)) | |
| 1676 { | |
| 1677 tree c; | |
| 1678 (void) get_frame_type (info); | |
|
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1679 c = build_omp_clause (gimple_location (stmt), |
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1680 OMP_CLAUSE_SHARED); |
| 0 | 1681 OMP_CLAUSE_DECL (c) = info->frame_decl; |
| 1682 OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); | |
| 1683 gimple_omp_taskreg_set_clauses (stmt, c); | |
| 1684 } | |
| 1685 | |
| 1686 save_local_var_chain = info->new_local_var_chain; | |
| 1687 info->new_local_var_chain = NULL; | |
| 1688 | |
| 1689 walk_body (convert_local_reference_stmt, convert_local_reference_op, info, | |
| 1690 gimple_omp_body (stmt)); | |
| 1691 | |
| 1692 if (info->new_local_var_chain) | |
| 1693 declare_vars (info->new_local_var_chain, | |
| 1694 gimple_seq_first_stmt (gimple_omp_body (stmt)), false); | |
| 1695 info->new_local_var_chain = save_local_var_chain; | |
| 1696 info->suppress_expansion = save_suppress; | |
| 1697 break; | |
| 1698 | |
| 1699 case GIMPLE_OMP_FOR: | |
| 1700 save_suppress = info->suppress_expansion; | |
| 1701 convert_local_omp_clauses (gimple_omp_for_clauses_ptr (stmt), wi); | |
| 1702 walk_gimple_omp_for (stmt, convert_local_reference_stmt, | |
| 1703 convert_local_reference_op, info); | |
| 1704 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1705 info, gimple_omp_body (stmt)); | |
| 1706 info->suppress_expansion = save_suppress; | |
| 1707 break; | |
| 1708 | |
| 1709 case GIMPLE_OMP_SECTIONS: | |
| 1710 save_suppress = info->suppress_expansion; | |
| 1711 convert_local_omp_clauses (gimple_omp_sections_clauses_ptr (stmt), wi); | |
| 1712 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1713 info, gimple_omp_body (stmt)); | |
| 1714 info->suppress_expansion = save_suppress; | |
| 1715 break; | |
| 1716 | |
| 1717 case GIMPLE_OMP_SINGLE: | |
| 1718 save_suppress = info->suppress_expansion; | |
| 1719 convert_local_omp_clauses (gimple_omp_single_clauses_ptr (stmt), wi); | |
| 1720 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1721 info, gimple_omp_body (stmt)); | |
| 1722 info->suppress_expansion = save_suppress; | |
| 1723 break; | |
| 1724 | |
| 1725 case GIMPLE_OMP_SECTION: | |
| 1726 case GIMPLE_OMP_MASTER: | |
| 1727 case GIMPLE_OMP_ORDERED: | |
| 1728 walk_body (convert_local_reference_stmt, convert_local_reference_op, | |
| 1729 info, gimple_omp_body (stmt)); | |
| 1730 break; | |
| 1731 | |
|
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1732 case GIMPLE_COND: |
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1733 wi->val_only = true; |
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1734 wi->is_lhs = false; |
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1735 *handled_ops_p = false; |
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1736 return NULL_TREE; |
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1737 |
| 0 | 1738 default: |
| 1739 /* For every other statement that we are not interested in | |
| 1740 handling here, let the walker traverse the operands. */ | |
| 1741 *handled_ops_p = false; | |
| 1742 return NULL_TREE; | |
| 1743 } | |
| 1744 | |
| 1745 /* Indicate that we have handled all the operands ourselves. */ | |
| 1746 *handled_ops_p = true; | |
| 1747 return NULL_TREE; | |
| 1748 } | |
| 1749 | |
| 1750 | |
| 1751 /* Called via walk_function+walk_gimple_stmt, rewrite all GIMPLE_GOTOs | |
| 1752 that reference labels from outer functions. The rewrite will be a | |
| 1753 call to __builtin_nonlocal_goto. */ | |
| 1754 | |
| 1755 static tree | |
| 1756 convert_nl_goto_reference (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1757 struct walk_stmt_info *wi) | |
| 1758 { | |
| 1759 struct nesting_info *const info = (struct nesting_info *) wi->info, *i; | |
| 1760 tree label, new_label, target_context, x, field; | |
| 1761 void **slot; | |
| 1762 gimple call; | |
| 1763 gimple stmt = gsi_stmt (*gsi); | |
| 1764 | |
| 1765 if (gimple_code (stmt) != GIMPLE_GOTO) | |
| 1766 { | |
| 1767 *handled_ops_p = false; | |
| 1768 return NULL_TREE; | |
| 1769 } | |
| 1770 | |
| 1771 label = gimple_goto_dest (stmt); | |
| 1772 if (TREE_CODE (label) != LABEL_DECL) | |
| 1773 { | |
| 1774 *handled_ops_p = false; | |
| 1775 return NULL_TREE; | |
| 1776 } | |
| 1777 | |
| 1778 target_context = decl_function_context (label); | |
| 1779 if (target_context == info->context) | |
| 1780 { | |
| 1781 *handled_ops_p = false; | |
| 1782 return NULL_TREE; | |
| 1783 } | |
| 1784 | |
| 1785 for (i = info->outer; target_context != i->context; i = i->outer) | |
| 1786 continue; | |
| 1787 | |
| 1788 /* The original user label may also be use for a normal goto, therefore | |
| 1789 we must create a new label that will actually receive the abnormal | |
| 1790 control transfer. This new label will be marked LABEL_NONLOCAL; this | |
| 1791 mark will trigger proper behavior in the cfg, as well as cause the | |
| 1792 (hairy target-specific) non-local goto receiver code to be generated | |
| 1793 when we expand rtl. Enter this association into var_map so that we | |
| 1794 can insert the new label into the IL during a second pass. */ | |
| 1795 slot = pointer_map_insert (i->var_map, label); | |
| 1796 if (*slot == NULL) | |
| 1797 { | |
|
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1798 new_label = create_artificial_label (UNKNOWN_LOCATION); |
| 0 | 1799 DECL_NONLOCAL (new_label) = 1; |
| 1800 *slot = new_label; | |
| 1801 } | |
| 1802 else | |
| 1803 new_label = (tree) *slot; | |
|
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1804 |
| 0 | 1805 /* Build: __builtin_nl_goto(new_label, &chain->nl_goto_field). */ |
| 1806 field = get_nl_goto_field (i); | |
| 1807 x = get_frame_field (info, target_context, field, &wi->gsi); | |
| 1808 x = build_addr (x, target_context); | |
| 1809 x = gsi_gimplify_val (info, x, &wi->gsi); | |
| 1810 call = gimple_build_call (implicit_built_in_decls[BUILT_IN_NONLOCAL_GOTO], 2, | |
| 1811 build_addr (new_label, target_context), x); | |
| 1812 gsi_replace (&wi->gsi, call, false); | |
| 1813 | |
| 1814 /* We have handled all of STMT's operands, no need to keep going. */ | |
| 1815 *handled_ops_p = true; | |
| 1816 return NULL_TREE; | |
| 1817 } | |
| 1818 | |
| 1819 | |
| 1820 /* Called via walk_function+walk_tree, rewrite all GIMPLE_LABELs whose labels | |
| 1821 are referenced via nonlocal goto from a nested function. The rewrite | |
| 1822 will involve installing a newly generated DECL_NONLOCAL label, and | |
| 1823 (potentially) a branch around the rtl gunk that is assumed to be | |
| 1824 attached to such a label. */ | |
| 1825 | |
| 1826 static tree | |
| 1827 convert_nl_goto_receiver (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1828 struct walk_stmt_info *wi) | |
| 1829 { | |
| 1830 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1831 tree label, new_label; | |
| 1832 gimple_stmt_iterator tmp_gsi; | |
| 1833 void **slot; | |
| 1834 gimple stmt = gsi_stmt (*gsi); | |
| 1835 | |
| 1836 if (gimple_code (stmt) != GIMPLE_LABEL) | |
| 1837 { | |
| 1838 *handled_ops_p = false; | |
| 1839 return NULL_TREE; | |
| 1840 } | |
| 1841 | |
| 1842 label = gimple_label_label (stmt); | |
| 1843 | |
| 1844 slot = pointer_map_contains (info->var_map, label); | |
| 1845 if (!slot) | |
| 1846 { | |
| 1847 *handled_ops_p = false; | |
| 1848 return NULL_TREE; | |
| 1849 } | |
| 1850 | |
| 1851 /* If there's any possibility that the previous statement falls through, | |
| 1852 then we must branch around the new non-local label. */ | |
| 1853 tmp_gsi = wi->gsi; | |
| 1854 gsi_prev (&tmp_gsi); | |
| 1855 if (gsi_end_p (tmp_gsi) || gimple_stmt_may_fallthru (gsi_stmt (tmp_gsi))) | |
| 1856 { | |
| 1857 gimple stmt = gimple_build_goto (label); | |
| 1858 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
| 1859 } | |
| 1860 | |
| 1861 new_label = (tree) *slot; | |
| 1862 stmt = gimple_build_label (new_label); | |
| 1863 gsi_insert_before (gsi, stmt, GSI_SAME_STMT); | |
| 1864 | |
| 1865 *handled_ops_p = true; | |
| 1866 return NULL_TREE; | |
| 1867 } | |
| 1868 | |
| 1869 | |
| 1870 /* Called via walk_function+walk_stmt, rewrite all references to addresses | |
| 1871 of nested functions that require the use of trampolines. The rewrite | |
| 1872 will involve a reference a trampoline generated for the occasion. */ | |
| 1873 | |
| 1874 static tree | |
| 1875 convert_tramp_reference_op (tree *tp, int *walk_subtrees, void *data) | |
| 1876 { | |
| 1877 struct walk_stmt_info *wi = (struct walk_stmt_info *) data; | |
| 1878 struct nesting_info *const info = (struct nesting_info *) wi->info, *i; | |
| 1879 tree t = *tp, decl, target_context, x, builtin; | |
| 1880 gimple call; | |
| 1881 | |
| 1882 *walk_subtrees = 0; | |
| 1883 switch (TREE_CODE (t)) | |
| 1884 { | |
| 1885 case ADDR_EXPR: | |
| 1886 /* Build | |
| 1887 T.1 = &CHAIN->tramp; | |
| 1888 T.2 = __builtin_adjust_trampoline (T.1); | |
| 1889 T.3 = (func_type)T.2; | |
| 1890 */ | |
| 1891 | |
| 1892 decl = TREE_OPERAND (t, 0); | |
| 1893 if (TREE_CODE (decl) != FUNCTION_DECL) | |
| 1894 break; | |
| 1895 | |
| 1896 /* Only need to process nested functions. */ | |
| 1897 target_context = decl_function_context (decl); | |
| 1898 if (!target_context) | |
| 1899 break; | |
| 1900 | |
| 1901 /* If the nested function doesn't use a static chain, then | |
| 1902 it doesn't need a trampoline. */ | |
|
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1903 if (!DECL_STATIC_CHAIN (decl)) |
| 0 | 1904 break; |
| 1905 | |
| 1906 /* If we don't want a trampoline, then don't build one. */ | |
| 1907 if (TREE_NO_TRAMPOLINE (t)) | |
| 1908 break; | |
| 1909 | |
| 1910 /* Lookup the immediate parent of the callee, as that's where | |
| 1911 we need to insert the trampoline. */ | |
| 1912 for (i = info; i->context != target_context; i = i->outer) | |
| 1913 continue; | |
| 1914 x = lookup_tramp_for_decl (i, decl, INSERT); | |
| 1915 | |
| 1916 /* Compute the address of the field holding the trampoline. */ | |
| 1917 x = get_frame_field (info, target_context, x, &wi->gsi); | |
| 1918 x = build_addr (x, target_context); | |
| 1919 x = gsi_gimplify_val (info, x, &wi->gsi); | |
| 1920 | |
| 1921 /* Do machine-specific ugliness. Normally this will involve | |
| 1922 computing extra alignment, but it can really be anything. */ | |
| 1923 builtin = implicit_built_in_decls[BUILT_IN_ADJUST_TRAMPOLINE]; | |
| 1924 call = gimple_build_call (builtin, 1, x); | |
| 1925 x = init_tmp_var_with_call (info, &wi->gsi, call); | |
| 1926 | |
| 1927 /* Cast back to the proper function type. */ | |
| 1928 x = build1 (NOP_EXPR, TREE_TYPE (t), x); | |
| 1929 x = init_tmp_var (info, x, &wi->gsi); | |
| 1930 | |
| 1931 *tp = x; | |
| 1932 break; | |
| 1933 | |
| 1934 default: | |
| 1935 if (!IS_TYPE_OR_DECL_P (t)) | |
| 1936 *walk_subtrees = 1; | |
| 1937 break; | |
| 1938 } | |
| 1939 | |
| 1940 return NULL_TREE; | |
| 1941 } | |
| 1942 | |
| 1943 | |
| 1944 /* Called via walk_function+walk_gimple_stmt, rewrite all references | |
| 1945 to addresses of nested functions that require the use of | |
| 1946 trampolines. The rewrite will involve a reference a trampoline | |
| 1947 generated for the occasion. */ | |
| 1948 | |
| 1949 static tree | |
| 1950 convert_tramp_reference_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1951 struct walk_stmt_info *wi) | |
| 1952 { | |
| 1953 gimple stmt = gsi_stmt (*gsi); | |
| 1954 | |
| 1955 switch (gimple_code (stmt)) | |
| 1956 { | |
| 1957 case GIMPLE_CALL: | |
| 1958 { | |
| 1959 /* Only walk call arguments, lest we generate trampolines for | |
| 1960 direct calls. */ | |
| 1961 unsigned long i, nargs = gimple_call_num_args (stmt); | |
| 1962 for (i = 0; i < nargs; i++) | |
| 1963 walk_tree (gimple_call_arg_ptr (stmt, i), convert_tramp_reference_op, | |
| 1964 wi, NULL); | |
| 1965 | |
| 1966 *handled_ops_p = true; | |
| 1967 return NULL_TREE; | |
| 1968 } | |
| 1969 | |
| 1970 default: | |
| 1971 break; | |
| 1972 } | |
| 1973 | |
| 1974 *handled_ops_p = false; | |
| 1975 return NULL_TREE; | |
| 1976 } | |
| 1977 | |
| 1978 | |
| 1979 | |
| 1980 /* Called via walk_function+walk_gimple_stmt, rewrite all GIMPLE_CALLs | |
| 1981 that reference nested functions to make sure that the static chain | |
| 1982 is set up properly for the call. */ | |
| 1983 | |
| 1984 static tree | |
| 1985 convert_gimple_call (gimple_stmt_iterator *gsi, bool *handled_ops_p, | |
| 1986 struct walk_stmt_info *wi) | |
| 1987 { | |
| 1988 struct nesting_info *const info = (struct nesting_info *) wi->info; | |
| 1989 tree decl, target_context; | |
| 1990 char save_static_chain_added; | |
| 1991 int i; | |
| 1992 gimple stmt = gsi_stmt (*gsi); | |
| 1993 | |
| 1994 switch (gimple_code (stmt)) | |
| 1995 { | |
| 1996 case GIMPLE_CALL: | |
|
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1997 if (gimple_call_chain (stmt)) |
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1998 break; |
| 0 | 1999 decl = gimple_call_fndecl (stmt); |
| 2000 if (!decl) | |
| 2001 break; | |
| 2002 target_context = decl_function_context (decl); | |
|
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2003 if (target_context && DECL_STATIC_CHAIN (decl)) |
| 0 | 2004 { |
| 2005 gimple_call_set_chain (stmt, get_static_chain (info, target_context, | |
| 2006 &wi->gsi)); | |
| 2007 info->static_chain_added |= (1 << (info->context != target_context)); | |
| 2008 } | |
| 2009 break; | |
| 2010 | |
| 2011 case GIMPLE_OMP_PARALLEL: | |
| 2012 case GIMPLE_OMP_TASK: | |
| 2013 save_static_chain_added = info->static_chain_added; | |
| 2014 info->static_chain_added = 0; | |
| 2015 walk_body (convert_gimple_call, NULL, info, gimple_omp_body (stmt)); | |
| 2016 for (i = 0; i < 2; i++) | |
| 2017 { | |
| 2018 tree c, decl; | |
| 2019 if ((info->static_chain_added & (1 << i)) == 0) | |
| 2020 continue; | |
| 2021 decl = i ? get_chain_decl (info) : info->frame_decl; | |
| 2022 /* Don't add CHAIN.* or FRAME.* twice. */ | |
| 2023 for (c = gimple_omp_taskreg_clauses (stmt); | |
| 2024 c; | |
| 2025 c = OMP_CLAUSE_CHAIN (c)) | |
| 2026 if ((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_FIRSTPRIVATE | |
| 2027 || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED) | |
| 2028 && OMP_CLAUSE_DECL (c) == decl) | |
| 2029 break; | |
| 2030 if (c == NULL) | |
| 2031 { | |
|
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2032 c = build_omp_clause (gimple_location (stmt), |
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2033 i ? OMP_CLAUSE_FIRSTPRIVATE |
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2034 : OMP_CLAUSE_SHARED); |
| 0 | 2035 OMP_CLAUSE_DECL (c) = decl; |
| 2036 OMP_CLAUSE_CHAIN (c) = gimple_omp_taskreg_clauses (stmt); | |
| 2037 gimple_omp_taskreg_set_clauses (stmt, c); | |
| 2038 } | |
| 2039 } | |
| 2040 info->static_chain_added |= save_static_chain_added; | |
| 2041 break; | |
| 2042 | |
| 2043 case GIMPLE_OMP_FOR: | |
| 2044 walk_body (convert_gimple_call, NULL, info, | |
| 2045 gimple_omp_for_pre_body (stmt)); | |
| 2046 /* FALLTHRU */ | |
| 2047 case GIMPLE_OMP_SECTIONS: | |
| 2048 case GIMPLE_OMP_SECTION: | |
| 2049 case GIMPLE_OMP_SINGLE: | |
| 2050 case GIMPLE_OMP_MASTER: | |
| 2051 case GIMPLE_OMP_ORDERED: | |
| 2052 case GIMPLE_OMP_CRITICAL: | |
| 2053 walk_body (convert_gimple_call, NULL, info, gimple_omp_body (stmt)); | |
| 2054 break; | |
| 2055 | |
| 2056 default: | |
| 2057 /* Keep looking for other operands. */ | |
| 2058 *handled_ops_p = false; | |
| 2059 return NULL_TREE; | |
| 2060 } | |
| 2061 | |
| 2062 *handled_ops_p = true; | |
| 2063 return NULL_TREE; | |
| 2064 } | |
| 2065 | |
|
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2066 /* Walk the nesting tree starting with ROOT. Convert all trampolines and |
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2067 call expressions. At the same time, determine if a nested function |
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2068 actually uses its static chain; if not, remember that. */ |
| 0 | 2069 |
| 2070 static void | |
| 2071 convert_all_function_calls (struct nesting_info *root) | |
| 2072 { | |
|
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2073 unsigned int chain_count = 0, old_chain_count, iter_count; |
|
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2074 struct nesting_info *n; |
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2075 |
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2076 /* First, optimistically clear static_chain for all decls that haven't |
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2077 used the static chain already for variable access. */ |
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2078 FOR_EACH_NEST_INFO (n, root) |
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2079 { |
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2080 tree decl = n->context; |
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2081 if (!n->outer || (!n->chain_decl && !n->chain_field)) |
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2082 { |
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2083 DECL_STATIC_CHAIN (decl) = 0; |
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2084 if (dump_file && (dump_flags & TDF_DETAILS)) |
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2085 fprintf (dump_file, "Guessing no static-chain for %s\n", |
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2086 lang_hooks.decl_printable_name (decl, 2)); |
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2087 } |
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2088 else |
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2089 DECL_STATIC_CHAIN (decl) = 1; |
|
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2090 chain_count += DECL_STATIC_CHAIN (decl); |
|
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2091 } |
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2092 |
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2093 /* Walk the functions and perform transformations. Note that these |
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2094 transformations can induce new uses of the static chain, which in turn |
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2095 require re-examining all users of the decl. */ |
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2096 /* ??? It would make sense to try to use the call graph to speed this up, |
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2097 but the call graph hasn't really been built yet. Even if it did, we |
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2098 would still need to iterate in this loop since address-of references |
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2099 wouldn't show up in the callgraph anyway. */ |
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2100 iter_count = 0; |
| 0 | 2101 do |
| 2102 { | |
|
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2103 old_chain_count = chain_count; |
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2104 chain_count = 0; |
|
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2105 iter_count++; |
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2106 |
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2107 if (dump_file && (dump_flags & TDF_DETAILS)) |
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2108 fputc ('\n', dump_file); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2109 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2110 FOR_EACH_NEST_INFO (n, root) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2111 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2112 tree decl = n->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2113 walk_function (convert_tramp_reference_stmt, |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2114 convert_tramp_reference_op, n); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2115 walk_function (convert_gimple_call, NULL, n); |
|
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
|
2116 chain_count += DECL_STATIC_CHAIN (decl); |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2117 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2118 } |
|
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
|
2119 while (chain_count != old_chain_count); |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2120 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2121 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
|
2122 fprintf (dump_file, "convert_all_function_calls iterations: %u\n\n", |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2123 iter_count); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2124 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2125 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2126 struct nesting_copy_body_data |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2127 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2128 copy_body_data cb; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2129 struct nesting_info *root; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2130 }; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2131 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2132 /* A helper subroutine for debug_var_chain type remapping. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2133 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2134 static tree |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2135 nesting_copy_decl (tree decl, copy_body_data *id) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2136 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2137 struct nesting_copy_body_data *nid = (struct nesting_copy_body_data *) id; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2138 void **slot = pointer_map_contains (nid->root->var_map, decl); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2139 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2140 if (slot) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2141 return (tree) *slot; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2142 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2143 if (TREE_CODE (decl) == TYPE_DECL && DECL_ORIGINAL_TYPE (decl)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2144 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2145 tree new_decl = copy_decl_no_change (decl, id); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2146 DECL_ORIGINAL_TYPE (new_decl) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2147 = remap_type (DECL_ORIGINAL_TYPE (decl), id); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2148 return new_decl; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2149 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2150 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2151 if (TREE_CODE (decl) == VAR_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2152 || TREE_CODE (decl) == PARM_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2153 || TREE_CODE (decl) == RESULT_DECL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2154 return decl; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2155 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2156 return copy_decl_no_change (decl, id); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2157 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2158 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2159 /* A helper function for remap_vla_decls. See if *TP contains |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2160 some remapped variables. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2161 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2162 static tree |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2163 contains_remapped_vars (tree *tp, int *walk_subtrees, void *data) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2164 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2165 struct nesting_info *root = (struct nesting_info *) data; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2166 tree t = *tp; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2167 void **slot; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2168 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2169 if (DECL_P (t)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2170 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2171 *walk_subtrees = 0; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2172 slot = pointer_map_contains (root->var_map, t); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2173 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2174 if (slot) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2175 return (tree) *slot; |
| 0 | 2176 } |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2177 return NULL; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2178 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2179 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2180 /* Remap VLA decls in BLOCK and subblocks if remapped variables are |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2181 involved. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2182 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2183 static void |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2184 remap_vla_decls (tree block, struct nesting_info *root) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2185 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2186 tree var, subblock, val, type; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2187 struct nesting_copy_body_data id; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2188 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2189 for (subblock = BLOCK_SUBBLOCKS (block); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2190 subblock; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2191 subblock = BLOCK_CHAIN (subblock)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2192 remap_vla_decls (subblock, root); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2193 |
|
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
|
2194 for (var = BLOCK_VARS (block); var; var = DECL_CHAIN (var)) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2195 if (TREE_CODE (var) == VAR_DECL && DECL_HAS_VALUE_EXPR_P (var)) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2196 { |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2197 val = DECL_VALUE_EXPR (var); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2198 type = TREE_TYPE (var); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2199 |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2200 if (!(TREE_CODE (val) == INDIRECT_REF |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2201 && TREE_CODE (TREE_OPERAND (val, 0)) == VAR_DECL |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2202 && variably_modified_type_p (type, 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
|
2203 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
|
2204 |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2205 if (pointer_map_contains (root->var_map, TREE_OPERAND (val, 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
|
2206 || walk_tree (&type, contains_remapped_vars, root, 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
|
2207 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
|
2208 } |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2209 |
|
55
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update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2210 if (var == NULL_TREE) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2211 return; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2212 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2213 memset (&id, 0, sizeof (id)); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2214 id.cb.copy_decl = nesting_copy_decl; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2215 id.cb.decl_map = pointer_map_create (); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2216 id.root = root; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2217 |
|
67
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2218 for (; var; var = DECL_CHAIN (var)) |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2219 if (TREE_CODE (var) == VAR_DECL && DECL_HAS_VALUE_EXPR_P (var)) |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2220 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2221 struct nesting_info *i; |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2222 tree newt, context; |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
2223 void **slot; |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2224 |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2225 val = DECL_VALUE_EXPR (var); |
|
67
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
2226 type = TREE_TYPE (var); |
|
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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
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parents:
63
diff
changeset
|
2227 |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2228 if (!(TREE_CODE (val) == INDIRECT_REF |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
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|
2229 && TREE_CODE (TREE_OPERAND (val, 0)) == VAR_DECL |
|
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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
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|
2230 && variably_modified_type_p (type, NULL))) |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
2231 continue; |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2232 |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
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|
2233 slot = pointer_map_contains (root->var_map, TREE_OPERAND (val, 0)); |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
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|
2234 if (!slot && !walk_tree (&type, contains_remapped_vars, root, NULL)) |
|
55
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update it from 4.4.3 to 4.5.0
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parents:
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diff
changeset
|
2235 continue; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2236 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2237 context = decl_function_context (var); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2238 for (i = root; i; i = i->outer) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2239 if (i->context == context) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2240 break; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2241 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2242 if (i == NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2243 continue; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2244 |
|
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
|
2245 /* Fully expand value expressions. This avoids having debug variables |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2246 only referenced from them and that can be swept during GC. */ |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2247 if (slot) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2248 { |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2249 tree t = (tree) *slot; |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2250 gcc_assert (DECL_P (t) && DECL_HAS_VALUE_EXPR_P (t)); |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
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|
2251 val = build1 (INDIRECT_REF, TREE_TYPE (val), DECL_VALUE_EXPR (t)); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
2252 } |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
2253 |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2254 id.cb.src_fn = i->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2255 id.cb.dst_fn = i->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2256 id.cb.src_cfun = DECL_STRUCT_FUNCTION (root->context); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2257 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2258 TREE_TYPE (var) = newt = remap_type (type, &id.cb); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2259 while (POINTER_TYPE_P (newt) && !TYPE_NAME (newt)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2260 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2261 newt = TREE_TYPE (newt); |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2262 type = TREE_TYPE (type); |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2263 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2264 if (TYPE_NAME (newt) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2265 && TREE_CODE (TYPE_NAME (newt)) == TYPE_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2266 && DECL_ORIGINAL_TYPE (TYPE_NAME (newt)) |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2267 && newt != type |
|
f6334be47118
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63
diff
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|
2268 && TYPE_NAME (newt) == TYPE_NAME (type)) |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2269 TYPE_NAME (newt) = remap_decl (TYPE_NAME (newt), &id.cb); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2270 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2271 walk_tree (&val, copy_tree_body_r, &id.cb, NULL); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2272 if (val != DECL_VALUE_EXPR (var)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2273 SET_DECL_VALUE_EXPR (var, val); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2274 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2275 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2276 pointer_map_destroy (id.cb.decl_map); |
| 0 | 2277 } |
| 2278 | |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff
changeset
|
2279 /* Fold the MEM_REF *E. */ |
|
f6334be47118
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diff
changeset
|
2280 static bool |
|
f6334be47118
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63
diff
changeset
|
2281 fold_mem_refs (const void *e, void *data ATTRIBUTE_UNUSED) |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2282 { |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2283 tree *ref_p = CONST_CAST2(tree *, const tree *, (const tree *)e); |
|
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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63
diff
changeset
|
2284 *ref_p = fold (*ref_p); |
|
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diff
changeset
|
2285 return true; |
|
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diff
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|
2286 } |
|
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|
2287 |
| 0 | 2288 /* Do "everything else" to clean up or complete state collected by the |
| 2289 various walking passes -- lay out the types and decls, generate code | |
| 2290 to initialize the frame decl, store critical expressions in the | |
| 2291 struct function for rtl to find. */ | |
| 2292 | |
| 2293 static void | |
| 2294 finalize_nesting_tree_1 (struct nesting_info *root) | |
| 2295 { | |
| 2296 gimple_seq stmt_list; | |
| 2297 gimple stmt; | |
| 2298 tree context = root->context; | |
| 2299 struct function *sf; | |
| 2300 | |
| 2301 stmt_list = NULL; | |
| 2302 | |
| 2303 /* If we created a non-local frame type or decl, we need to lay them | |
| 2304 out at this time. */ | |
| 2305 if (root->frame_type) | |
| 2306 { | |
| 2307 /* In some cases the frame type will trigger the -Wpadded warning. | |
| 2308 This is not helpful; suppress it. */ | |
| 2309 int save_warn_padded = warn_padded; | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2310 tree *adjust; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2311 |
| 0 | 2312 warn_padded = 0; |
| 2313 layout_type (root->frame_type); | |
| 2314 warn_padded = save_warn_padded; | |
| 2315 layout_decl (root->frame_decl, 0); | |
|
55
77e2b8dfacca
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parents:
0
diff
changeset
|
2316 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2317 /* Remove root->frame_decl from root->new_local_var_chain, so |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2318 that we can declare it also in the lexical blocks, which |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2319 helps ensure virtual regs that end up appearing in its RTL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2320 expression get substituted in instantiate_virtual_regs(). */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
0
diff
changeset
|
2321 for (adjust = &root->new_local_var_chain; |
|
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update it from 4.4.3 to 4.5.0
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diff
changeset
|
2322 *adjust != root->frame_decl; |
|
67
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diff
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|
2323 adjust = &DECL_CHAIN (*adjust)) |
|
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diff
changeset
|
2324 gcc_assert (DECL_CHAIN (*adjust)); |
|
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diff
changeset
|
2325 *adjust = DECL_CHAIN (*adjust); |
|
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changeset
|
2326 |
|
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diff
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|
2327 DECL_CHAIN (root->frame_decl) = NULL_TREE; |
|
55
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diff
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|
2328 declare_vars (root->frame_decl, |
|
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diff
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|
2329 gimple_seq_first_stmt (gimple_body (context)), true); |
| 0 | 2330 } |
| 2331 | |
|
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diff
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|
2332 /* If any parameters were referenced non-locally, then we need to |
| 0 | 2333 insert a copy. Likewise, if any variables were referenced by |
| 2334 pointer, we need to initialize the address. */ | |
| 2335 if (root->any_parm_remapped) | |
| 2336 { | |
| 2337 tree p; | |
|
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diff
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|
2338 for (p = DECL_ARGUMENTS (context); p ; p = DECL_CHAIN (p)) |
| 0 | 2339 { |
| 2340 tree field, x, y; | |
| 2341 | |
| 2342 field = lookup_field_for_decl (root, p, NO_INSERT); | |
| 2343 if (!field) | |
| 2344 continue; | |
| 2345 | |
| 2346 if (use_pointer_in_frame (p)) | |
| 2347 x = build_addr (p, context); | |
| 2348 else | |
| 2349 x = p; | |
| 2350 | |
| 2351 y = build3 (COMPONENT_REF, TREE_TYPE (field), | |
| 2352 root->frame_decl, field, NULL_TREE); | |
| 2353 stmt = gimple_build_assign (y, x); | |
| 2354 gimple_seq_add_stmt (&stmt_list, stmt); | |
| 2355 /* If the assignment is from a non-register the stmt is | |
| 2356 not valid gimple. Make it so by using a temporary instead. */ | |
| 2357 if (!is_gimple_reg (x) | |
| 2358 && is_gimple_reg_type (TREE_TYPE (x))) | |
| 2359 { | |
| 2360 gimple_stmt_iterator gsi = gsi_last (stmt_list); | |
| 2361 x = init_tmp_var (root, x, &gsi); | |
| 2362 gimple_assign_set_rhs1 (stmt, x); | |
| 2363 } | |
| 2364 } | |
| 2365 } | |
| 2366 | |
| 2367 /* If a chain_field was created, then it needs to be initialized | |
| 2368 from chain_decl. */ | |
| 2369 if (root->chain_field) | |
| 2370 { | |
| 2371 tree x = build3 (COMPONENT_REF, TREE_TYPE (root->chain_field), | |
| 2372 root->frame_decl, root->chain_field, NULL_TREE); | |
| 2373 stmt = gimple_build_assign (x, get_chain_decl (root)); | |
| 2374 gimple_seq_add_stmt (&stmt_list, stmt); | |
| 2375 } | |
| 2376 | |
| 2377 /* If trampolines were created, then we need to initialize them. */ | |
| 2378 if (root->any_tramp_created) | |
| 2379 { | |
| 2380 struct nesting_info *i; | |
| 2381 for (i = root->inner; i ; i = i->next) | |
| 2382 { | |
| 2383 tree arg1, arg2, arg3, x, field; | |
| 2384 | |
| 2385 field = lookup_tramp_for_decl (root, i->context, NO_INSERT); | |
| 2386 if (!field) | |
| 2387 continue; | |
| 2388 | |
|
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diff
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|
2389 gcc_assert (DECL_STATIC_CHAIN (i->context)); |
|
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diff
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|
2390 arg3 = build_addr (root->frame_decl, context); |
| 0 | 2391 |
| 2392 arg2 = build_addr (i->context, context); | |
| 2393 | |
| 2394 x = build3 (COMPONENT_REF, TREE_TYPE (field), | |
| 2395 root->frame_decl, field, NULL_TREE); | |
| 2396 arg1 = build_addr (x, context); | |
| 2397 | |
| 2398 x = implicit_built_in_decls[BUILT_IN_INIT_TRAMPOLINE]; | |
| 2399 stmt = gimple_build_call (x, 3, arg1, arg2, arg3); | |
| 2400 gimple_seq_add_stmt (&stmt_list, stmt); | |
| 2401 } | |
| 2402 } | |
| 2403 | |
| 2404 /* If we created initialization statements, insert them. */ | |
| 2405 if (stmt_list) | |
| 2406 { | |
| 2407 gimple bind; | |
| 2408 annotate_all_with_location (stmt_list, DECL_SOURCE_LOCATION (context)); | |
| 2409 bind = gimple_seq_first_stmt (gimple_body (context)); | |
| 2410 gimple_seq_add_seq (&stmt_list, gimple_bind_body (bind)); | |
| 2411 gimple_bind_set_body (bind, stmt_list); | |
| 2412 } | |
| 2413 | |
| 2414 /* If a chain_decl was created, then it needs to be registered with | |
| 2415 struct function so that it gets initialized from the static chain | |
| 2416 register at the beginning of the function. */ | |
| 2417 sf = DECL_STRUCT_FUNCTION (root->context); | |
| 2418 sf->static_chain_decl = root->chain_decl; | |
| 2419 | |
| 2420 /* Similarly for the non-local goto save area. */ | |
| 2421 if (root->nl_goto_field) | |
| 2422 { | |
| 2423 sf->nonlocal_goto_save_area | |
| 2424 = get_frame_field (root, context, root->nl_goto_field, NULL); | |
| 2425 sf->has_nonlocal_label = 1; | |
| 2426 } | |
| 2427 | |
| 2428 /* Make sure all new local variables get inserted into the | |
| 2429 proper BIND_EXPR. */ | |
| 2430 if (root->new_local_var_chain) | |
| 2431 declare_vars (root->new_local_var_chain, | |
| 2432 gimple_seq_first_stmt (gimple_body (root->context)), | |
| 2433 false); | |
|
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|
2434 |
| 0 | 2435 if (root->debug_var_chain) |
|
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diff
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|
2436 { |
|
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update it from 4.4.3 to 4.5.0
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diff
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|
2437 tree debug_var; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2438 gimple scope; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2439 |
|
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diff
changeset
|
2440 remap_vla_decls (DECL_INITIAL (root->context), root); |
|
77e2b8dfacca
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diff
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|
2441 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2442 for (debug_var = root->debug_var_chain; debug_var; |
|
67
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|
2443 debug_var = DECL_CHAIN (debug_var)) |
|
55
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|
2444 if (variably_modified_type_p (TREE_TYPE (debug_var), NULL)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
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|
2445 break; |
|
77e2b8dfacca
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diff
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|
2446 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2447 /* If there are any debug decls with variable length types, |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2448 remap those types using other debug_var_chain variables. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2449 if (debug_var) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
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|
2450 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2451 struct nesting_copy_body_data id; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2452 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2453 memset (&id, 0, sizeof (id)); |
|
77e2b8dfacca
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diff
changeset
|
2454 id.cb.copy_decl = nesting_copy_decl; |
|
77e2b8dfacca
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diff
changeset
|
2455 id.cb.decl_map = pointer_map_create (); |
|
77e2b8dfacca
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diff
changeset
|
2456 id.root = root; |
|
77e2b8dfacca
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diff
changeset
|
2457 |
|
67
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diff
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|
2458 for (; debug_var; debug_var = DECL_CHAIN (debug_var)) |
|
55
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|
2459 if (variably_modified_type_p (TREE_TYPE (debug_var), NULL)) |
|
77e2b8dfacca
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|
2460 { |
|
77e2b8dfacca
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diff
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|
2461 tree type = TREE_TYPE (debug_var); |
|
77e2b8dfacca
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diff
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|
2462 tree newt, t = type; |
|
77e2b8dfacca
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|
2463 struct nesting_info *i; |
|
77e2b8dfacca
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|
2464 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2465 for (i = root; i; i = i->outer) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
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|
2466 if (variably_modified_type_p (type, i->context)) |
|
77e2b8dfacca
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diff
changeset
|
2467 break; |
|
77e2b8dfacca
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0
diff
changeset
|
2468 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2469 if (i == NULL) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2470 continue; |
|
77e2b8dfacca
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0
diff
changeset
|
2471 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2472 id.cb.src_fn = i->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2473 id.cb.dst_fn = i->context; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2474 id.cb.src_cfun = DECL_STRUCT_FUNCTION (root->context); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2475 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2476 TREE_TYPE (debug_var) = newt = remap_type (type, &id.cb); |
|
77e2b8dfacca
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diff
changeset
|
2477 while (POINTER_TYPE_P (newt) && !TYPE_NAME (newt)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2478 { |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2479 newt = TREE_TYPE (newt); |
|
77e2b8dfacca
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diff
changeset
|
2480 t = TREE_TYPE (t); |
|
77e2b8dfacca
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0
diff
changeset
|
2481 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2482 if (TYPE_NAME (newt) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2483 && TREE_CODE (TYPE_NAME (newt)) == TYPE_DECL |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2484 && DECL_ORIGINAL_TYPE (TYPE_NAME (newt)) |
|
77e2b8dfacca
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diff
changeset
|
2485 && newt != t |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2486 && TYPE_NAME (newt) == TYPE_NAME (t)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2487 TYPE_NAME (newt) = remap_decl (TYPE_NAME (newt), &id.cb); |
|
77e2b8dfacca
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diff
changeset
|
2488 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2489 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2490 pointer_map_destroy (id.cb.decl_map); |
|
77e2b8dfacca
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diff
changeset
|
2491 } |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2492 |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2493 scope = gimple_seq_first_stmt (gimple_body (root->context)); |
|
77e2b8dfacca
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0
diff
changeset
|
2494 if (gimple_bind_block (scope)) |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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0
diff
changeset
|
2495 declare_vars (root->debug_var_chain, scope, true); |
|
77e2b8dfacca
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diff
changeset
|
2496 else |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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diff
changeset
|
2497 BLOCK_VARS (DECL_INITIAL (root->context)) |
|
77e2b8dfacca
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diff
changeset
|
2498 = chainon (BLOCK_VARS (DECL_INITIAL (root->context)), |
|
77e2b8dfacca
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changeset
|
2499 root->debug_var_chain); |
|
77e2b8dfacca
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diff
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|
2500 } |
| 0 | 2501 |
|
67
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changeset
|
2502 /* Fold the rewritten MEM_REF trees. */ |
|
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diff
changeset
|
2503 pointer_set_traverse (root->mem_refs, fold_mem_refs, NULL); |
|
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changeset
|
2504 |
| 0 | 2505 /* Dump the translated tree function. */ |
|
55
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diff
changeset
|
2506 if (dump_file) |
|
77e2b8dfacca
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diff
changeset
|
2507 { |
|
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diff
changeset
|
2508 fputs ("\n\n", dump_file); |
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2509 dump_function_to_file (root->context, dump_file, dump_flags); |
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2510 } |
| 0 | 2511 } |
| 2512 | |
| 2513 static void | |
| 2514 finalize_nesting_tree (struct nesting_info *root) | |
| 2515 { | |
|
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2516 struct nesting_info *n; |
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2517 FOR_EACH_NEST_INFO (n, root) |
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2518 finalize_nesting_tree_1 (n); |
| 0 | 2519 } |
| 2520 | |
| 2521 /* Unnest the nodes and pass them to cgraph. */ | |
| 2522 | |
| 2523 static void | |
| 2524 unnest_nesting_tree_1 (struct nesting_info *root) | |
| 2525 { | |
| 2526 struct cgraph_node *node = cgraph_node (root->context); | |
| 2527 | |
| 2528 /* For nested functions update the cgraph to reflect unnesting. | |
| 2529 We also delay finalizing of these functions up to this point. */ | |
| 2530 if (node->origin) | |
| 2531 { | |
| 2532 cgraph_unnest_node (cgraph_node (root->context)); | |
| 2533 cgraph_finalize_function (root->context, true); | |
| 2534 } | |
| 2535 } | |
| 2536 | |
| 2537 static void | |
| 2538 unnest_nesting_tree (struct nesting_info *root) | |
| 2539 { | |
|
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2540 struct nesting_info *n; |
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2541 FOR_EACH_NEST_INFO (n, root) |
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2542 unnest_nesting_tree_1 (n); |
| 0 | 2543 } |
| 2544 | |
| 2545 /* Free the data structures allocated during this pass. */ | |
| 2546 | |
| 2547 static void | |
| 2548 free_nesting_tree (struct nesting_info *root) | |
| 2549 { | |
|
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2550 struct nesting_info *node, *next; |
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2551 |
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2552 node = iter_nestinfo_start (root); |
| 0 | 2553 do |
| 2554 { | |
|
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2555 next = iter_nestinfo_next (node); |
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2556 pointer_map_destroy (node->var_map); |
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2557 pointer_map_destroy (node->field_map); |
|
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|
2558 pointer_set_destroy (node->mem_refs); |
|
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2559 free (node); |
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2560 node = next; |
| 0 | 2561 } |
|
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2562 while (node); |
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2563 } |
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2564 |
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2565 /* Gimplify a function and all its nested functions. */ |
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2566 static void |
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2567 gimplify_all_functions (struct cgraph_node *root) |
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2568 { |
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2569 struct cgraph_node *iter; |
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2570 if (!gimple_body (root->decl)) |
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2571 gimplify_function_tree (root->decl); |
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2572 for (iter = root->nested; iter; iter = iter->next_nested) |
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2573 gimplify_all_functions (iter); |
| 0 | 2574 } |
| 2575 | |
| 2576 /* Main entry point for this pass. Process FNDECL and all of its nested | |
| 2577 subroutines and turn them into something less tightly bound. */ | |
| 2578 | |
| 2579 void | |
| 2580 lower_nested_functions (tree fndecl) | |
| 2581 { | |
| 2582 struct cgraph_node *cgn; | |
| 2583 struct nesting_info *root; | |
| 2584 | |
| 2585 /* If there are no nested functions, there's nothing to do. */ | |
| 2586 cgn = cgraph_node (fndecl); | |
| 2587 if (!cgn->nested) | |
| 2588 return; | |
| 2589 | |
|
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2590 gimplify_all_functions (cgn); |
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2591 |
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2592 dump_file = dump_begin (TDI_nested, &dump_flags); |
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2593 if (dump_file) |
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2594 fprintf (dump_file, "\n;; Function %s\n\n", |
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2595 lang_hooks.decl_printable_name (fndecl, 2)); |
|
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2596 |
| 0 | 2597 bitmap_obstack_initialize (&nesting_info_bitmap_obstack); |
| 2598 root = create_nesting_tree (cgn); | |
|
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2599 |
| 0 | 2600 walk_all_functions (convert_nonlocal_reference_stmt, |
| 2601 convert_nonlocal_reference_op, | |
| 2602 root); | |
| 2603 walk_all_functions (convert_local_reference_stmt, | |
| 2604 convert_local_reference_op, | |
| 2605 root); | |
| 2606 walk_all_functions (convert_nl_goto_reference, NULL, root); | |
| 2607 walk_all_functions (convert_nl_goto_receiver, NULL, root); | |
|
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2608 |
| 0 | 2609 convert_all_function_calls (root); |
| 2610 finalize_nesting_tree (root); | |
| 2611 unnest_nesting_tree (root); | |
|
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2612 |
| 0 | 2613 free_nesting_tree (root); |
| 2614 bitmap_obstack_release (&nesting_info_bitmap_obstack); | |
|
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2615 |
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2616 if (dump_file) |
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2617 { |
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2618 dump_end (TDI_nested, dump_file); |
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2619 dump_file = NULL; |
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2620 } |
| 0 | 2621 } |
| 2622 | |
| 2623 #include "gt-tree-nested.h" |