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annotate gcc/doc/gimple.texi @ 120:f93fa5091070
fix conv1.c
| author | mir3636 |
|---|---|
| date | Thu, 08 Mar 2018 14:53:42 +0900 |
| parents | 04ced10e8804 |
| children | 84e7813d76e9 |
| rev | line source |
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| 111 | 1 @c Copyright (C) 2008-2017 Free Software Foundation, Inc. |
| 0 | 2 @c Free Software Foundation, Inc. |
| 3 @c This is part of the GCC manual. | |
| 4 @c For copying conditions, see the file gcc.texi. | |
| 5 | |
| 6 @node GIMPLE | |
| 7 @chapter GIMPLE | |
| 8 @cindex GIMPLE | |
| 9 | |
| 10 GIMPLE is a three-address representation derived from GENERIC by | |
| 11 breaking down GENERIC expressions into tuples of no more than 3 | |
| 12 operands (with some exceptions like function calls). GIMPLE was | |
| 13 heavily influenced by the SIMPLE IL used by the McCAT compiler | |
| 14 project at McGill University, though we have made some different | |
| 15 choices. For one thing, SIMPLE doesn't support @code{goto}. | |
| 16 | |
| 17 Temporaries are introduced to hold intermediate values needed to | |
| 18 compute complex expressions. Additionally, all the control | |
| 19 structures used in GENERIC are lowered into conditional jumps, | |
| 20 lexical scopes are removed and exception regions are converted | |
| 21 into an on the side exception region tree. | |
| 22 | |
| 23 The compiler pass which converts GENERIC into GIMPLE is referred to as | |
| 24 the @samp{gimplifier}. The gimplifier works recursively, generating | |
| 25 GIMPLE tuples out of the original GENERIC expressions. | |
| 26 | |
| 27 One of the early implementation strategies used for the GIMPLE | |
| 28 representation was to use the same internal data structures used | |
| 29 by front ends to represent parse trees. This simplified | |
| 30 implementation because we could leverage existing functionality | |
| 31 and interfaces. However, GIMPLE is a much more restrictive | |
| 32 representation than abstract syntax trees (AST), therefore it | |
| 33 does not require the full structural complexity provided by the | |
| 34 main tree data structure. | |
| 35 | |
| 36 The GENERIC representation of a function is stored in the | |
| 37 @code{DECL_SAVED_TREE} field of the associated @code{FUNCTION_DECL} | |
| 38 tree node. It is converted to GIMPLE by a call to | |
| 39 @code{gimplify_function_tree}. | |
| 40 | |
| 41 If a front end wants to include language-specific tree codes in the tree | |
| 42 representation which it provides to the back end, it must provide a | |
| 43 definition of @code{LANG_HOOKS_GIMPLIFY_EXPR} which knows how to | |
| 44 convert the front end trees to GIMPLE@. Usually such a hook will involve | |
| 45 much of the same code for expanding front end trees to RTL@. This function | |
| 46 can return fully lowered GIMPLE, or it can return GENERIC trees and let the | |
| 47 main gimplifier lower them the rest of the way; this is often simpler. | |
| 48 GIMPLE that is not fully lowered is known as ``High GIMPLE'' and | |
| 49 consists of the IL before the pass @code{pass_lower_cf}. High GIMPLE | |
| 50 contains some container statements like lexical scopes | |
| 51 (represented by @code{GIMPLE_BIND}) and nested expressions (e.g., | |
| 52 @code{GIMPLE_TRY}), while ``Low GIMPLE'' exposes all of the | |
| 53 implicit jumps for control and exception expressions directly in | |
| 54 the IL and EH region trees. | |
| 55 | |
| 56 The C and C++ front ends currently convert directly from front end | |
| 57 trees to GIMPLE, and hand that off to the back end rather than first | |
| 58 converting to GENERIC@. Their gimplifier hooks know about all the | |
| 59 @code{_STMT} nodes and how to convert them to GENERIC forms. There | |
| 60 was some work done on a genericization pass which would run first, but | |
| 61 the existence of @code{STMT_EXPR} meant that in order to convert all | |
| 62 of the C statements into GENERIC equivalents would involve walking the | |
| 63 entire tree anyway, so it was simpler to lower all the way. This | |
| 64 might change in the future if someone writes an optimization pass | |
| 65 which would work better with higher-level trees, but currently the | |
| 66 optimizers all expect GIMPLE@. | |
| 67 | |
| 68 You can request to dump a C-like representation of the GIMPLE form | |
| 69 with the flag @option{-fdump-tree-gimple}. | |
| 70 | |
| 71 @menu | |
| 72 * Tuple representation:: | |
| 111 | 73 * Class hierarchy of GIMPLE statements:: |
| 0 | 74 * GIMPLE instruction set:: |
| 75 * GIMPLE Exception Handling:: | |
| 76 * Temporaries:: | |
| 77 * Operands:: | |
| 78 * Manipulating GIMPLE statements:: | |
| 79 * Tuple specific accessors:: | |
| 80 * GIMPLE sequences:: | |
| 81 * Sequence iterators:: | |
| 82 * Adding a new GIMPLE statement code:: | |
| 83 * Statement and operand traversals:: | |
| 84 @end menu | |
| 85 | |
| 86 @node Tuple representation | |
| 87 @section Tuple representation | |
| 88 @cindex tuples | |
| 89 | |
| 90 GIMPLE instructions are tuples of variable size divided in two | |
| 91 groups: a header describing the instruction and its locations, | |
| 92 and a variable length body with all the operands. Tuples are | |
| 93 organized into a hierarchy with 3 main classes of tuples. | |
| 94 | |
| 111 | 95 @subsection @code{gimple} (gsbase) |
| 96 @cindex gimple | |
| 0 | 97 |
| 98 This is the root of the hierarchy, it holds basic information | |
| 99 needed by most GIMPLE statements. There are some fields that | |
| 100 may not be relevant to every GIMPLE statement, but those were | |
| 101 moved into the base structure to take advantage of holes left by | |
| 102 other fields (thus making the structure more compact). The | |
| 103 structure takes 4 words (32 bytes) on 64 bit hosts: | |
| 104 | |
| 105 @multitable {@code{references_memory_p}} {Size (bits)} | |
| 106 @item Field @tab Size (bits) | |
| 107 @item @code{code} @tab 8 | |
| 108 @item @code{subcode} @tab 16 | |
| 109 @item @code{no_warning} @tab 1 | |
| 110 @item @code{visited} @tab 1 | |
| 111 @item @code{nontemporal_move} @tab 1 | |
| 112 @item @code{plf} @tab 2 | |
| 113 @item @code{modified} @tab 1 | |
| 114 @item @code{has_volatile_ops} @tab 1 | |
| 115 @item @code{references_memory_p} @tab 1 | |
| 116 @item @code{uid} @tab 32 | |
| 117 @item @code{location} @tab 32 | |
| 118 @item @code{num_ops} @tab 32 | |
| 119 @item @code{bb} @tab 64 | |
| 120 @item @code{block} @tab 63 | |
| 121 @item Total size @tab 32 bytes | |
| 122 @end multitable | |
| 123 | |
| 124 @itemize @bullet | |
| 125 @item @code{code} | |
| 111 | 126 Main identifier for a GIMPLE instruction. |
| 0 | 127 |
| 128 @item @code{subcode} | |
| 129 Used to distinguish different variants of the same basic | |
| 130 instruction or provide flags applicable to a given code. The | |
| 131 @code{subcode} flags field has different uses depending on the code of | |
| 132 the instruction, but mostly it distinguishes instructions of the | |
| 133 same family. The most prominent use of this field is in | |
| 134 assignments, where subcode indicates the operation done on the | |
| 135 RHS of the assignment. For example, a = b + c is encoded as | |
| 136 @code{GIMPLE_ASSIGN <PLUS_EXPR, a, b, c>}. | |
| 137 | |
| 138 @item @code{no_warning} | |
| 139 Bitflag to indicate whether a warning has already been issued on | |
| 140 this statement. | |
| 141 | |
| 142 @item @code{visited} | |
| 143 General purpose ``visited'' marker. Set and cleared by each pass | |
| 144 when needed. | |
| 145 | |
| 146 @item @code{nontemporal_move} | |
| 147 Bitflag used in assignments that represent non-temporal moves. | |
| 148 Although this bitflag is only used in assignments, it was moved | |
| 149 into the base to take advantage of the bit holes left by the | |
| 150 previous fields. | |
| 151 | |
| 152 @item @code{plf} | |
| 153 Pass Local Flags. This 2-bit mask can be used as general purpose | |
| 154 markers by any pass. Passes are responsible for clearing and | |
| 155 setting these two flags accordingly. | |
| 156 | |
| 157 @item @code{modified} | |
| 158 Bitflag to indicate whether the statement has been modified. | |
| 159 Used mainly by the operand scanner to determine when to re-scan a | |
| 160 statement for operands. | |
| 161 | |
| 162 @item @code{has_volatile_ops} | |
| 163 Bitflag to indicate whether this statement contains operands that | |
| 164 have been marked volatile. | |
| 165 | |
| 166 @item @code{references_memory_p} | |
| 167 Bitflag to indicate whether this statement contains memory | |
| 168 references (i.e., its operands are either global variables, or | |
| 169 pointer dereferences or anything that must reside in memory). | |
| 170 | |
| 171 @item @code{uid} | |
| 172 This is an unsigned integer used by passes that want to assign | |
| 173 IDs to every statement. These IDs must be assigned and used by | |
| 174 each pass. | |
| 175 | |
| 176 @item @code{location} | |
| 177 This is a @code{location_t} identifier to specify source code | |
| 178 location for this statement. It is inherited from the front | |
| 179 end. | |
| 180 | |
| 181 @item @code{num_ops} | |
| 182 Number of operands that this statement has. This specifies the | |
| 183 size of the operand vector embedded in the tuple. Only used in | |
| 184 some tuples, but it is declared in the base tuple to take | |
| 185 advantage of the 32-bit hole left by the previous fields. | |
| 186 | |
| 187 @item @code{bb} | |
| 188 Basic block holding the instruction. | |
| 111 | 189 |
| 0 | 190 @item @code{block} |
| 191 Lexical block holding this statement. Also used for debug | |
| 192 information generation. | |
| 193 @end itemize | |
| 194 | |
| 195 @subsection @code{gimple_statement_with_ops} | |
| 196 @cindex gimple_statement_with_ops | |
| 197 | |
| 198 This tuple is actually split in two: | |
| 199 @code{gimple_statement_with_ops_base} and | |
| 200 @code{gimple_statement_with_ops}. This is needed to accommodate the | |
| 201 way the operand vector is allocated. The operand vector is | |
| 202 defined to be an array of 1 element. So, to allocate a dynamic | |
| 203 number of operands, the memory allocator (@code{gimple_alloc}) simply | |
| 204 allocates enough memory to hold the structure itself plus @code{N | |
| 205 - 1} operands which run ``off the end'' of the structure. For | |
| 206 example, to allocate space for a tuple with 3 operands, | |
| 207 @code{gimple_alloc} reserves @code{sizeof (struct | |
| 208 gimple_statement_with_ops) + 2 * sizeof (tree)} bytes. | |
| 209 | |
| 210 On the other hand, several fields in this tuple need to be shared | |
| 211 with the @code{gimple_statement_with_memory_ops} tuple. So, these | |
| 212 common fields are placed in @code{gimple_statement_with_ops_base} which | |
| 213 is then inherited from the other two tuples. | |
| 214 | |
| 215 | |
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216 @multitable {@code{def_ops}} {48 + 8 * @code{num_ops} bytes} |
| 0 | 217 @item @code{gsbase} @tab 256 |
| 218 @item @code{def_ops} @tab 64 | |
| 219 @item @code{use_ops} @tab 64 | |
| 220 @item @code{op} @tab @code{num_ops} * 64 | |
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221 @item Total size @tab 48 + 8 * @code{num_ops} bytes |
| 0 | 222 @end multitable |
| 223 | |
| 224 @itemize @bullet | |
| 225 @item @code{gsbase} | |
| 111 | 226 Inherited from @code{struct gimple}. |
| 0 | 227 |
| 228 @item @code{def_ops} | |
| 229 Array of pointers into the operand array indicating all the slots that | |
| 230 contain a variable written-to by the statement. This array is | |
| 231 also used for immediate use chaining. Note that it would be | |
| 232 possible to not rely on this array, but the changes required to | |
| 233 implement this are pretty invasive. | |
| 234 | |
| 235 @item @code{use_ops} | |
| 236 Similar to @code{def_ops} but for variables read by the statement. | |
| 237 | |
| 238 @item @code{op} | |
| 239 Array of trees with @code{num_ops} slots. | |
| 240 @end itemize | |
| 241 | |
| 242 @subsection @code{gimple_statement_with_memory_ops} | |
| 243 | |
| 244 This tuple is essentially identical to @code{gimple_statement_with_ops}, | |
| 245 except that it contains 4 additional fields to hold vectors | |
| 246 related memory stores and loads. Similar to the previous case, | |
| 247 the structure is split in two to accommodate for the operand | |
| 248 vector (@code{gimple_statement_with_memory_ops_base} and | |
| 249 @code{gimple_statement_with_memory_ops}). | |
| 250 | |
| 251 | |
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252 @multitable {@code{vdef_ops}} {80 + 8 * @code{num_ops} bytes} |
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253 @item Field @tab Size (bits) |
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254 @item @code{gsbase} @tab 256 |
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255 @item @code{def_ops} @tab 64 |
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256 @item @code{use_ops} @tab 64 |
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257 @item @code{vdef_ops} @tab 64 |
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258 @item @code{vuse_ops} @tab 64 |
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259 @item @code{stores} @tab 64 |
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260 @item @code{loads} @tab 64 |
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261 @item @code{op} @tab @code{num_ops} * 64 |
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262 @item Total size @tab 80 + 8 * @code{num_ops} bytes |
| 0 | 263 @end multitable |
| 264 | |
| 265 @itemize @bullet | |
| 266 @item @code{vdef_ops} | |
| 267 Similar to @code{def_ops} but for @code{VDEF} operators. There is | |
| 268 one entry per memory symbol written by this statement. This is | |
| 269 used to maintain the memory SSA use-def and def-def chains. | |
| 270 | |
| 271 @item @code{vuse_ops} | |
| 272 Similar to @code{use_ops} but for @code{VUSE} operators. There is | |
| 273 one entry per memory symbol loaded by this statement. This is | |
| 274 used to maintain the memory SSA use-def chains. | |
| 275 | |
| 276 @item @code{stores} | |
| 277 Bitset with all the UIDs for the symbols written-to by the | |
| 278 statement. This is different than @code{vdef_ops} in that all the | |
| 279 affected symbols are mentioned in this set. If memory | |
| 280 partitioning is enabled, the @code{vdef_ops} vector will refer to memory | |
| 281 partitions. Furthermore, no SSA information is stored in this | |
| 282 set. | |
| 283 | |
| 284 @item @code{loads} | |
| 285 Similar to @code{stores}, but for memory loads. (Note that there | |
| 286 is some amount of redundancy here, it should be possible to | |
| 287 reduce memory utilization further by removing these sets). | |
| 288 @end itemize | |
| 289 | |
| 290 All the other tuples are defined in terms of these three basic | |
| 111 | 291 ones. Each tuple will add some fields. |
| 292 | |
| 293 | |
| 294 @node Class hierarchy of GIMPLE statements | |
| 295 @section Class hierarchy of GIMPLE statements | |
| 296 @cindex GIMPLE class hierarchy | |
| 297 | |
| 298 The following diagram shows the C++ inheritance hierarchy of statement | |
| 299 kinds, along with their relationships to @code{GSS_} values (layouts) and | |
| 300 @code{GIMPLE_} values (codes): | |
| 0 | 301 |
| 302 @smallexample | |
| 111 | 303 gimple |
| 304 | layout: GSS_BASE | |
| 305 | used for 4 codes: GIMPLE_ERROR_MARK | |
| 306 | GIMPLE_NOP | |
| 307 | GIMPLE_OMP_SECTIONS_SWITCH | |
| 308 | GIMPLE_PREDICT | |
| 309 | | |
| 310 + gimple_statement_with_ops_base | |
| 311 | | (no GSS layout) | |
| 312 | | | |
| 313 | + gimple_statement_with_ops | |
| 314 | | | layout: GSS_WITH_OPS | |
| 315 | | | | |
| 316 | | + gcond | |
| 317 | | | code: GIMPLE_COND | |
| 318 | | | | |
| 319 | | + gdebug | |
| 320 | | | code: GIMPLE_DEBUG | |
| 321 | | | | |
| 322 | | + ggoto | |
| 323 | | | code: GIMPLE_GOTO | |
| 324 | | | | |
| 325 | | + glabel | |
| 326 | | | code: GIMPLE_LABEL | |
| 327 | | | | |
| 328 | | + gswitch | |
| 329 | | code: GIMPLE_SWITCH | |
| 330 | | | |
| 331 | + gimple_statement_with_memory_ops_base | |
| 332 | | layout: GSS_WITH_MEM_OPS_BASE | |
| 333 | | | |
| 334 | + gimple_statement_with_memory_ops | |
| 335 | | | layout: GSS_WITH_MEM_OPS | |
| 336 | | | | |
| 337 | | + gassign | |
| 338 | | | code GIMPLE_ASSIGN | |
| 339 | | | | |
| 340 | | + greturn | |
| 341 | | code GIMPLE_RETURN | |
| 342 | | | |
| 343 | + gcall | |
| 344 | | layout: GSS_CALL, code: GIMPLE_CALL | |
| 345 | | | |
| 346 | + gasm | |
| 347 | | layout: GSS_ASM, code: GIMPLE_ASM | |
| 348 | | | |
| 349 | + gtransaction | |
| 350 | layout: GSS_TRANSACTION, code: GIMPLE_TRANSACTION | |
| 351 | | |
| 352 + gimple_statement_omp | |
| 353 | | layout: GSS_OMP. Used for code GIMPLE_OMP_SECTION | |
| 354 | | | |
| 355 | + gomp_critical | |
| 356 | | layout: GSS_OMP_CRITICAL, code: GIMPLE_OMP_CRITICAL | |
| 357 | | | |
| 358 | + gomp_for | |
| 359 | | layout: GSS_OMP_FOR, code: GIMPLE_OMP_FOR | |
| 360 | | | |
| 361 | + gomp_parallel_layout | |
| 362 | | | layout: GSS_OMP_PARALLEL_LAYOUT | |
| 363 | | | | |
| 364 | | + gimple_statement_omp_taskreg | |
| 365 | | | | | |
| 366 | | | + gomp_parallel | |
| 367 | | | | code: GIMPLE_OMP_PARALLEL | |
| 368 | | | | | |
| 369 | | | + gomp_task | |
| 370 | | | code: GIMPLE_OMP_TASK | |
| 371 | | | | |
| 372 | | + gimple_statement_omp_target | |
| 373 | | code: GIMPLE_OMP_TARGET | |
| 374 | | | |
| 375 | + gomp_sections | |
| 376 | | layout: GSS_OMP_SECTIONS, code: GIMPLE_OMP_SECTIONS | |
| 377 | | | |
| 378 | + gimple_statement_omp_single_layout | |
| 379 | | layout: GSS_OMP_SINGLE_LAYOUT | |
| 380 | | | |
| 381 | + gomp_single | |
| 382 | | code: GIMPLE_OMP_SINGLE | |
| 383 | | | |
| 384 | + gomp_teams | |
| 385 | code: GIMPLE_OMP_TEAMS | |
| 386 | | |
| 387 + gbind | |
| 388 | layout: GSS_BIND, code: GIMPLE_BIND | |
| 389 | | |
| 390 + gcatch | |
| 391 | layout: GSS_CATCH, code: GIMPLE_CATCH | |
| 392 | | |
| 393 + geh_filter | |
| 394 | layout: GSS_EH_FILTER, code: GIMPLE_EH_FILTER | |
| 395 | | |
| 396 + geh_else | |
| 397 | layout: GSS_EH_ELSE, code: GIMPLE_EH_ELSE | |
| 398 | | |
| 399 + geh_mnt | |
| 400 | layout: GSS_EH_MNT, code: GIMPLE_EH_MUST_NOT_THROW | |
| 401 | | |
| 402 + gphi | |
| 403 | layout: GSS_PHI, code: GIMPLE_PHI | |
| 404 | | |
| 405 + gimple_statement_eh_ctrl | |
| 406 | | layout: GSS_EH_CTRL | |
| 407 | | | |
| 408 | + gresx | |
| 409 | | code: GIMPLE_RESX | |
| 410 | | | |
| 411 | + geh_dispatch | |
| 412 | code: GIMPLE_EH_DISPATCH | |
| 413 | | |
| 414 + gtry | |
| 415 | layout: GSS_TRY, code: GIMPLE_TRY | |
| 416 | | |
| 417 + gimple_statement_wce | |
| 418 | layout: GSS_WCE, code: GIMPLE_WITH_CLEANUP_EXPR | |
| 419 | | |
| 420 + gomp_continue | |
| 421 | layout: GSS_OMP_CONTINUE, code: GIMPLE_OMP_CONTINUE | |
| 422 | | |
| 423 + gomp_atomic_load | |
| 424 | layout: GSS_OMP_ATOMIC_LOAD, code: GIMPLE_OMP_ATOMIC_LOAD | |
| 425 | | |
| 426 + gimple_statement_omp_atomic_store_layout | |
| 427 | layout: GSS_OMP_ATOMIC_STORE_LAYOUT, | |
| 428 | code: GIMPLE_OMP_ATOMIC_STORE | |
| 429 | | |
| 430 + gomp_atomic_store | |
| 431 | code: GIMPLE_OMP_ATOMIC_STORE | |
| 432 | | |
| 433 + gomp_return | |
| 434 code: GIMPLE_OMP_RETURN | |
| 0 | 435 @end smallexample |
| 436 | |
| 111 | 437 |
| 0 | 438 @node GIMPLE instruction set |
| 439 @section GIMPLE instruction set | |
| 440 @cindex GIMPLE instruction set | |
| 441 | |
| 442 The following table briefly describes the GIMPLE instruction set. | |
| 443 | |
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444 @multitable {@code{GIMPLE_OMP_SECTIONS_SWITCH}} {High GIMPLE} {Low GIMPLE} |
| 0 | 445 @item Instruction @tab High GIMPLE @tab Low GIMPLE |
| 446 @item @code{GIMPLE_ASM} @tab x @tab x | |
| 447 @item @code{GIMPLE_ASSIGN} @tab x @tab x | |
| 448 @item @code{GIMPLE_BIND} @tab x @tab | |
| 449 @item @code{GIMPLE_CALL} @tab x @tab x | |
| 450 @item @code{GIMPLE_CATCH} @tab x @tab | |
| 451 @item @code{GIMPLE_COND} @tab x @tab x | |
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452 @item @code{GIMPLE_DEBUG} @tab x @tab x |
| 0 | 453 @item @code{GIMPLE_EH_FILTER} @tab x @tab |
| 454 @item @code{GIMPLE_GOTO} @tab x @tab x | |
| 455 @item @code{GIMPLE_LABEL} @tab x @tab x | |
| 456 @item @code{GIMPLE_NOP} @tab x @tab x | |
| 457 @item @code{GIMPLE_OMP_ATOMIC_LOAD} @tab x @tab x | |
| 458 @item @code{GIMPLE_OMP_ATOMIC_STORE} @tab x @tab x | |
| 459 @item @code{GIMPLE_OMP_CONTINUE} @tab x @tab x | |
| 460 @item @code{GIMPLE_OMP_CRITICAL} @tab x @tab x | |
| 461 @item @code{GIMPLE_OMP_FOR} @tab x @tab x | |
| 462 @item @code{GIMPLE_OMP_MASTER} @tab x @tab x | |
| 463 @item @code{GIMPLE_OMP_ORDERED} @tab x @tab x | |
| 464 @item @code{GIMPLE_OMP_PARALLEL} @tab x @tab x | |
| 465 @item @code{GIMPLE_OMP_RETURN} @tab x @tab x | |
| 466 @item @code{GIMPLE_OMP_SECTION} @tab x @tab x | |
| 467 @item @code{GIMPLE_OMP_SECTIONS} @tab x @tab x | |
| 468 @item @code{GIMPLE_OMP_SECTIONS_SWITCH} @tab x @tab x | |
| 469 @item @code{GIMPLE_OMP_SINGLE} @tab x @tab x | |
| 470 @item @code{GIMPLE_PHI} @tab @tab x | |
| 471 @item @code{GIMPLE_RESX} @tab @tab x | |
| 472 @item @code{GIMPLE_RETURN} @tab x @tab x | |
| 473 @item @code{GIMPLE_SWITCH} @tab x @tab x | |
| 474 @item @code{GIMPLE_TRY} @tab x @tab | |
| 475 @end multitable | |
| 476 | |
| 477 @node GIMPLE Exception Handling | |
| 478 @section Exception Handling | |
| 479 @cindex GIMPLE Exception Handling | |
| 480 | |
| 481 Other exception handling constructs are represented using | |
| 482 @code{GIMPLE_TRY_CATCH}. @code{GIMPLE_TRY_CATCH} has two operands. The | |
| 483 first operand is a sequence of statements to execute. If executing | |
| 484 these statements does not throw an exception, then the second operand | |
| 485 is ignored. Otherwise, if an exception is thrown, then the second | |
| 486 operand of the @code{GIMPLE_TRY_CATCH} is checked. The second | |
| 487 operand may have the following forms: | |
| 488 | |
| 489 @enumerate | |
| 490 | |
| 491 @item A sequence of statements to execute. When an exception occurs, | |
| 492 these statements are executed, and then the exception is rethrown. | |
| 493 | |
| 494 @item A sequence of @code{GIMPLE_CATCH} statements. Each | |
| 495 @code{GIMPLE_CATCH} has a list of applicable exception types and | |
| 496 handler code. If the thrown exception matches one of the caught | |
| 497 types, the associated handler code is executed. If the handler | |
| 498 code falls off the bottom, execution continues after the original | |
| 499 @code{GIMPLE_TRY_CATCH}. | |
| 500 | |
|
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501 @item A @code{GIMPLE_EH_FILTER} statement. This has a list of |
| 0 | 502 permitted exception types, and code to handle a match failure. If the |
| 503 thrown exception does not match one of the allowed types, the | |
| 504 associated match failure code is executed. If the thrown exception | |
| 505 does match, it continues unwinding the stack looking for the next | |
| 506 handler. | |
| 507 | |
| 508 @end enumerate | |
| 509 | |
| 510 Currently throwing an exception is not directly represented in | |
| 511 GIMPLE, since it is implemented by calling a function. At some | |
| 512 point in the future we will want to add some way to express that | |
| 513 the call will throw an exception of a known type. | |
| 514 | |
| 515 Just before running the optimizers, the compiler lowers the | |
| 516 high-level EH constructs above into a set of @samp{goto}s, magic | |
| 517 labels, and EH regions. Continuing to unwind at the end of a | |
| 518 cleanup is represented with a @code{GIMPLE_RESX}. | |
| 519 | |
| 520 | |
| 521 @node Temporaries | |
| 522 @section Temporaries | |
| 523 @cindex Temporaries | |
| 524 | |
| 525 When gimplification encounters a subexpression that is too | |
| 526 complex, it creates a new temporary variable to hold the value of | |
| 527 the subexpression, and adds a new statement to initialize it | |
| 528 before the current statement. These special temporaries are known | |
| 529 as @samp{expression temporaries}, and are allocated using | |
| 530 @code{get_formal_tmp_var}. The compiler tries to always evaluate | |
| 531 identical expressions into the same temporary, to simplify | |
| 532 elimination of redundant calculations. | |
| 533 | |
| 534 We can only use expression temporaries when we know that it will | |
| 535 not be reevaluated before its value is used, and that it will not | |
| 536 be otherwise modified@footnote{These restrictions are derived | |
| 537 from those in Morgan 4.8.}. Other temporaries can be allocated | |
| 538 using @code{get_initialized_tmp_var} or @code{create_tmp_var}. | |
| 539 | |
| 540 Currently, an expression like @code{a = b + 5} is not reduced any | |
| 541 further. We tried converting it to something like | |
| 542 @smallexample | |
|
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543 T1 = b + 5; |
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544 a = T1; |
| 0 | 545 @end smallexample |
| 546 but this bloated the representation for minimal benefit. However, a | |
| 547 variable which must live in memory cannot appear in an expression; its | |
| 548 value is explicitly loaded into a temporary first. Similarly, storing | |
| 549 the value of an expression to a memory variable goes through a | |
| 550 temporary. | |
| 551 | |
| 552 @node Operands | |
| 553 @section Operands | |
| 554 @cindex Operands | |
| 555 | |
| 556 In general, expressions in GIMPLE consist of an operation and the | |
| 557 appropriate number of simple operands; these operands must either be a | |
| 558 GIMPLE rvalue (@code{is_gimple_val}), i.e.@: a constant or a register | |
| 559 variable. More complex operands are factored out into temporaries, so | |
| 560 that | |
| 561 @smallexample | |
|
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562 a = b + c + d |
| 0 | 563 @end smallexample |
| 564 becomes | |
| 565 @smallexample | |
|
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566 T1 = b + c; |
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567 a = T1 + d; |
| 0 | 568 @end smallexample |
| 569 | |
| 570 The same rule holds for arguments to a @code{GIMPLE_CALL}. | |
| 571 | |
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572 The target of an assignment is usually a variable, but can also be a |
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573 @code{MEM_REF} or a compound lvalue as described below. |
| 0 | 574 |
| 575 @menu | |
| 576 * Compound Expressions:: | |
| 577 * Compound Lvalues:: | |
| 578 * Conditional Expressions:: | |
| 579 * Logical Operators:: | |
| 580 @end menu | |
| 581 | |
| 582 @node Compound Expressions | |
| 583 @subsection Compound Expressions | |
| 584 @cindex Compound Expressions | |
| 585 | |
| 586 The left-hand side of a C comma expression is simply moved into a separate | |
| 587 statement. | |
| 588 | |
| 589 @node Compound Lvalues | |
| 590 @subsection Compound Lvalues | |
| 591 @cindex Compound Lvalues | |
| 592 | |
| 593 Currently compound lvalues involving array and structure field references | |
| 594 are not broken down; an expression like @code{a.b[2] = 42} is not reduced | |
| 595 any further (though complex array subscripts are). This restriction is a | |
| 596 workaround for limitations in later optimizers; if we were to convert this | |
| 597 to | |
| 598 | |
| 599 @smallexample | |
|
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600 T1 = &a.b; |
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601 T1[2] = 42; |
| 0 | 602 @end smallexample |
| 603 | |
| 604 alias analysis would not remember that the reference to @code{T1[2]} came | |
| 605 by way of @code{a.b}, so it would think that the assignment could alias | |
| 606 another member of @code{a}; this broke @code{struct-alias-1.c}. Future | |
| 607 optimizer improvements may make this limitation unnecessary. | |
| 608 | |
| 609 @node Conditional Expressions | |
| 610 @subsection Conditional Expressions | |
| 611 @cindex Conditional Expressions | |
| 612 | |
| 613 A C @code{?:} expression is converted into an @code{if} statement with | |
| 614 each branch assigning to the same temporary. So, | |
| 615 | |
| 616 @smallexample | |
|
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617 a = b ? c : d; |
| 0 | 618 @end smallexample |
| 619 becomes | |
| 620 @smallexample | |
|
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621 if (b == 1) |
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622 T1 = c; |
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623 else |
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624 T1 = d; |
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625 a = T1; |
| 0 | 626 @end smallexample |
| 627 | |
| 628 The GIMPLE level if-conversion pass re-introduces @code{?:} | |
| 629 expression, if appropriate. It is used to vectorize loops with | |
| 630 conditions using vector conditional operations. | |
| 631 | |
| 632 Note that in GIMPLE, @code{if} statements are represented using | |
| 633 @code{GIMPLE_COND}, as described below. | |
| 634 | |
| 635 @node Logical Operators | |
| 636 @subsection Logical Operators | |
| 637 @cindex Logical Operators | |
| 638 | |
| 639 Except when they appear in the condition operand of a | |
| 640 @code{GIMPLE_COND}, logical `and' and `or' operators are simplified | |
| 641 as follows: @code{a = b && c} becomes | |
| 642 | |
| 643 @smallexample | |
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644 T1 = (bool)b; |
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645 if (T1 == true) |
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646 T1 = (bool)c; |
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647 a = T1; |
| 0 | 648 @end smallexample |
| 649 | |
| 650 Note that @code{T1} in this example cannot be an expression temporary, | |
| 651 because it has two different assignments. | |
| 652 | |
| 653 @subsection Manipulating operands | |
| 654 | |
| 655 All gimple operands are of type @code{tree}. But only certain | |
| 656 types of trees are allowed to be used as operand tuples. Basic | |
| 657 validation is controlled by the function | |
| 658 @code{get_gimple_rhs_class}, which given a tree code, returns an | |
| 659 @code{enum} with the following values of type @code{enum | |
| 660 gimple_rhs_class} | |
| 661 | |
| 662 @itemize @bullet | |
| 663 @item @code{GIMPLE_INVALID_RHS} | |
| 664 The tree cannot be used as a GIMPLE operand. | |
| 665 | |
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666 @item @code{GIMPLE_TERNARY_RHS} |
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667 The tree is a valid GIMPLE ternary operation. |
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668 |
| 0 | 669 @item @code{GIMPLE_BINARY_RHS} |
| 670 The tree is a valid GIMPLE binary operation. | |
| 671 | |
| 672 @item @code{GIMPLE_UNARY_RHS} | |
| 673 The tree is a valid GIMPLE unary operation. | |
| 674 | |
| 675 @item @code{GIMPLE_SINGLE_RHS} | |
| 676 The tree is a single object, that cannot be split into simpler | |
| 677 operands (for instance, @code{SSA_NAME}, @code{VAR_DECL}, @code{COMPONENT_REF}, etc). | |
| 678 | |
| 679 This operand class also acts as an escape hatch for tree nodes | |
| 680 that may be flattened out into the operand vector, but would need | |
| 681 more than two slots on the RHS. For instance, a @code{COND_EXPR} | |
| 682 expression of the form @code{(a op b) ? x : y} could be flattened | |
| 683 out on the operand vector using 4 slots, but it would also | |
| 684 require additional processing to distinguish @code{c = a op b} | |
| 685 from @code{c = a op b ? x : y}. Something similar occurs with | |
| 686 @code{ASSERT_EXPR}. In time, these special case tree | |
| 687 expressions should be flattened into the operand vector. | |
| 688 @end itemize | |
| 689 | |
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690 For tree nodes in the categories @code{GIMPLE_TERNARY_RHS}, |
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691 @code{GIMPLE_BINARY_RHS} and @code{GIMPLE_UNARY_RHS}, they cannot be |
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692 stored inside tuples directly. They first need to be flattened and |
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693 separated into individual components. For instance, given the GENERIC |
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694 expression |
| 0 | 695 |
| 696 @smallexample | |
| 697 a = b + c | |
| 698 @end smallexample | |
| 699 | |
| 700 its tree representation is: | |
| 701 | |
| 702 @smallexample | |
| 703 MODIFY_EXPR <VAR_DECL <a>, PLUS_EXPR <VAR_DECL <b>, VAR_DECL <c>>> | |
| 704 @end smallexample | |
| 705 | |
| 706 In this case, the GIMPLE form for this statement is logically | |
| 707 identical to its GENERIC form but in GIMPLE, the @code{PLUS_EXPR} | |
| 708 on the RHS of the assignment is not represented as a tree, | |
| 709 instead the two operands are taken out of the @code{PLUS_EXPR} sub-tree | |
| 710 and flattened into the GIMPLE tuple as follows: | |
| 711 | |
| 712 @smallexample | |
| 713 GIMPLE_ASSIGN <PLUS_EXPR, VAR_DECL <a>, VAR_DECL <b>, VAR_DECL <c>> | |
| 714 @end smallexample | |
| 715 | |
| 716 @subsection Operand vector allocation | |
| 717 | |
| 718 The operand vector is stored at the bottom of the three tuple | |
| 719 structures that accept operands. This means, that depending on | |
| 720 the code of a given statement, its operand vector will be at | |
| 721 different offsets from the base of the structure. To access | |
| 722 tuple operands use the following accessors | |
| 723 | |
| 724 @deftypefn {GIMPLE function} unsigned gimple_num_ops (gimple g) | |
| 725 Returns the number of operands in statement G. | |
| 726 @end deftypefn | |
| 727 | |
| 728 @deftypefn {GIMPLE function} tree gimple_op (gimple g, unsigned i) | |
| 729 Returns operand @code{I} from statement @code{G}. | |
| 730 @end deftypefn | |
| 731 | |
|
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732 @deftypefn {GIMPLE function} {tree *} gimple_ops (gimple g) |
| 0 | 733 Returns a pointer into the operand vector for statement @code{G}. This |
| 734 is computed using an internal table called @code{gimple_ops_offset_}[]. | |
| 735 This table is indexed by the gimple code of @code{G}. | |
| 736 | |
| 737 When the compiler is built, this table is filled-in using the | |
| 738 sizes of the structures used by each statement code defined in | |
| 739 gimple.def. Since the operand vector is at the bottom of the | |
| 740 structure, for a gimple code @code{C} the offset is computed as sizeof | |
| 741 (struct-of @code{C}) - sizeof (tree). | |
| 742 | |
| 743 This mechanism adds one memory indirection to every access when | |
| 744 using @code{gimple_op}(), if this becomes a bottleneck, a pass can | |
| 745 choose to memoize the result from @code{gimple_ops}() and use that to | |
| 746 access the operands. | |
| 747 @end deftypefn | |
| 748 | |
| 749 @subsection Operand validation | |
| 750 | |
| 751 When adding a new operand to a gimple statement, the operand will | |
| 752 be validated according to what each tuple accepts in its operand | |
| 753 vector. These predicates are called by the | |
|
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754 @code{gimple_@var{name}_set_...()}. Each tuple will use one of the |
| 0 | 755 following predicates (Note, this list is not exhaustive): |
| 756 | |
|
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757 @deftypefn {GIMPLE function} bool is_gimple_val (tree t) |
| 0 | 758 Returns true if t is a "GIMPLE value", which are all the |
| 759 non-addressable stack variables (variables for which | |
| 760 @code{is_gimple_reg} returns true) and constants (expressions for which | |
| 761 @code{is_gimple_min_invariant} returns true). | |
| 762 @end deftypefn | |
| 763 | |
|
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764 @deftypefn {GIMPLE function} bool is_gimple_addressable (tree t) |
| 0 | 765 Returns true if t is a symbol or memory reference whose address |
| 766 can be taken. | |
| 767 @end deftypefn | |
| 768 | |
|
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769 @deftypefn {GIMPLE function} bool is_gimple_asm_val (tree t) |
| 0 | 770 Similar to @code{is_gimple_val} but it also accepts hard registers. |
| 771 @end deftypefn | |
| 772 | |
|
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773 @deftypefn {GIMPLE function} bool is_gimple_call_addr (tree t) |
| 0 | 774 Return true if t is a valid expression to use as the function |
| 775 called by a @code{GIMPLE_CALL}. | |
| 776 @end deftypefn | |
| 777 | |
|
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778 @deftypefn {GIMPLE function} bool is_gimple_mem_ref_addr (tree t) |
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779 Return true if t is a valid expression to use as first operand |
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780 of a @code{MEM_REF} expression. |
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781 @end deftypefn |
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782 |
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783 @deftypefn {GIMPLE function} bool is_gimple_constant (tree t) |
| 0 | 784 Return true if t is a valid gimple constant. |
| 785 @end deftypefn | |
| 786 | |
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787 @deftypefn {GIMPLE function} bool is_gimple_min_invariant (tree t) |
| 0 | 788 Return true if t is a valid minimal invariant. This is different |
| 789 from constants, in that the specific value of t may not be known | |
| 790 at compile time, but it is known that it doesn't change (e.g., | |
| 791 the address of a function local variable). | |
| 792 @end deftypefn | |
| 793 | |
|
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794 @deftypefn {GIMPLE function} bool is_gimple_ip_invariant (tree t) |
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795 Return true if t is an interprocedural invariant. This means that t |
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796 is a valid invariant in all functions (e.g. it can be an address of a |
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797 global variable but not of a local one). |
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798 @end deftypefn |
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799 |
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800 @deftypefn {GIMPLE function} bool is_gimple_ip_invariant_address (tree t) |
| 0 | 801 Return true if t is an @code{ADDR_EXPR} that does not change once the |
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802 program is running (and which is valid in all functions). |
| 0 | 803 @end deftypefn |
| 804 | |
| 805 | |
| 806 @subsection Statement validation | |
| 807 | |
|
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808 @deftypefn {GIMPLE function} bool is_gimple_assign (gimple g) |
| 0 | 809 Return true if the code of g is @code{GIMPLE_ASSIGN}. |
| 810 @end deftypefn | |
| 111 | 811 |
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812 @deftypefn {GIMPLE function} bool is_gimple_call (gimple g) |
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813 Return true if the code of g is @code{GIMPLE_CALL}. |
| 0 | 814 @end deftypefn |
| 111 | 815 |
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816 @deftypefn {GIMPLE function} bool is_gimple_debug (gimple g) |
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817 Return true if the code of g is @code{GIMPLE_DEBUG}. |
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818 @end deftypefn |
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819 |
| 111 | 820 @deftypefn {GIMPLE function} bool gimple_assign_cast_p (const_gimple g) |
| 0 | 821 Return true if g is a @code{GIMPLE_ASSIGN} that performs a type cast |
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822 operation. |
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823 @end deftypefn |
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824 |
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825 @deftypefn {GIMPLE function} bool gimple_debug_bind_p (gimple g) |
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826 Return true if g is a @code{GIMPLE_DEBUG} that binds the value of an |
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827 expression to a variable. |
| 0 | 828 @end deftypefn |
| 829 | |
| 111 | 830 @deftypefn {GIMPLE function} bool is_gimple_omp (gimple g) |
| 831 Return true if g is any of the OpenMP codes. | |
| 832 @end deftypefn | |
| 833 | |
| 0 | 834 @node Manipulating GIMPLE statements |
| 835 @section Manipulating GIMPLE statements | |
| 836 @cindex Manipulating GIMPLE statements | |
| 837 | |
| 838 This section documents all the functions available to handle each | |
| 839 of the GIMPLE instructions. | |
| 840 | |
| 111 | 841 @subsection Common accessors |
| 0 | 842 The following are common accessors for gimple statements. |
| 843 | |
|
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844 @deftypefn {GIMPLE function} {enum gimple_code} gimple_code (gimple g) |
| 0 | 845 Return the code for statement @code{G}. |
| 846 @end deftypefn | |
| 111 | 847 |
| 0 | 848 @deftypefn {GIMPLE function} basic_block gimple_bb (gimple g) |
| 849 Return the basic block to which statement @code{G} belongs to. | |
| 850 @end deftypefn | |
| 111 | 851 |
| 0 | 852 @deftypefn {GIMPLE function} tree gimple_block (gimple g) |
| 853 Return the lexical scope block holding statement @code{G}. | |
| 854 @end deftypefn | |
| 111 | 855 |
| 0 | 856 @deftypefn {GIMPLE function} tree gimple_expr_type (gimple stmt) |
| 857 Return the type of the main expression computed by @code{STMT}. Return | |
| 858 @code{void_type_node} if @code{STMT} computes nothing. This will only return | |
| 859 something meaningful for @code{GIMPLE_ASSIGN}, @code{GIMPLE_COND} and | |
| 860 @code{GIMPLE_CALL}. For all other tuple codes, it will return | |
| 861 @code{void_type_node}. | |
| 862 @end deftypefn | |
| 863 | |
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864 @deftypefn {GIMPLE function} {enum tree_code} gimple_expr_code (gimple stmt) |
| 0 | 865 Return the tree code for the expression computed by @code{STMT}. This |
| 866 is only meaningful for @code{GIMPLE_CALL}, @code{GIMPLE_ASSIGN} and | |
| 867 @code{GIMPLE_COND}. If @code{STMT} is @code{GIMPLE_CALL}, it will return @code{CALL_EXPR}. | |
| 868 For @code{GIMPLE_COND}, it returns the code of the comparison predicate. | |
| 869 For @code{GIMPLE_ASSIGN} it returns the code of the operation performed | |
| 870 by the @code{RHS} of the assignment. | |
| 871 @end deftypefn | |
| 872 | |
| 873 @deftypefn {GIMPLE function} void gimple_set_block (gimple g, tree block) | |
| 874 Set the lexical scope block of @code{G} to @code{BLOCK}. | |
| 875 @end deftypefn | |
| 111 | 876 |
| 0 | 877 @deftypefn {GIMPLE function} location_t gimple_locus (gimple g) |
| 878 Return locus information for statement @code{G}. | |
| 879 @end deftypefn | |
| 111 | 880 |
| 0 | 881 @deftypefn {GIMPLE function} void gimple_set_locus (gimple g, location_t locus) |
| 882 Set locus information for statement @code{G}. | |
| 883 @end deftypefn | |
| 111 | 884 |
| 0 | 885 @deftypefn {GIMPLE function} bool gimple_locus_empty_p (gimple g) |
| 886 Return true if @code{G} does not have locus information. | |
| 887 @end deftypefn | |
| 111 | 888 |
| 0 | 889 @deftypefn {GIMPLE function} bool gimple_no_warning_p (gimple stmt) |
| 890 Return true if no warnings should be emitted for statement @code{STMT}. | |
| 891 @end deftypefn | |
| 111 | 892 |
| 0 | 893 @deftypefn {GIMPLE function} void gimple_set_visited (gimple stmt, bool visited_p) |
| 894 Set the visited status on statement @code{STMT} to @code{VISITED_P}. | |
| 895 @end deftypefn | |
| 111 | 896 |
| 0 | 897 @deftypefn {GIMPLE function} bool gimple_visited_p (gimple stmt) |
| 898 Return the visited status on statement @code{STMT}. | |
| 899 @end deftypefn | |
| 111 | 900 |
| 0 | 901 @deftypefn {GIMPLE function} void gimple_set_plf (gimple stmt, enum plf_mask plf, bool val_p) |
| 902 Set pass local flag @code{PLF} on statement @code{STMT} to @code{VAL_P}. | |
| 903 @end deftypefn | |
| 111 | 904 |
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905 @deftypefn {GIMPLE function} {unsigned int} gimple_plf (gimple stmt, enum plf_mask plf) |
| 0 | 906 Return the value of pass local flag @code{PLF} on statement @code{STMT}. |
| 907 @end deftypefn | |
| 111 | 908 |
| 0 | 909 @deftypefn {GIMPLE function} bool gimple_has_ops (gimple g) |
| 910 Return true if statement @code{G} has register or memory operands. | |
| 911 @end deftypefn | |
| 111 | 912 |
| 0 | 913 @deftypefn {GIMPLE function} bool gimple_has_mem_ops (gimple g) |
| 914 Return true if statement @code{G} has memory operands. | |
| 915 @end deftypefn | |
| 111 | 916 |
| 0 | 917 @deftypefn {GIMPLE function} unsigned gimple_num_ops (gimple g) |
| 918 Return the number of operands for statement @code{G}. | |
| 919 @end deftypefn | |
| 111 | 920 |
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921 @deftypefn {GIMPLE function} {tree *} gimple_ops (gimple g) |
| 0 | 922 Return the array of operands for statement @code{G}. |
| 923 @end deftypefn | |
| 111 | 924 |
| 0 | 925 @deftypefn {GIMPLE function} tree gimple_op (gimple g, unsigned i) |
| 926 Return operand @code{I} for statement @code{G}. | |
| 927 @end deftypefn | |
| 111 | 928 |
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929 @deftypefn {GIMPLE function} {tree *} gimple_op_ptr (gimple g, unsigned i) |
| 0 | 930 Return a pointer to operand @code{I} for statement @code{G}. |
| 931 @end deftypefn | |
| 111 | 932 |
| 0 | 933 @deftypefn {GIMPLE function} void gimple_set_op (gimple g, unsigned i, tree op) |
| 934 Set operand @code{I} of statement @code{G} to @code{OP}. | |
| 935 @end deftypefn | |
| 111 | 936 |
| 0 | 937 @deftypefn {GIMPLE function} bitmap gimple_addresses_taken (gimple stmt) |
| 938 Return the set of symbols that have had their address taken by | |
| 939 @code{STMT}. | |
| 940 @end deftypefn | |
| 111 | 941 |
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942 @deftypefn {GIMPLE function} {struct def_optype_d *} gimple_def_ops (gimple g) |
| 0 | 943 Return the set of @code{DEF} operands for statement @code{G}. |
| 944 @end deftypefn | |
| 111 | 945 |
| 0 | 946 @deftypefn {GIMPLE function} void gimple_set_def_ops (gimple g, struct def_optype_d *def) |
| 947 Set @code{DEF} to be the set of @code{DEF} operands for statement @code{G}. | |
| 948 @end deftypefn | |
| 111 | 949 |
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950 @deftypefn {GIMPLE function} {struct use_optype_d *} gimple_use_ops (gimple g) |
| 0 | 951 Return the set of @code{USE} operands for statement @code{G}. |
| 952 @end deftypefn | |
| 111 | 953 |
| 0 | 954 @deftypefn {GIMPLE function} void gimple_set_use_ops (gimple g, struct use_optype_d *use) |
| 955 Set @code{USE} to be the set of @code{USE} operands for statement @code{G}. | |
| 956 @end deftypefn | |
| 111 | 957 |
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958 @deftypefn {GIMPLE function} {struct voptype_d *} gimple_vuse_ops (gimple g) |
| 0 | 959 Return the set of @code{VUSE} operands for statement @code{G}. |
| 960 @end deftypefn | |
| 111 | 961 |
| 0 | 962 @deftypefn {GIMPLE function} void gimple_set_vuse_ops (gimple g, struct voptype_d *ops) |
| 963 Set @code{OPS} to be the set of @code{VUSE} operands for statement @code{G}. | |
| 964 @end deftypefn | |
| 111 | 965 |
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966 @deftypefn {GIMPLE function} {struct voptype_d *} gimple_vdef_ops (gimple g) |
| 0 | 967 Return the set of @code{VDEF} operands for statement @code{G}. |
| 968 @end deftypefn | |
| 111 | 969 |
| 0 | 970 @deftypefn {GIMPLE function} void gimple_set_vdef_ops (gimple g, struct voptype_d *ops) |
| 971 Set @code{OPS} to be the set of @code{VDEF} operands for statement @code{G}. | |
| 972 @end deftypefn | |
| 111 | 973 |
| 0 | 974 @deftypefn {GIMPLE function} bitmap gimple_loaded_syms (gimple g) |
| 975 Return the set of symbols loaded by statement @code{G}. Each element of | |
| 976 the set is the @code{DECL_UID} of the corresponding symbol. | |
| 977 @end deftypefn | |
| 111 | 978 |
| 0 | 979 @deftypefn {GIMPLE function} bitmap gimple_stored_syms (gimple g) |
| 980 Return the set of symbols stored by statement @code{G}. Each element of | |
| 981 the set is the @code{DECL_UID} of the corresponding symbol. | |
| 982 @end deftypefn | |
| 111 | 983 |
| 0 | 984 @deftypefn {GIMPLE function} bool gimple_modified_p (gimple g) |
| 985 Return true if statement @code{G} has operands and the modified field | |
| 986 has been set. | |
| 987 @end deftypefn | |
| 111 | 988 |
| 0 | 989 @deftypefn {GIMPLE function} bool gimple_has_volatile_ops (gimple stmt) |
| 990 Return true if statement @code{STMT} contains volatile operands. | |
| 991 @end deftypefn | |
| 111 | 992 |
| 0 | 993 @deftypefn {GIMPLE function} void gimple_set_has_volatile_ops (gimple stmt, bool volatilep) |
| 994 Return true if statement @code{STMT} contains volatile operands. | |
| 995 @end deftypefn | |
| 111 | 996 |
| 0 | 997 @deftypefn {GIMPLE function} void update_stmt (gimple s) |
| 998 Mark statement @code{S} as modified, and update it. | |
| 999 @end deftypefn | |
| 111 | 1000 |
| 0 | 1001 @deftypefn {GIMPLE function} void update_stmt_if_modified (gimple s) |
| 1002 Update statement @code{S} if it has been marked modified. | |
| 1003 @end deftypefn | |
| 111 | 1004 |
| 0 | 1005 @deftypefn {GIMPLE function} gimple gimple_copy (gimple stmt) |
| 1006 Return a deep copy of statement @code{STMT}. | |
| 1007 @end deftypefn | |
| 1008 | |
| 1009 @node Tuple specific accessors | |
| 1010 @section Tuple specific accessors | |
| 1011 @cindex Tuple specific accessors | |
| 1012 | |
| 1013 @menu | |
| 1014 * @code{GIMPLE_ASM}:: | |
| 1015 * @code{GIMPLE_ASSIGN}:: | |
| 1016 * @code{GIMPLE_BIND}:: | |
| 1017 * @code{GIMPLE_CALL}:: | |
| 1018 * @code{GIMPLE_CATCH}:: | |
| 1019 * @code{GIMPLE_COND}:: | |
|
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1020 * @code{GIMPLE_DEBUG}:: |
| 0 | 1021 * @code{GIMPLE_EH_FILTER}:: |
| 1022 * @code{GIMPLE_LABEL}:: | |
| 111 | 1023 * @code{GIMPLE_GOTO}:: |
| 0 | 1024 * @code{GIMPLE_NOP}:: |
| 1025 * @code{GIMPLE_OMP_ATOMIC_LOAD}:: | |
| 1026 * @code{GIMPLE_OMP_ATOMIC_STORE}:: | |
| 1027 * @code{GIMPLE_OMP_CONTINUE}:: | |
| 1028 * @code{GIMPLE_OMP_CRITICAL}:: | |
| 1029 * @code{GIMPLE_OMP_FOR}:: | |
| 1030 * @code{GIMPLE_OMP_MASTER}:: | |
| 1031 * @code{GIMPLE_OMP_ORDERED}:: | |
| 1032 * @code{GIMPLE_OMP_PARALLEL}:: | |
| 1033 * @code{GIMPLE_OMP_RETURN}:: | |
| 1034 * @code{GIMPLE_OMP_SECTION}:: | |
| 1035 * @code{GIMPLE_OMP_SECTIONS}:: | |
| 1036 * @code{GIMPLE_OMP_SINGLE}:: | |
| 1037 * @code{GIMPLE_PHI}:: | |
| 1038 * @code{GIMPLE_RESX}:: | |
| 1039 * @code{GIMPLE_RETURN}:: | |
| 1040 * @code{GIMPLE_SWITCH}:: | |
| 1041 * @code{GIMPLE_TRY}:: | |
| 1042 * @code{GIMPLE_WITH_CLEANUP_EXPR}:: | |
| 1043 @end menu | |
| 1044 | |
| 1045 | |
| 1046 @node @code{GIMPLE_ASM} | |
| 1047 @subsection @code{GIMPLE_ASM} | |
| 1048 @cindex @code{GIMPLE_ASM} | |
| 1049 | |
| 111 | 1050 @deftypefn {GIMPLE function} gasm *gimple_build_asm_vec ( @ |
| 1051 const char *string, vec<tree, va_gc> *inputs, @ | |
| 1052 vec<tree, va_gc> *outputs, vec<tree, va_gc> *clobbers, @ | |
| 1053 vec<tree, va_gc> *labels) | |
| 0 | 1054 Build a @code{GIMPLE_ASM} statement. This statement is used for |
| 1055 building in-line assembly constructs. @code{STRING} is the assembly | |
| 111 | 1056 code. @code{INPUTS}, @code{OUTPUTS}, @code{CLOBBERS} and @code{LABELS} |
| 1057 are the inputs, outputs, clobbered registers and labels. | |
| 1058 @end deftypefn | |
| 1059 | |
| 1060 @deftypefn {GIMPLE function} unsigned gimple_asm_ninputs (const gasm *g) | |
| 1061 Return the number of input operands for @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1062 @end deftypefn |
| 1063 | |
| 111 | 1064 @deftypefn {GIMPLE function} unsigned gimple_asm_noutputs (const gasm *g) |
| 1065 Return the number of output operands for @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1066 @end deftypefn |
| 1067 | |
| 111 | 1068 @deftypefn {GIMPLE function} unsigned gimple_asm_nclobbers (const gasm *g) |
| 1069 Return the number of clobber operands for @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1070 @end deftypefn |
| 1071 | |
| 111 | 1072 @deftypefn {GIMPLE function} tree gimple_asm_input_op (const gasm *g, @ |
| 1073 unsigned index) | |
| 1074 Return input operand @code{INDEX} of @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1075 @end deftypefn |
| 1076 | |
| 111 | 1077 @deftypefn {GIMPLE function} void gimple_asm_set_input_op (gasm *g, @ |
| 1078 unsigned index, tree in_op) | |
| 1079 Set @code{IN_OP} to be input operand @code{INDEX} in @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1080 @end deftypefn |
| 1081 | |
| 111 | 1082 @deftypefn {GIMPLE function} tree gimple_asm_output_op (const gasm *g, @ |
| 1083 unsigned index) | |
| 1084 Return output operand @code{INDEX} of @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1085 @end deftypefn |
| 1086 | |
| 111 | 1087 @deftypefn {GIMPLE function} void gimple_asm_set_output_op (gasm *g, @ |
| 0 | 1088 unsigned index, tree out_op) |
| 111 | 1089 Set @code{OUT_OP} to be output operand @code{INDEX} in @code{GIMPLE_ASM} @code{G}. |
| 0 | 1090 @end deftypefn |
| 1091 | |
| 111 | 1092 @deftypefn {GIMPLE function} tree gimple_asm_clobber_op (const gasm *g, @ |
| 1093 unsigned index) | |
| 1094 Return clobber operand @code{INDEX} of @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1095 @end deftypefn |
| 1096 | |
| 111 | 1097 @deftypefn {GIMPLE function} void gimple_asm_set_clobber_op (gasm *g, @ |
| 1098 unsigned index, tree clobber_op) | |
| 1099 Set @code{CLOBBER_OP} to be clobber operand @code{INDEX} in @code{GIMPLE_ASM} @code{G}. | |
| 0 | 1100 @end deftypefn |
| 1101 | |
| 111 | 1102 @deftypefn {GIMPLE function} {const char *} gimple_asm_string (const gasm *g) |
| 0 | 1103 Return the string representing the assembly instruction in |
| 111 | 1104 @code{GIMPLE_ASM} @code{G}. |
| 0 | 1105 @end deftypefn |
| 1106 | |
| 111 | 1107 @deftypefn {GIMPLE function} bool gimple_asm_volatile_p (const gasm *g) |
| 1108 Return true if @code{G} is an asm statement marked volatile. | |
| 0 | 1109 @end deftypefn |
| 1110 | |
| 111 | 1111 @deftypefn {GIMPLE function} void gimple_asm_set_volatile (gasm *g, @ |
| 1112 bool volatile_p) | |
| 1113 Mark asm statement @code{G} as volatile or non-volatile based on | |
| 1114 @code{VOLATILE_P}. | |
| 0 | 1115 @end deftypefn |
| 1116 | |
| 1117 @node @code{GIMPLE_ASSIGN} | |
| 1118 @subsection @code{GIMPLE_ASSIGN} | |
| 1119 @cindex @code{GIMPLE_ASSIGN} | |
| 1120 | |
| 111 | 1121 @deftypefn {GIMPLE function} gassign *gimple_build_assign (tree lhs, tree rhs) |
| 0 | 1122 Build a @code{GIMPLE_ASSIGN} statement. The left-hand side is an lvalue |
| 1123 passed in lhs. The right-hand side can be either a unary or | |
| 1124 binary tree expression. The expression tree rhs will be | |
| 1125 flattened and its operands assigned to the corresponding operand | |
| 1126 slots in the new statement. This function is useful when you | |
| 1127 already have a tree expression that you want to convert into a | |
| 1128 tuple. However, try to avoid building expression trees for the | |
| 1129 sole purpose of calling this function. If you already have the | |
| 1130 operands in separate trees, it is better to use | |
| 111 | 1131 @code{gimple_build_assign} with @code{enum tree_code} argument and separate |
| 1132 arguments for each operand. | |
| 1133 @end deftypefn | |
| 1134 | |
| 1135 @deftypefn {GIMPLE function} gassign *gimple_build_assign @ | |
| 1136 (tree lhs, enum tree_code subcode, tree op1, tree op2, tree op3) | |
| 1137 This function is similar to two operand @code{gimple_build_assign}, | |
| 1138 but is used to build a @code{GIMPLE_ASSIGN} statement when the operands of the | |
| 1139 right-hand side of the assignment are already split into | |
| 1140 different operands. | |
| 1141 | |
| 1142 The left-hand side is an lvalue passed in lhs. Subcode is the | |
| 1143 @code{tree_code} for the right-hand side of the assignment. Op1, op2 and op3 | |
| 1144 are the operands. | |
| 0 | 1145 @end deftypefn |
| 1146 | |
| 111 | 1147 @deftypefn {GIMPLE function} gassign *gimple_build_assign @ |
| 1148 (tree lhs, enum tree_code subcode, tree op1, tree op2) | |
| 1149 Like the above 5 operand @code{gimple_build_assign}, but with the last | |
| 1150 argument @code{NULL} - this overload should not be used for | |
| 1151 @code{GIMPLE_TERNARY_RHS} assignments. | |
| 1152 @end deftypefn | |
| 1153 | |
| 1154 @deftypefn {GIMPLE function} gassign *gimple_build_assign @ | |
| 1155 (tree lhs, enum tree_code subcode, tree op1) | |
| 1156 Like the above 4 operand @code{gimple_build_assign}, but with the last | |
| 1157 argument @code{NULL} - this overload should be used only for | |
| 1158 @code{GIMPLE_UNARY_RHS} and @code{GIMPLE_SINGLE_RHS} assignments. | |
| 1159 @end deftypefn | |
| 0 | 1160 |
| 1161 @deftypefn {GIMPLE function} gimple gimplify_assign (tree dst, tree src, gimple_seq *seq_p) | |
| 1162 Build a new @code{GIMPLE_ASSIGN} tuple and append it to the end of | |
| 1163 @code{*SEQ_P}. | |
| 1164 @end deftypefn | |
| 1165 | |
| 1166 @code{DST}/@code{SRC} are the destination and source respectively. You can | |
| 1167 pass ungimplified trees in @code{DST} or @code{SRC}, in which | |
| 1168 case they will be converted to a gimple operand if necessary. | |
| 1169 | |
| 1170 This function returns the newly created @code{GIMPLE_ASSIGN} tuple. | |
| 1171 | |
|
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1172 @deftypefn {GIMPLE function} {enum tree_code} gimple_assign_rhs_code (gimple g) |
| 0 | 1173 Return the code of the expression computed on the @code{RHS} of |
| 1174 assignment statement @code{G}. | |
| 1175 @end deftypefn | |
| 111 | 1176 |
| 0 | 1177 |
|
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1178 @deftypefn {GIMPLE function} {enum gimple_rhs_class} gimple_assign_rhs_class (gimple g) |
| 0 | 1179 Return the gimple rhs class of the code for the expression |
| 1180 computed on the rhs of assignment statement @code{G}. This will never | |
| 1181 return @code{GIMPLE_INVALID_RHS}. | |
| 1182 @end deftypefn | |
| 1183 | |
| 1184 @deftypefn {GIMPLE function} tree gimple_assign_lhs (gimple g) | |
| 1185 Return the @code{LHS} of assignment statement @code{G}. | |
| 1186 @end deftypefn | |
| 111 | 1187 |
|
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1188 @deftypefn {GIMPLE function} {tree *} gimple_assign_lhs_ptr (gimple g) |
| 0 | 1189 Return a pointer to the @code{LHS} of assignment statement @code{G}. |
| 1190 @end deftypefn | |
| 111 | 1191 |
| 0 | 1192 @deftypefn {GIMPLE function} tree gimple_assign_rhs1 (gimple g) |
| 1193 Return the first operand on the @code{RHS} of assignment statement @code{G}. | |
| 1194 @end deftypefn | |
| 111 | 1195 |
|
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1196 @deftypefn {GIMPLE function} {tree *} gimple_assign_rhs1_ptr (gimple g) |
| 0 | 1197 Return the address of the first operand on the @code{RHS} of assignment |
| 1198 statement @code{G}. | |
| 1199 @end deftypefn | |
| 111 | 1200 |
| 0 | 1201 @deftypefn {GIMPLE function} tree gimple_assign_rhs2 (gimple g) |
| 1202 Return the second operand on the @code{RHS} of assignment statement @code{G}. | |
| 1203 @end deftypefn | |
| 111 | 1204 |
|
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1205 @deftypefn {GIMPLE function} {tree *} gimple_assign_rhs2_ptr (gimple g) |
| 0 | 1206 Return the address of the second operand on the @code{RHS} of assignment |
| 1207 statement @code{G}. | |
| 1208 @end deftypefn | |
|
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1209 |
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1210 @deftypefn {GIMPLE function} tree gimple_assign_rhs3 (gimple g) |
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1211 Return the third operand on the @code{RHS} of assignment statement @code{G}. |
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1212 @end deftypefn |
| 111 | 1213 |
|
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1214 @deftypefn {GIMPLE function} {tree *} gimple_assign_rhs3_ptr (gimple g) |
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1215 Return the address of the third operand on the @code{RHS} of assignment |
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1216 statement @code{G}. |
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1217 @end deftypefn |
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1218 |
| 0 | 1219 @deftypefn {GIMPLE function} void gimple_assign_set_lhs (gimple g, tree lhs) |
| 1220 Set @code{LHS} to be the @code{LHS} operand of assignment statement @code{G}. | |
| 1221 @end deftypefn | |
| 111 | 1222 |
| 0 | 1223 @deftypefn {GIMPLE function} void gimple_assign_set_rhs1 (gimple g, tree rhs) |
| 1224 Set @code{RHS} to be the first operand on the @code{RHS} of assignment | |
| 1225 statement @code{G}. | |
| 1226 @end deftypefn | |
| 111 | 1227 |
|
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1228 @deftypefn {GIMPLE function} void gimple_assign_set_rhs2 (gimple g, tree rhs) |
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1229 Set @code{RHS} to be the second operand on the @code{RHS} of assignment |
| 0 | 1230 statement @code{G}. |
| 1231 @end deftypefn | |
| 111 | 1232 |
|
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1233 @deftypefn {GIMPLE function} void gimple_assign_set_rhs3 (gimple g, tree rhs) |
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1234 Set @code{RHS} to be the third operand on the @code{RHS} of assignment |
| 0 | 1235 statement @code{G}. |
| 1236 @end deftypefn | |
| 111 | 1237 |
| 1238 @deftypefn {GIMPLE function} bool gimple_assign_cast_p (const_gimple s) | |
|
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1239 Return true if @code{S} is a type-cast assignment. |
| 0 | 1240 @end deftypefn |
| 1241 | |
| 1242 | |
| 1243 @node @code{GIMPLE_BIND} | |
| 1244 @subsection @code{GIMPLE_BIND} | |
| 1245 @cindex @code{GIMPLE_BIND} | |
| 1246 | |
| 111 | 1247 @deftypefn {GIMPLE function} gbind *gimple_build_bind (tree vars, @ |
| 1248 gimple_seq body) | |
| 0 | 1249 Build a @code{GIMPLE_BIND} statement with a list of variables in @code{VARS} |
| 1250 and a body of statements in sequence @code{BODY}. | |
| 1251 @end deftypefn | |
| 1252 | |
| 111 | 1253 @deftypefn {GIMPLE function} tree gimple_bind_vars (const gbind *g) |
| 1254 Return the variables declared in the @code{GIMPLE_BIND} statement @code{G}. | |
| 0 | 1255 @end deftypefn |
| 1256 | |
| 111 | 1257 @deftypefn {GIMPLE function} void gimple_bind_set_vars (gbind *g, tree vars) |
| 0 | 1258 Set @code{VARS} to be the set of variables declared in the @code{GIMPLE_BIND} |
| 111 | 1259 statement @code{G}. |
| 0 | 1260 @end deftypefn |
| 1261 | |
| 111 | 1262 @deftypefn {GIMPLE function} void gimple_bind_append_vars (gbind *g, tree vars) |
| 0 | 1263 Append @code{VARS} to the set of variables declared in the @code{GIMPLE_BIND} |
| 1264 statement @code{G}. | |
| 1265 @end deftypefn | |
| 1266 | |
| 111 | 1267 @deftypefn {GIMPLE function} gimple_seq gimple_bind_body (gbind *g) |
| 0 | 1268 Return the GIMPLE sequence contained in the @code{GIMPLE_BIND} statement |
| 111 | 1269 @code{G}. |
| 0 | 1270 @end deftypefn |
| 1271 | |
| 111 | 1272 @deftypefn {GIMPLE function} void gimple_bind_set_body (gbind *g, @ |
| 1273 gimple_seq seq) | |
| 0 | 1274 Set @code{SEQ} to be sequence contained in the @code{GIMPLE_BIND} statement @code{G}. |
| 1275 @end deftypefn | |
| 1276 | |
| 111 | 1277 @deftypefn {GIMPLE function} void gimple_bind_add_stmt (gbind *gs, gimple stmt) |
| 1278 Append a statement to the end of a @code{GIMPLE_BIND}'s body. | |
| 0 | 1279 @end deftypefn |
| 1280 | |
| 111 | 1281 @deftypefn {GIMPLE function} void gimple_bind_add_seq (gbind *gs, @ |
| 1282 gimple_seq seq) | |
| 0 | 1283 Append a sequence of statements to the end of a @code{GIMPLE_BIND}'s |
| 1284 body. | |
| 1285 @end deftypefn | |
| 1286 | |
| 111 | 1287 @deftypefn {GIMPLE function} tree gimple_bind_block (const gbind *g) |
| 0 | 1288 Return the @code{TREE_BLOCK} node associated with @code{GIMPLE_BIND} statement |
| 111 | 1289 @code{G}. This is analogous to the @code{BIND_EXPR_BLOCK} field in trees. |
| 0 | 1290 @end deftypefn |
| 1291 | |
| 111 | 1292 @deftypefn {GIMPLE function} void gimple_bind_set_block (gbind *g, tree block) |
| 0 | 1293 Set @code{BLOCK} to be the @code{TREE_BLOCK} node associated with @code{GIMPLE_BIND} |
| 111 | 1294 statement @code{G}. |
| 0 | 1295 @end deftypefn |
| 1296 | |
| 1297 | |
| 1298 @node @code{GIMPLE_CALL} | |
| 1299 @subsection @code{GIMPLE_CALL} | |
| 1300 @cindex @code{GIMPLE_CALL} | |
| 1301 | |
| 111 | 1302 @deftypefn {GIMPLE function} gcall *gimple_build_call (tree fn, @ |
| 1303 unsigned nargs, ...) | |
| 0 | 1304 Build a @code{GIMPLE_CALL} statement to function @code{FN}. The argument @code{FN} |
| 1305 must be either a @code{FUNCTION_DECL} or a gimple call address as | |
| 1306 determined by @code{is_gimple_call_addr}. @code{NARGS} are the number of | |
| 1307 arguments. The rest of the arguments follow the argument @code{NARGS}, | |
| 1308 and must be trees that are valid as rvalues in gimple (i.e., each | |
| 1309 operand is validated with @code{is_gimple_operand}). | |
| 1310 @end deftypefn | |
| 1311 | |
| 1312 | |
| 111 | 1313 @deftypefn {GIMPLE function} gcall *gimple_build_call_from_tree (tree call_expr, @ |
| 1314 tree fnptrtype) | |
| 1315 Build a @code{GIMPLE_CALL} from a @code{CALL_EXPR} node. The arguments | |
| 1316 and the function are taken from the expression directly. The type of the | |
| 1317 @code{GIMPLE_CALL} is set from the second parameter passed by a caller. | |
| 1318 This routine assumes that @code{call_expr} is already in GIMPLE form. | |
| 1319 That is, its operands are GIMPLE values and the function call needs no further | |
| 0 | 1320 simplification. All the call flags in @code{call_expr} are copied over |
| 1321 to the new @code{GIMPLE_CALL}. | |
| 1322 @end deftypefn | |
| 1323 | |
| 111 | 1324 @deftypefn {GIMPLE function} gcall *gimple_build_call_vec (tree fn, @ |
| 1325 @code{vec<tree>} args) | |
| 0 | 1326 Identical to @code{gimple_build_call} but the arguments are stored in a |
| 111 | 1327 @code{vec<tree>}. |
| 0 | 1328 @end deftypefn |
| 1329 | |
| 1330 @deftypefn {GIMPLE function} tree gimple_call_lhs (gimple g) | |
| 1331 Return the @code{LHS} of call statement @code{G}. | |
| 1332 @end deftypefn | |
| 111 | 1333 |
|
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1334 @deftypefn {GIMPLE function} {tree *} gimple_call_lhs_ptr (gimple g) |
| 0 | 1335 Return a pointer to the @code{LHS} of call statement @code{G}. |
| 1336 @end deftypefn | |
| 111 | 1337 |
| 0 | 1338 @deftypefn {GIMPLE function} void gimple_call_set_lhs (gimple g, tree lhs) |
| 1339 Set @code{LHS} to be the @code{LHS} operand of call statement @code{G}. | |
| 1340 @end deftypefn | |
| 111 | 1341 |
| 0 | 1342 @deftypefn {GIMPLE function} tree gimple_call_fn (gimple g) |
| 1343 Return the tree node representing the function called by call | |
| 1344 statement @code{G}. | |
| 1345 @end deftypefn | |
| 111 | 1346 |
| 1347 @deftypefn {GIMPLE function} void gimple_call_set_fn (gcall *g, tree fn) | |
| 0 | 1348 Set @code{FN} to be the function called by call statement @code{G}. This has |
| 1349 to be a gimple value specifying the address of the called | |
| 1350 function. | |
| 1351 @end deftypefn | |
| 111 | 1352 |
| 0 | 1353 @deftypefn {GIMPLE function} tree gimple_call_fndecl (gimple g) |
| 1354 If a given @code{GIMPLE_CALL}'s callee is a @code{FUNCTION_DECL}, return it. | |
| 1355 Otherwise return @code{NULL}. This function is analogous to | |
| 1356 @code{get_callee_fndecl} in @code{GENERIC}. | |
| 1357 @end deftypefn | |
| 111 | 1358 |
| 0 | 1359 @deftypefn {GIMPLE function} tree gimple_call_set_fndecl (gimple g, tree fndecl) |
| 1360 Set the called function to @code{FNDECL}. | |
| 1361 @end deftypefn | |
| 1362 | |
| 111 | 1363 @deftypefn {GIMPLE function} tree gimple_call_return_type (const gcall *g) |
| 0 | 1364 Return the type returned by call statement @code{G}. |
| 1365 @end deftypefn | |
| 111 | 1366 |
| 0 | 1367 @deftypefn {GIMPLE function} tree gimple_call_chain (gimple g) |
| 111 | 1368 Return the static chain for call statement @code{G}. |
| 0 | 1369 @end deftypefn |
| 1370 | |
| 111 | 1371 @deftypefn {GIMPLE function} void gimple_call_set_chain (gcall *g, tree chain) |
| 1372 Set @code{CHAIN} to be the static chain for call statement @code{G}. | |
| 0 | 1373 @end deftypefn |
| 1374 | |
|
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1375 @deftypefn {GIMPLE function} unsigned gimple_call_num_args (gimple g) |
| 111 | 1376 Return the number of arguments used by call statement @code{G}. |
| 0 | 1377 @end deftypefn |
| 1378 | |
| 1379 @deftypefn {GIMPLE function} tree gimple_call_arg (gimple g, unsigned index) | |
| 1380 Return the argument at position @code{INDEX} for call statement @code{G}. The | |
| 1381 first argument is 0. | |
| 1382 @end deftypefn | |
| 111 | 1383 |
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1384 @deftypefn {GIMPLE function} {tree *} gimple_call_arg_ptr (gimple g, unsigned index) |
| 0 | 1385 Return a pointer to the argument at position @code{INDEX} for call |
| 111 | 1386 statement @code{G}. |
| 0 | 1387 @end deftypefn |
| 1388 | |
| 1389 @deftypefn {GIMPLE function} void gimple_call_set_arg (gimple g, unsigned index, tree arg) | |
| 1390 Set @code{ARG} to be the argument at position @code{INDEX} for call statement | |
| 111 | 1391 @code{G}. |
| 0 | 1392 @end deftypefn |
| 1393 | |
| 111 | 1394 @deftypefn {GIMPLE function} void gimple_call_set_tail (gcall *s) |
| 0 | 1395 Mark call statement @code{S} as being a tail call (i.e., a call just |
| 1396 before the exit of a function). These calls are candidate for | |
| 111 | 1397 tail call optimization. |
| 0 | 1398 @end deftypefn |
| 1399 | |
| 111 | 1400 @deftypefn {GIMPLE function} bool gimple_call_tail_p (gcall *s) |
| 1401 Return true if @code{GIMPLE_CALL} @code{S} is marked as a tail call. | |
| 0 | 1402 @end deftypefn |
| 1403 | |
| 1404 @deftypefn {GIMPLE function} bool gimple_call_noreturn_p (gimple s) | |
| 111 | 1405 Return true if @code{S} is a noreturn call. |
| 0 | 1406 @end deftypefn |
| 1407 | |
| 111 | 1408 @deftypefn {GIMPLE function} gimple gimple_call_copy_skip_args (gcall *stmt, @ |
| 1409 bitmap args_to_skip) | |
| 0 | 1410 Build a @code{GIMPLE_CALL} identical to @code{STMT} but skipping the arguments |
| 1411 in the positions marked by the set @code{ARGS_TO_SKIP}. | |
| 1412 @end deftypefn | |
| 1413 | |
| 1414 | |
| 1415 @node @code{GIMPLE_CATCH} | |
| 1416 @subsection @code{GIMPLE_CATCH} | |
| 1417 @cindex @code{GIMPLE_CATCH} | |
| 1418 | |
| 111 | 1419 @deftypefn {GIMPLE function} gcatch *gimple_build_catch (tree types, @ |
| 1420 gimple_seq handler) | |
| 0 | 1421 Build a @code{GIMPLE_CATCH} statement. @code{TYPES} are the tree types this |
| 1422 catch handles. @code{HANDLER} is a sequence of statements with the code | |
| 1423 for the handler. | |
| 1424 @end deftypefn | |
| 1425 | |
| 111 | 1426 @deftypefn {GIMPLE function} tree gimple_catch_types (const gcatch *g) |
| 1427 Return the types handled by @code{GIMPLE_CATCH} statement @code{G}. | |
| 0 | 1428 @end deftypefn |
| 1429 | |
| 111 | 1430 @deftypefn {GIMPLE function} {tree *} gimple_catch_types_ptr (gcatch *g) |
| 0 | 1431 Return a pointer to the types handled by @code{GIMPLE_CATCH} statement |
| 111 | 1432 @code{G}. |
| 0 | 1433 @end deftypefn |
| 1434 | |
| 111 | 1435 @deftypefn {GIMPLE function} gimple_seq gimple_catch_handler (gcatch *g) |
| 0 | 1436 Return the GIMPLE sequence representing the body of the handler |
| 111 | 1437 of @code{GIMPLE_CATCH} statement @code{G}. |
| 0 | 1438 @end deftypefn |
| 1439 | |
| 111 | 1440 @deftypefn {GIMPLE function} void gimple_catch_set_types (gcatch *g, tree t) |
| 1441 Set @code{T} to be the set of types handled by @code{GIMPLE_CATCH} @code{G}. | |
| 0 | 1442 @end deftypefn |
| 1443 | |
| 111 | 1444 @deftypefn {GIMPLE function} void gimple_catch_set_handler (gcatch *g, @ |
| 1445 gimple_seq handler) | |
| 1446 Set @code{HANDLER} to be the body of @code{GIMPLE_CATCH} @code{G}. | |
| 0 | 1447 @end deftypefn |
| 1448 | |
| 1449 | |
| 1450 @node @code{GIMPLE_COND} | |
| 1451 @subsection @code{GIMPLE_COND} | |
| 1452 @cindex @code{GIMPLE_COND} | |
| 1453 | |
| 111 | 1454 @deftypefn {GIMPLE function} gcond *gimple_build_cond ( @ |
| 1455 enum tree_code pred_code, tree lhs, tree rhs, tree t_label, tree f_label) | |
| 0 | 1456 Build a @code{GIMPLE_COND} statement. @code{A} @code{GIMPLE_COND} statement compares |
| 1457 @code{LHS} and @code{RHS} and if the condition in @code{PRED_CODE} is true, jump to | |
| 1458 the label in @code{t_label}, otherwise jump to the label in @code{f_label}. | |
| 1459 @code{PRED_CODE} are relational operator tree codes like @code{EQ_EXPR}, | |
| 1460 @code{LT_EXPR}, @code{LE_EXPR}, @code{NE_EXPR}, etc. | |
| 1461 @end deftypefn | |
| 1462 | |
| 1463 | |
| 111 | 1464 @deftypefn {GIMPLE function} gcond *gimple_build_cond_from_tree (tree cond, @ |
| 1465 tree t_label, tree f_label) | |
| 0 | 1466 Build a @code{GIMPLE_COND} statement from the conditional expression |
| 1467 tree @code{COND}. @code{T_LABEL} and @code{F_LABEL} are as in @code{gimple_build_cond}. | |
| 1468 @end deftypefn | |
| 1469 | |
|
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1470 @deftypefn {GIMPLE function} {enum tree_code} gimple_cond_code (gimple g) |
| 0 | 1471 Return the code of the predicate computed by conditional |
| 111 | 1472 statement @code{G}. |
| 0 | 1473 @end deftypefn |
| 1474 | |
| 111 | 1475 @deftypefn {GIMPLE function} void gimple_cond_set_code (gcond *g, @ |
| 1476 enum tree_code code) | |
| 0 | 1477 Set @code{CODE} to be the predicate code for the conditional statement |
| 111 | 1478 @code{G}. |
| 0 | 1479 @end deftypefn |
| 1480 | |
| 1481 @deftypefn {GIMPLE function} tree gimple_cond_lhs (gimple g) | |
| 1482 Return the @code{LHS} of the predicate computed by conditional statement | |
| 111 | 1483 @code{G}. |
| 0 | 1484 @end deftypefn |
| 1485 | |
| 111 | 1486 @deftypefn {GIMPLE function} void gimple_cond_set_lhs (gcond *g, tree lhs) |
| 0 | 1487 Set @code{LHS} to be the @code{LHS} operand of the predicate computed by |
| 111 | 1488 conditional statement @code{G}. |
| 0 | 1489 @end deftypefn |
| 1490 | |
| 1491 @deftypefn {GIMPLE function} tree gimple_cond_rhs (gimple g) | |
| 1492 Return the @code{RHS} operand of the predicate computed by conditional | |
| 111 | 1493 @code{G}. |
| 0 | 1494 @end deftypefn |
| 1495 | |
| 111 | 1496 @deftypefn {GIMPLE function} void gimple_cond_set_rhs (gcond *g, tree rhs) |
| 0 | 1497 Set @code{RHS} to be the @code{RHS} operand of the predicate computed by |
| 111 | 1498 conditional statement @code{G}. |
| 0 | 1499 @end deftypefn |
| 1500 | |
| 111 | 1501 @deftypefn {GIMPLE function} tree gimple_cond_true_label (const gcond *g) |
| 0 | 1502 Return the label used by conditional statement @code{G} when its |
| 111 | 1503 predicate evaluates to true. |
| 0 | 1504 @end deftypefn |
| 1505 | |
| 111 | 1506 @deftypefn {GIMPLE function} void gimple_cond_set_true_label (gcond *g, tree label) |
| 0 | 1507 Set @code{LABEL} to be the label used by conditional statement @code{G} when |
| 111 | 1508 its predicate evaluates to true. |
| 0 | 1509 @end deftypefn |
| 1510 | |
| 111 | 1511 @deftypefn {GIMPLE function} void gimple_cond_set_false_label (gcond *g, tree label) |
| 0 | 1512 Set @code{LABEL} to be the label used by conditional statement @code{G} when |
| 111 | 1513 its predicate evaluates to false. |
| 0 | 1514 @end deftypefn |
| 1515 | |
| 111 | 1516 @deftypefn {GIMPLE function} tree gimple_cond_false_label (const gcond *g) |
| 0 | 1517 Return the label used by conditional statement @code{G} when its |
| 111 | 1518 predicate evaluates to false. |
| 0 | 1519 @end deftypefn |
| 1520 | |
| 111 | 1521 @deftypefn {GIMPLE function} void gimple_cond_make_false (gcond *g) |
| 1522 Set the conditional @code{COND_STMT} to be of the form 'if (1 == 0)'. | |
| 0 | 1523 @end deftypefn |
| 1524 | |
| 111 | 1525 @deftypefn {GIMPLE function} void gimple_cond_make_true (gcond *g) |
| 1526 Set the conditional @code{COND_STMT} to be of the form 'if (1 == 1)'. | |
| 0 | 1527 @end deftypefn |
| 1528 | |
|
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1529 @node @code{GIMPLE_DEBUG} |
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1530 @subsection @code{GIMPLE_DEBUG} |
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1531 @cindex @code{GIMPLE_DEBUG} |
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1532 @cindex @code{GIMPLE_DEBUG_BIND} |
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1533 |
| 111 | 1534 @deftypefn {GIMPLE function} gdebug *gimple_build_debug_bind (tree var, @ |
| 1535 tree value, gimple stmt) | |
|
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1536 Build a @code{GIMPLE_DEBUG} statement with @code{GIMPLE_DEBUG_BIND} of |
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1537 @code{subcode}. The effect of this statement is to tell debug |
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1538 information generation machinery that the value of user variable |
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1539 @code{var} is given by @code{value} at that point, and to remain with |
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1540 that value until @code{var} runs out of scope, a |
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1541 dynamically-subsequent debug bind statement overrides the binding, or |
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1542 conflicting values reach a control flow merge point. Even if |
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1543 components of the @code{value} expression change afterwards, the |
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1544 variable is supposed to retain the same value, though not necessarily |
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1545 the same location. |
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1546 |
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1547 It is expected that @code{var} be most often a tree for automatic user |
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1548 variables (@code{VAR_DECL} or @code{PARM_DECL}) that satisfy the |
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1549 requirements for gimple registers, but it may also be a tree for a |
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1550 scalarized component of a user variable (@code{ARRAY_REF}, |
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1551 @code{COMPONENT_REF}), or a debug temporary (@code{DEBUG_EXPR_DECL}). |
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1552 |
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1553 As for @code{value}, it can be an arbitrary tree expression, but it is |
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1554 recommended that it be in a suitable form for a gimple assignment |
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1555 @code{RHS}. It is not expected that user variables that could appear |
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1556 as @code{var} ever appear in @code{value}, because in the latter we'd |
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1557 have their @code{SSA_NAME}s instead, but even if they were not in SSA |
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1558 form, user variables appearing in @code{value} are to be regarded as |
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1559 part of the executable code space, whereas those in @code{var} are to |
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1560 be regarded as part of the source code space. There is no way to |
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1561 refer to the value bound to a user variable within a @code{value} |
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1562 expression. |
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1563 |
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1564 If @code{value} is @code{GIMPLE_DEBUG_BIND_NOVALUE}, debug information |
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1565 generation machinery is informed that the variable @code{var} is |
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1566 unbound, i.e., that its value is indeterminate, which sometimes means |
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1567 it is really unavailable, and other times that the compiler could not |
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1568 keep track of it. |
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1569 |
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1570 Block and location information for the newly-created stmt are |
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1571 taken from @code{stmt}, if given. |
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1572 @end deftypefn |
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1573 |
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1574 @deftypefn {GIMPLE function} tree gimple_debug_bind_get_var (gimple stmt) |
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1575 Return the user variable @var{var} that is bound at @code{stmt}. |
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1576 @end deftypefn |
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1577 |
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1578 @deftypefn {GIMPLE function} tree gimple_debug_bind_get_value (gimple stmt) |
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1579 Return the value expression that is bound to a user variable at |
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1580 @code{stmt}. |
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1581 @end deftypefn |
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1582 |
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1583 @deftypefn {GIMPLE function} {tree *} gimple_debug_bind_get_value_ptr (gimple stmt) |
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1584 Return a pointer to the value expression that is bound to a user |
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1585 variable at @code{stmt}. |
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1586 @end deftypefn |
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1587 |
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1588 @deftypefn {GIMPLE function} void gimple_debug_bind_set_var (gimple stmt, tree var) |
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1589 Modify the user variable bound at @code{stmt} to @var{var}. |
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1590 @end deftypefn |
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1591 |
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1592 @deftypefn {GIMPLE function} void gimple_debug_bind_set_value (gimple stmt, tree var) |
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1593 Modify the value bound to the user variable bound at @code{stmt} to |
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1594 @var{value}. |
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1595 @end deftypefn |
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1596 |
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1597 @deftypefn {GIMPLE function} void gimple_debug_bind_reset_value (gimple stmt) |
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1598 Modify the value bound to the user variable bound at @code{stmt} so |
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1599 that the variable becomes unbound. |
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1600 @end deftypefn |
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1601 |
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1602 @deftypefn {GIMPLE function} bool gimple_debug_bind_has_value_p (gimple stmt) |
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1603 Return @code{TRUE} if @code{stmt} binds a user variable to a value, |
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1604 and @code{FALSE} if it unbinds the variable. |
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1605 @end deftypefn |
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1606 |
| 0 | 1607 @node @code{GIMPLE_EH_FILTER} |
| 1608 @subsection @code{GIMPLE_EH_FILTER} | |
| 1609 @cindex @code{GIMPLE_EH_FILTER} | |
| 1610 | |
| 111 | 1611 @deftypefn {GIMPLE function} geh_filter *gimple_build_eh_filter (tree types, @ |
| 1612 gimple_seq failure) | |
| 0 | 1613 Build a @code{GIMPLE_EH_FILTER} statement. @code{TYPES} are the filter's |
| 1614 types. @code{FAILURE} is a sequence with the filter's failure action. | |
| 1615 @end deftypefn | |
| 1616 | |
| 1617 @deftypefn {GIMPLE function} tree gimple_eh_filter_types (gimple g) | |
| 111 | 1618 Return the types handled by @code{GIMPLE_EH_FILTER} statement @code{G}. |
| 0 | 1619 @end deftypefn |
| 1620 | |
|
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1621 @deftypefn {GIMPLE function} {tree *} gimple_eh_filter_types_ptr (gimple g) |
| 0 | 1622 Return a pointer to the types handled by @code{GIMPLE_EH_FILTER} |
| 111 | 1623 statement @code{G}. |
| 0 | 1624 @end deftypefn |
| 1625 | |
| 1626 @deftypefn {GIMPLE function} gimple_seq gimple_eh_filter_failure (gimple g) | |
| 1627 Return the sequence of statement to execute when @code{GIMPLE_EH_FILTER} | |
| 111 | 1628 statement fails. |
| 0 | 1629 @end deftypefn |
| 1630 | |
| 111 | 1631 @deftypefn {GIMPLE function} void gimple_eh_filter_set_types (geh_filter *g, @ |
| 1632 tree types) | |
| 1633 Set @code{TYPES} to be the set of types handled by @code{GIMPLE_EH_FILTER} @code{G}. | |
| 0 | 1634 @end deftypefn |
| 1635 | |
| 111 | 1636 @deftypefn {GIMPLE function} void gimple_eh_filter_set_failure (geh_filter *g, @ |
| 1637 gimple_seq failure) | |
| 0 | 1638 Set @code{FAILURE} to be the sequence of statements to execute on |
| 111 | 1639 failure for @code{GIMPLE_EH_FILTER} @code{G}. |
| 0 | 1640 @end deftypefn |
| 1641 | |
| 111 | 1642 @deftypefn {GIMPLE function} tree gimple_eh_must_not_throw_fndecl ( @ |
| 1643 geh_mnt *eh_mnt_stmt) | |
| 1644 Get the function decl to be called by the MUST_NOT_THROW region. | |
| 0 | 1645 @end deftypefn |
| 1646 | |
| 111 | 1647 @deftypefn {GIMPLE function} void gimple_eh_must_not_throw_set_fndecl ( @ |
| 1648 geh_mnt *eh_mnt_stmt, tree decl) | |
| 1649 Set the function decl to be called by GS to DECL. | |
| 0 | 1650 @end deftypefn |
| 1651 | |
| 1652 | |
| 1653 @node @code{GIMPLE_LABEL} | |
| 1654 @subsection @code{GIMPLE_LABEL} | |
| 1655 @cindex @code{GIMPLE_LABEL} | |
| 1656 | |
| 111 | 1657 @deftypefn {GIMPLE function} glabel *gimple_build_label (tree label) |
| 0 | 1658 Build a @code{GIMPLE_LABEL} statement with corresponding to the tree |
| 1659 label, @code{LABEL}. | |
| 1660 @end deftypefn | |
| 1661 | |
| 111 | 1662 @deftypefn {GIMPLE function} tree gimple_label_label (const glabel *g) |
| 1663 Return the @code{LABEL_DECL} node used by @code{GIMPLE_LABEL} statement @code{G}. | |
| 0 | 1664 @end deftypefn |
| 1665 | |
| 111 | 1666 @deftypefn {GIMPLE function} void gimple_label_set_label (glabel *g, tree label) |
| 0 | 1667 Set @code{LABEL} to be the @code{LABEL_DECL} node used by @code{GIMPLE_LABEL} |
| 111 | 1668 statement @code{G}. |
| 0 | 1669 @end deftypefn |
| 1670 | |
| 111 | 1671 @node @code{GIMPLE_GOTO} |
| 1672 @subsection @code{GIMPLE_GOTO} | |
| 1673 @cindex @code{GIMPLE_GOTO} | |
| 1674 | |
| 1675 @deftypefn {GIMPLE function} ggoto *gimple_build_goto (tree dest) | |
| 0 | 1676 Build a @code{GIMPLE_GOTO} statement to label @code{DEST}. |
| 1677 @end deftypefn | |
| 1678 | |
| 1679 @deftypefn {GIMPLE function} tree gimple_goto_dest (gimple g) | |
| 111 | 1680 Return the destination of the unconditional jump @code{G}. |
| 0 | 1681 @end deftypefn |
| 1682 | |
| 111 | 1683 @deftypefn {GIMPLE function} void gimple_goto_set_dest (ggoto *g, tree dest) |
| 0 | 1684 Set @code{DEST} to be the destination of the unconditional jump @code{G}. |
| 1685 @end deftypefn | |
| 1686 | |
| 1687 | |
| 1688 @node @code{GIMPLE_NOP} | |
| 1689 @subsection @code{GIMPLE_NOP} | |
| 1690 @cindex @code{GIMPLE_NOP} | |
| 1691 | |
| 1692 @deftypefn {GIMPLE function} gimple gimple_build_nop (void) | |
| 1693 Build a @code{GIMPLE_NOP} statement. | |
| 1694 @end deftypefn | |
| 1695 | |
| 1696 @deftypefn {GIMPLE function} bool gimple_nop_p (gimple g) | |
| 111 | 1697 Returns @code{TRUE} if statement @code{G} is a @code{GIMPLE_NOP}. |
| 0 | 1698 @end deftypefn |
| 1699 | |
| 1700 @node @code{GIMPLE_OMP_ATOMIC_LOAD} | |
| 1701 @subsection @code{GIMPLE_OMP_ATOMIC_LOAD} | |
| 1702 @cindex @code{GIMPLE_OMP_ATOMIC_LOAD} | |
| 1703 | |
| 111 | 1704 @deftypefn {GIMPLE function} gomp_atomic_load *gimple_build_omp_atomic_load ( @ |
| 1705 tree lhs, tree rhs) | |
| 0 | 1706 Build a @code{GIMPLE_OMP_ATOMIC_LOAD} statement. @code{LHS} is the left-hand |
| 1707 side of the assignment. @code{RHS} is the right-hand side of the | |
| 1708 assignment. | |
| 1709 @end deftypefn | |
| 1710 | |
| 111 | 1711 @deftypefn {GIMPLE function} void gimple_omp_atomic_load_set_lhs ( @ |
| 1712 gomp_atomic_load *g, tree lhs) | |
| 1713 Set the @code{LHS} of an atomic load. | |
| 0 | 1714 @end deftypefn |
| 1715 | |
| 111 | 1716 @deftypefn {GIMPLE function} tree gimple_omp_atomic_load_lhs ( @ |
| 1717 const gomp_atomic_load *g) | |
| 1718 Get the @code{LHS} of an atomic load. | |
| 0 | 1719 @end deftypefn |
| 1720 | |
| 111 | 1721 @deftypefn {GIMPLE function} void gimple_omp_atomic_load_set_rhs ( @ |
| 1722 gomp_atomic_load *g, tree rhs) | |
| 1723 Set the @code{RHS} of an atomic set. | |
| 0 | 1724 @end deftypefn |
| 1725 | |
| 111 | 1726 @deftypefn {GIMPLE function} tree gimple_omp_atomic_load_rhs ( @ |
| 1727 const gomp_atomic_load *g) | |
| 1728 Get the @code{RHS} of an atomic set. | |
| 0 | 1729 @end deftypefn |
| 1730 | |
| 1731 | |
| 1732 @node @code{GIMPLE_OMP_ATOMIC_STORE} | |
| 1733 @subsection @code{GIMPLE_OMP_ATOMIC_STORE} | |
| 1734 @cindex @code{GIMPLE_OMP_ATOMIC_STORE} | |
| 1735 | |
| 111 | 1736 @deftypefn {GIMPLE function} gomp_atomic_store *gimple_build_omp_atomic_store ( @ |
| 1737 tree val) | |
| 0 | 1738 Build a @code{GIMPLE_OMP_ATOMIC_STORE} statement. @code{VAL} is the value to be |
| 1739 stored. | |
| 1740 @end deftypefn | |
| 1741 | |
| 111 | 1742 @deftypefn {GIMPLE function} void gimple_omp_atomic_store_set_val ( @ |
| 1743 gomp_atomic_store *g, tree val) | |
| 1744 Set the value being stored in an atomic store. | |
| 0 | 1745 @end deftypefn |
| 1746 | |
| 111 | 1747 @deftypefn {GIMPLE function} tree gimple_omp_atomic_store_val ( @ |
| 1748 const gomp_atomic_store *g) | |
| 1749 Return the value being stored in an atomic store. | |
| 0 | 1750 @end deftypefn |
| 1751 | |
| 1752 @node @code{GIMPLE_OMP_CONTINUE} | |
| 1753 @subsection @code{GIMPLE_OMP_CONTINUE} | |
| 1754 @cindex @code{GIMPLE_OMP_CONTINUE} | |
| 1755 | |
| 111 | 1756 @deftypefn {GIMPLE function} gomp_continue *gimple_build_omp_continue ( @ |
| 1757 tree control_def, tree control_use) | |
| 0 | 1758 Build a @code{GIMPLE_OMP_CONTINUE} statement. @code{CONTROL_DEF} is the |
| 1759 definition of the control variable. @code{CONTROL_USE} is the use of | |
| 1760 the control variable. | |
| 1761 @end deftypefn | |
| 1762 | |
| 111 | 1763 @deftypefn {GIMPLE function} tree gimple_omp_continue_control_def ( @ |
| 1764 const gomp_continue *s) | |
| 0 | 1765 Return the definition of the control variable on a |
| 1766 @code{GIMPLE_OMP_CONTINUE} in @code{S}. | |
| 1767 @end deftypefn | |
| 111 | 1768 |
| 1769 @deftypefn {GIMPLE function} tree gimple_omp_continue_control_def_ptr ( @ | |
| 1770 gomp_continue *s) | |
| 0 | 1771 Same as above, but return the pointer. |
| 1772 @end deftypefn | |
| 111 | 1773 |
| 1774 @deftypefn {GIMPLE function} tree gimple_omp_continue_set_control_def ( @ | |
| 1775 gomp_continue *s) | |
| 0 | 1776 Set the control variable definition for a @code{GIMPLE_OMP_CONTINUE} |
| 1777 statement in @code{S}. | |
| 1778 @end deftypefn | |
| 111 | 1779 |
| 1780 @deftypefn {GIMPLE function} tree gimple_omp_continue_control_use ( @ | |
| 1781 const gomp_continue *s) | |
| 0 | 1782 Return the use of the control variable on a @code{GIMPLE_OMP_CONTINUE} |
| 1783 in @code{S}. | |
| 1784 @end deftypefn | |
| 111 | 1785 |
| 1786 @deftypefn {GIMPLE function} tree gimple_omp_continue_control_use_ptr ( @ | |
| 1787 gomp_continue *s) | |
| 0 | 1788 Same as above, but return the pointer. |
| 1789 @end deftypefn | |
| 111 | 1790 |
| 1791 @deftypefn {GIMPLE function} tree gimple_omp_continue_set_control_use ( @ | |
| 1792 gomp_continue *s) | |
| 0 | 1793 Set the control variable use for a @code{GIMPLE_OMP_CONTINUE} statement |
| 1794 in @code{S}. | |
| 1795 @end deftypefn | |
| 1796 | |
| 1797 | |
| 1798 @node @code{GIMPLE_OMP_CRITICAL} | |
| 1799 @subsection @code{GIMPLE_OMP_CRITICAL} | |
| 1800 @cindex @code{GIMPLE_OMP_CRITICAL} | |
| 1801 | |
| 111 | 1802 @deftypefn {GIMPLE function} gomp_critical *gimple_build_omp_critical ( @ |
| 1803 gimple_seq body, tree name) | |
| 0 | 1804 Build a @code{GIMPLE_OMP_CRITICAL} statement. @code{BODY} is the sequence of |
| 1805 statements for which only one thread can execute. @code{NAME} is an | |
| 1806 optional identifier for this critical block. | |
| 1807 @end deftypefn | |
| 1808 | |
| 111 | 1809 @deftypefn {GIMPLE function} tree gimple_omp_critical_name ( @ |
| 1810 const gomp_critical *g) | |
| 1811 Return the name associated with @code{OMP_CRITICAL} statement @code{G}. | |
| 0 | 1812 @end deftypefn |
| 1813 | |
| 111 | 1814 @deftypefn {GIMPLE function} {tree *} gimple_omp_critical_name_ptr ( @ |
| 1815 gomp_critical *g) | |
| 0 | 1816 Return a pointer to the name associated with @code{OMP} critical |
| 111 | 1817 statement @code{G}. |
| 0 | 1818 @end deftypefn |
| 1819 | |
| 111 | 1820 @deftypefn {GIMPLE function} void gimple_omp_critical_set_name ( @ |
| 1821 gomp_critical *g, tree name) | |
| 1822 Set @code{NAME} to be the name associated with @code{OMP} critical statement @code{G}. | |
| 0 | 1823 @end deftypefn |
| 1824 | |
| 1825 @node @code{GIMPLE_OMP_FOR} | |
| 1826 @subsection @code{GIMPLE_OMP_FOR} | |
| 1827 @cindex @code{GIMPLE_OMP_FOR} | |
| 1828 | |
| 111 | 1829 @deftypefn {GIMPLE function} gomp_for *gimple_build_omp_for (gimple_seq body, @ |
| 0 | 1830 tree clauses, tree index, tree initial, tree final, tree incr, @ |
| 1831 gimple_seq pre_body, enum tree_code omp_for_cond) | |
| 1832 Build a @code{GIMPLE_OMP_FOR} statement. @code{BODY} is sequence of statements | |
| 111 | 1833 inside the for loop. @code{CLAUSES}, are any of the loop |
| 1834 construct's clauses. @code{PRE_BODY} is the | |
| 0 | 1835 sequence of statements that are loop invariant. @code{INDEX} is the |
| 1836 index variable. @code{INITIAL} is the initial value of @code{INDEX}. @code{FINAL} is | |
| 1837 final value of @code{INDEX}. OMP_FOR_COND is the predicate used to | |
| 1838 compare @code{INDEX} and @code{FINAL}. @code{INCR} is the increment expression. | |
| 1839 @end deftypefn | |
| 1840 | |
| 1841 @deftypefn {GIMPLE function} tree gimple_omp_for_clauses (gimple g) | |
| 111 | 1842 Return the clauses associated with @code{OMP_FOR} @code{G}. |
| 0 | 1843 @end deftypefn |
| 1844 | |
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1845 @deftypefn {GIMPLE function} {tree *} gimple_omp_for_clauses_ptr (gimple g) |
| 111 | 1846 Return a pointer to the @code{OMP_FOR} @code{G}. |
| 0 | 1847 @end deftypefn |
| 1848 | |
| 1849 @deftypefn {GIMPLE function} void gimple_omp_for_set_clauses (gimple g, tree clauses) | |
| 111 | 1850 Set @code{CLAUSES} to be the list of clauses associated with @code{OMP_FOR} @code{G}. |
| 0 | 1851 @end deftypefn |
| 1852 | |
| 1853 @deftypefn {GIMPLE function} tree gimple_omp_for_index (gimple g) | |
| 111 | 1854 Return the index variable for @code{OMP_FOR} @code{G}. |
| 0 | 1855 @end deftypefn |
| 1856 | |
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1857 @deftypefn {GIMPLE function} {tree *} gimple_omp_for_index_ptr (gimple g) |
| 111 | 1858 Return a pointer to the index variable for @code{OMP_FOR} @code{G}. |
| 0 | 1859 @end deftypefn |
| 1860 | |
| 1861 @deftypefn {GIMPLE function} void gimple_omp_for_set_index (gimple g, tree index) | |
| 111 | 1862 Set @code{INDEX} to be the index variable for @code{OMP_FOR} @code{G}. |
| 0 | 1863 @end deftypefn |
| 1864 | |
| 1865 @deftypefn {GIMPLE function} tree gimple_omp_for_initial (gimple g) | |
| 111 | 1866 Return the initial value for @code{OMP_FOR} @code{G}. |
| 0 | 1867 @end deftypefn |
| 1868 | |
|
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1869 @deftypefn {GIMPLE function} {tree *} gimple_omp_for_initial_ptr (gimple g) |
| 111 | 1870 Return a pointer to the initial value for @code{OMP_FOR} @code{G}. |
| 0 | 1871 @end deftypefn |
| 1872 | |
| 1873 @deftypefn {GIMPLE function} void gimple_omp_for_set_initial (gimple g, tree initial) | |
| 1874 Set @code{INITIAL} to be the initial value for @code{OMP_FOR} @code{G}. | |
| 1875 @end deftypefn | |
| 1876 | |
| 1877 @deftypefn {GIMPLE function} tree gimple_omp_for_final (gimple g) | |
| 111 | 1878 Return the final value for @code{OMP_FOR} @code{G}. |
| 0 | 1879 @end deftypefn |
| 1880 | |
|
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1881 @deftypefn {GIMPLE function} {tree *} gimple_omp_for_final_ptr (gimple g) |
| 111 | 1882 turn a pointer to the final value for @code{OMP_FOR} @code{G}. |
| 0 | 1883 @end deftypefn |
| 1884 | |
| 1885 @deftypefn {GIMPLE function} void gimple_omp_for_set_final (gimple g, tree final) | |
| 111 | 1886 Set @code{FINAL} to be the final value for @code{OMP_FOR} @code{G}. |
| 0 | 1887 @end deftypefn |
| 1888 | |
| 1889 @deftypefn {GIMPLE function} tree gimple_omp_for_incr (gimple g) | |
| 111 | 1890 Return the increment value for @code{OMP_FOR} @code{G}. |
| 0 | 1891 @end deftypefn |
| 1892 | |
|
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1893 @deftypefn {GIMPLE function} {tree *} gimple_omp_for_incr_ptr (gimple g) |
| 111 | 1894 Return a pointer to the increment value for @code{OMP_FOR} @code{G}. |
| 0 | 1895 @end deftypefn |
| 1896 | |
| 1897 @deftypefn {GIMPLE function} void gimple_omp_for_set_incr (gimple g, tree incr) | |
| 111 | 1898 Set @code{INCR} to be the increment value for @code{OMP_FOR} @code{G}. |
| 0 | 1899 @end deftypefn |
| 1900 | |
| 1901 @deftypefn {GIMPLE function} gimple_seq gimple_omp_for_pre_body (gimple g) | |
| 1902 Return the sequence of statements to execute before the @code{OMP_FOR} | |
| 111 | 1903 statement @code{G} starts. |
| 0 | 1904 @end deftypefn |
| 1905 | |
| 1906 @deftypefn {GIMPLE function} void gimple_omp_for_set_pre_body (gimple g, gimple_seq pre_body) | |
| 1907 Set @code{PRE_BODY} to be the sequence of statements to execute before | |
| 1908 the @code{OMP_FOR} statement @code{G} starts. | |
| 1909 @end deftypefn | |
| 111 | 1910 |
| 0 | 1911 @deftypefn {GIMPLE function} void gimple_omp_for_set_cond (gimple g, enum tree_code cond) |
| 111 | 1912 Set @code{COND} to be the condition code for @code{OMP_FOR} @code{G}. |
| 0 | 1913 @end deftypefn |
| 1914 | |
|
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1915 @deftypefn {GIMPLE function} {enum tree_code} gimple_omp_for_cond (gimple g) |
| 111 | 1916 Return the condition code associated with @code{OMP_FOR} @code{G}. |
| 0 | 1917 @end deftypefn |
| 1918 | |
| 1919 | |
| 1920 @node @code{GIMPLE_OMP_MASTER} | |
| 1921 @subsection @code{GIMPLE_OMP_MASTER} | |
| 1922 @cindex @code{GIMPLE_OMP_MASTER} | |
| 1923 | |
| 1924 @deftypefn {GIMPLE function} gimple gimple_build_omp_master (gimple_seq body) | |
| 1925 Build a @code{GIMPLE_OMP_MASTER} statement. @code{BODY} is the sequence of | |
| 1926 statements to be executed by just the master. | |
| 1927 @end deftypefn | |
| 1928 | |
| 1929 | |
| 1930 @node @code{GIMPLE_OMP_ORDERED} | |
| 1931 @subsection @code{GIMPLE_OMP_ORDERED} | |
| 1932 @cindex @code{GIMPLE_OMP_ORDERED} | |
| 1933 | |
| 1934 @deftypefn {GIMPLE function} gimple gimple_build_omp_ordered (gimple_seq body) | |
| 1935 Build a @code{GIMPLE_OMP_ORDERED} statement. | |
| 1936 @end deftypefn | |
| 1937 | |
| 1938 @code{BODY} is the sequence of statements inside a loop that will | |
| 1939 executed in sequence. | |
| 1940 | |
| 1941 | |
| 1942 @node @code{GIMPLE_OMP_PARALLEL} | |
| 1943 @subsection @code{GIMPLE_OMP_PARALLEL} | |
| 1944 @cindex @code{GIMPLE_OMP_PARALLEL} | |
| 1945 | |
| 111 | 1946 @deftypefn {GIMPLE function} gomp_parallel *gimple_build_omp_parallel (@ |
| 1947 gimple_seq body, tree clauses, tree child_fn, tree data_arg) | |
| 0 | 1948 Build a @code{GIMPLE_OMP_PARALLEL} statement. |
| 1949 @end deftypefn | |
| 1950 | |
| 1951 @code{BODY} is sequence of statements which are executed in parallel. | |
| 1952 @code{CLAUSES}, are the @code{OMP} parallel construct's clauses. @code{CHILD_FN} is | |
| 1953 the function created for the parallel threads to execute. | |
| 1954 @code{DATA_ARG} are the shared data argument(s). | |
| 1955 | |
| 1956 @deftypefn {GIMPLE function} bool gimple_omp_parallel_combined_p (gimple g) | |
| 1957 Return true if @code{OMP} parallel statement @code{G} has the | |
| 1958 @code{GF_OMP_PARALLEL_COMBINED} flag set. | |
| 1959 @end deftypefn | |
| 111 | 1960 |
| 0 | 1961 @deftypefn {GIMPLE function} void gimple_omp_parallel_set_combined_p (gimple g) |
| 1962 Set the @code{GF_OMP_PARALLEL_COMBINED} field in @code{OMP} parallel statement | |
| 1963 @code{G}. | |
| 1964 @end deftypefn | |
| 111 | 1965 |
| 0 | 1966 @deftypefn {GIMPLE function} gimple_seq gimple_omp_body (gimple g) |
| 111 | 1967 Return the body for the @code{OMP} statement @code{G}. |
| 0 | 1968 @end deftypefn |
| 1969 | |
| 1970 @deftypefn {GIMPLE function} void gimple_omp_set_body (gimple g, gimple_seq body) | |
| 111 | 1971 Set @code{BODY} to be the body for the @code{OMP} statement @code{G}. |
| 0 | 1972 @end deftypefn |
| 1973 | |
| 1974 @deftypefn {GIMPLE function} tree gimple_omp_parallel_clauses (gimple g) | |
| 111 | 1975 Return the clauses associated with @code{OMP_PARALLEL} @code{G}. |
| 0 | 1976 @end deftypefn |
| 1977 | |
| 111 | 1978 @deftypefn {GIMPLE function} {tree *} gimple_omp_parallel_clauses_ptr ( @ |
| 1979 gomp_parallel *g) | |
| 1980 Return a pointer to the clauses associated with @code{OMP_PARALLEL} @code{G}. | |
| 0 | 1981 @end deftypefn |
| 1982 | |
| 111 | 1983 @deftypefn {GIMPLE function} void gimple_omp_parallel_set_clauses ( @ |
| 1984 gomp_parallel *g, tree clauses) | |
| 0 | 1985 Set @code{CLAUSES} to be the list of clauses associated with |
| 111 | 1986 @code{OMP_PARALLEL} @code{G}. |
| 0 | 1987 @end deftypefn |
| 1988 | |
| 111 | 1989 @deftypefn {GIMPLE function} tree gimple_omp_parallel_child_fn ( @ |
| 1990 const gomp_parallel *g) | |
| 0 | 1991 Return the child function used to hold the body of @code{OMP_PARALLEL} |
| 111 | 1992 @code{G}. |
| 0 | 1993 @end deftypefn |
| 1994 | |
| 111 | 1995 @deftypefn {GIMPLE function} {tree *} gimple_omp_parallel_child_fn_ptr ( @ |
| 1996 gomp_parallel *g) | |
| 1997 Return a pointer to the child function used to hold the body of | |
| 1998 @code{OMP_PARALLEL} @code{G}. | |
| 0 | 1999 @end deftypefn |
| 2000 | |
| 111 | 2001 @deftypefn {GIMPLE function} void gimple_omp_parallel_set_child_fn ( @ |
| 2002 gomp_parallel *g, tree child_fn) | |
| 2003 Set @code{CHILD_FN} to be the child function for @code{OMP_PARALLEL} @code{G}. | |
| 0 | 2004 @end deftypefn |
| 2005 | |
| 111 | 2006 @deftypefn {GIMPLE function} tree gimple_omp_parallel_data_arg ( @ |
| 2007 const gomp_parallel *g) | |
| 2008 Return the artificial argument used to send variables and values | |
| 2009 from the parent to the children threads in @code{OMP_PARALLEL} @code{G}. | |
| 0 | 2010 @end deftypefn |
| 2011 | |
| 111 | 2012 @deftypefn {GIMPLE function} {tree *} gimple_omp_parallel_data_arg_ptr ( @ |
| 2013 gomp_parallel *g) | |
| 2014 Return a pointer to the data argument for @code{OMP_PARALLEL} @code{G}. | |
| 0 | 2015 @end deftypefn |
| 2016 | |
| 111 | 2017 @deftypefn {GIMPLE function} void gimple_omp_parallel_set_data_arg ( @ |
| 2018 gomp_parallel *g, tree data_arg) | |
| 2019 Set @code{DATA_ARG} to be the data argument for @code{OMP_PARALLEL} @code{G}. | |
| 0 | 2020 @end deftypefn |
| 2021 | |
| 2022 | |
| 2023 @node @code{GIMPLE_OMP_RETURN} | |
| 2024 @subsection @code{GIMPLE_OMP_RETURN} | |
| 2025 @cindex @code{GIMPLE_OMP_RETURN} | |
| 2026 | |
| 2027 @deftypefn {GIMPLE function} gimple gimple_build_omp_return (bool wait_p) | |
| 2028 Build a @code{GIMPLE_OMP_RETURN} statement. @code{WAIT_P} is true if this is a | |
| 2029 non-waiting return. | |
| 2030 @end deftypefn | |
| 2031 | |
| 2032 @deftypefn {GIMPLE function} void gimple_omp_return_set_nowait (gimple s) | |
| 2033 Set the nowait flag on @code{GIMPLE_OMP_RETURN} statement @code{S}. | |
| 2034 @end deftypefn | |
| 111 | 2035 |
| 0 | 2036 |
| 2037 @deftypefn {GIMPLE function} bool gimple_omp_return_nowait_p (gimple g) | |
| 2038 Return true if @code{OMP} return statement @code{G} has the | |
| 2039 @code{GF_OMP_RETURN_NOWAIT} flag set. | |
| 2040 @end deftypefn | |
| 2041 | |
| 2042 @node @code{GIMPLE_OMP_SECTION} | |
| 2043 @subsection @code{GIMPLE_OMP_SECTION} | |
| 2044 @cindex @code{GIMPLE_OMP_SECTION} | |
| 2045 | |
| 2046 @deftypefn {GIMPLE function} gimple gimple_build_omp_section (gimple_seq body) | |
| 2047 Build a @code{GIMPLE_OMP_SECTION} statement for a sections statement. | |
| 2048 @end deftypefn | |
| 2049 | |
| 2050 @code{BODY} is the sequence of statements in the section. | |
| 2051 | |
| 2052 @deftypefn {GIMPLE function} bool gimple_omp_section_last_p (gimple g) | |
| 2053 Return true if @code{OMP} section statement @code{G} has the | |
| 2054 @code{GF_OMP_SECTION_LAST} flag set. | |
| 2055 @end deftypefn | |
| 111 | 2056 |
| 0 | 2057 @deftypefn {GIMPLE function} void gimple_omp_section_set_last (gimple g) |
| 2058 Set the @code{GF_OMP_SECTION_LAST} flag on @code{G}. | |
| 2059 @end deftypefn | |
| 2060 | |
| 2061 @node @code{GIMPLE_OMP_SECTIONS} | |
| 2062 @subsection @code{GIMPLE_OMP_SECTIONS} | |
| 2063 @cindex @code{GIMPLE_OMP_SECTIONS} | |
| 2064 | |
| 111 | 2065 @deftypefn {GIMPLE function} gomp_sections *gimple_build_omp_sections ( @ |
| 2066 gimple_seq body, tree clauses) | |
| 0 | 2067 Build a @code{GIMPLE_OMP_SECTIONS} statement. @code{BODY} is a sequence of |
| 2068 section statements. @code{CLAUSES} are any of the @code{OMP} sections | |
| 2069 construct's clauses: private, firstprivate, lastprivate, | |
| 2070 reduction, and nowait. | |
| 2071 @end deftypefn | |
| 2072 | |
| 2073 | |
| 2074 @deftypefn {GIMPLE function} gimple gimple_build_omp_sections_switch (void) | |
| 2075 Build a @code{GIMPLE_OMP_SECTIONS_SWITCH} statement. | |
| 2076 @end deftypefn | |
| 2077 | |
| 2078 @deftypefn {GIMPLE function} tree gimple_omp_sections_control (gimple g) | |
| 2079 Return the control variable associated with the | |
| 2080 @code{GIMPLE_OMP_SECTIONS} in @code{G}. | |
| 2081 @end deftypefn | |
| 111 | 2082 |
|
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2083 @deftypefn {GIMPLE function} {tree *} gimple_omp_sections_control_ptr (gimple g) |
| 0 | 2084 Return a pointer to the clauses associated with the |
| 2085 @code{GIMPLE_OMP_SECTIONS} in @code{G}. | |
| 2086 @end deftypefn | |
| 111 | 2087 |
| 0 | 2088 @deftypefn {GIMPLE function} void gimple_omp_sections_set_control (gimple g, tree control) |
| 2089 Set @code{CONTROL} to be the set of clauses associated with the | |
| 2090 @code{GIMPLE_OMP_SECTIONS} in @code{G}. | |
| 2091 @end deftypefn | |
| 111 | 2092 |
| 0 | 2093 @deftypefn {GIMPLE function} tree gimple_omp_sections_clauses (gimple g) |
| 111 | 2094 Return the clauses associated with @code{OMP_SECTIONS} @code{G}. |
| 0 | 2095 @end deftypefn |
| 2096 | |
|
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2097 @deftypefn {GIMPLE function} {tree *} gimple_omp_sections_clauses_ptr (gimple g) |
| 111 | 2098 Return a pointer to the clauses associated with @code{OMP_SECTIONS} @code{G}. |
| 0 | 2099 @end deftypefn |
| 2100 | |
| 2101 @deftypefn {GIMPLE function} void gimple_omp_sections_set_clauses (gimple g, tree clauses) | |
| 2102 Set @code{CLAUSES} to be the set of clauses associated with @code{OMP_SECTIONS} | |
| 111 | 2103 @code{G}. |
| 0 | 2104 @end deftypefn |
| 2105 | |
| 2106 | |
| 2107 @node @code{GIMPLE_OMP_SINGLE} | |
| 2108 @subsection @code{GIMPLE_OMP_SINGLE} | |
| 2109 @cindex @code{GIMPLE_OMP_SINGLE} | |
| 2110 | |
| 111 | 2111 @deftypefn {GIMPLE function} gomp_single *gimple_build_omp_single ( @ |
| 2112 gimple_seq body, tree clauses) | |
| 0 | 2113 Build a @code{GIMPLE_OMP_SINGLE} statement. @code{BODY} is the sequence of |
| 2114 statements that will be executed once. @code{CLAUSES} are any of the | |
| 2115 @code{OMP} single construct's clauses: private, firstprivate, | |
| 2116 copyprivate, nowait. | |
| 2117 @end deftypefn | |
| 2118 | |
| 2119 @deftypefn {GIMPLE function} tree gimple_omp_single_clauses (gimple g) | |
| 111 | 2120 Return the clauses associated with @code{OMP_SINGLE} @code{G}. |
| 0 | 2121 @end deftypefn |
| 2122 | |
|
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2123 @deftypefn {GIMPLE function} {tree *} gimple_omp_single_clauses_ptr (gimple g) |
| 111 | 2124 Return a pointer to the clauses associated with @code{OMP_SINGLE} @code{G}. |
| 0 | 2125 @end deftypefn |
| 2126 | |
| 111 | 2127 @deftypefn {GIMPLE function} void gimple_omp_single_set_clauses ( @ |
| 2128 gomp_single *g, tree clauses) | |
| 2129 Set @code{CLAUSES} to be the clauses associated with @code{OMP_SINGLE} @code{G}. | |
| 0 | 2130 @end deftypefn |
| 2131 | |
| 2132 | |
| 2133 @node @code{GIMPLE_PHI} | |
| 2134 @subsection @code{GIMPLE_PHI} | |
| 2135 @cindex @code{GIMPLE_PHI} | |
| 2136 | |
| 2137 @deftypefn {GIMPLE function} unsigned gimple_phi_capacity (gimple g) | |
| 111 | 2138 Return the maximum number of arguments supported by @code{GIMPLE_PHI} @code{G}. |
| 0 | 2139 @end deftypefn |
| 2140 | |
| 2141 @deftypefn {GIMPLE function} unsigned gimple_phi_num_args (gimple g) | |
| 2142 Return the number of arguments in @code{GIMPLE_PHI} @code{G}. This must always | |
| 2143 be exactly the number of incoming edges for the basic block | |
| 111 | 2144 holding @code{G}. |
| 0 | 2145 @end deftypefn |
| 2146 | |
| 2147 @deftypefn {GIMPLE function} tree gimple_phi_result (gimple g) | |
| 111 | 2148 Return the @code{SSA} name created by @code{GIMPLE_PHI} @code{G}. |
| 0 | 2149 @end deftypefn |
| 2150 | |
|
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2151 @deftypefn {GIMPLE function} {tree *} gimple_phi_result_ptr (gimple g) |
| 111 | 2152 Return a pointer to the @code{SSA} name created by @code{GIMPLE_PHI} @code{G}. |
| 0 | 2153 @end deftypefn |
| 2154 | |
| 111 | 2155 @deftypefn {GIMPLE function} void gimple_phi_set_result (gphi *g, tree result) |
| 2156 Set @code{RESULT} to be the @code{SSA} name created by @code{GIMPLE_PHI} @code{G}. | |
| 0 | 2157 @end deftypefn |
| 2158 | |
|
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2159 @deftypefn {GIMPLE function} {struct phi_arg_d *} gimple_phi_arg (gimple g, index) |
| 0 | 2160 Return the @code{PHI} argument corresponding to incoming edge @code{INDEX} for |
| 111 | 2161 @code{GIMPLE_PHI} @code{G}. |
| 0 | 2162 @end deftypefn |
| 2163 | |
| 111 | 2164 @deftypefn {GIMPLE function} void gimple_phi_set_arg (gphi *g, index, @ |
| 2165 struct phi_arg_d * phiarg) | |
| 0 | 2166 Set @code{PHIARG} to be the argument corresponding to incoming edge |
| 111 | 2167 @code{INDEX} for @code{GIMPLE_PHI} @code{G}. |
| 0 | 2168 @end deftypefn |
| 2169 | |
| 2170 @node @code{GIMPLE_RESX} | |
| 2171 @subsection @code{GIMPLE_RESX} | |
| 2172 @cindex @code{GIMPLE_RESX} | |
| 2173 | |
| 111 | 2174 @deftypefn {GIMPLE function} gresx *gimple_build_resx (int region) |
| 0 | 2175 Build a @code{GIMPLE_RESX} statement which is a statement. This |
| 2176 statement is a placeholder for _Unwind_Resume before we know if a | |
| 2177 function call or a branch is needed. @code{REGION} is the exception | |
| 2178 region from which control is flowing. | |
| 2179 @end deftypefn | |
| 2180 | |
| 111 | 2181 @deftypefn {GIMPLE function} int gimple_resx_region (const gresx *g) |
| 2182 Return the region number for @code{GIMPLE_RESX} @code{G}. | |
| 0 | 2183 @end deftypefn |
| 2184 | |
| 111 | 2185 @deftypefn {GIMPLE function} void gimple_resx_set_region (gresx *g, int region) |
| 2186 Set @code{REGION} to be the region number for @code{GIMPLE_RESX} @code{G}. | |
| 0 | 2187 @end deftypefn |
| 2188 | |
| 2189 @node @code{GIMPLE_RETURN} | |
| 2190 @subsection @code{GIMPLE_RETURN} | |
| 2191 @cindex @code{GIMPLE_RETURN} | |
| 2192 | |
| 111 | 2193 @deftypefn {GIMPLE function} greturn *gimple_build_return (tree retval) |
| 0 | 2194 Build a @code{GIMPLE_RETURN} statement whose return value is retval. |
| 2195 @end deftypefn | |
| 2196 | |
| 111 | 2197 @deftypefn {GIMPLE function} tree gimple_return_retval (const greturn *g) |
| 2198 Return the return value for @code{GIMPLE_RETURN} @code{G}. | |
| 0 | 2199 @end deftypefn |
| 2200 | |
| 111 | 2201 @deftypefn {GIMPLE function} void gimple_return_set_retval (greturn *g, @ |
| 2202 tree retval) | |
| 2203 Set @code{RETVAL} to be the return value for @code{GIMPLE_RETURN} @code{G}. | |
| 0 | 2204 @end deftypefn |
| 2205 | |
| 2206 @node @code{GIMPLE_SWITCH} | |
| 2207 @subsection @code{GIMPLE_SWITCH} | |
| 2208 @cindex @code{GIMPLE_SWITCH} | |
| 2209 | |
| 111 | 2210 @deftypefn {GIMPLE function} gswitch *gimple_build_switch (tree index, @ |
| 2211 tree default_label, @code{vec}<tree> *args) | |
| 2212 Build a @code{GIMPLE_SWITCH} statement. @code{INDEX} is the index variable | |
| 2213 to switch on, and @code{DEFAULT_LABEL} represents the default label. | |
| 2214 @code{ARGS} is a vector of @code{CASE_LABEL_EXPR} trees that contain the | |
| 2215 non-default case labels. Each label is a tree of code @code{CASE_LABEL_EXPR}. | |
| 0 | 2216 @end deftypefn |
| 2217 | |
| 111 | 2218 @deftypefn {GIMPLE function} unsigned gimple_switch_num_labels ( @ |
| 2219 const gswitch *g) | |
| 2220 Return the number of labels associated with the switch statement | |
| 2221 @code{G}. | |
| 0 | 2222 @end deftypefn |
| 2223 | |
| 111 | 2224 @deftypefn {GIMPLE function} void gimple_switch_set_num_labels (gswitch *g, @ |
|
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2225 unsigned nlabels) |
| 0 | 2226 Set @code{NLABELS} to be the number of labels for the switch statement |
| 111 | 2227 @code{G}. |
| 0 | 2228 @end deftypefn |
| 2229 | |
| 111 | 2230 @deftypefn {GIMPLE function} tree gimple_switch_index (const gswitch *g) |
| 2231 Return the index variable used by the switch statement @code{G}. | |
| 0 | 2232 @end deftypefn |
| 2233 | |
| 111 | 2234 @deftypefn {GIMPLE function} void gimple_switch_set_index (gswitch *g, @ |
| 2235 tree index) | |
| 2236 Set @code{INDEX} to be the index variable for switch statement @code{G}. | |
| 0 | 2237 @end deftypefn |
| 2238 | |
| 111 | 2239 @deftypefn {GIMPLE function} tree gimple_switch_label (const gswitch *g, @ |
| 2240 unsigned index) | |
| 2241 Return the label numbered @code{INDEX}. The default label is 0, followed | |
| 2242 by any labels in a switch statement. | |
| 0 | 2243 @end deftypefn |
| 2244 | |
| 111 | 2245 @deftypefn {GIMPLE function} void gimple_switch_set_label (gswitch *g, @ |
| 2246 unsigned index, tree label) | |
| 2247 Set the label number @code{INDEX} to @code{LABEL}. 0 is always the default | |
| 2248 label. | |
| 0 | 2249 @end deftypefn |
| 2250 | |
| 111 | 2251 @deftypefn {GIMPLE function} tree gimple_switch_default_label ( @ |
| 2252 const gswitch *g) | |
| 2253 Return the default label for a switch statement. | |
| 2254 @end deftypefn | |
| 2255 | |
| 2256 @deftypefn {GIMPLE function} void gimple_switch_set_default_label (gswitch *g, @ | |
|
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2257 tree label) |
| 111 | 2258 Set the default label for a switch statement. |
| 0 | 2259 @end deftypefn |
| 2260 | |
| 2261 | |
| 2262 @node @code{GIMPLE_TRY} | |
| 2263 @subsection @code{GIMPLE_TRY} | |
| 2264 @cindex @code{GIMPLE_TRY} | |
| 2265 | |
| 111 | 2266 @deftypefn {GIMPLE function} gtry *gimple_build_try (gimple_seq eval, @ |
|
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2267 gimple_seq cleanup, unsigned int kind) |
| 0 | 2268 Build a @code{GIMPLE_TRY} statement. @code{EVAL} is a sequence with the |
| 2269 expression to evaluate. @code{CLEANUP} is a sequence of statements to | |
| 2270 run at clean-up time. @code{KIND} is the enumeration value | |
| 2271 @code{GIMPLE_TRY_CATCH} if this statement denotes a try/catch construct | |
| 2272 or @code{GIMPLE_TRY_FINALLY} if this statement denotes a try/finally | |
| 2273 construct. | |
| 2274 @end deftypefn | |
| 2275 | |
|
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2276 @deftypefn {GIMPLE function} {enum gimple_try_flags} gimple_try_kind (gimple g) |
| 0 | 2277 Return the kind of try block represented by @code{GIMPLE_TRY} @code{G}. This is |
| 111 | 2278 either @code{GIMPLE_TRY_CATCH} or @code{GIMPLE_TRY_FINALLY}. |
| 0 | 2279 @end deftypefn |
| 2280 | |
| 2281 @deftypefn {GIMPLE function} bool gimple_try_catch_is_cleanup (gimple g) | |
| 111 | 2282 Return the @code{GIMPLE_TRY_CATCH_IS_CLEANUP} flag. |
| 0 | 2283 @end deftypefn |
| 2284 | |
| 2285 @deftypefn {GIMPLE function} gimple_seq gimple_try_eval (gimple g) | |
| 2286 Return the sequence of statements used as the body for @code{GIMPLE_TRY} | |
| 111 | 2287 @code{G}. |
| 0 | 2288 @end deftypefn |
| 2289 | |
| 2290 @deftypefn {GIMPLE function} gimple_seq gimple_try_cleanup (gimple g) | |
| 2291 Return the sequence of statements used as the cleanup body for | |
| 111 | 2292 @code{GIMPLE_TRY} @code{G}. |
| 0 | 2293 @end deftypefn |
| 2294 | |
|
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2295 @deftypefn {GIMPLE function} void gimple_try_set_catch_is_cleanup (gimple g, @ |
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2296 bool catch_is_cleanup) |
| 111 | 2297 Set the @code{GIMPLE_TRY_CATCH_IS_CLEANUP} flag. |
| 0 | 2298 @end deftypefn |
| 2299 | |
| 111 | 2300 @deftypefn {GIMPLE function} void gimple_try_set_eval (gtry *g, gimple_seq eval) |
| 0 | 2301 Set @code{EVAL} to be the sequence of statements to use as the body for |
| 111 | 2302 @code{GIMPLE_TRY} @code{G}. |
| 0 | 2303 @end deftypefn |
| 2304 | |
| 111 | 2305 @deftypefn {GIMPLE function} void gimple_try_set_cleanup (gtry *g, @ |
| 2306 gimple_seq cleanup) | |
| 0 | 2307 Set @code{CLEANUP} to be the sequence of statements to use as the |
| 111 | 2308 cleanup body for @code{GIMPLE_TRY} @code{G}. |
| 0 | 2309 @end deftypefn |
| 2310 | |
| 2311 @node @code{GIMPLE_WITH_CLEANUP_EXPR} | |
| 2312 @subsection @code{GIMPLE_WITH_CLEANUP_EXPR} | |
| 2313 @cindex @code{GIMPLE_WITH_CLEANUP_EXPR} | |
| 2314 | |
| 2315 @deftypefn {GIMPLE function} gimple gimple_build_wce (gimple_seq cleanup) | |
| 2316 Build a @code{GIMPLE_WITH_CLEANUP_EXPR} statement. @code{CLEANUP} is the | |
| 2317 clean-up expression. | |
| 2318 @end deftypefn | |
| 2319 | |
| 2320 @deftypefn {GIMPLE function} gimple_seq gimple_wce_cleanup (gimple g) | |
| 111 | 2321 Return the cleanup sequence for cleanup statement @code{G}. |
| 0 | 2322 @end deftypefn |
| 2323 | |
| 2324 @deftypefn {GIMPLE function} void gimple_wce_set_cleanup (gimple g, gimple_seq cleanup) | |
| 111 | 2325 Set @code{CLEANUP} to be the cleanup sequence for @code{G}. |
| 0 | 2326 @end deftypefn |
| 2327 | |
| 2328 @deftypefn {GIMPLE function} bool gimple_wce_cleanup_eh_only (gimple g) | |
| 111 | 2329 Return the @code{CLEANUP_EH_ONLY} flag for a @code{WCE} tuple. |
| 0 | 2330 @end deftypefn |
| 2331 | |
| 2332 @deftypefn {GIMPLE function} void gimple_wce_set_cleanup_eh_only (gimple g, bool eh_only_p) | |
| 111 | 2333 Set the @code{CLEANUP_EH_ONLY} flag for a @code{WCE} tuple. |
| 0 | 2334 @end deftypefn |
| 2335 | |
| 2336 | |
| 111 | 2337 @node GIMPLE sequences |
| 2338 @section GIMPLE sequences | |
| 2339 @cindex GIMPLE sequences | |
| 0 | 2340 |
| 2341 GIMPLE sequences are the tuple equivalent of @code{STATEMENT_LIST}'s | |
| 2342 used in @code{GENERIC}. They are used to chain statements together, and | |
| 2343 when used in conjunction with sequence iterators, provide a | |
| 2344 framework for iterating through statements. | |
| 2345 | |
| 2346 GIMPLE sequences are of type struct @code{gimple_sequence}, but are more | |
| 2347 commonly passed by reference to functions dealing with sequences. | |
| 2348 The type for a sequence pointer is @code{gimple_seq} which is the same | |
| 2349 as struct @code{gimple_sequence} *. When declaring a local sequence, | |
| 2350 you can define a local variable of type struct @code{gimple_sequence}. | |
| 2351 When declaring a sequence allocated on the garbage collected | |
| 2352 heap, use the function @code{gimple_seq_alloc} documented below. | |
| 2353 | |
| 2354 There are convenience functions for iterating through sequences | |
| 2355 in the section entitled Sequence Iterators. | |
| 2356 | |
| 2357 Below is a list of functions to manipulate and query sequences. | |
| 2358 | |
| 2359 @deftypefn {GIMPLE function} void gimple_seq_add_stmt (gimple_seq *seq, gimple g) | |
| 2360 Link a gimple statement to the end of the sequence *@code{SEQ} if @code{G} is | |
| 2361 not @code{NULL}. If *@code{SEQ} is @code{NULL}, allocate a sequence before linking. | |
| 2362 @end deftypefn | |
| 2363 | |
| 2364 @deftypefn {GIMPLE function} void gimple_seq_add_seq (gimple_seq *dest, gimple_seq src) | |
| 2365 Append sequence @code{SRC} to the end of sequence *@code{DEST} if @code{SRC} is not | |
| 2366 @code{NULL}. If *@code{DEST} is @code{NULL}, allocate a new sequence before | |
| 2367 appending. | |
| 2368 @end deftypefn | |
| 2369 | |
| 2370 @deftypefn {GIMPLE function} gimple_seq gimple_seq_deep_copy (gimple_seq src) | |
| 2371 Perform a deep copy of sequence @code{SRC} and return the result. | |
| 2372 @end deftypefn | |
| 2373 | |
| 2374 @deftypefn {GIMPLE function} gimple_seq gimple_seq_reverse (gimple_seq seq) | |
| 2375 Reverse the order of the statements in the sequence @code{SEQ}. Return | |
| 2376 @code{SEQ}. | |
| 2377 @end deftypefn | |
| 2378 | |
| 2379 @deftypefn {GIMPLE function} gimple gimple_seq_first (gimple_seq s) | |
| 2380 Return the first statement in sequence @code{S}. | |
| 2381 @end deftypefn | |
| 2382 | |
| 2383 @deftypefn {GIMPLE function} gimple gimple_seq_last (gimple_seq s) | |
| 2384 Return the last statement in sequence @code{S}. | |
| 2385 @end deftypefn | |
| 2386 | |
| 2387 @deftypefn {GIMPLE function} void gimple_seq_set_last (gimple_seq s, gimple last) | |
| 2388 Set the last statement in sequence @code{S} to the statement in @code{LAST}. | |
| 2389 @end deftypefn | |
| 2390 | |
| 2391 @deftypefn {GIMPLE function} void gimple_seq_set_first (gimple_seq s, gimple first) | |
| 2392 Set the first statement in sequence @code{S} to the statement in @code{FIRST}. | |
| 2393 @end deftypefn | |
| 2394 | |
| 2395 @deftypefn {GIMPLE function} void gimple_seq_init (gimple_seq s) | |
| 2396 Initialize sequence @code{S} to an empty sequence. | |
| 2397 @end deftypefn | |
| 2398 | |
| 2399 @deftypefn {GIMPLE function} gimple_seq gimple_seq_alloc (void) | |
| 2400 Allocate a new sequence in the garbage collected store and return | |
| 2401 it. | |
| 2402 @end deftypefn | |
| 2403 | |
| 2404 @deftypefn {GIMPLE function} void gimple_seq_copy (gimple_seq dest, gimple_seq src) | |
| 2405 Copy the sequence @code{SRC} into the sequence @code{DEST}. | |
| 2406 @end deftypefn | |
| 2407 | |
| 2408 @deftypefn {GIMPLE function} bool gimple_seq_empty_p (gimple_seq s) | |
| 2409 Return true if the sequence @code{S} is empty. | |
| 2410 @end deftypefn | |
| 2411 | |
| 2412 @deftypefn {GIMPLE function} gimple_seq bb_seq (basic_block bb) | |
| 2413 Returns the sequence of statements in @code{BB}. | |
| 2414 @end deftypefn | |
| 2415 | |
| 2416 @deftypefn {GIMPLE function} void set_bb_seq (basic_block bb, gimple_seq seq) | |
| 2417 Sets the sequence of statements in @code{BB} to @code{SEQ}. | |
| 2418 @end deftypefn | |
| 2419 | |
| 2420 @deftypefn {GIMPLE function} bool gimple_seq_singleton_p (gimple_seq seq) | |
| 2421 Determine whether @code{SEQ} contains exactly one statement. | |
| 2422 @end deftypefn | |
| 2423 | |
| 111 | 2424 @node Sequence iterators |
| 2425 @section Sequence iterators | |
| 2426 @cindex Sequence iterators | |
| 0 | 2427 |
| 2428 Sequence iterators are convenience constructs for iterating | |
| 2429 through statements in a sequence. Given a sequence @code{SEQ}, here is | |
| 2430 a typical use of gimple sequence iterators: | |
| 2431 | |
| 2432 @smallexample | |
| 2433 gimple_stmt_iterator gsi; | |
| 2434 | |
| 2435 for (gsi = gsi_start (seq); !gsi_end_p (gsi); gsi_next (&gsi)) | |
| 2436 @{ | |
| 2437 gimple g = gsi_stmt (gsi); | |
| 2438 /* Do something with gimple statement @code{G}. */ | |
| 2439 @} | |
| 2440 @end smallexample | |
| 2441 | |
| 2442 Backward iterations are possible: | |
| 2443 | |
| 2444 @smallexample | |
| 2445 for (gsi = gsi_last (seq); !gsi_end_p (gsi); gsi_prev (&gsi)) | |
| 2446 @end smallexample | |
| 2447 | |
| 2448 Forward and backward iterations on basic blocks are possible with | |
| 2449 @code{gsi_start_bb} and @code{gsi_last_bb}. | |
| 2450 | |
| 2451 In the documentation below we sometimes refer to enum | |
| 2452 @code{gsi_iterator_update}. The valid options for this enumeration are: | |
| 2453 | |
| 2454 @itemize @bullet | |
| 2455 @item @code{GSI_NEW_STMT} | |
| 2456 Only valid when a single statement is added. Move the iterator to it. | |
| 2457 | |
| 2458 @item @code{GSI_SAME_STMT} | |
| 2459 Leave the iterator at the same statement. | |
| 2460 | |
| 2461 @item @code{GSI_CONTINUE_LINKING} | |
| 2462 Move iterator to whatever position is suitable for linking other | |
| 2463 statements in the same direction. | |
| 2464 @end itemize | |
| 2465 | |
| 2466 Below is a list of the functions used to manipulate and use | |
| 2467 statement iterators. | |
| 2468 | |
| 2469 @deftypefn {GIMPLE function} gimple_stmt_iterator gsi_start (gimple_seq seq) | |
| 2470 Return a new iterator pointing to the sequence @code{SEQ}'s first | |
| 2471 statement. If @code{SEQ} is empty, the iterator's basic block is @code{NULL}. | |
| 2472 Use @code{gsi_start_bb} instead when the iterator needs to always have | |
| 2473 the correct basic block set. | |
| 2474 @end deftypefn | |
| 2475 | |
| 2476 @deftypefn {GIMPLE function} gimple_stmt_iterator gsi_start_bb (basic_block bb) | |
| 2477 Return a new iterator pointing to the first statement in basic | |
| 2478 block @code{BB}. | |
| 2479 @end deftypefn | |
| 2480 | |
| 2481 @deftypefn {GIMPLE function} gimple_stmt_iterator gsi_last (gimple_seq seq) | |
| 2482 Return a new iterator initially pointing to the last statement of | |
| 2483 sequence @code{SEQ}. If @code{SEQ} is empty, the iterator's basic block is | |
| 2484 @code{NULL}. Use @code{gsi_last_bb} instead when the iterator needs to always | |
| 2485 have the correct basic block set. | |
| 2486 @end deftypefn | |
| 2487 | |
| 2488 @deftypefn {GIMPLE function} gimple_stmt_iterator gsi_last_bb (basic_block bb) | |
| 2489 Return a new iterator pointing to the last statement in basic | |
| 2490 block @code{BB}. | |
| 2491 @end deftypefn | |
| 2492 | |
| 2493 @deftypefn {GIMPLE function} bool gsi_end_p (gimple_stmt_iterator i) | |
| 2494 Return @code{TRUE} if at the end of @code{I}. | |
| 2495 @end deftypefn | |
| 2496 | |
| 2497 @deftypefn {GIMPLE function} bool gsi_one_before_end_p (gimple_stmt_iterator i) | |
| 2498 Return @code{TRUE} if we're one statement before the end of @code{I}. | |
| 2499 @end deftypefn | |
| 2500 | |
| 2501 @deftypefn {GIMPLE function} void gsi_next (gimple_stmt_iterator *i) | |
| 2502 Advance the iterator to the next gimple statement. | |
| 2503 @end deftypefn | |
| 2504 | |
| 2505 @deftypefn {GIMPLE function} void gsi_prev (gimple_stmt_iterator *i) | |
| 2506 Advance the iterator to the previous gimple statement. | |
| 2507 @end deftypefn | |
| 2508 | |
| 2509 @deftypefn {GIMPLE function} gimple gsi_stmt (gimple_stmt_iterator i) | |
| 2510 Return the current stmt. | |
| 2511 @end deftypefn | |
| 2512 | |
| 2513 @deftypefn {GIMPLE function} gimple_stmt_iterator gsi_after_labels (basic_block bb) | |
| 2514 Return a block statement iterator that points to the first | |
| 2515 non-label statement in block @code{BB}. | |
| 2516 @end deftypefn | |
| 2517 | |
|
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2518 @deftypefn {GIMPLE function} {gimple *} gsi_stmt_ptr (gimple_stmt_iterator *i) |
| 0 | 2519 Return a pointer to the current stmt. |
| 2520 @end deftypefn | |
| 2521 | |
| 2522 @deftypefn {GIMPLE function} basic_block gsi_bb (gimple_stmt_iterator i) | |
| 2523 Return the basic block associated with this iterator. | |
| 2524 @end deftypefn | |
| 2525 | |
| 2526 @deftypefn {GIMPLE function} gimple_seq gsi_seq (gimple_stmt_iterator i) | |
| 2527 Return the sequence associated with this iterator. | |
| 2528 @end deftypefn | |
| 2529 | |
| 2530 @deftypefn {GIMPLE function} void gsi_remove (gimple_stmt_iterator *i, bool remove_eh_info) | |
| 2531 Remove the current stmt from the sequence. The iterator is | |
| 2532 updated to point to the next statement. When @code{REMOVE_EH_INFO} is | |
| 2533 true we remove the statement pointed to by iterator @code{I} from the @code{EH} | |
| 2534 tables. Otherwise we do not modify the @code{EH} tables. Generally, | |
| 2535 @code{REMOVE_EH_INFO} should be true when the statement is going to be | |
| 2536 removed from the @code{IL} and not reinserted elsewhere. | |
| 2537 @end deftypefn | |
| 2538 | |
| 2539 @deftypefn {GIMPLE function} void gsi_link_seq_before (gimple_stmt_iterator *i, gimple_seq seq, enum gsi_iterator_update mode) | |
| 2540 Links the sequence of statements @code{SEQ} before the statement pointed | |
| 2541 by iterator @code{I}. @code{MODE} indicates what to do with the iterator | |
| 2542 after insertion (see @code{enum gsi_iterator_update} above). | |
| 2543 @end deftypefn | |
| 2544 | |
| 2545 @deftypefn {GIMPLE function} void gsi_link_before (gimple_stmt_iterator *i, gimple g, enum gsi_iterator_update mode) | |
| 2546 Links statement @code{G} before the statement pointed-to by iterator @code{I}. | |
| 2547 Updates iterator @code{I} according to @code{MODE}. | |
| 2548 @end deftypefn | |
| 2549 | |
|
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2550 @deftypefn {GIMPLE function} void gsi_link_seq_after (gimple_stmt_iterator *i, @ |
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2551 gimple_seq seq, enum gsi_iterator_update mode) |
| 0 | 2552 Links sequence @code{SEQ} after the statement pointed-to by iterator @code{I}. |
| 2553 @code{MODE} is as in @code{gsi_insert_after}. | |
| 2554 @end deftypefn | |
| 2555 | |
|
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2556 @deftypefn {GIMPLE function} void gsi_link_after (gimple_stmt_iterator *i, @ |
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2557 gimple g, enum gsi_iterator_update mode) |
| 0 | 2558 Links statement @code{G} after the statement pointed-to by iterator @code{I}. |
| 2559 @code{MODE} is as in @code{gsi_insert_after}. | |
| 2560 @end deftypefn | |
| 2561 | |
| 2562 @deftypefn {GIMPLE function} gimple_seq gsi_split_seq_after (gimple_stmt_iterator i) | |
| 2563 Move all statements in the sequence after @code{I} to a new sequence. | |
| 2564 Return this new sequence. | |
| 2565 @end deftypefn | |
| 2566 | |
| 2567 @deftypefn {GIMPLE function} gimple_seq gsi_split_seq_before (gimple_stmt_iterator *i) | |
| 2568 Move all statements in the sequence before @code{I} to a new sequence. | |
| 2569 Return this new sequence. | |
| 2570 @end deftypefn | |
| 2571 | |
|
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2572 @deftypefn {GIMPLE function} void gsi_replace (gimple_stmt_iterator *i, @ |
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2573 gimple stmt, bool update_eh_info) |
| 0 | 2574 Replace the statement pointed-to by @code{I} to @code{STMT}. If @code{UPDATE_EH_INFO} |
| 2575 is true, the exception handling information of the original | |
| 2576 statement is moved to the new statement. | |
| 2577 @end deftypefn | |
| 2578 | |
|
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2579 @deftypefn {GIMPLE function} void gsi_insert_before (gimple_stmt_iterator *i, @ |
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2580 gimple stmt, enum gsi_iterator_update mode) |
| 0 | 2581 Insert statement @code{STMT} before the statement pointed-to by iterator |
| 2582 @code{I}, update @code{STMT}'s basic block and scan it for new operands. @code{MODE} | |
| 2583 specifies how to update iterator @code{I} after insertion (see enum | |
| 2584 @code{gsi_iterator_update}). | |
| 2585 @end deftypefn | |
| 2586 | |
|
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2587 @deftypefn {GIMPLE function} void gsi_insert_seq_before (gimple_stmt_iterator *i, @ |
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2588 gimple_seq seq, enum gsi_iterator_update mode) |
| 0 | 2589 Like @code{gsi_insert_before}, but for all the statements in @code{SEQ}. |
| 2590 @end deftypefn | |
| 2591 | |
|
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2592 @deftypefn {GIMPLE function} void gsi_insert_after (gimple_stmt_iterator *i, @ |
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2593 gimple stmt, enum gsi_iterator_update mode) |
| 0 | 2594 Insert statement @code{STMT} after the statement pointed-to by iterator |
| 2595 @code{I}, update @code{STMT}'s basic block and scan it for new operands. @code{MODE} | |
| 2596 specifies how to update iterator @code{I} after insertion (see enum | |
| 2597 @code{gsi_iterator_update}). | |
| 2598 @end deftypefn | |
| 2599 | |
|
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2600 @deftypefn {GIMPLE function} void gsi_insert_seq_after (gimple_stmt_iterator *i, @ |
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2601 gimple_seq seq, enum gsi_iterator_update mode) |
| 0 | 2602 Like @code{gsi_insert_after}, but for all the statements in @code{SEQ}. |
| 2603 @end deftypefn | |
| 2604 | |
| 2605 @deftypefn {GIMPLE function} gimple_stmt_iterator gsi_for_stmt (gimple stmt) | |
| 2606 Finds iterator for @code{STMT}. | |
| 2607 @end deftypefn | |
| 2608 | |
|
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2609 @deftypefn {GIMPLE function} void gsi_move_after (gimple_stmt_iterator *from, @ |
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2610 gimple_stmt_iterator *to) |
| 0 | 2611 Move the statement at @code{FROM} so it comes right after the statement |
| 2612 at @code{TO}. | |
| 2613 @end deftypefn | |
| 2614 | |
|
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2615 @deftypefn {GIMPLE function} void gsi_move_before (gimple_stmt_iterator *from, @ |
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2616 gimple_stmt_iterator *to) |
| 0 | 2617 Move the statement at @code{FROM} so it comes right before the statement |
| 2618 at @code{TO}. | |
| 2619 @end deftypefn | |
| 2620 | |
|
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2621 @deftypefn {GIMPLE function} void gsi_move_to_bb_end (gimple_stmt_iterator *from, @ |
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2622 basic_block bb) |
| 0 | 2623 Move the statement at @code{FROM} to the end of basic block @code{BB}. |
| 2624 @end deftypefn | |
| 2625 | |
| 2626 @deftypefn {GIMPLE function} void gsi_insert_on_edge (edge e, gimple stmt) | |
| 2627 Add @code{STMT} to the pending list of edge @code{E}. No actual insertion is | |
| 2628 made until a call to @code{gsi_commit_edge_inserts}() is made. | |
| 2629 @end deftypefn | |
| 2630 | |
| 2631 @deftypefn {GIMPLE function} void gsi_insert_seq_on_edge (edge e, gimple_seq seq) | |
| 2632 Add the sequence of statements in @code{SEQ} to the pending list of edge | |
| 2633 @code{E}. No actual insertion is made until a call to | |
| 2634 @code{gsi_commit_edge_inserts}() is made. | |
| 2635 @end deftypefn | |
| 2636 | |
| 2637 @deftypefn {GIMPLE function} basic_block gsi_insert_on_edge_immediate (edge e, gimple stmt) | |
| 2638 Similar to @code{gsi_insert_on_edge}+@code{gsi_commit_edge_inserts}. If a new | |
| 2639 block has to be created, it is returned. | |
| 2640 @end deftypefn | |
| 2641 | |
| 2642 @deftypefn {GIMPLE function} void gsi_commit_one_edge_insert (edge e, basic_block *new_bb) | |
| 2643 Commit insertions pending at edge @code{E}. If a new block is created, | |
| 2644 set @code{NEW_BB} to this block, otherwise set it to @code{NULL}. | |
| 2645 @end deftypefn | |
| 2646 | |
| 2647 @deftypefn {GIMPLE function} void gsi_commit_edge_inserts (void) | |
| 2648 This routine will commit all pending edge insertions, creating | |
| 2649 any new basic blocks which are necessary. | |
| 2650 @end deftypefn | |
| 2651 | |
| 2652 | |
| 2653 @node Adding a new GIMPLE statement code | |
| 2654 @section Adding a new GIMPLE statement code | |
| 2655 @cindex Adding a new GIMPLE statement code | |
| 2656 | |
| 2657 The first step in adding a new GIMPLE statement code, is | |
| 2658 modifying the file @code{gimple.def}, which contains all the GIMPLE | |
| 111 | 2659 codes. Then you must add a corresponding gimple subclass |
| 2660 located in @code{gimple.h}. This in turn, will require you to add a | |
| 2661 corresponding @code{GTY} tag in @code{gsstruct.def}, and code to handle | |
| 2662 this tag in @code{gss_for_code} which is located in @code{gimple.c}. | |
| 0 | 2663 |
| 2664 In order for the garbage collector to know the size of the | |
| 2665 structure you created in @code{gimple.h}, you need to add a case to | |
| 2666 handle your new GIMPLE statement in @code{gimple_size} which is located | |
| 2667 in @code{gimple.c}. | |
| 2668 | |
| 2669 You will probably want to create a function to build the new | |
| 2670 gimple statement in @code{gimple.c}. The function should be called | |
|
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2671 @code{gimple_build_@var{new-tuple-name}}, and should return the new tuple |
| 111 | 2672 as a pointer to the appropriate gimple subclass. |
| 0 | 2673 |
| 2674 If your new statement requires accessors for any members or | |
| 2675 operands it may have, put simple inline accessors in | |
| 2676 @code{gimple.h} and any non-trivial accessors in @code{gimple.c} with a | |
| 2677 corresponding prototype in @code{gimple.h}. | |
| 2678 | |
| 111 | 2679 You should add the new statement subclass to the class hierarchy diagram |
| 2680 in @code{gimple.texi}. | |
| 2681 | |
| 0 | 2682 |
| 2683 @node Statement and operand traversals | |
| 2684 @section Statement and operand traversals | |
| 2685 @cindex Statement and operand traversals | |
| 111 | 2686 |
| 0 | 2687 There are two functions available for walking statements and |
| 2688 sequences: @code{walk_gimple_stmt} and @code{walk_gimple_seq}, | |
| 2689 accordingly, and a third function for walking the operands in a | |
| 2690 statement: @code{walk_gimple_op}. | |
| 2691 | |
|
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2692 @deftypefn {GIMPLE function} tree walk_gimple_stmt (gimple_stmt_iterator *gsi, @ |
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2693 walk_stmt_fn callback_stmt, walk_tree_fn callback_op, struct walk_stmt_info *wi) |
| 0 | 2694 This function is used to walk the current statement in @code{GSI}, |
| 2695 optionally using traversal state stored in @code{WI}. If @code{WI} is @code{NULL}, no | |
| 2696 state is kept during the traversal. | |
| 2697 | |
| 2698 The callback @code{CALLBACK_STMT} is called. If @code{CALLBACK_STMT} returns | |
| 2699 true, it means that the callback function has handled all the | |
| 2700 operands of the statement and it is not necessary to walk its | |
| 2701 operands. | |
| 2702 | |
| 2703 If @code{CALLBACK_STMT} is @code{NULL} or it returns false, @code{CALLBACK_OP} is | |
| 2704 called on each operand of the statement via @code{walk_gimple_op}. If | |
| 2705 @code{walk_gimple_op} returns non-@code{NULL} for any operand, the remaining | |
| 2706 operands are not scanned. | |
| 2707 | |
| 2708 The return value is that returned by the last call to | |
| 2709 @code{walk_gimple_op}, or @code{NULL_TREE} if no @code{CALLBACK_OP} is specified. | |
| 2710 @end deftypefn | |
| 2711 | |
| 2712 | |
|
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2713 @deftypefn {GIMPLE function} tree walk_gimple_op (gimple stmt, @ |
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2714 walk_tree_fn callback_op, struct walk_stmt_info *wi) |
| 0 | 2715 Use this function to walk the operands of statement @code{STMT}. Every |
| 2716 operand is walked via @code{walk_tree} with optional state information | |
| 2717 in @code{WI}. | |
| 2718 | |
| 2719 @code{CALLBACK_OP} is called on each operand of @code{STMT} via @code{walk_tree}. | |
| 2720 Additional parameters to @code{walk_tree} must be stored in @code{WI}. For | |
| 2721 each operand @code{OP}, @code{walk_tree} is called as: | |
| 2722 | |
| 2723 @smallexample | |
|
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2724 walk_tree (&@code{OP}, @code{CALLBACK_OP}, @code{WI}, @code{PSET}) |
| 0 | 2725 @end smallexample |
| 2726 | |
| 2727 If @code{CALLBACK_OP} returns non-@code{NULL} for an operand, the remaining | |
| 2728 operands are not scanned. The return value is that returned by | |
| 2729 the last call to @code{walk_tree}, or @code{NULL_TREE} if no @code{CALLBACK_OP} is | |
| 2730 specified. | |
| 2731 @end deftypefn | |
| 2732 | |
| 2733 | |
|
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2734 @deftypefn {GIMPLE function} tree walk_gimple_seq (gimple_seq seq, @ |
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2735 walk_stmt_fn callback_stmt, walk_tree_fn callback_op, struct walk_stmt_info *wi) |
| 0 | 2736 This function walks all the statements in the sequence @code{SEQ} |
| 2737 calling @code{walk_gimple_stmt} on each one. @code{WI} is as in | |
| 2738 @code{walk_gimple_stmt}. If @code{walk_gimple_stmt} returns non-@code{NULL}, the walk | |
| 2739 is stopped and the value returned. Otherwise, all the statements | |
| 2740 are walked and @code{NULL_TREE} returned. | |
| 2741 @end deftypefn |