1 //===- BuildLibCalls.cpp - Utility builder for libcalls -------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements some functions that will create standard C libcalls. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Transforms/Utils/BuildLibCalls.h" 14 #include "llvm/ADT/SmallString.h" 15 #include "llvm/ADT/Statistic.h" 16 #include "llvm/Analysis/MemoryBuiltins.h" 17 #include "llvm/Analysis/TargetLibraryInfo.h" 18 #include "llvm/IR/Argument.h" 19 #include "llvm/IR/CallingConv.h" 20 #include "llvm/IR/Constants.h" 21 #include "llvm/IR/DataLayout.h" 22 #include "llvm/IR/Function.h" 23 #include "llvm/IR/IRBuilder.h" 24 #include "llvm/IR/Module.h" 25 #include "llvm/IR/Type.h" 26 #include "llvm/Support/TypeSize.h" 27 #include <optional> 28 29 using namespace llvm; 30 31 #define DEBUG_TYPE "build-libcalls" 32 33 //- Infer Attributes ---------------------------------------------------------// 34 35 STATISTIC(NumReadNone, "Number of functions inferred as readnone"); 36 STATISTIC(NumInaccessibleMemOnly, 37 "Number of functions inferred as inaccessiblememonly"); 38 STATISTIC(NumReadOnly, "Number of functions inferred as readonly"); 39 STATISTIC(NumWriteOnly, "Number of functions inferred as writeonly"); 40 STATISTIC(NumArgMemOnly, "Number of functions inferred as argmemonly"); 41 STATISTIC(NumInaccessibleMemOrArgMemOnly, 42 "Number of functions inferred as inaccessiblemem_or_argmemonly"); 43 STATISTIC(NumNoUnwind, "Number of functions inferred as nounwind"); 44 STATISTIC(NumNoCapture, "Number of arguments inferred as nocapture"); 45 STATISTIC(NumWriteOnlyArg, "Number of arguments inferred as writeonly"); 46 STATISTIC(NumReadOnlyArg, "Number of arguments inferred as readonly"); 47 STATISTIC(NumNoAlias, "Number of function returns inferred as noalias"); 48 STATISTIC(NumNoUndef, "Number of function returns inferred as noundef returns"); 49 STATISTIC(NumReturnedArg, "Number of arguments inferred as returned"); 50 STATISTIC(NumWillReturn, "Number of functions inferred as willreturn"); 51 52 static bool setDoesNotAccessMemory(Function &F) { 53 if (F.doesNotAccessMemory()) 54 return false; 55 F.setDoesNotAccessMemory(); 56 ++NumReadNone; 57 return true; 58 } 59 60 static bool setOnlyAccessesInaccessibleMemory(Function &F) { 61 if (F.onlyAccessesInaccessibleMemory()) 62 return false; 63 F.setOnlyAccessesInaccessibleMemory(); 64 ++NumInaccessibleMemOnly; 65 return true; 66 } 67 68 static bool setOnlyReadsMemory(Function &F) { 69 if (F.onlyReadsMemory()) 70 return false; 71 F.setOnlyReadsMemory(); 72 ++NumReadOnly; 73 return true; 74 } 75 76 static bool setOnlyWritesMemory(Function &F) { 77 if (F.onlyWritesMemory()) // writeonly or readnone 78 return false; 79 ++NumWriteOnly; 80 F.setOnlyWritesMemory(); 81 return true; 82 } 83 84 static bool setOnlyAccessesArgMemory(Function &F) { 85 if (F.onlyAccessesArgMemory()) 86 return false; 87 F.setOnlyAccessesArgMemory(); 88 ++NumArgMemOnly; 89 return true; 90 } 91 92 static bool setOnlyAccessesInaccessibleMemOrArgMem(Function &F) { 93 if (F.onlyAccessesInaccessibleMemOrArgMem()) 94 return false; 95 F.setOnlyAccessesInaccessibleMemOrArgMem(); 96 ++NumInaccessibleMemOrArgMemOnly; 97 return true; 98 } 99 100 static bool setDoesNotThrow(Function &F) { 101 if (F.doesNotThrow()) 102 return false; 103 F.setDoesNotThrow(); 104 ++NumNoUnwind; 105 return true; 106 } 107 108 static bool setRetDoesNotAlias(Function &F) { 109 if (F.hasRetAttribute(Attribute::NoAlias)) 110 return false; 111 F.addRetAttr(Attribute::NoAlias); 112 ++NumNoAlias; 113 return true; 114 } 115 116 static bool setDoesNotCapture(Function &F, unsigned ArgNo) { 117 if (F.hasParamAttribute(ArgNo, Attribute::NoCapture)) 118 return false; 119 F.addParamAttr(ArgNo, Attribute::NoCapture); 120 ++NumNoCapture; 121 return true; 122 } 123 124 static bool setDoesNotAlias(Function &F, unsigned ArgNo) { 125 if (F.hasParamAttribute(ArgNo, Attribute::NoAlias)) 126 return false; 127 F.addParamAttr(ArgNo, Attribute::NoAlias); 128 ++NumNoAlias; 129 return true; 130 } 131 132 static bool setOnlyReadsMemory(Function &F, unsigned ArgNo) { 133 if (F.hasParamAttribute(ArgNo, Attribute::ReadOnly)) 134 return false; 135 F.addParamAttr(ArgNo, Attribute::ReadOnly); 136 ++NumReadOnlyArg; 137 return true; 138 } 139 140 static bool setOnlyWritesMemory(Function &F, unsigned ArgNo) { 141 if (F.hasParamAttribute(ArgNo, Attribute::WriteOnly)) 142 return false; 143 F.addParamAttr(ArgNo, Attribute::WriteOnly); 144 ++NumWriteOnlyArg; 145 return true; 146 } 147 148 static bool setRetNoUndef(Function &F) { 149 if (!F.getReturnType()->isVoidTy() && 150 !F.hasRetAttribute(Attribute::NoUndef)) { 151 F.addRetAttr(Attribute::NoUndef); 152 ++NumNoUndef; 153 return true; 154 } 155 return false; 156 } 157 158 static bool setArgsNoUndef(Function &F) { 159 bool Changed = false; 160 for (unsigned ArgNo = 0; ArgNo < F.arg_size(); ++ArgNo) { 161 if (!F.hasParamAttribute(ArgNo, Attribute::NoUndef)) { 162 F.addParamAttr(ArgNo, Attribute::NoUndef); 163 ++NumNoUndef; 164 Changed = true; 165 } 166 } 167 return Changed; 168 } 169 170 static bool setArgNoUndef(Function &F, unsigned ArgNo) { 171 if (F.hasParamAttribute(ArgNo, Attribute::NoUndef)) 172 return false; 173 F.addParamAttr(ArgNo, Attribute::NoUndef); 174 ++NumNoUndef; 175 return true; 176 } 177 178 static bool setRetAndArgsNoUndef(Function &F) { 179 bool UndefAdded = false; 180 UndefAdded |= setRetNoUndef(F); 181 UndefAdded |= setArgsNoUndef(F); 182 return UndefAdded; 183 } 184 185 static bool setReturnedArg(Function &F, unsigned ArgNo) { 186 if (F.hasParamAttribute(ArgNo, Attribute::Returned)) 187 return false; 188 F.addParamAttr(ArgNo, Attribute::Returned); 189 ++NumReturnedArg; 190 return true; 191 } 192 193 static bool setNonLazyBind(Function &F) { 194 if (F.hasFnAttribute(Attribute::NonLazyBind)) 195 return false; 196 F.addFnAttr(Attribute::NonLazyBind); 197 return true; 198 } 199 200 static bool setDoesNotFreeMemory(Function &F) { 201 if (F.hasFnAttribute(Attribute::NoFree)) 202 return false; 203 F.addFnAttr(Attribute::NoFree); 204 return true; 205 } 206 207 static bool setWillReturn(Function &F) { 208 if (F.hasFnAttribute(Attribute::WillReturn)) 209 return false; 210 F.addFnAttr(Attribute::WillReturn); 211 ++NumWillReturn; 212 return true; 213 } 214 215 static bool setAlignedAllocParam(Function &F, unsigned ArgNo) { 216 if (F.hasParamAttribute(ArgNo, Attribute::AllocAlign)) 217 return false; 218 F.addParamAttr(ArgNo, Attribute::AllocAlign); 219 return true; 220 } 221 222 static bool setAllocatedPointerParam(Function &F, unsigned ArgNo) { 223 if (F.hasParamAttribute(ArgNo, Attribute::AllocatedPointer)) 224 return false; 225 F.addParamAttr(ArgNo, Attribute::AllocatedPointer); 226 return true; 227 } 228 229 static bool setAllocSize(Function &F, unsigned ElemSizeArg, 230 std::optional<unsigned> NumElemsArg) { 231 if (F.hasFnAttribute(Attribute::AllocSize)) 232 return false; 233 F.addFnAttr(Attribute::getWithAllocSizeArgs(F.getContext(), ElemSizeArg, 234 NumElemsArg)); 235 return true; 236 } 237 238 static bool setAllocFamily(Function &F, StringRef Family) { 239 if (F.hasFnAttribute("alloc-family")) 240 return false; 241 F.addFnAttr("alloc-family", Family); 242 return true; 243 } 244 245 static bool setAllocKind(Function &F, AllocFnKind K) { 246 if (F.hasFnAttribute(Attribute::AllocKind)) 247 return false; 248 F.addFnAttr( 249 Attribute::get(F.getContext(), Attribute::AllocKind, uint64_t(K))); 250 return true; 251 } 252 253 bool llvm::inferNonMandatoryLibFuncAttrs(Module *M, StringRef Name, 254 const TargetLibraryInfo &TLI) { 255 Function *F = M->getFunction(Name); 256 if (!F) 257 return false; 258 return inferNonMandatoryLibFuncAttrs(*F, TLI); 259 } 260 261 bool llvm::inferNonMandatoryLibFuncAttrs(Function &F, 262 const TargetLibraryInfo &TLI) { 263 LibFunc TheLibFunc; 264 if (!(TLI.getLibFunc(F, TheLibFunc) && TLI.has(TheLibFunc))) 265 return false; 266 267 bool Changed = false; 268 269 if (F.getParent() != nullptr && F.getParent()->getRtLibUseGOT()) 270 Changed |= setNonLazyBind(F); 271 272 switch (TheLibFunc) { 273 case LibFunc_strlen: 274 case LibFunc_strnlen: 275 case LibFunc_wcslen: 276 Changed |= setOnlyReadsMemory(F); 277 Changed |= setDoesNotThrow(F); 278 Changed |= setOnlyAccessesArgMemory(F); 279 Changed |= setWillReturn(F); 280 Changed |= setDoesNotCapture(F, 0); 281 break; 282 case LibFunc_strchr: 283 case LibFunc_strrchr: 284 Changed |= setOnlyAccessesArgMemory(F); 285 Changed |= setOnlyReadsMemory(F); 286 Changed |= setDoesNotThrow(F); 287 Changed |= setWillReturn(F); 288 break; 289 case LibFunc_strtol: 290 case LibFunc_strtod: 291 case LibFunc_strtof: 292 case LibFunc_strtoul: 293 case LibFunc_strtoll: 294 case LibFunc_strtold: 295 case LibFunc_strtoull: 296 Changed |= setDoesNotThrow(F); 297 Changed |= setWillReturn(F); 298 Changed |= setDoesNotCapture(F, 1); 299 Changed |= setOnlyReadsMemory(F, 0); 300 break; 301 case LibFunc_strcat: 302 case LibFunc_strncat: 303 Changed |= setOnlyAccessesArgMemory(F); 304 Changed |= setDoesNotThrow(F); 305 Changed |= setWillReturn(F); 306 Changed |= setReturnedArg(F, 0); 307 Changed |= setDoesNotCapture(F, 1); 308 Changed |= setOnlyReadsMemory(F, 1); 309 Changed |= setDoesNotAlias(F, 0); 310 Changed |= setDoesNotAlias(F, 1); 311 break; 312 case LibFunc_strcpy: 313 case LibFunc_strncpy: 314 Changed |= setReturnedArg(F, 0); 315 [[fallthrough]]; 316 case LibFunc_stpcpy: 317 case LibFunc_stpncpy: 318 Changed |= setOnlyAccessesArgMemory(F); 319 Changed |= setDoesNotThrow(F); 320 Changed |= setWillReturn(F); 321 Changed |= setDoesNotCapture(F, 1); 322 Changed |= setOnlyWritesMemory(F, 0); 323 Changed |= setOnlyReadsMemory(F, 1); 324 Changed |= setDoesNotAlias(F, 0); 325 Changed |= setDoesNotAlias(F, 1); 326 break; 327 case LibFunc_strxfrm: 328 Changed |= setDoesNotThrow(F); 329 Changed |= setWillReturn(F); 330 Changed |= setDoesNotCapture(F, 0); 331 Changed |= setDoesNotCapture(F, 1); 332 Changed |= setOnlyReadsMemory(F, 1); 333 break; 334 case LibFunc_strcmp: // 0,1 335 case LibFunc_strspn: // 0,1 336 case LibFunc_strncmp: // 0,1 337 case LibFunc_strcspn: // 0,1 338 Changed |= setDoesNotThrow(F); 339 Changed |= setOnlyAccessesArgMemory(F); 340 Changed |= setWillReturn(F); 341 Changed |= setOnlyReadsMemory(F); 342 Changed |= setDoesNotCapture(F, 0); 343 Changed |= setDoesNotCapture(F, 1); 344 break; 345 case LibFunc_strcoll: 346 case LibFunc_strcasecmp: // 0,1 347 case LibFunc_strncasecmp: // 348 // Those functions may depend on the locale, which may be accessed through 349 // global memory. 350 Changed |= setOnlyReadsMemory(F); 351 Changed |= setDoesNotThrow(F); 352 Changed |= setWillReturn(F); 353 Changed |= setDoesNotCapture(F, 0); 354 Changed |= setDoesNotCapture(F, 1); 355 break; 356 case LibFunc_strstr: 357 case LibFunc_strpbrk: 358 Changed |= setOnlyAccessesArgMemory(F); 359 Changed |= setOnlyReadsMemory(F); 360 Changed |= setDoesNotThrow(F); 361 Changed |= setWillReturn(F); 362 Changed |= setDoesNotCapture(F, 1); 363 break; 364 case LibFunc_strtok: 365 case LibFunc_strtok_r: 366 Changed |= setDoesNotThrow(F); 367 Changed |= setWillReturn(F); 368 Changed |= setDoesNotCapture(F, 1); 369 Changed |= setOnlyReadsMemory(F, 1); 370 break; 371 case LibFunc_scanf: 372 Changed |= setRetAndArgsNoUndef(F); 373 Changed |= setDoesNotThrow(F); 374 Changed |= setDoesNotCapture(F, 0); 375 Changed |= setOnlyReadsMemory(F, 0); 376 break; 377 case LibFunc_setbuf: 378 case LibFunc_setvbuf: 379 Changed |= setRetAndArgsNoUndef(F); 380 Changed |= setDoesNotThrow(F); 381 Changed |= setDoesNotCapture(F, 0); 382 break; 383 case LibFunc_strndup: 384 Changed |= setArgNoUndef(F, 1); 385 [[fallthrough]]; 386 case LibFunc_strdup: 387 Changed |= setAllocFamily(F, "malloc"); 388 Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F); 389 Changed |= setDoesNotThrow(F); 390 Changed |= setRetDoesNotAlias(F); 391 Changed |= setWillReturn(F); 392 Changed |= setDoesNotCapture(F, 0); 393 Changed |= setOnlyReadsMemory(F, 0); 394 break; 395 case LibFunc_stat: 396 case LibFunc_statvfs: 397 Changed |= setRetAndArgsNoUndef(F); 398 Changed |= setDoesNotThrow(F); 399 Changed |= setDoesNotCapture(F, 0); 400 Changed |= setDoesNotCapture(F, 1); 401 Changed |= setOnlyReadsMemory(F, 0); 402 break; 403 case LibFunc_sscanf: 404 Changed |= setRetAndArgsNoUndef(F); 405 Changed |= setDoesNotThrow(F); 406 Changed |= setDoesNotCapture(F, 0); 407 Changed |= setDoesNotCapture(F, 1); 408 Changed |= setOnlyReadsMemory(F, 0); 409 Changed |= setOnlyReadsMemory(F, 1); 410 break; 411 case LibFunc_sprintf: 412 Changed |= setRetAndArgsNoUndef(F); 413 Changed |= setDoesNotThrow(F); 414 Changed |= setDoesNotCapture(F, 0); 415 Changed |= setDoesNotAlias(F, 0); 416 Changed |= setOnlyWritesMemory(F, 0); 417 Changed |= setDoesNotCapture(F, 1); 418 Changed |= setOnlyReadsMemory(F, 1); 419 break; 420 case LibFunc_snprintf: 421 Changed |= setRetAndArgsNoUndef(F); 422 Changed |= setDoesNotThrow(F); 423 Changed |= setDoesNotCapture(F, 0); 424 Changed |= setDoesNotAlias(F, 0); 425 Changed |= setOnlyWritesMemory(F, 0); 426 Changed |= setDoesNotCapture(F, 2); 427 Changed |= setOnlyReadsMemory(F, 2); 428 break; 429 case LibFunc_setitimer: 430 Changed |= setRetAndArgsNoUndef(F); 431 Changed |= setDoesNotThrow(F); 432 Changed |= setWillReturn(F); 433 Changed |= setDoesNotCapture(F, 1); 434 Changed |= setDoesNotCapture(F, 2); 435 Changed |= setOnlyReadsMemory(F, 1); 436 break; 437 case LibFunc_system: 438 // May throw; "system" is a valid pthread cancellation point. 439 Changed |= setRetAndArgsNoUndef(F); 440 Changed |= setDoesNotCapture(F, 0); 441 Changed |= setOnlyReadsMemory(F, 0); 442 break; 443 case LibFunc_aligned_alloc: 444 Changed |= setAlignedAllocParam(F, 0); 445 Changed |= setAllocSize(F, 1, std::nullopt); 446 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Uninitialized | AllocFnKind::Aligned); 447 [[fallthrough]]; 448 case LibFunc_valloc: 449 case LibFunc_malloc: 450 case LibFunc_vec_malloc: 451 Changed |= setAllocFamily(F, TheLibFunc == LibFunc_vec_malloc ? "vec_malloc" 452 : "malloc"); 453 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Uninitialized); 454 Changed |= setAllocSize(F, 0, std::nullopt); 455 Changed |= setOnlyAccessesInaccessibleMemory(F); 456 Changed |= setRetAndArgsNoUndef(F); 457 Changed |= setDoesNotThrow(F); 458 Changed |= setRetDoesNotAlias(F); 459 Changed |= setWillReturn(F); 460 break; 461 case LibFunc_memcmp: 462 Changed |= setOnlyAccessesArgMemory(F); 463 Changed |= setOnlyReadsMemory(F); 464 Changed |= setDoesNotThrow(F); 465 Changed |= setWillReturn(F); 466 Changed |= setDoesNotCapture(F, 0); 467 Changed |= setDoesNotCapture(F, 1); 468 break; 469 case LibFunc_memchr: 470 case LibFunc_memrchr: 471 Changed |= setDoesNotThrow(F); 472 Changed |= setOnlyAccessesArgMemory(F); 473 Changed |= setOnlyReadsMemory(F); 474 Changed |= setWillReturn(F); 475 break; 476 case LibFunc_modf: 477 case LibFunc_modff: 478 case LibFunc_modfl: 479 Changed |= setDoesNotThrow(F); 480 Changed |= setWillReturn(F); 481 Changed |= setOnlyAccessesArgMemory(F); 482 Changed |= setOnlyWritesMemory(F); 483 Changed |= setDoesNotCapture(F, 1); 484 break; 485 case LibFunc_memcpy: 486 Changed |= setDoesNotThrow(F); 487 Changed |= setOnlyAccessesArgMemory(F); 488 Changed |= setWillReturn(F); 489 Changed |= setDoesNotAlias(F, 0); 490 Changed |= setReturnedArg(F, 0); 491 Changed |= setOnlyWritesMemory(F, 0); 492 Changed |= setDoesNotAlias(F, 1); 493 Changed |= setDoesNotCapture(F, 1); 494 Changed |= setOnlyReadsMemory(F, 1); 495 break; 496 case LibFunc_memmove: 497 Changed |= setDoesNotThrow(F); 498 Changed |= setOnlyAccessesArgMemory(F); 499 Changed |= setWillReturn(F); 500 Changed |= setReturnedArg(F, 0); 501 Changed |= setOnlyWritesMemory(F, 0); 502 Changed |= setDoesNotCapture(F, 1); 503 Changed |= setOnlyReadsMemory(F, 1); 504 break; 505 case LibFunc_mempcpy: 506 case LibFunc_memccpy: 507 Changed |= setWillReturn(F); 508 [[fallthrough]]; 509 case LibFunc_memcpy_chk: 510 Changed |= setDoesNotThrow(F); 511 Changed |= setOnlyAccessesArgMemory(F); 512 Changed |= setDoesNotAlias(F, 0); 513 Changed |= setOnlyWritesMemory(F, 0); 514 Changed |= setDoesNotAlias(F, 1); 515 Changed |= setDoesNotCapture(F, 1); 516 Changed |= setOnlyReadsMemory(F, 1); 517 break; 518 case LibFunc_memalign: 519 Changed |= setAllocFamily(F, "malloc"); 520 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Aligned | 521 AllocFnKind::Uninitialized); 522 Changed |= setAllocSize(F, 1, std::nullopt); 523 Changed |= setAlignedAllocParam(F, 0); 524 Changed |= setOnlyAccessesInaccessibleMemory(F); 525 Changed |= setRetNoUndef(F); 526 Changed |= setDoesNotThrow(F); 527 Changed |= setRetDoesNotAlias(F); 528 Changed |= setWillReturn(F); 529 break; 530 case LibFunc_mkdir: 531 Changed |= setRetAndArgsNoUndef(F); 532 Changed |= setDoesNotThrow(F); 533 Changed |= setDoesNotCapture(F, 0); 534 Changed |= setOnlyReadsMemory(F, 0); 535 break; 536 case LibFunc_mktime: 537 Changed |= setRetAndArgsNoUndef(F); 538 Changed |= setDoesNotThrow(F); 539 Changed |= setWillReturn(F); 540 Changed |= setDoesNotCapture(F, 0); 541 break; 542 case LibFunc_realloc: 543 case LibFunc_reallocf: 544 case LibFunc_vec_realloc: 545 Changed |= setAllocFamily( 546 F, TheLibFunc == LibFunc_vec_realloc ? "vec_malloc" : "malloc"); 547 Changed |= setAllocKind(F, AllocFnKind::Realloc); 548 Changed |= setAllocatedPointerParam(F, 0); 549 Changed |= setAllocSize(F, 1, std::nullopt); 550 Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F); 551 Changed |= setRetNoUndef(F); 552 Changed |= setDoesNotThrow(F); 553 Changed |= setRetDoesNotAlias(F); 554 Changed |= setWillReturn(F); 555 Changed |= setDoesNotCapture(F, 0); 556 Changed |= setArgNoUndef(F, 1); 557 break; 558 case LibFunc_read: 559 // May throw; "read" is a valid pthread cancellation point. 560 Changed |= setRetAndArgsNoUndef(F); 561 Changed |= setDoesNotCapture(F, 1); 562 break; 563 case LibFunc_rewind: 564 Changed |= setRetAndArgsNoUndef(F); 565 Changed |= setDoesNotThrow(F); 566 Changed |= setDoesNotCapture(F, 0); 567 break; 568 case LibFunc_rmdir: 569 case LibFunc_remove: 570 case LibFunc_realpath: 571 Changed |= setRetAndArgsNoUndef(F); 572 Changed |= setDoesNotThrow(F); 573 Changed |= setDoesNotCapture(F, 0); 574 Changed |= setOnlyReadsMemory(F, 0); 575 break; 576 case LibFunc_rename: 577 Changed |= setRetAndArgsNoUndef(F); 578 Changed |= setDoesNotThrow(F); 579 Changed |= setDoesNotCapture(F, 0); 580 Changed |= setDoesNotCapture(F, 1); 581 Changed |= setOnlyReadsMemory(F, 0); 582 Changed |= setOnlyReadsMemory(F, 1); 583 break; 584 case LibFunc_readlink: 585 Changed |= setRetAndArgsNoUndef(F); 586 Changed |= setDoesNotThrow(F); 587 Changed |= setDoesNotCapture(F, 0); 588 Changed |= setDoesNotCapture(F, 1); 589 Changed |= setOnlyReadsMemory(F, 0); 590 break; 591 case LibFunc_write: 592 // May throw; "write" is a valid pthread cancellation point. 593 Changed |= setRetAndArgsNoUndef(F); 594 Changed |= setDoesNotCapture(F, 1); 595 Changed |= setOnlyReadsMemory(F, 1); 596 break; 597 case LibFunc_bcopy: 598 Changed |= setDoesNotThrow(F); 599 Changed |= setOnlyAccessesArgMemory(F); 600 Changed |= setWillReturn(F); 601 Changed |= setDoesNotCapture(F, 0); 602 Changed |= setOnlyReadsMemory(F, 0); 603 Changed |= setOnlyWritesMemory(F, 1); 604 Changed |= setDoesNotCapture(F, 1); 605 break; 606 case LibFunc_bcmp: 607 Changed |= setDoesNotThrow(F); 608 Changed |= setOnlyAccessesArgMemory(F); 609 Changed |= setOnlyReadsMemory(F); 610 Changed |= setWillReturn(F); 611 Changed |= setDoesNotCapture(F, 0); 612 Changed |= setDoesNotCapture(F, 1); 613 break; 614 case LibFunc_bzero: 615 Changed |= setDoesNotThrow(F); 616 Changed |= setOnlyAccessesArgMemory(F); 617 Changed |= setWillReturn(F); 618 Changed |= setDoesNotCapture(F, 0); 619 Changed |= setOnlyWritesMemory(F, 0); 620 break; 621 case LibFunc_calloc: 622 case LibFunc_vec_calloc: 623 Changed |= setAllocFamily(F, TheLibFunc == LibFunc_vec_calloc ? "vec_malloc" 624 : "malloc"); 625 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Zeroed); 626 Changed |= setAllocSize(F, 0, 1); 627 Changed |= setOnlyAccessesInaccessibleMemory(F); 628 Changed |= setRetAndArgsNoUndef(F); 629 Changed |= setDoesNotThrow(F); 630 Changed |= setRetDoesNotAlias(F); 631 Changed |= setWillReturn(F); 632 break; 633 case LibFunc_chmod: 634 case LibFunc_chown: 635 Changed |= setRetAndArgsNoUndef(F); 636 Changed |= setDoesNotThrow(F); 637 Changed |= setDoesNotCapture(F, 0); 638 Changed |= setOnlyReadsMemory(F, 0); 639 break; 640 case LibFunc_ctermid: 641 case LibFunc_clearerr: 642 case LibFunc_closedir: 643 Changed |= setRetAndArgsNoUndef(F); 644 Changed |= setDoesNotThrow(F); 645 Changed |= setDoesNotCapture(F, 0); 646 break; 647 case LibFunc_atoi: 648 case LibFunc_atol: 649 case LibFunc_atof: 650 case LibFunc_atoll: 651 Changed |= setDoesNotThrow(F); 652 Changed |= setOnlyReadsMemory(F); 653 Changed |= setWillReturn(F); 654 Changed |= setDoesNotCapture(F, 0); 655 break; 656 case LibFunc_access: 657 Changed |= setRetAndArgsNoUndef(F); 658 Changed |= setDoesNotThrow(F); 659 Changed |= setDoesNotCapture(F, 0); 660 Changed |= setOnlyReadsMemory(F, 0); 661 break; 662 case LibFunc_fopen: 663 Changed |= setRetAndArgsNoUndef(F); 664 Changed |= setDoesNotThrow(F); 665 Changed |= setRetDoesNotAlias(F); 666 Changed |= setDoesNotCapture(F, 0); 667 Changed |= setDoesNotCapture(F, 1); 668 Changed |= setOnlyReadsMemory(F, 0); 669 Changed |= setOnlyReadsMemory(F, 1); 670 break; 671 case LibFunc_fdopen: 672 Changed |= setRetAndArgsNoUndef(F); 673 Changed |= setDoesNotThrow(F); 674 Changed |= setRetDoesNotAlias(F); 675 Changed |= setDoesNotCapture(F, 1); 676 Changed |= setOnlyReadsMemory(F, 1); 677 break; 678 case LibFunc_feof: 679 Changed |= setRetAndArgsNoUndef(F); 680 Changed |= setDoesNotThrow(F); 681 Changed |= setDoesNotCapture(F, 0); 682 break; 683 case LibFunc_free: 684 case LibFunc_vec_free: 685 Changed |= setAllocFamily(F, TheLibFunc == LibFunc_vec_free ? "vec_malloc" 686 : "malloc"); 687 Changed |= setAllocKind(F, AllocFnKind::Free); 688 Changed |= setAllocatedPointerParam(F, 0); 689 Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F); 690 Changed |= setArgsNoUndef(F); 691 Changed |= setDoesNotThrow(F); 692 Changed |= setWillReturn(F); 693 Changed |= setDoesNotCapture(F, 0); 694 break; 695 case LibFunc_fseek: 696 case LibFunc_ftell: 697 case LibFunc_fgetc: 698 case LibFunc_fgetc_unlocked: 699 case LibFunc_fseeko: 700 case LibFunc_ftello: 701 case LibFunc_fileno: 702 case LibFunc_fflush: 703 case LibFunc_fclose: 704 case LibFunc_fsetpos: 705 case LibFunc_flockfile: 706 case LibFunc_funlockfile: 707 case LibFunc_ftrylockfile: 708 Changed |= setRetAndArgsNoUndef(F); 709 Changed |= setDoesNotThrow(F); 710 Changed |= setDoesNotCapture(F, 0); 711 break; 712 case LibFunc_ferror: 713 Changed |= setRetAndArgsNoUndef(F); 714 Changed |= setDoesNotThrow(F); 715 Changed |= setDoesNotCapture(F, 0); 716 Changed |= setOnlyReadsMemory(F); 717 break; 718 case LibFunc_fputc: 719 case LibFunc_fputc_unlocked: 720 case LibFunc_fstat: 721 Changed |= setRetAndArgsNoUndef(F); 722 Changed |= setDoesNotThrow(F); 723 Changed |= setDoesNotCapture(F, 1); 724 break; 725 case LibFunc_frexp: 726 case LibFunc_frexpf: 727 case LibFunc_frexpl: 728 Changed |= setDoesNotThrow(F); 729 Changed |= setWillReturn(F); 730 Changed |= setOnlyAccessesArgMemory(F); 731 Changed |= setOnlyWritesMemory(F); 732 Changed |= setDoesNotCapture(F, 1); 733 break; 734 case LibFunc_fstatvfs: 735 Changed |= setRetAndArgsNoUndef(F); 736 Changed |= setDoesNotThrow(F); 737 Changed |= setDoesNotCapture(F, 1); 738 break; 739 case LibFunc_fgets: 740 case LibFunc_fgets_unlocked: 741 Changed |= setRetAndArgsNoUndef(F); 742 Changed |= setDoesNotThrow(F); 743 Changed |= setDoesNotCapture(F, 2); 744 break; 745 case LibFunc_fread: 746 case LibFunc_fread_unlocked: 747 Changed |= setRetAndArgsNoUndef(F); 748 Changed |= setDoesNotThrow(F); 749 Changed |= setDoesNotCapture(F, 0); 750 Changed |= setDoesNotCapture(F, 3); 751 break; 752 case LibFunc_fwrite: 753 case LibFunc_fwrite_unlocked: 754 Changed |= setRetAndArgsNoUndef(F); 755 Changed |= setDoesNotThrow(F); 756 Changed |= setDoesNotCapture(F, 0); 757 Changed |= setDoesNotCapture(F, 3); 758 // FIXME: readonly #1? 759 break; 760 case LibFunc_fputs: 761 case LibFunc_fputs_unlocked: 762 Changed |= setRetAndArgsNoUndef(F); 763 Changed |= setDoesNotThrow(F); 764 Changed |= setDoesNotCapture(F, 0); 765 Changed |= setDoesNotCapture(F, 1); 766 Changed |= setOnlyReadsMemory(F, 0); 767 break; 768 case LibFunc_fscanf: 769 case LibFunc_fprintf: 770 Changed |= setRetAndArgsNoUndef(F); 771 Changed |= setDoesNotThrow(F); 772 Changed |= setDoesNotCapture(F, 0); 773 Changed |= setDoesNotCapture(F, 1); 774 Changed |= setOnlyReadsMemory(F, 1); 775 break; 776 case LibFunc_fgetpos: 777 Changed |= setRetAndArgsNoUndef(F); 778 Changed |= setDoesNotThrow(F); 779 Changed |= setDoesNotCapture(F, 0); 780 Changed |= setDoesNotCapture(F, 1); 781 break; 782 case LibFunc_getc: 783 Changed |= setRetAndArgsNoUndef(F); 784 Changed |= setDoesNotThrow(F); 785 Changed |= setDoesNotCapture(F, 0); 786 break; 787 case LibFunc_getlogin_r: 788 Changed |= setRetAndArgsNoUndef(F); 789 Changed |= setDoesNotThrow(F); 790 Changed |= setDoesNotCapture(F, 0); 791 break; 792 case LibFunc_getc_unlocked: 793 Changed |= setRetAndArgsNoUndef(F); 794 Changed |= setDoesNotThrow(F); 795 Changed |= setDoesNotCapture(F, 0); 796 break; 797 case LibFunc_getenv: 798 Changed |= setRetAndArgsNoUndef(F); 799 Changed |= setDoesNotThrow(F); 800 Changed |= setOnlyReadsMemory(F); 801 Changed |= setDoesNotCapture(F, 0); 802 break; 803 case LibFunc_gets: 804 case LibFunc_getchar: 805 case LibFunc_getchar_unlocked: 806 Changed |= setRetAndArgsNoUndef(F); 807 Changed |= setDoesNotThrow(F); 808 break; 809 case LibFunc_getitimer: 810 Changed |= setRetAndArgsNoUndef(F); 811 Changed |= setDoesNotThrow(F); 812 Changed |= setDoesNotCapture(F, 1); 813 break; 814 case LibFunc_getpwnam: 815 Changed |= setRetAndArgsNoUndef(F); 816 Changed |= setDoesNotThrow(F); 817 Changed |= setDoesNotCapture(F, 0); 818 Changed |= setOnlyReadsMemory(F, 0); 819 break; 820 case LibFunc_ungetc: 821 Changed |= setRetAndArgsNoUndef(F); 822 Changed |= setDoesNotThrow(F); 823 Changed |= setDoesNotCapture(F, 1); 824 break; 825 case LibFunc_uname: 826 Changed |= setRetAndArgsNoUndef(F); 827 Changed |= setDoesNotThrow(F); 828 Changed |= setDoesNotCapture(F, 0); 829 break; 830 case LibFunc_unlink: 831 Changed |= setRetAndArgsNoUndef(F); 832 Changed |= setDoesNotThrow(F); 833 Changed |= setDoesNotCapture(F, 0); 834 Changed |= setOnlyReadsMemory(F, 0); 835 break; 836 case LibFunc_unsetenv: 837 Changed |= setRetAndArgsNoUndef(F); 838 Changed |= setDoesNotThrow(F); 839 Changed |= setDoesNotCapture(F, 0); 840 Changed |= setOnlyReadsMemory(F, 0); 841 break; 842 case LibFunc_utime: 843 case LibFunc_utimes: 844 Changed |= setRetAndArgsNoUndef(F); 845 Changed |= setDoesNotThrow(F); 846 Changed |= setDoesNotCapture(F, 0); 847 Changed |= setDoesNotCapture(F, 1); 848 Changed |= setOnlyReadsMemory(F, 0); 849 Changed |= setOnlyReadsMemory(F, 1); 850 break; 851 case LibFunc_putc: 852 case LibFunc_putc_unlocked: 853 Changed |= setRetAndArgsNoUndef(F); 854 Changed |= setDoesNotThrow(F); 855 Changed |= setDoesNotCapture(F, 1); 856 break; 857 case LibFunc_puts: 858 case LibFunc_printf: 859 case LibFunc_perror: 860 Changed |= setRetAndArgsNoUndef(F); 861 Changed |= setDoesNotThrow(F); 862 Changed |= setDoesNotCapture(F, 0); 863 Changed |= setOnlyReadsMemory(F, 0); 864 break; 865 case LibFunc_pread: 866 // May throw; "pread" is a valid pthread cancellation point. 867 Changed |= setRetAndArgsNoUndef(F); 868 Changed |= setDoesNotCapture(F, 1); 869 break; 870 case LibFunc_pwrite: 871 // May throw; "pwrite" is a valid pthread cancellation point. 872 Changed |= setRetAndArgsNoUndef(F); 873 Changed |= setDoesNotCapture(F, 1); 874 Changed |= setOnlyReadsMemory(F, 1); 875 break; 876 case LibFunc_putchar: 877 case LibFunc_putchar_unlocked: 878 Changed |= setRetAndArgsNoUndef(F); 879 Changed |= setDoesNotThrow(F); 880 break; 881 case LibFunc_popen: 882 Changed |= setRetAndArgsNoUndef(F); 883 Changed |= setDoesNotThrow(F); 884 Changed |= setRetDoesNotAlias(F); 885 Changed |= setDoesNotCapture(F, 0); 886 Changed |= setDoesNotCapture(F, 1); 887 Changed |= setOnlyReadsMemory(F, 0); 888 Changed |= setOnlyReadsMemory(F, 1); 889 break; 890 case LibFunc_pclose: 891 Changed |= setRetAndArgsNoUndef(F); 892 Changed |= setDoesNotThrow(F); 893 Changed |= setDoesNotCapture(F, 0); 894 break; 895 case LibFunc_vscanf: 896 Changed |= setRetAndArgsNoUndef(F); 897 Changed |= setDoesNotThrow(F); 898 Changed |= setDoesNotCapture(F, 0); 899 Changed |= setOnlyReadsMemory(F, 0); 900 break; 901 case LibFunc_vsscanf: 902 Changed |= setRetAndArgsNoUndef(F); 903 Changed |= setDoesNotThrow(F); 904 Changed |= setDoesNotCapture(F, 0); 905 Changed |= setDoesNotCapture(F, 1); 906 Changed |= setOnlyReadsMemory(F, 0); 907 Changed |= setOnlyReadsMemory(F, 1); 908 break; 909 case LibFunc_vfscanf: 910 Changed |= setRetAndArgsNoUndef(F); 911 Changed |= setDoesNotThrow(F); 912 Changed |= setDoesNotCapture(F, 0); 913 Changed |= setDoesNotCapture(F, 1); 914 Changed |= setOnlyReadsMemory(F, 1); 915 break; 916 case LibFunc_vprintf: 917 Changed |= setRetAndArgsNoUndef(F); 918 Changed |= setDoesNotThrow(F); 919 Changed |= setDoesNotCapture(F, 0); 920 Changed |= setOnlyReadsMemory(F, 0); 921 break; 922 case LibFunc_vfprintf: 923 case LibFunc_vsprintf: 924 Changed |= setRetAndArgsNoUndef(F); 925 Changed |= setDoesNotThrow(F); 926 Changed |= setDoesNotCapture(F, 0); 927 Changed |= setDoesNotCapture(F, 1); 928 Changed |= setOnlyReadsMemory(F, 1); 929 break; 930 case LibFunc_vsnprintf: 931 Changed |= setRetAndArgsNoUndef(F); 932 Changed |= setDoesNotThrow(F); 933 Changed |= setDoesNotCapture(F, 0); 934 Changed |= setDoesNotCapture(F, 2); 935 Changed |= setOnlyReadsMemory(F, 2); 936 break; 937 case LibFunc_open: 938 // May throw; "open" is a valid pthread cancellation point. 939 Changed |= setRetAndArgsNoUndef(F); 940 Changed |= setDoesNotCapture(F, 0); 941 Changed |= setOnlyReadsMemory(F, 0); 942 break; 943 case LibFunc_opendir: 944 Changed |= setRetAndArgsNoUndef(F); 945 Changed |= setDoesNotThrow(F); 946 Changed |= setRetDoesNotAlias(F); 947 Changed |= setDoesNotCapture(F, 0); 948 Changed |= setOnlyReadsMemory(F, 0); 949 break; 950 case LibFunc_tmpfile: 951 Changed |= setRetAndArgsNoUndef(F); 952 Changed |= setDoesNotThrow(F); 953 Changed |= setRetDoesNotAlias(F); 954 break; 955 case LibFunc_times: 956 Changed |= setRetAndArgsNoUndef(F); 957 Changed |= setDoesNotThrow(F); 958 Changed |= setDoesNotCapture(F, 0); 959 break; 960 case LibFunc_htonl: 961 case LibFunc_htons: 962 case LibFunc_ntohl: 963 case LibFunc_ntohs: 964 Changed |= setDoesNotThrow(F); 965 Changed |= setDoesNotAccessMemory(F); 966 break; 967 case LibFunc_lstat: 968 Changed |= setRetAndArgsNoUndef(F); 969 Changed |= setDoesNotThrow(F); 970 Changed |= setDoesNotCapture(F, 0); 971 Changed |= setDoesNotCapture(F, 1); 972 Changed |= setOnlyReadsMemory(F, 0); 973 break; 974 case LibFunc_lchown: 975 Changed |= setRetAndArgsNoUndef(F); 976 Changed |= setDoesNotThrow(F); 977 Changed |= setDoesNotCapture(F, 0); 978 Changed |= setOnlyReadsMemory(F, 0); 979 break; 980 case LibFunc_qsort: 981 // May throw; places call through function pointer. 982 // Cannot give undef pointer/size 983 Changed |= setRetAndArgsNoUndef(F); 984 Changed |= setDoesNotCapture(F, 3); 985 break; 986 case LibFunc_dunder_strndup: 987 Changed |= setArgNoUndef(F, 1); 988 [[fallthrough]]; 989 case LibFunc_dunder_strdup: 990 Changed |= setDoesNotThrow(F); 991 Changed |= setRetDoesNotAlias(F); 992 Changed |= setWillReturn(F); 993 Changed |= setDoesNotCapture(F, 0); 994 Changed |= setOnlyReadsMemory(F, 0); 995 break; 996 case LibFunc_dunder_strtok_r: 997 Changed |= setDoesNotThrow(F); 998 Changed |= setDoesNotCapture(F, 1); 999 Changed |= setOnlyReadsMemory(F, 1); 1000 break; 1001 case LibFunc_under_IO_getc: 1002 Changed |= setRetAndArgsNoUndef(F); 1003 Changed |= setDoesNotThrow(F); 1004 Changed |= setDoesNotCapture(F, 0); 1005 break; 1006 case LibFunc_under_IO_putc: 1007 Changed |= setRetAndArgsNoUndef(F); 1008 Changed |= setDoesNotThrow(F); 1009 Changed |= setDoesNotCapture(F, 1); 1010 break; 1011 case LibFunc_dunder_isoc99_scanf: 1012 Changed |= setRetAndArgsNoUndef(F); 1013 Changed |= setDoesNotThrow(F); 1014 Changed |= setDoesNotCapture(F, 0); 1015 Changed |= setOnlyReadsMemory(F, 0); 1016 break; 1017 case LibFunc_stat64: 1018 case LibFunc_lstat64: 1019 case LibFunc_statvfs64: 1020 Changed |= setRetAndArgsNoUndef(F); 1021 Changed |= setDoesNotThrow(F); 1022 Changed |= setDoesNotCapture(F, 0); 1023 Changed |= setDoesNotCapture(F, 1); 1024 Changed |= setOnlyReadsMemory(F, 0); 1025 break; 1026 case LibFunc_dunder_isoc99_sscanf: 1027 Changed |= setRetAndArgsNoUndef(F); 1028 Changed |= setDoesNotThrow(F); 1029 Changed |= setDoesNotCapture(F, 0); 1030 Changed |= setDoesNotCapture(F, 1); 1031 Changed |= setOnlyReadsMemory(F, 0); 1032 Changed |= setOnlyReadsMemory(F, 1); 1033 break; 1034 case LibFunc_fopen64: 1035 Changed |= setRetAndArgsNoUndef(F); 1036 Changed |= setDoesNotThrow(F); 1037 Changed |= setRetDoesNotAlias(F); 1038 Changed |= setDoesNotCapture(F, 0); 1039 Changed |= setDoesNotCapture(F, 1); 1040 Changed |= setOnlyReadsMemory(F, 0); 1041 Changed |= setOnlyReadsMemory(F, 1); 1042 break; 1043 case LibFunc_fseeko64: 1044 case LibFunc_ftello64: 1045 Changed |= setRetAndArgsNoUndef(F); 1046 Changed |= setDoesNotThrow(F); 1047 Changed |= setDoesNotCapture(F, 0); 1048 break; 1049 case LibFunc_tmpfile64: 1050 Changed |= setRetAndArgsNoUndef(F); 1051 Changed |= setDoesNotThrow(F); 1052 Changed |= setRetDoesNotAlias(F); 1053 break; 1054 case LibFunc_fstat64: 1055 case LibFunc_fstatvfs64: 1056 Changed |= setRetAndArgsNoUndef(F); 1057 Changed |= setDoesNotThrow(F); 1058 Changed |= setDoesNotCapture(F, 1); 1059 break; 1060 case LibFunc_open64: 1061 // May throw; "open" is a valid pthread cancellation point. 1062 Changed |= setRetAndArgsNoUndef(F); 1063 Changed |= setDoesNotCapture(F, 0); 1064 Changed |= setOnlyReadsMemory(F, 0); 1065 break; 1066 case LibFunc_gettimeofday: 1067 // Currently some platforms have the restrict keyword on the arguments to 1068 // gettimeofday. To be conservative, do not add noalias to gettimeofday's 1069 // arguments. 1070 Changed |= setRetAndArgsNoUndef(F); 1071 Changed |= setDoesNotThrow(F); 1072 Changed |= setDoesNotCapture(F, 0); 1073 Changed |= setDoesNotCapture(F, 1); 1074 break; 1075 case LibFunc_memset_pattern4: 1076 case LibFunc_memset_pattern8: 1077 case LibFunc_memset_pattern16: 1078 Changed |= setDoesNotCapture(F, 0); 1079 Changed |= setDoesNotCapture(F, 1); 1080 Changed |= setOnlyReadsMemory(F, 1); 1081 [[fallthrough]]; 1082 case LibFunc_memset: 1083 Changed |= setWillReturn(F); 1084 [[fallthrough]]; 1085 case LibFunc_memset_chk: 1086 Changed |= setOnlyAccessesArgMemory(F); 1087 Changed |= setOnlyWritesMemory(F, 0); 1088 Changed |= setDoesNotThrow(F); 1089 break; 1090 // int __nvvm_reflect(const char *) 1091 case LibFunc_nvvm_reflect: 1092 Changed |= setRetAndArgsNoUndef(F); 1093 Changed |= setDoesNotAccessMemory(F); 1094 Changed |= setDoesNotThrow(F); 1095 break; 1096 case LibFunc_ldexp: 1097 case LibFunc_ldexpf: 1098 case LibFunc_ldexpl: 1099 Changed |= setWillReturn(F); 1100 break; 1101 case LibFunc_abs: 1102 case LibFunc_acos: 1103 case LibFunc_acosf: 1104 case LibFunc_acosh: 1105 case LibFunc_acoshf: 1106 case LibFunc_acoshl: 1107 case LibFunc_acosl: 1108 case LibFunc_asin: 1109 case LibFunc_asinf: 1110 case LibFunc_asinh: 1111 case LibFunc_asinhf: 1112 case LibFunc_asinhl: 1113 case LibFunc_asinl: 1114 case LibFunc_atan: 1115 case LibFunc_atan2: 1116 case LibFunc_atan2f: 1117 case LibFunc_atan2l: 1118 case LibFunc_atanf: 1119 case LibFunc_atanh: 1120 case LibFunc_atanhf: 1121 case LibFunc_atanhl: 1122 case LibFunc_atanl: 1123 case LibFunc_cbrt: 1124 case LibFunc_cbrtf: 1125 case LibFunc_cbrtl: 1126 case LibFunc_ceil: 1127 case LibFunc_ceilf: 1128 case LibFunc_ceill: 1129 case LibFunc_copysign: 1130 case LibFunc_copysignf: 1131 case LibFunc_copysignl: 1132 case LibFunc_cos: 1133 case LibFunc_cosh: 1134 case LibFunc_coshf: 1135 case LibFunc_coshl: 1136 case LibFunc_cosf: 1137 case LibFunc_cosl: 1138 case LibFunc_cospi: 1139 case LibFunc_cospif: 1140 case LibFunc_erf: 1141 case LibFunc_erff: 1142 case LibFunc_erfl: 1143 case LibFunc_exp: 1144 case LibFunc_expf: 1145 case LibFunc_expl: 1146 case LibFunc_exp2: 1147 case LibFunc_exp2f: 1148 case LibFunc_exp2l: 1149 case LibFunc_expm1: 1150 case LibFunc_expm1f: 1151 case LibFunc_expm1l: 1152 case LibFunc_fabs: 1153 case LibFunc_fabsf: 1154 case LibFunc_fabsl: 1155 case LibFunc_ffs: 1156 case LibFunc_ffsl: 1157 case LibFunc_ffsll: 1158 case LibFunc_floor: 1159 case LibFunc_floorf: 1160 case LibFunc_floorl: 1161 case LibFunc_fls: 1162 case LibFunc_flsl: 1163 case LibFunc_flsll: 1164 case LibFunc_fmax: 1165 case LibFunc_fmaxf: 1166 case LibFunc_fmaxl: 1167 case LibFunc_fmin: 1168 case LibFunc_fminf: 1169 case LibFunc_fminl: 1170 case LibFunc_fmod: 1171 case LibFunc_fmodf: 1172 case LibFunc_fmodl: 1173 case LibFunc_isascii: 1174 case LibFunc_isdigit: 1175 case LibFunc_labs: 1176 case LibFunc_llabs: 1177 case LibFunc_log: 1178 case LibFunc_log10: 1179 case LibFunc_log10f: 1180 case LibFunc_log10l: 1181 case LibFunc_log1p: 1182 case LibFunc_log1pf: 1183 case LibFunc_log1pl: 1184 case LibFunc_log2: 1185 case LibFunc_log2f: 1186 case LibFunc_log2l: 1187 case LibFunc_logb: 1188 case LibFunc_logbf: 1189 case LibFunc_logbl: 1190 case LibFunc_logf: 1191 case LibFunc_logl: 1192 case LibFunc_nearbyint: 1193 case LibFunc_nearbyintf: 1194 case LibFunc_nearbyintl: 1195 case LibFunc_pow: 1196 case LibFunc_powf: 1197 case LibFunc_powl: 1198 case LibFunc_rint: 1199 case LibFunc_rintf: 1200 case LibFunc_rintl: 1201 case LibFunc_round: 1202 case LibFunc_roundf: 1203 case LibFunc_roundl: 1204 case LibFunc_sin: 1205 case LibFunc_sincospif_stret: 1206 case LibFunc_sinf: 1207 case LibFunc_sinh: 1208 case LibFunc_sinhf: 1209 case LibFunc_sinhl: 1210 case LibFunc_sinl: 1211 case LibFunc_sinpi: 1212 case LibFunc_sinpif: 1213 case LibFunc_sqrt: 1214 case LibFunc_sqrtf: 1215 case LibFunc_sqrtl: 1216 case LibFunc_tan: 1217 case LibFunc_tanf: 1218 case LibFunc_tanh: 1219 case LibFunc_tanhf: 1220 case LibFunc_tanhl: 1221 case LibFunc_tanl: 1222 case LibFunc_toascii: 1223 case LibFunc_trunc: 1224 case LibFunc_truncf: 1225 case LibFunc_truncl: 1226 Changed |= setDoesNotThrow(F); 1227 Changed |= setDoesNotFreeMemory(F); 1228 Changed |= setOnlyWritesMemory(F); 1229 Changed |= setWillReturn(F); 1230 break; 1231 default: 1232 // FIXME: It'd be really nice to cover all the library functions we're 1233 // aware of here. 1234 break; 1235 } 1236 // We have to do this step after AllocKind has been inferred on functions so 1237 // we can reliably identify free-like and realloc-like functions. 1238 if (!isLibFreeFunction(&F, TheLibFunc) && !isReallocLikeFn(&F)) 1239 Changed |= setDoesNotFreeMemory(F); 1240 return Changed; 1241 } 1242 1243 static void setArgExtAttr(Function &F, unsigned ArgNo, 1244 const TargetLibraryInfo &TLI, bool Signed = true) { 1245 Attribute::AttrKind ExtAttr = TLI.getExtAttrForI32Param(Signed); 1246 if (ExtAttr != Attribute::None && !F.hasParamAttribute(ArgNo, ExtAttr)) 1247 F.addParamAttr(ArgNo, ExtAttr); 1248 } 1249 1250 static void setRetExtAttr(Function &F, 1251 const TargetLibraryInfo &TLI, bool Signed = true) { 1252 Attribute::AttrKind ExtAttr = TLI.getExtAttrForI32Return(Signed); 1253 if (ExtAttr != Attribute::None && !F.hasRetAttribute(ExtAttr)) 1254 F.addRetAttr(ExtAttr); 1255 } 1256 1257 // Modeled after X86TargetLowering::markLibCallAttributes. 1258 static void markRegisterParameterAttributes(Function *F) { 1259 if (!F->arg_size() || F->isVarArg()) 1260 return; 1261 1262 const CallingConv::ID CC = F->getCallingConv(); 1263 if (CC != CallingConv::C && CC != CallingConv::X86_StdCall) 1264 return; 1265 1266 const Module *M = F->getParent(); 1267 unsigned N = M->getNumberRegisterParameters(); 1268 if (!N) 1269 return; 1270 1271 const DataLayout &DL = M->getDataLayout(); 1272 1273 for (Argument &A : F->args()) { 1274 Type *T = A.getType(); 1275 if (!T->isIntOrPtrTy()) 1276 continue; 1277 1278 const TypeSize &TS = DL.getTypeAllocSize(T); 1279 if (TS > 8) 1280 continue; 1281 1282 assert(TS <= 4 && "Need to account for parameters larger than word size"); 1283 const unsigned NumRegs = TS > 4 ? 2 : 1; 1284 if (N < NumRegs) 1285 return; 1286 1287 N -= NumRegs; 1288 F->addParamAttr(A.getArgNo(), Attribute::InReg); 1289 } 1290 } 1291 1292 FunctionCallee llvm::getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI, 1293 LibFunc TheLibFunc, FunctionType *T, 1294 AttributeList AttributeList) { 1295 assert(TLI.has(TheLibFunc) && 1296 "Creating call to non-existing library function."); 1297 StringRef Name = TLI.getName(TheLibFunc); 1298 FunctionCallee C = M->getOrInsertFunction(Name, T, AttributeList); 1299 1300 // Make sure any mandatory argument attributes are added. 1301 1302 // Any outgoing i32 argument should be handled with setArgExtAttr() which 1303 // will add an extension attribute if the target ABI requires it. Adding 1304 // argument extensions is typically done by the front end but when an 1305 // optimizer is building a library call on its own it has to take care of 1306 // this. Each such generated function must be handled here with sign or 1307 // zero extensions as needed. F is retreived with cast<> because we demand 1308 // of the caller to have called isLibFuncEmittable() first. 1309 Function *F = cast<Function>(C.getCallee()); 1310 assert(F->getFunctionType() == T && "Function type does not match."); 1311 switch (TheLibFunc) { 1312 case LibFunc_fputc: 1313 case LibFunc_putchar: 1314 setArgExtAttr(*F, 0, TLI); 1315 break; 1316 case LibFunc_ldexp: 1317 case LibFunc_ldexpf: 1318 case LibFunc_ldexpl: 1319 case LibFunc_memchr: 1320 case LibFunc_memrchr: 1321 case LibFunc_strchr: 1322 setArgExtAttr(*F, 1, TLI); 1323 break; 1324 case LibFunc_memccpy: 1325 setArgExtAttr(*F, 2, TLI); 1326 break; 1327 1328 // These are functions that are known to not need any argument extension 1329 // on any target: A size_t argument (which may be an i32 on some targets) 1330 // should not trigger the assert below. 1331 case LibFunc_bcmp: 1332 setRetExtAttr(*F, TLI); 1333 break; 1334 case LibFunc_calloc: 1335 case LibFunc_fwrite: 1336 case LibFunc_malloc: 1337 case LibFunc_memcmp: 1338 case LibFunc_memcpy_chk: 1339 case LibFunc_mempcpy: 1340 case LibFunc_memset_pattern16: 1341 case LibFunc_snprintf: 1342 case LibFunc_stpncpy: 1343 case LibFunc_strlcat: 1344 case LibFunc_strlcpy: 1345 case LibFunc_strncat: 1346 case LibFunc_strncmp: 1347 case LibFunc_strncpy: 1348 case LibFunc_vsnprintf: 1349 break; 1350 1351 default: 1352 #ifndef NDEBUG 1353 for (unsigned i = 0; i < T->getNumParams(); i++) 1354 assert(!isa<IntegerType>(T->getParamType(i)) && 1355 "Unhandled integer argument."); 1356 #endif 1357 break; 1358 } 1359 1360 markRegisterParameterAttributes(F); 1361 1362 return C; 1363 } 1364 1365 FunctionCallee llvm::getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI, 1366 LibFunc TheLibFunc, FunctionType *T) { 1367 return getOrInsertLibFunc(M, TLI, TheLibFunc, T, AttributeList()); 1368 } 1369 1370 bool llvm::isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI, 1371 LibFunc TheLibFunc) { 1372 StringRef FuncName = TLI->getName(TheLibFunc); 1373 if (!TLI->has(TheLibFunc)) 1374 return false; 1375 1376 // Check if the Module already has a GlobalValue with the same name, in 1377 // which case it must be a Function with the expected type. 1378 if (GlobalValue *GV = M->getNamedValue(FuncName)) { 1379 if (auto *F = dyn_cast<Function>(GV)) 1380 return TLI->isValidProtoForLibFunc(*F->getFunctionType(), TheLibFunc, *M); 1381 return false; 1382 } 1383 1384 return true; 1385 } 1386 1387 bool llvm::isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI, 1388 StringRef Name) { 1389 LibFunc TheLibFunc; 1390 return TLI->getLibFunc(Name, TheLibFunc) && 1391 isLibFuncEmittable(M, TLI, TheLibFunc); 1392 } 1393 1394 bool llvm::hasFloatFn(const Module *M, const TargetLibraryInfo *TLI, Type *Ty, 1395 LibFunc DoubleFn, LibFunc FloatFn, LibFunc LongDoubleFn) { 1396 switch (Ty->getTypeID()) { 1397 case Type::HalfTyID: 1398 return false; 1399 case Type::FloatTyID: 1400 return isLibFuncEmittable(M, TLI, FloatFn); 1401 case Type::DoubleTyID: 1402 return isLibFuncEmittable(M, TLI, DoubleFn); 1403 default: 1404 return isLibFuncEmittable(M, TLI, LongDoubleFn); 1405 } 1406 } 1407 1408 StringRef llvm::getFloatFn(const Module *M, const TargetLibraryInfo *TLI, 1409 Type *Ty, LibFunc DoubleFn, LibFunc FloatFn, 1410 LibFunc LongDoubleFn, LibFunc &TheLibFunc) { 1411 assert(hasFloatFn(M, TLI, Ty, DoubleFn, FloatFn, LongDoubleFn) && 1412 "Cannot get name for unavailable function!"); 1413 1414 switch (Ty->getTypeID()) { 1415 case Type::HalfTyID: 1416 llvm_unreachable("No name for HalfTy!"); 1417 case Type::FloatTyID: 1418 TheLibFunc = FloatFn; 1419 return TLI->getName(FloatFn); 1420 case Type::DoubleTyID: 1421 TheLibFunc = DoubleFn; 1422 return TLI->getName(DoubleFn); 1423 default: 1424 TheLibFunc = LongDoubleFn; 1425 return TLI->getName(LongDoubleFn); 1426 } 1427 } 1428 1429 //- Emit LibCalls ------------------------------------------------------------// 1430 1431 static IntegerType *getIntTy(IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1432 return B.getIntNTy(TLI->getIntSize()); 1433 } 1434 1435 static IntegerType *getSizeTTy(IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1436 const Module *M = B.GetInsertBlock()->getModule(); 1437 return B.getIntNTy(TLI->getSizeTSize(*M)); 1438 } 1439 1440 static Value *emitLibCall(LibFunc TheLibFunc, Type *ReturnType, 1441 ArrayRef<Type *> ParamTypes, 1442 ArrayRef<Value *> Operands, IRBuilderBase &B, 1443 const TargetLibraryInfo *TLI, 1444 bool IsVaArgs = false) { 1445 Module *M = B.GetInsertBlock()->getModule(); 1446 if (!isLibFuncEmittable(M, TLI, TheLibFunc)) 1447 return nullptr; 1448 1449 StringRef FuncName = TLI->getName(TheLibFunc); 1450 FunctionType *FuncType = FunctionType::get(ReturnType, ParamTypes, IsVaArgs); 1451 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, FuncType); 1452 inferNonMandatoryLibFuncAttrs(M, FuncName, *TLI); 1453 CallInst *CI = B.CreateCall(Callee, Operands, FuncName); 1454 if (const Function *F = 1455 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1456 CI->setCallingConv(F->getCallingConv()); 1457 return CI; 1458 } 1459 1460 Value *llvm::emitStrLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL, 1461 const TargetLibraryInfo *TLI) { 1462 Type *CharPtrTy = B.getPtrTy(); 1463 Type *SizeTTy = getSizeTTy(B, TLI); 1464 return emitLibCall(LibFunc_strlen, SizeTTy, CharPtrTy, Ptr, B, TLI); 1465 } 1466 1467 Value *llvm::emitStrDup(Value *Ptr, IRBuilderBase &B, 1468 const TargetLibraryInfo *TLI) { 1469 Type *CharPtrTy = B.getPtrTy(); 1470 return emitLibCall(LibFunc_strdup, CharPtrTy, CharPtrTy, Ptr, B, TLI); 1471 } 1472 1473 Value *llvm::emitStrChr(Value *Ptr, char C, IRBuilderBase &B, 1474 const TargetLibraryInfo *TLI) { 1475 Type *CharPtrTy = B.getPtrTy(); 1476 Type *IntTy = getIntTy(B, TLI); 1477 return emitLibCall(LibFunc_strchr, CharPtrTy, {CharPtrTy, IntTy}, 1478 {Ptr, ConstantInt::get(IntTy, C)}, B, TLI); 1479 } 1480 1481 Value *llvm::emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1482 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1483 Type *CharPtrTy = B.getPtrTy(); 1484 Type *IntTy = getIntTy(B, TLI); 1485 Type *SizeTTy = getSizeTTy(B, TLI); 1486 return emitLibCall( 1487 LibFunc_strncmp, IntTy, 1488 {CharPtrTy, CharPtrTy, SizeTTy}, 1489 {Ptr1, Ptr2, Len}, B, TLI); 1490 } 1491 1492 Value *llvm::emitStrCpy(Value *Dst, Value *Src, IRBuilderBase &B, 1493 const TargetLibraryInfo *TLI) { 1494 Type *CharPtrTy = Dst->getType(); 1495 return emitLibCall(LibFunc_strcpy, CharPtrTy, {CharPtrTy, CharPtrTy}, 1496 {Dst, Src}, B, TLI); 1497 } 1498 1499 Value *llvm::emitStpCpy(Value *Dst, Value *Src, IRBuilderBase &B, 1500 const TargetLibraryInfo *TLI) { 1501 Type *CharPtrTy = B.getPtrTy(); 1502 return emitLibCall(LibFunc_stpcpy, CharPtrTy, {CharPtrTy, CharPtrTy}, 1503 {Dst, Src}, B, TLI); 1504 } 1505 1506 Value *llvm::emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1507 const TargetLibraryInfo *TLI) { 1508 Type *CharPtrTy = B.getPtrTy(); 1509 Type *SizeTTy = getSizeTTy(B, TLI); 1510 return emitLibCall(LibFunc_strncpy, CharPtrTy, {CharPtrTy, CharPtrTy, SizeTTy}, 1511 {Dst, Src, Len}, B, TLI); 1512 } 1513 1514 Value *llvm::emitStpNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1515 const TargetLibraryInfo *TLI) { 1516 Type *CharPtrTy = B.getPtrTy(); 1517 Type *SizeTTy = getSizeTTy(B, TLI); 1518 return emitLibCall(LibFunc_stpncpy, CharPtrTy, {CharPtrTy, CharPtrTy, SizeTTy}, 1519 {Dst, Src, Len}, B, TLI); 1520 } 1521 1522 Value *llvm::emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize, 1523 IRBuilderBase &B, const DataLayout &DL, 1524 const TargetLibraryInfo *TLI) { 1525 Module *M = B.GetInsertBlock()->getModule(); 1526 if (!isLibFuncEmittable(M, TLI, LibFunc_memcpy_chk)) 1527 return nullptr; 1528 1529 AttributeList AS; 1530 AS = AttributeList::get(M->getContext(), AttributeList::FunctionIndex, 1531 Attribute::NoUnwind); 1532 Type *VoidPtrTy = B.getPtrTy(); 1533 Type *SizeTTy = getSizeTTy(B, TLI); 1534 FunctionCallee MemCpy = getOrInsertLibFunc(M, *TLI, LibFunc_memcpy_chk, 1535 AttributeList::get(M->getContext(), AS), VoidPtrTy, 1536 VoidPtrTy, VoidPtrTy, SizeTTy, SizeTTy); 1537 CallInst *CI = B.CreateCall(MemCpy, {Dst, Src, Len, ObjSize}); 1538 if (const Function *F = 1539 dyn_cast<Function>(MemCpy.getCallee()->stripPointerCasts())) 1540 CI->setCallingConv(F->getCallingConv()); 1541 return CI; 1542 } 1543 1544 Value *llvm::emitMemPCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1545 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1546 Type *VoidPtrTy = B.getPtrTy(); 1547 Type *SizeTTy = getSizeTTy(B, TLI); 1548 return emitLibCall(LibFunc_mempcpy, VoidPtrTy, 1549 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1550 {Dst, Src, Len}, B, TLI); 1551 } 1552 1553 Value *llvm::emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B, 1554 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1555 Type *VoidPtrTy = B.getPtrTy(); 1556 Type *IntTy = getIntTy(B, TLI); 1557 Type *SizeTTy = getSizeTTy(B, TLI); 1558 return emitLibCall(LibFunc_memchr, VoidPtrTy, 1559 {VoidPtrTy, IntTy, SizeTTy}, 1560 {Ptr, Val, Len}, B, TLI); 1561 } 1562 1563 Value *llvm::emitMemRChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B, 1564 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1565 Type *VoidPtrTy = B.getPtrTy(); 1566 Type *IntTy = getIntTy(B, TLI); 1567 Type *SizeTTy = getSizeTTy(B, TLI); 1568 return emitLibCall(LibFunc_memrchr, VoidPtrTy, 1569 {VoidPtrTy, IntTy, SizeTTy}, 1570 {Ptr, Val, Len}, B, TLI); 1571 } 1572 1573 Value *llvm::emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1574 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1575 Type *VoidPtrTy = B.getPtrTy(); 1576 Type *IntTy = getIntTy(B, TLI); 1577 Type *SizeTTy = getSizeTTy(B, TLI); 1578 return emitLibCall(LibFunc_memcmp, IntTy, 1579 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1580 {Ptr1, Ptr2, Len}, B, TLI); 1581 } 1582 1583 Value *llvm::emitBCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1584 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1585 Type *VoidPtrTy = B.getPtrTy(); 1586 Type *IntTy = getIntTy(B, TLI); 1587 Type *SizeTTy = getSizeTTy(B, TLI); 1588 return emitLibCall(LibFunc_bcmp, IntTy, 1589 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1590 {Ptr1, Ptr2, Len}, B, TLI); 1591 } 1592 1593 Value *llvm::emitMemCCpy(Value *Ptr1, Value *Ptr2, Value *Val, Value *Len, 1594 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1595 Type *VoidPtrTy = B.getPtrTy(); 1596 Type *IntTy = getIntTy(B, TLI); 1597 Type *SizeTTy = getSizeTTy(B, TLI); 1598 return emitLibCall(LibFunc_memccpy, VoidPtrTy, 1599 {VoidPtrTy, VoidPtrTy, IntTy, SizeTTy}, 1600 {Ptr1, Ptr2, Val, Len}, B, TLI); 1601 } 1602 1603 Value *llvm::emitSNPrintf(Value *Dest, Value *Size, Value *Fmt, 1604 ArrayRef<Value *> VariadicArgs, IRBuilderBase &B, 1605 const TargetLibraryInfo *TLI) { 1606 Type *CharPtrTy = B.getPtrTy(); 1607 Type *IntTy = getIntTy(B, TLI); 1608 Type *SizeTTy = getSizeTTy(B, TLI); 1609 SmallVector<Value *, 8> Args{Dest, Size, Fmt}; 1610 llvm::append_range(Args, VariadicArgs); 1611 return emitLibCall(LibFunc_snprintf, IntTy, 1612 {CharPtrTy, SizeTTy, CharPtrTy}, 1613 Args, B, TLI, /*IsVaArgs=*/true); 1614 } 1615 1616 Value *llvm::emitSPrintf(Value *Dest, Value *Fmt, 1617 ArrayRef<Value *> VariadicArgs, IRBuilderBase &B, 1618 const TargetLibraryInfo *TLI) { 1619 Type *CharPtrTy = B.getPtrTy(); 1620 Type *IntTy = getIntTy(B, TLI); 1621 SmallVector<Value *, 8> Args{Dest, Fmt}; 1622 llvm::append_range(Args, VariadicArgs); 1623 return emitLibCall(LibFunc_sprintf, IntTy, 1624 {CharPtrTy, CharPtrTy}, Args, B, TLI, 1625 /*IsVaArgs=*/true); 1626 } 1627 1628 Value *llvm::emitStrCat(Value *Dest, Value *Src, IRBuilderBase &B, 1629 const TargetLibraryInfo *TLI) { 1630 Type *CharPtrTy = B.getPtrTy(); 1631 return emitLibCall(LibFunc_strcat, CharPtrTy, 1632 {CharPtrTy, CharPtrTy}, 1633 {Dest, Src}, B, TLI); 1634 } 1635 1636 Value *llvm::emitStrLCpy(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1637 const TargetLibraryInfo *TLI) { 1638 Type *CharPtrTy = B.getPtrTy(); 1639 Type *SizeTTy = getSizeTTy(B, TLI); 1640 return emitLibCall(LibFunc_strlcpy, SizeTTy, 1641 {CharPtrTy, CharPtrTy, SizeTTy}, 1642 {Dest, Src, Size}, B, TLI); 1643 } 1644 1645 Value *llvm::emitStrLCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1646 const TargetLibraryInfo *TLI) { 1647 Type *CharPtrTy = B.getPtrTy(); 1648 Type *SizeTTy = getSizeTTy(B, TLI); 1649 return emitLibCall(LibFunc_strlcat, SizeTTy, 1650 {CharPtrTy, CharPtrTy, SizeTTy}, 1651 {Dest, Src, Size}, B, TLI); 1652 } 1653 1654 Value *llvm::emitStrNCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1655 const TargetLibraryInfo *TLI) { 1656 Type *CharPtrTy = B.getPtrTy(); 1657 Type *SizeTTy = getSizeTTy(B, TLI); 1658 return emitLibCall(LibFunc_strncat, CharPtrTy, 1659 {CharPtrTy, CharPtrTy, SizeTTy}, 1660 {Dest, Src, Size}, B, TLI); 1661 } 1662 1663 Value *llvm::emitVSNPrintf(Value *Dest, Value *Size, Value *Fmt, Value *VAList, 1664 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1665 Type *CharPtrTy = B.getPtrTy(); 1666 Type *IntTy = getIntTy(B, TLI); 1667 Type *SizeTTy = getSizeTTy(B, TLI); 1668 return emitLibCall( 1669 LibFunc_vsnprintf, IntTy, 1670 {CharPtrTy, SizeTTy, CharPtrTy, VAList->getType()}, 1671 {Dest, Size, Fmt, VAList}, B, TLI); 1672 } 1673 1674 Value *llvm::emitVSPrintf(Value *Dest, Value *Fmt, Value *VAList, 1675 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1676 Type *CharPtrTy = B.getPtrTy(); 1677 Type *IntTy = getIntTy(B, TLI); 1678 return emitLibCall(LibFunc_vsprintf, IntTy, 1679 {CharPtrTy, CharPtrTy, VAList->getType()}, 1680 {Dest, Fmt, VAList}, B, TLI); 1681 } 1682 1683 /// Append a suffix to the function name according to the type of 'Op'. 1684 static void appendTypeSuffix(Value *Op, StringRef &Name, 1685 SmallString<20> &NameBuffer) { 1686 if (!Op->getType()->isDoubleTy()) { 1687 NameBuffer += Name; 1688 1689 if (Op->getType()->isFloatTy()) 1690 NameBuffer += 'f'; 1691 else 1692 NameBuffer += 'l'; 1693 1694 Name = NameBuffer; 1695 } 1696 } 1697 1698 static Value *emitUnaryFloatFnCallHelper(Value *Op, LibFunc TheLibFunc, 1699 StringRef Name, IRBuilderBase &B, 1700 const AttributeList &Attrs, 1701 const TargetLibraryInfo *TLI) { 1702 assert((Name != "") && "Must specify Name to emitUnaryFloatFnCall"); 1703 1704 Module *M = B.GetInsertBlock()->getModule(); 1705 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, Op->getType(), 1706 Op->getType()); 1707 CallInst *CI = B.CreateCall(Callee, Op, Name); 1708 1709 // The incoming attribute set may have come from a speculatable intrinsic, but 1710 // is being replaced with a library call which is not allowed to be 1711 // speculatable. 1712 CI->setAttributes( 1713 Attrs.removeFnAttribute(B.getContext(), Attribute::Speculatable)); 1714 if (const Function *F = 1715 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1716 CI->setCallingConv(F->getCallingConv()); 1717 1718 return CI; 1719 } 1720 1721 Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI, 1722 StringRef Name, IRBuilderBase &B, 1723 const AttributeList &Attrs) { 1724 SmallString<20> NameBuffer; 1725 appendTypeSuffix(Op, Name, NameBuffer); 1726 1727 LibFunc TheLibFunc; 1728 TLI->getLibFunc(Name, TheLibFunc); 1729 1730 return emitUnaryFloatFnCallHelper(Op, TheLibFunc, Name, B, Attrs, TLI); 1731 } 1732 1733 Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI, 1734 LibFunc DoubleFn, LibFunc FloatFn, 1735 LibFunc LongDoubleFn, IRBuilderBase &B, 1736 const AttributeList &Attrs) { 1737 // Get the name of the function according to TLI. 1738 Module *M = B.GetInsertBlock()->getModule(); 1739 LibFunc TheLibFunc; 1740 StringRef Name = getFloatFn(M, TLI, Op->getType(), DoubleFn, FloatFn, 1741 LongDoubleFn, TheLibFunc); 1742 1743 return emitUnaryFloatFnCallHelper(Op, TheLibFunc, Name, B, Attrs, TLI); 1744 } 1745 1746 static Value *emitBinaryFloatFnCallHelper(Value *Op1, Value *Op2, 1747 LibFunc TheLibFunc, 1748 StringRef Name, IRBuilderBase &B, 1749 const AttributeList &Attrs, 1750 const TargetLibraryInfo *TLI) { 1751 assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall"); 1752 1753 Module *M = B.GetInsertBlock()->getModule(); 1754 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, Op1->getType(), 1755 Op1->getType(), Op2->getType()); 1756 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1757 CallInst *CI = B.CreateCall(Callee, { Op1, Op2 }, Name); 1758 1759 // The incoming attribute set may have come from a speculatable intrinsic, but 1760 // is being replaced with a library call which is not allowed to be 1761 // speculatable. 1762 CI->setAttributes( 1763 Attrs.removeFnAttribute(B.getContext(), Attribute::Speculatable)); 1764 if (const Function *F = 1765 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1766 CI->setCallingConv(F->getCallingConv()); 1767 1768 return CI; 1769 } 1770 1771 Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, 1772 const TargetLibraryInfo *TLI, 1773 StringRef Name, IRBuilderBase &B, 1774 const AttributeList &Attrs) { 1775 assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall"); 1776 1777 SmallString<20> NameBuffer; 1778 appendTypeSuffix(Op1, Name, NameBuffer); 1779 1780 LibFunc TheLibFunc; 1781 TLI->getLibFunc(Name, TheLibFunc); 1782 1783 return emitBinaryFloatFnCallHelper(Op1, Op2, TheLibFunc, Name, B, Attrs, TLI); 1784 } 1785 1786 Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, 1787 const TargetLibraryInfo *TLI, 1788 LibFunc DoubleFn, LibFunc FloatFn, 1789 LibFunc LongDoubleFn, IRBuilderBase &B, 1790 const AttributeList &Attrs) { 1791 // Get the name of the function according to TLI. 1792 Module *M = B.GetInsertBlock()->getModule(); 1793 LibFunc TheLibFunc; 1794 StringRef Name = getFloatFn(M, TLI, Op1->getType(), DoubleFn, FloatFn, 1795 LongDoubleFn, TheLibFunc); 1796 1797 return emitBinaryFloatFnCallHelper(Op1, Op2, TheLibFunc, Name, B, Attrs, TLI); 1798 } 1799 1800 // Emit a call to putchar(int) with Char as the argument. Char must have 1801 // the same precision as int, which need not be 32 bits. 1802 Value *llvm::emitPutChar(Value *Char, IRBuilderBase &B, 1803 const TargetLibraryInfo *TLI) { 1804 Module *M = B.GetInsertBlock()->getModule(); 1805 if (!isLibFuncEmittable(M, TLI, LibFunc_putchar)) 1806 return nullptr; 1807 1808 Type *IntTy = getIntTy(B, TLI); 1809 StringRef PutCharName = TLI->getName(LibFunc_putchar); 1810 FunctionCallee PutChar = getOrInsertLibFunc(M, *TLI, LibFunc_putchar, 1811 IntTy, IntTy); 1812 inferNonMandatoryLibFuncAttrs(M, PutCharName, *TLI); 1813 CallInst *CI = B.CreateCall(PutChar, Char, PutCharName); 1814 1815 if (const Function *F = 1816 dyn_cast<Function>(PutChar.getCallee()->stripPointerCasts())) 1817 CI->setCallingConv(F->getCallingConv()); 1818 return CI; 1819 } 1820 1821 Value *llvm::emitPutS(Value *Str, IRBuilderBase &B, 1822 const TargetLibraryInfo *TLI) { 1823 Module *M = B.GetInsertBlock()->getModule(); 1824 if (!isLibFuncEmittable(M, TLI, LibFunc_puts)) 1825 return nullptr; 1826 1827 Type *IntTy = getIntTy(B, TLI); 1828 StringRef PutsName = TLI->getName(LibFunc_puts); 1829 FunctionCallee PutS = getOrInsertLibFunc(M, *TLI, LibFunc_puts, IntTy, 1830 B.getPtrTy()); 1831 inferNonMandatoryLibFuncAttrs(M, PutsName, *TLI); 1832 CallInst *CI = B.CreateCall(PutS, Str, PutsName); 1833 if (const Function *F = 1834 dyn_cast<Function>(PutS.getCallee()->stripPointerCasts())) 1835 CI->setCallingConv(F->getCallingConv()); 1836 return CI; 1837 } 1838 1839 Value *llvm::emitFPutC(Value *Char, Value *File, IRBuilderBase &B, 1840 const TargetLibraryInfo *TLI) { 1841 Module *M = B.GetInsertBlock()->getModule(); 1842 if (!isLibFuncEmittable(M, TLI, LibFunc_fputc)) 1843 return nullptr; 1844 1845 Type *IntTy = getIntTy(B, TLI); 1846 StringRef FPutcName = TLI->getName(LibFunc_fputc); 1847 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fputc, IntTy, 1848 IntTy, File->getType()); 1849 if (File->getType()->isPointerTy()) 1850 inferNonMandatoryLibFuncAttrs(M, FPutcName, *TLI); 1851 CallInst *CI = B.CreateCall(F, {Char, File}, FPutcName); 1852 1853 if (const Function *Fn = 1854 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1855 CI->setCallingConv(Fn->getCallingConv()); 1856 return CI; 1857 } 1858 1859 Value *llvm::emitFPutS(Value *Str, Value *File, IRBuilderBase &B, 1860 const TargetLibraryInfo *TLI) { 1861 Module *M = B.GetInsertBlock()->getModule(); 1862 if (!isLibFuncEmittable(M, TLI, LibFunc_fputs)) 1863 return nullptr; 1864 1865 Type *IntTy = getIntTy(B, TLI); 1866 StringRef FPutsName = TLI->getName(LibFunc_fputs); 1867 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fputs, IntTy, 1868 B.getPtrTy(), File->getType()); 1869 if (File->getType()->isPointerTy()) 1870 inferNonMandatoryLibFuncAttrs(M, FPutsName, *TLI); 1871 CallInst *CI = B.CreateCall(F, {Str, File}, FPutsName); 1872 1873 if (const Function *Fn = 1874 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1875 CI->setCallingConv(Fn->getCallingConv()); 1876 return CI; 1877 } 1878 1879 Value *llvm::emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilderBase &B, 1880 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1881 Module *M = B.GetInsertBlock()->getModule(); 1882 if (!isLibFuncEmittable(M, TLI, LibFunc_fwrite)) 1883 return nullptr; 1884 1885 Type *SizeTTy = getSizeTTy(B, TLI); 1886 StringRef FWriteName = TLI->getName(LibFunc_fwrite); 1887 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fwrite, 1888 SizeTTy, B.getPtrTy(), SizeTTy, 1889 SizeTTy, File->getType()); 1890 1891 if (File->getType()->isPointerTy()) 1892 inferNonMandatoryLibFuncAttrs(M, FWriteName, *TLI); 1893 CallInst *CI = 1894 B.CreateCall(F, {Ptr, Size, 1895 ConstantInt::get(SizeTTy, 1), File}); 1896 1897 if (const Function *Fn = 1898 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1899 CI->setCallingConv(Fn->getCallingConv()); 1900 return CI; 1901 } 1902 1903 Value *llvm::emitMalloc(Value *Num, IRBuilderBase &B, const DataLayout &DL, 1904 const TargetLibraryInfo *TLI) { 1905 Module *M = B.GetInsertBlock()->getModule(); 1906 if (!isLibFuncEmittable(M, TLI, LibFunc_malloc)) 1907 return nullptr; 1908 1909 StringRef MallocName = TLI->getName(LibFunc_malloc); 1910 Type *SizeTTy = getSizeTTy(B, TLI); 1911 FunctionCallee Malloc = getOrInsertLibFunc(M, *TLI, LibFunc_malloc, 1912 B.getPtrTy(), SizeTTy); 1913 inferNonMandatoryLibFuncAttrs(M, MallocName, *TLI); 1914 CallInst *CI = B.CreateCall(Malloc, Num, MallocName); 1915 1916 if (const Function *F = 1917 dyn_cast<Function>(Malloc.getCallee()->stripPointerCasts())) 1918 CI->setCallingConv(F->getCallingConv()); 1919 1920 return CI; 1921 } 1922 1923 Value *llvm::emitCalloc(Value *Num, Value *Size, IRBuilderBase &B, 1924 const TargetLibraryInfo &TLI) { 1925 Module *M = B.GetInsertBlock()->getModule(); 1926 if (!isLibFuncEmittable(M, &TLI, LibFunc_calloc)) 1927 return nullptr; 1928 1929 StringRef CallocName = TLI.getName(LibFunc_calloc); 1930 Type *SizeTTy = getSizeTTy(B, &TLI); 1931 FunctionCallee Calloc = getOrInsertLibFunc(M, TLI, LibFunc_calloc, 1932 B.getPtrTy(), SizeTTy, SizeTTy); 1933 inferNonMandatoryLibFuncAttrs(M, CallocName, TLI); 1934 CallInst *CI = B.CreateCall(Calloc, {Num, Size}, CallocName); 1935 1936 if (const auto *F = 1937 dyn_cast<Function>(Calloc.getCallee()->stripPointerCasts())) 1938 CI->setCallingConv(F->getCallingConv()); 1939 1940 return CI; 1941 } 1942 1943 Value *llvm::emitHotColdNew(Value *Num, IRBuilderBase &B, 1944 const TargetLibraryInfo *TLI, LibFunc NewFunc, 1945 uint8_t HotCold) { 1946 Module *M = B.GetInsertBlock()->getModule(); 1947 if (!isLibFuncEmittable(M, TLI, NewFunc)) 1948 return nullptr; 1949 1950 StringRef Name = TLI->getName(NewFunc); 1951 FunctionCallee Func = M->getOrInsertFunction(Name, B.getPtrTy(), 1952 Num->getType(), B.getInt8Ty()); 1953 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1954 CallInst *CI = B.CreateCall(Func, {Num, B.getInt8(HotCold)}, Name); 1955 1956 if (const Function *F = 1957 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 1958 CI->setCallingConv(F->getCallingConv()); 1959 1960 return CI; 1961 } 1962 1963 Value *llvm::emitHotColdNewNoThrow(Value *Num, Value *NoThrow, IRBuilderBase &B, 1964 const TargetLibraryInfo *TLI, 1965 LibFunc NewFunc, uint8_t HotCold) { 1966 Module *M = B.GetInsertBlock()->getModule(); 1967 if (!isLibFuncEmittable(M, TLI, NewFunc)) 1968 return nullptr; 1969 1970 StringRef Name = TLI->getName(NewFunc); 1971 FunctionCallee Func = 1972 M->getOrInsertFunction(Name, B.getPtrTy(), Num->getType(), 1973 NoThrow->getType(), B.getInt8Ty()); 1974 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1975 CallInst *CI = B.CreateCall(Func, {Num, NoThrow, B.getInt8(HotCold)}, Name); 1976 1977 if (const Function *F = 1978 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 1979 CI->setCallingConv(F->getCallingConv()); 1980 1981 return CI; 1982 } 1983 1984 Value *llvm::emitHotColdNewAligned(Value *Num, Value *Align, IRBuilderBase &B, 1985 const TargetLibraryInfo *TLI, 1986 LibFunc NewFunc, uint8_t HotCold) { 1987 Module *M = B.GetInsertBlock()->getModule(); 1988 if (!isLibFuncEmittable(M, TLI, NewFunc)) 1989 return nullptr; 1990 1991 StringRef Name = TLI->getName(NewFunc); 1992 FunctionCallee Func = M->getOrInsertFunction( 1993 Name, B.getPtrTy(), Num->getType(), Align->getType(), B.getInt8Ty()); 1994 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1995 CallInst *CI = B.CreateCall(Func, {Num, Align, B.getInt8(HotCold)}, Name); 1996 1997 if (const Function *F = 1998 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 1999 CI->setCallingConv(F->getCallingConv()); 2000 2001 return CI; 2002 } 2003 2004 Value *llvm::emitHotColdNewAlignedNoThrow(Value *Num, Value *Align, 2005 Value *NoThrow, IRBuilderBase &B, 2006 const TargetLibraryInfo *TLI, 2007 LibFunc NewFunc, uint8_t HotCold) { 2008 Module *M = B.GetInsertBlock()->getModule(); 2009 if (!isLibFuncEmittable(M, TLI, NewFunc)) 2010 return nullptr; 2011 2012 StringRef Name = TLI->getName(NewFunc); 2013 FunctionCallee Func = M->getOrInsertFunction( 2014 Name, B.getPtrTy(), Num->getType(), Align->getType(), 2015 NoThrow->getType(), B.getInt8Ty()); 2016 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2017 CallInst *CI = 2018 B.CreateCall(Func, {Num, Align, NoThrow, B.getInt8(HotCold)}, Name); 2019 2020 if (const Function *F = 2021 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2022 CI->setCallingConv(F->getCallingConv()); 2023 2024 return CI; 2025 } 2026