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_remquo: 1102 case LibFunc_remquof: 1103 case LibFunc_remquol: 1104 Changed |= setDoesNotCapture(F, 2); 1105 [[fallthrough]]; 1106 case LibFunc_abs: 1107 case LibFunc_acos: 1108 case LibFunc_acosf: 1109 case LibFunc_acosh: 1110 case LibFunc_acoshf: 1111 case LibFunc_acoshl: 1112 case LibFunc_acosl: 1113 case LibFunc_asin: 1114 case LibFunc_asinf: 1115 case LibFunc_asinh: 1116 case LibFunc_asinhf: 1117 case LibFunc_asinhl: 1118 case LibFunc_asinl: 1119 case LibFunc_atan: 1120 case LibFunc_atan2: 1121 case LibFunc_atan2f: 1122 case LibFunc_atan2l: 1123 case LibFunc_atanf: 1124 case LibFunc_atanh: 1125 case LibFunc_atanhf: 1126 case LibFunc_atanhl: 1127 case LibFunc_atanl: 1128 case LibFunc_cbrt: 1129 case LibFunc_cbrtf: 1130 case LibFunc_cbrtl: 1131 case LibFunc_ceil: 1132 case LibFunc_ceilf: 1133 case LibFunc_ceill: 1134 case LibFunc_copysign: 1135 case LibFunc_copysignf: 1136 case LibFunc_copysignl: 1137 case LibFunc_cos: 1138 case LibFunc_cosh: 1139 case LibFunc_coshf: 1140 case LibFunc_coshl: 1141 case LibFunc_cosf: 1142 case LibFunc_cosl: 1143 case LibFunc_cospi: 1144 case LibFunc_cospif: 1145 case LibFunc_erf: 1146 case LibFunc_erff: 1147 case LibFunc_erfl: 1148 case LibFunc_exp: 1149 case LibFunc_expf: 1150 case LibFunc_expl: 1151 case LibFunc_exp2: 1152 case LibFunc_exp2f: 1153 case LibFunc_exp2l: 1154 case LibFunc_expm1: 1155 case LibFunc_expm1f: 1156 case LibFunc_expm1l: 1157 case LibFunc_fabs: 1158 case LibFunc_fabsf: 1159 case LibFunc_fabsl: 1160 case LibFunc_ffs: 1161 case LibFunc_ffsl: 1162 case LibFunc_ffsll: 1163 case LibFunc_floor: 1164 case LibFunc_floorf: 1165 case LibFunc_floorl: 1166 case LibFunc_fls: 1167 case LibFunc_flsl: 1168 case LibFunc_flsll: 1169 case LibFunc_fmax: 1170 case LibFunc_fmaxf: 1171 case LibFunc_fmaxl: 1172 case LibFunc_fmin: 1173 case LibFunc_fminf: 1174 case LibFunc_fminl: 1175 case LibFunc_fmod: 1176 case LibFunc_fmodf: 1177 case LibFunc_fmodl: 1178 case LibFunc_isascii: 1179 case LibFunc_isdigit: 1180 case LibFunc_labs: 1181 case LibFunc_llabs: 1182 case LibFunc_log: 1183 case LibFunc_log10: 1184 case LibFunc_log10f: 1185 case LibFunc_log10l: 1186 case LibFunc_log1p: 1187 case LibFunc_log1pf: 1188 case LibFunc_log1pl: 1189 case LibFunc_log2: 1190 case LibFunc_log2f: 1191 case LibFunc_log2l: 1192 case LibFunc_logb: 1193 case LibFunc_logbf: 1194 case LibFunc_logbl: 1195 case LibFunc_logf: 1196 case LibFunc_logl: 1197 case LibFunc_nearbyint: 1198 case LibFunc_nearbyintf: 1199 case LibFunc_nearbyintl: 1200 case LibFunc_pow: 1201 case LibFunc_powf: 1202 case LibFunc_powl: 1203 case LibFunc_remainder: 1204 case LibFunc_remainderf: 1205 case LibFunc_remainderl: 1206 case LibFunc_rint: 1207 case LibFunc_rintf: 1208 case LibFunc_rintl: 1209 case LibFunc_round: 1210 case LibFunc_roundf: 1211 case LibFunc_roundl: 1212 case LibFunc_sin: 1213 case LibFunc_sincospif_stret: 1214 case LibFunc_sinf: 1215 case LibFunc_sinh: 1216 case LibFunc_sinhf: 1217 case LibFunc_sinhl: 1218 case LibFunc_sinl: 1219 case LibFunc_sinpi: 1220 case LibFunc_sinpif: 1221 case LibFunc_sqrt: 1222 case LibFunc_sqrtf: 1223 case LibFunc_sqrtl: 1224 case LibFunc_tan: 1225 case LibFunc_tanf: 1226 case LibFunc_tanh: 1227 case LibFunc_tanhf: 1228 case LibFunc_tanhl: 1229 case LibFunc_tanl: 1230 case LibFunc_toascii: 1231 case LibFunc_trunc: 1232 case LibFunc_truncf: 1233 case LibFunc_truncl: 1234 Changed |= setDoesNotThrow(F); 1235 Changed |= setDoesNotFreeMemory(F); 1236 Changed |= setOnlyWritesMemory(F); 1237 Changed |= setWillReturn(F); 1238 break; 1239 default: 1240 // FIXME: It'd be really nice to cover all the library functions we're 1241 // aware of here. 1242 break; 1243 } 1244 // We have to do this step after AllocKind has been inferred on functions so 1245 // we can reliably identify free-like and realloc-like functions. 1246 if (!isLibFreeFunction(&F, TheLibFunc) && !isReallocLikeFn(&F)) 1247 Changed |= setDoesNotFreeMemory(F); 1248 return Changed; 1249 } 1250 1251 static void setArgExtAttr(Function &F, unsigned ArgNo, 1252 const TargetLibraryInfo &TLI, bool Signed = true) { 1253 Attribute::AttrKind ExtAttr = TLI.getExtAttrForI32Param(Signed); 1254 if (ExtAttr != Attribute::None && !F.hasParamAttribute(ArgNo, ExtAttr)) 1255 F.addParamAttr(ArgNo, ExtAttr); 1256 } 1257 1258 static void setRetExtAttr(Function &F, 1259 const TargetLibraryInfo &TLI, bool Signed = true) { 1260 Attribute::AttrKind ExtAttr = TLI.getExtAttrForI32Return(Signed); 1261 if (ExtAttr != Attribute::None && !F.hasRetAttribute(ExtAttr)) 1262 F.addRetAttr(ExtAttr); 1263 } 1264 1265 // Modeled after X86TargetLowering::markLibCallAttributes. 1266 void llvm::markRegisterParameterAttributes(Function *F) { 1267 if (!F->arg_size() || F->isVarArg()) 1268 return; 1269 1270 const CallingConv::ID CC = F->getCallingConv(); 1271 if (CC != CallingConv::C && CC != CallingConv::X86_StdCall) 1272 return; 1273 1274 const Module *M = F->getParent(); 1275 unsigned N = M->getNumberRegisterParameters(); 1276 if (!N) 1277 return; 1278 1279 const DataLayout &DL = M->getDataLayout(); 1280 1281 for (Argument &A : F->args()) { 1282 Type *T = A.getType(); 1283 if (!T->isIntOrPtrTy()) 1284 continue; 1285 1286 const TypeSize &TS = DL.getTypeAllocSize(T); 1287 if (TS > 8) 1288 continue; 1289 1290 assert(TS <= 4 && "Need to account for parameters larger than word size"); 1291 const unsigned NumRegs = TS > 4 ? 2 : 1; 1292 if (N < NumRegs) 1293 return; 1294 1295 N -= NumRegs; 1296 F->addParamAttr(A.getArgNo(), Attribute::InReg); 1297 } 1298 } 1299 1300 FunctionCallee llvm::getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI, 1301 LibFunc TheLibFunc, FunctionType *T, 1302 AttributeList AttributeList) { 1303 assert(TLI.has(TheLibFunc) && 1304 "Creating call to non-existing library function."); 1305 StringRef Name = TLI.getName(TheLibFunc); 1306 FunctionCallee C = M->getOrInsertFunction(Name, T, AttributeList); 1307 1308 // Make sure any mandatory argument attributes are added. 1309 1310 // Any outgoing i32 argument should be handled with setArgExtAttr() which 1311 // will add an extension attribute if the target ABI requires it. Adding 1312 // argument extensions is typically done by the front end but when an 1313 // optimizer is building a library call on its own it has to take care of 1314 // this. Each such generated function must be handled here with sign or 1315 // zero extensions as needed. F is retreived with cast<> because we demand 1316 // of the caller to have called isLibFuncEmittable() first. 1317 Function *F = cast<Function>(C.getCallee()); 1318 assert(F->getFunctionType() == T && "Function type does not match."); 1319 switch (TheLibFunc) { 1320 case LibFunc_fputc: 1321 case LibFunc_putchar: 1322 setArgExtAttr(*F, 0, TLI); 1323 break; 1324 case LibFunc_ldexp: 1325 case LibFunc_ldexpf: 1326 case LibFunc_ldexpl: 1327 case LibFunc_memchr: 1328 case LibFunc_memrchr: 1329 case LibFunc_strchr: 1330 setArgExtAttr(*F, 1, TLI); 1331 break; 1332 case LibFunc_memccpy: 1333 setArgExtAttr(*F, 2, TLI); 1334 break; 1335 1336 // These are functions that are known to not need any argument extension 1337 // on any target: A size_t argument (which may be an i32 on some targets) 1338 // should not trigger the assert below. 1339 case LibFunc_bcmp: 1340 setRetExtAttr(*F, TLI); 1341 break; 1342 case LibFunc_calloc: 1343 case LibFunc_fwrite: 1344 case LibFunc_malloc: 1345 case LibFunc_memcmp: 1346 case LibFunc_memcpy_chk: 1347 case LibFunc_mempcpy: 1348 case LibFunc_memset_pattern16: 1349 case LibFunc_snprintf: 1350 case LibFunc_stpncpy: 1351 case LibFunc_strlcat: 1352 case LibFunc_strlcpy: 1353 case LibFunc_strncat: 1354 case LibFunc_strncmp: 1355 case LibFunc_strncpy: 1356 case LibFunc_vsnprintf: 1357 break; 1358 1359 default: 1360 #ifndef NDEBUG 1361 for (unsigned i = 0; i < T->getNumParams(); i++) 1362 assert(!isa<IntegerType>(T->getParamType(i)) && 1363 "Unhandled integer argument."); 1364 #endif 1365 break; 1366 } 1367 1368 markRegisterParameterAttributes(F); 1369 1370 return C; 1371 } 1372 1373 FunctionCallee llvm::getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI, 1374 LibFunc TheLibFunc, FunctionType *T) { 1375 return getOrInsertLibFunc(M, TLI, TheLibFunc, T, AttributeList()); 1376 } 1377 1378 bool llvm::isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI, 1379 LibFunc TheLibFunc) { 1380 StringRef FuncName = TLI->getName(TheLibFunc); 1381 if (!TLI->has(TheLibFunc)) 1382 return false; 1383 1384 // Check if the Module already has a GlobalValue with the same name, in 1385 // which case it must be a Function with the expected type. 1386 if (GlobalValue *GV = M->getNamedValue(FuncName)) { 1387 if (auto *F = dyn_cast<Function>(GV)) 1388 return TLI->isValidProtoForLibFunc(*F->getFunctionType(), TheLibFunc, *M); 1389 return false; 1390 } 1391 1392 return true; 1393 } 1394 1395 bool llvm::isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI, 1396 StringRef Name) { 1397 LibFunc TheLibFunc; 1398 return TLI->getLibFunc(Name, TheLibFunc) && 1399 isLibFuncEmittable(M, TLI, TheLibFunc); 1400 } 1401 1402 bool llvm::hasFloatFn(const Module *M, const TargetLibraryInfo *TLI, Type *Ty, 1403 LibFunc DoubleFn, LibFunc FloatFn, LibFunc LongDoubleFn) { 1404 switch (Ty->getTypeID()) { 1405 case Type::HalfTyID: 1406 return false; 1407 case Type::FloatTyID: 1408 return isLibFuncEmittable(M, TLI, FloatFn); 1409 case Type::DoubleTyID: 1410 return isLibFuncEmittable(M, TLI, DoubleFn); 1411 default: 1412 return isLibFuncEmittable(M, TLI, LongDoubleFn); 1413 } 1414 } 1415 1416 StringRef llvm::getFloatFn(const Module *M, const TargetLibraryInfo *TLI, 1417 Type *Ty, LibFunc DoubleFn, LibFunc FloatFn, 1418 LibFunc LongDoubleFn, LibFunc &TheLibFunc) { 1419 assert(hasFloatFn(M, TLI, Ty, DoubleFn, FloatFn, LongDoubleFn) && 1420 "Cannot get name for unavailable function!"); 1421 1422 switch (Ty->getTypeID()) { 1423 case Type::HalfTyID: 1424 llvm_unreachable("No name for HalfTy!"); 1425 case Type::FloatTyID: 1426 TheLibFunc = FloatFn; 1427 return TLI->getName(FloatFn); 1428 case Type::DoubleTyID: 1429 TheLibFunc = DoubleFn; 1430 return TLI->getName(DoubleFn); 1431 default: 1432 TheLibFunc = LongDoubleFn; 1433 return TLI->getName(LongDoubleFn); 1434 } 1435 } 1436 1437 //- Emit LibCalls ------------------------------------------------------------// 1438 1439 static IntegerType *getIntTy(IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1440 return B.getIntNTy(TLI->getIntSize()); 1441 } 1442 1443 static IntegerType *getSizeTTy(IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1444 const Module *M = B.GetInsertBlock()->getModule(); 1445 return B.getIntNTy(TLI->getSizeTSize(*M)); 1446 } 1447 1448 static Value *emitLibCall(LibFunc TheLibFunc, Type *ReturnType, 1449 ArrayRef<Type *> ParamTypes, 1450 ArrayRef<Value *> Operands, IRBuilderBase &B, 1451 const TargetLibraryInfo *TLI, 1452 bool IsVaArgs = false) { 1453 Module *M = B.GetInsertBlock()->getModule(); 1454 if (!isLibFuncEmittable(M, TLI, TheLibFunc)) 1455 return nullptr; 1456 1457 StringRef FuncName = TLI->getName(TheLibFunc); 1458 FunctionType *FuncType = FunctionType::get(ReturnType, ParamTypes, IsVaArgs); 1459 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, FuncType); 1460 inferNonMandatoryLibFuncAttrs(M, FuncName, *TLI); 1461 CallInst *CI = B.CreateCall(Callee, Operands, FuncName); 1462 if (const Function *F = 1463 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1464 CI->setCallingConv(F->getCallingConv()); 1465 return CI; 1466 } 1467 1468 Value *llvm::emitStrLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL, 1469 const TargetLibraryInfo *TLI) { 1470 Type *CharPtrTy = B.getPtrTy(); 1471 Type *SizeTTy = getSizeTTy(B, TLI); 1472 return emitLibCall(LibFunc_strlen, SizeTTy, CharPtrTy, Ptr, B, TLI); 1473 } 1474 1475 Value *llvm::emitStrDup(Value *Ptr, IRBuilderBase &B, 1476 const TargetLibraryInfo *TLI) { 1477 Type *CharPtrTy = B.getPtrTy(); 1478 return emitLibCall(LibFunc_strdup, CharPtrTy, CharPtrTy, Ptr, B, TLI); 1479 } 1480 1481 Value *llvm::emitStrChr(Value *Ptr, char C, IRBuilderBase &B, 1482 const TargetLibraryInfo *TLI) { 1483 Type *CharPtrTy = B.getPtrTy(); 1484 Type *IntTy = getIntTy(B, TLI); 1485 return emitLibCall(LibFunc_strchr, CharPtrTy, {CharPtrTy, IntTy}, 1486 {Ptr, ConstantInt::get(IntTy, C)}, B, TLI); 1487 } 1488 1489 Value *llvm::emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1490 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1491 Type *CharPtrTy = B.getPtrTy(); 1492 Type *IntTy = getIntTy(B, TLI); 1493 Type *SizeTTy = getSizeTTy(B, TLI); 1494 return emitLibCall( 1495 LibFunc_strncmp, IntTy, 1496 {CharPtrTy, CharPtrTy, SizeTTy}, 1497 {Ptr1, Ptr2, Len}, B, TLI); 1498 } 1499 1500 Value *llvm::emitStrCpy(Value *Dst, Value *Src, IRBuilderBase &B, 1501 const TargetLibraryInfo *TLI) { 1502 Type *CharPtrTy = Dst->getType(); 1503 return emitLibCall(LibFunc_strcpy, CharPtrTy, {CharPtrTy, CharPtrTy}, 1504 {Dst, Src}, B, TLI); 1505 } 1506 1507 Value *llvm::emitStpCpy(Value *Dst, Value *Src, IRBuilderBase &B, 1508 const TargetLibraryInfo *TLI) { 1509 Type *CharPtrTy = B.getPtrTy(); 1510 return emitLibCall(LibFunc_stpcpy, CharPtrTy, {CharPtrTy, CharPtrTy}, 1511 {Dst, Src}, B, TLI); 1512 } 1513 1514 Value *llvm::emitStrNCpy(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_strncpy, CharPtrTy, {CharPtrTy, CharPtrTy, SizeTTy}, 1519 {Dst, Src, Len}, B, TLI); 1520 } 1521 1522 Value *llvm::emitStpNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1523 const TargetLibraryInfo *TLI) { 1524 Type *CharPtrTy = B.getPtrTy(); 1525 Type *SizeTTy = getSizeTTy(B, TLI); 1526 return emitLibCall(LibFunc_stpncpy, CharPtrTy, {CharPtrTy, CharPtrTy, SizeTTy}, 1527 {Dst, Src, Len}, B, TLI); 1528 } 1529 1530 Value *llvm::emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize, 1531 IRBuilderBase &B, const DataLayout &DL, 1532 const TargetLibraryInfo *TLI) { 1533 Module *M = B.GetInsertBlock()->getModule(); 1534 if (!isLibFuncEmittable(M, TLI, LibFunc_memcpy_chk)) 1535 return nullptr; 1536 1537 AttributeList AS; 1538 AS = AttributeList::get(M->getContext(), AttributeList::FunctionIndex, 1539 Attribute::NoUnwind); 1540 Type *VoidPtrTy = B.getPtrTy(); 1541 Type *SizeTTy = getSizeTTy(B, TLI); 1542 FunctionCallee MemCpy = getOrInsertLibFunc(M, *TLI, LibFunc_memcpy_chk, 1543 AttributeList::get(M->getContext(), AS), VoidPtrTy, 1544 VoidPtrTy, VoidPtrTy, SizeTTy, SizeTTy); 1545 CallInst *CI = B.CreateCall(MemCpy, {Dst, Src, Len, ObjSize}); 1546 if (const Function *F = 1547 dyn_cast<Function>(MemCpy.getCallee()->stripPointerCasts())) 1548 CI->setCallingConv(F->getCallingConv()); 1549 return CI; 1550 } 1551 1552 Value *llvm::emitMemPCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1553 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1554 Type *VoidPtrTy = B.getPtrTy(); 1555 Type *SizeTTy = getSizeTTy(B, TLI); 1556 return emitLibCall(LibFunc_mempcpy, VoidPtrTy, 1557 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1558 {Dst, Src, Len}, B, TLI); 1559 } 1560 1561 Value *llvm::emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B, 1562 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1563 Type *VoidPtrTy = B.getPtrTy(); 1564 Type *IntTy = getIntTy(B, TLI); 1565 Type *SizeTTy = getSizeTTy(B, TLI); 1566 return emitLibCall(LibFunc_memchr, VoidPtrTy, 1567 {VoidPtrTy, IntTy, SizeTTy}, 1568 {Ptr, Val, Len}, B, TLI); 1569 } 1570 1571 Value *llvm::emitMemRChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B, 1572 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1573 Type *VoidPtrTy = B.getPtrTy(); 1574 Type *IntTy = getIntTy(B, TLI); 1575 Type *SizeTTy = getSizeTTy(B, TLI); 1576 return emitLibCall(LibFunc_memrchr, VoidPtrTy, 1577 {VoidPtrTy, IntTy, SizeTTy}, 1578 {Ptr, Val, Len}, B, TLI); 1579 } 1580 1581 Value *llvm::emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1582 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1583 Type *VoidPtrTy = B.getPtrTy(); 1584 Type *IntTy = getIntTy(B, TLI); 1585 Type *SizeTTy = getSizeTTy(B, TLI); 1586 return emitLibCall(LibFunc_memcmp, IntTy, 1587 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1588 {Ptr1, Ptr2, Len}, B, TLI); 1589 } 1590 1591 Value *llvm::emitBCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1592 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1593 Type *VoidPtrTy = B.getPtrTy(); 1594 Type *IntTy = getIntTy(B, TLI); 1595 Type *SizeTTy = getSizeTTy(B, TLI); 1596 return emitLibCall(LibFunc_bcmp, IntTy, 1597 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1598 {Ptr1, Ptr2, Len}, B, TLI); 1599 } 1600 1601 Value *llvm::emitMemCCpy(Value *Ptr1, Value *Ptr2, Value *Val, Value *Len, 1602 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1603 Type *VoidPtrTy = B.getPtrTy(); 1604 Type *IntTy = getIntTy(B, TLI); 1605 Type *SizeTTy = getSizeTTy(B, TLI); 1606 return emitLibCall(LibFunc_memccpy, VoidPtrTy, 1607 {VoidPtrTy, VoidPtrTy, IntTy, SizeTTy}, 1608 {Ptr1, Ptr2, Val, Len}, B, TLI); 1609 } 1610 1611 Value *llvm::emitSNPrintf(Value *Dest, Value *Size, Value *Fmt, 1612 ArrayRef<Value *> VariadicArgs, IRBuilderBase &B, 1613 const TargetLibraryInfo *TLI) { 1614 Type *CharPtrTy = B.getPtrTy(); 1615 Type *IntTy = getIntTy(B, TLI); 1616 Type *SizeTTy = getSizeTTy(B, TLI); 1617 SmallVector<Value *, 8> Args{Dest, Size, Fmt}; 1618 llvm::append_range(Args, VariadicArgs); 1619 return emitLibCall(LibFunc_snprintf, IntTy, 1620 {CharPtrTy, SizeTTy, CharPtrTy}, 1621 Args, B, TLI, /*IsVaArgs=*/true); 1622 } 1623 1624 Value *llvm::emitSPrintf(Value *Dest, Value *Fmt, 1625 ArrayRef<Value *> VariadicArgs, IRBuilderBase &B, 1626 const TargetLibraryInfo *TLI) { 1627 Type *CharPtrTy = B.getPtrTy(); 1628 Type *IntTy = getIntTy(B, TLI); 1629 SmallVector<Value *, 8> Args{Dest, Fmt}; 1630 llvm::append_range(Args, VariadicArgs); 1631 return emitLibCall(LibFunc_sprintf, IntTy, 1632 {CharPtrTy, CharPtrTy}, Args, B, TLI, 1633 /*IsVaArgs=*/true); 1634 } 1635 1636 Value *llvm::emitStrCat(Value *Dest, Value *Src, IRBuilderBase &B, 1637 const TargetLibraryInfo *TLI) { 1638 Type *CharPtrTy = B.getPtrTy(); 1639 return emitLibCall(LibFunc_strcat, CharPtrTy, 1640 {CharPtrTy, CharPtrTy}, 1641 {Dest, Src}, B, TLI); 1642 } 1643 1644 Value *llvm::emitStrLCpy(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1645 const TargetLibraryInfo *TLI) { 1646 Type *CharPtrTy = B.getPtrTy(); 1647 Type *SizeTTy = getSizeTTy(B, TLI); 1648 return emitLibCall(LibFunc_strlcpy, SizeTTy, 1649 {CharPtrTy, CharPtrTy, SizeTTy}, 1650 {Dest, Src, Size}, B, TLI); 1651 } 1652 1653 Value *llvm::emitStrLCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1654 const TargetLibraryInfo *TLI) { 1655 Type *CharPtrTy = B.getPtrTy(); 1656 Type *SizeTTy = getSizeTTy(B, TLI); 1657 return emitLibCall(LibFunc_strlcat, SizeTTy, 1658 {CharPtrTy, CharPtrTy, SizeTTy}, 1659 {Dest, Src, Size}, B, TLI); 1660 } 1661 1662 Value *llvm::emitStrNCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1663 const TargetLibraryInfo *TLI) { 1664 Type *CharPtrTy = B.getPtrTy(); 1665 Type *SizeTTy = getSizeTTy(B, TLI); 1666 return emitLibCall(LibFunc_strncat, CharPtrTy, 1667 {CharPtrTy, CharPtrTy, SizeTTy}, 1668 {Dest, Src, Size}, B, TLI); 1669 } 1670 1671 Value *llvm::emitVSNPrintf(Value *Dest, Value *Size, Value *Fmt, Value *VAList, 1672 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1673 Type *CharPtrTy = B.getPtrTy(); 1674 Type *IntTy = getIntTy(B, TLI); 1675 Type *SizeTTy = getSizeTTy(B, TLI); 1676 return emitLibCall( 1677 LibFunc_vsnprintf, IntTy, 1678 {CharPtrTy, SizeTTy, CharPtrTy, VAList->getType()}, 1679 {Dest, Size, Fmt, VAList}, B, TLI); 1680 } 1681 1682 Value *llvm::emitVSPrintf(Value *Dest, Value *Fmt, Value *VAList, 1683 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1684 Type *CharPtrTy = B.getPtrTy(); 1685 Type *IntTy = getIntTy(B, TLI); 1686 return emitLibCall(LibFunc_vsprintf, IntTy, 1687 {CharPtrTy, CharPtrTy, VAList->getType()}, 1688 {Dest, Fmt, VAList}, B, TLI); 1689 } 1690 1691 /// Append a suffix to the function name according to the type of 'Op'. 1692 static void appendTypeSuffix(Value *Op, StringRef &Name, 1693 SmallString<20> &NameBuffer) { 1694 if (!Op->getType()->isDoubleTy()) { 1695 NameBuffer += Name; 1696 1697 if (Op->getType()->isFloatTy()) 1698 NameBuffer += 'f'; 1699 else 1700 NameBuffer += 'l'; 1701 1702 Name = NameBuffer; 1703 } 1704 } 1705 1706 static Value *emitUnaryFloatFnCallHelper(Value *Op, LibFunc TheLibFunc, 1707 StringRef Name, IRBuilderBase &B, 1708 const AttributeList &Attrs, 1709 const TargetLibraryInfo *TLI) { 1710 assert((Name != "") && "Must specify Name to emitUnaryFloatFnCall"); 1711 1712 Module *M = B.GetInsertBlock()->getModule(); 1713 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, Op->getType(), 1714 Op->getType()); 1715 CallInst *CI = B.CreateCall(Callee, Op, Name); 1716 1717 // The incoming attribute set may have come from a speculatable intrinsic, but 1718 // is being replaced with a library call which is not allowed to be 1719 // speculatable. 1720 CI->setAttributes( 1721 Attrs.removeFnAttribute(B.getContext(), Attribute::Speculatable)); 1722 if (const Function *F = 1723 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1724 CI->setCallingConv(F->getCallingConv()); 1725 1726 return CI; 1727 } 1728 1729 Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI, 1730 StringRef Name, IRBuilderBase &B, 1731 const AttributeList &Attrs) { 1732 SmallString<20> NameBuffer; 1733 appendTypeSuffix(Op, Name, NameBuffer); 1734 1735 LibFunc TheLibFunc; 1736 TLI->getLibFunc(Name, TheLibFunc); 1737 1738 return emitUnaryFloatFnCallHelper(Op, TheLibFunc, Name, B, Attrs, TLI); 1739 } 1740 1741 Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI, 1742 LibFunc DoubleFn, LibFunc FloatFn, 1743 LibFunc LongDoubleFn, IRBuilderBase &B, 1744 const AttributeList &Attrs) { 1745 // Get the name of the function according to TLI. 1746 Module *M = B.GetInsertBlock()->getModule(); 1747 LibFunc TheLibFunc; 1748 StringRef Name = getFloatFn(M, TLI, Op->getType(), DoubleFn, FloatFn, 1749 LongDoubleFn, TheLibFunc); 1750 1751 return emitUnaryFloatFnCallHelper(Op, TheLibFunc, Name, B, Attrs, TLI); 1752 } 1753 1754 static Value *emitBinaryFloatFnCallHelper(Value *Op1, Value *Op2, 1755 LibFunc TheLibFunc, 1756 StringRef Name, IRBuilderBase &B, 1757 const AttributeList &Attrs, 1758 const TargetLibraryInfo *TLI) { 1759 assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall"); 1760 1761 Module *M = B.GetInsertBlock()->getModule(); 1762 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, Op1->getType(), 1763 Op1->getType(), Op2->getType()); 1764 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1765 CallInst *CI = B.CreateCall(Callee, { Op1, Op2 }, Name); 1766 1767 // The incoming attribute set may have come from a speculatable intrinsic, but 1768 // is being replaced with a library call which is not allowed to be 1769 // speculatable. 1770 CI->setAttributes( 1771 Attrs.removeFnAttribute(B.getContext(), Attribute::Speculatable)); 1772 if (const Function *F = 1773 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1774 CI->setCallingConv(F->getCallingConv()); 1775 1776 return CI; 1777 } 1778 1779 Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, 1780 const TargetLibraryInfo *TLI, 1781 StringRef Name, IRBuilderBase &B, 1782 const AttributeList &Attrs) { 1783 assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall"); 1784 1785 SmallString<20> NameBuffer; 1786 appendTypeSuffix(Op1, Name, NameBuffer); 1787 1788 LibFunc TheLibFunc; 1789 TLI->getLibFunc(Name, TheLibFunc); 1790 1791 return emitBinaryFloatFnCallHelper(Op1, Op2, TheLibFunc, Name, B, Attrs, TLI); 1792 } 1793 1794 Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, 1795 const TargetLibraryInfo *TLI, 1796 LibFunc DoubleFn, LibFunc FloatFn, 1797 LibFunc LongDoubleFn, IRBuilderBase &B, 1798 const AttributeList &Attrs) { 1799 // Get the name of the function according to TLI. 1800 Module *M = B.GetInsertBlock()->getModule(); 1801 LibFunc TheLibFunc; 1802 StringRef Name = getFloatFn(M, TLI, Op1->getType(), DoubleFn, FloatFn, 1803 LongDoubleFn, TheLibFunc); 1804 1805 return emitBinaryFloatFnCallHelper(Op1, Op2, TheLibFunc, Name, B, Attrs, TLI); 1806 } 1807 1808 // Emit a call to putchar(int) with Char as the argument. Char must have 1809 // the same precision as int, which need not be 32 bits. 1810 Value *llvm::emitPutChar(Value *Char, IRBuilderBase &B, 1811 const TargetLibraryInfo *TLI) { 1812 Module *M = B.GetInsertBlock()->getModule(); 1813 if (!isLibFuncEmittable(M, TLI, LibFunc_putchar)) 1814 return nullptr; 1815 1816 Type *IntTy = getIntTy(B, TLI); 1817 StringRef PutCharName = TLI->getName(LibFunc_putchar); 1818 FunctionCallee PutChar = getOrInsertLibFunc(M, *TLI, LibFunc_putchar, 1819 IntTy, IntTy); 1820 inferNonMandatoryLibFuncAttrs(M, PutCharName, *TLI); 1821 CallInst *CI = B.CreateCall(PutChar, Char, PutCharName); 1822 1823 if (const Function *F = 1824 dyn_cast<Function>(PutChar.getCallee()->stripPointerCasts())) 1825 CI->setCallingConv(F->getCallingConv()); 1826 return CI; 1827 } 1828 1829 Value *llvm::emitPutS(Value *Str, IRBuilderBase &B, 1830 const TargetLibraryInfo *TLI) { 1831 Module *M = B.GetInsertBlock()->getModule(); 1832 if (!isLibFuncEmittable(M, TLI, LibFunc_puts)) 1833 return nullptr; 1834 1835 Type *IntTy = getIntTy(B, TLI); 1836 StringRef PutsName = TLI->getName(LibFunc_puts); 1837 FunctionCallee PutS = getOrInsertLibFunc(M, *TLI, LibFunc_puts, IntTy, 1838 B.getPtrTy()); 1839 inferNonMandatoryLibFuncAttrs(M, PutsName, *TLI); 1840 CallInst *CI = B.CreateCall(PutS, Str, PutsName); 1841 if (const Function *F = 1842 dyn_cast<Function>(PutS.getCallee()->stripPointerCasts())) 1843 CI->setCallingConv(F->getCallingConv()); 1844 return CI; 1845 } 1846 1847 Value *llvm::emitFPutC(Value *Char, Value *File, IRBuilderBase &B, 1848 const TargetLibraryInfo *TLI) { 1849 Module *M = B.GetInsertBlock()->getModule(); 1850 if (!isLibFuncEmittable(M, TLI, LibFunc_fputc)) 1851 return nullptr; 1852 1853 Type *IntTy = getIntTy(B, TLI); 1854 StringRef FPutcName = TLI->getName(LibFunc_fputc); 1855 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fputc, IntTy, 1856 IntTy, File->getType()); 1857 if (File->getType()->isPointerTy()) 1858 inferNonMandatoryLibFuncAttrs(M, FPutcName, *TLI); 1859 CallInst *CI = B.CreateCall(F, {Char, File}, FPutcName); 1860 1861 if (const Function *Fn = 1862 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1863 CI->setCallingConv(Fn->getCallingConv()); 1864 return CI; 1865 } 1866 1867 Value *llvm::emitFPutS(Value *Str, Value *File, IRBuilderBase &B, 1868 const TargetLibraryInfo *TLI) { 1869 Module *M = B.GetInsertBlock()->getModule(); 1870 if (!isLibFuncEmittable(M, TLI, LibFunc_fputs)) 1871 return nullptr; 1872 1873 Type *IntTy = getIntTy(B, TLI); 1874 StringRef FPutsName = TLI->getName(LibFunc_fputs); 1875 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fputs, IntTy, 1876 B.getPtrTy(), File->getType()); 1877 if (File->getType()->isPointerTy()) 1878 inferNonMandatoryLibFuncAttrs(M, FPutsName, *TLI); 1879 CallInst *CI = B.CreateCall(F, {Str, File}, FPutsName); 1880 1881 if (const Function *Fn = 1882 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1883 CI->setCallingConv(Fn->getCallingConv()); 1884 return CI; 1885 } 1886 1887 Value *llvm::emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilderBase &B, 1888 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1889 Module *M = B.GetInsertBlock()->getModule(); 1890 if (!isLibFuncEmittable(M, TLI, LibFunc_fwrite)) 1891 return nullptr; 1892 1893 Type *SizeTTy = getSizeTTy(B, TLI); 1894 StringRef FWriteName = TLI->getName(LibFunc_fwrite); 1895 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fwrite, 1896 SizeTTy, B.getPtrTy(), SizeTTy, 1897 SizeTTy, File->getType()); 1898 1899 if (File->getType()->isPointerTy()) 1900 inferNonMandatoryLibFuncAttrs(M, FWriteName, *TLI); 1901 CallInst *CI = 1902 B.CreateCall(F, {Ptr, Size, 1903 ConstantInt::get(SizeTTy, 1), File}); 1904 1905 if (const Function *Fn = 1906 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1907 CI->setCallingConv(Fn->getCallingConv()); 1908 return CI; 1909 } 1910 1911 Value *llvm::emitMalloc(Value *Num, IRBuilderBase &B, const DataLayout &DL, 1912 const TargetLibraryInfo *TLI) { 1913 Module *M = B.GetInsertBlock()->getModule(); 1914 if (!isLibFuncEmittable(M, TLI, LibFunc_malloc)) 1915 return nullptr; 1916 1917 StringRef MallocName = TLI->getName(LibFunc_malloc); 1918 Type *SizeTTy = getSizeTTy(B, TLI); 1919 FunctionCallee Malloc = getOrInsertLibFunc(M, *TLI, LibFunc_malloc, 1920 B.getPtrTy(), SizeTTy); 1921 inferNonMandatoryLibFuncAttrs(M, MallocName, *TLI); 1922 CallInst *CI = B.CreateCall(Malloc, Num, MallocName); 1923 1924 if (const Function *F = 1925 dyn_cast<Function>(Malloc.getCallee()->stripPointerCasts())) 1926 CI->setCallingConv(F->getCallingConv()); 1927 1928 return CI; 1929 } 1930 1931 Value *llvm::emitCalloc(Value *Num, Value *Size, IRBuilderBase &B, 1932 const TargetLibraryInfo &TLI) { 1933 Module *M = B.GetInsertBlock()->getModule(); 1934 if (!isLibFuncEmittable(M, &TLI, LibFunc_calloc)) 1935 return nullptr; 1936 1937 StringRef CallocName = TLI.getName(LibFunc_calloc); 1938 Type *SizeTTy = getSizeTTy(B, &TLI); 1939 FunctionCallee Calloc = getOrInsertLibFunc(M, TLI, LibFunc_calloc, 1940 B.getPtrTy(), SizeTTy, SizeTTy); 1941 inferNonMandatoryLibFuncAttrs(M, CallocName, TLI); 1942 CallInst *CI = B.CreateCall(Calloc, {Num, Size}, CallocName); 1943 1944 if (const auto *F = 1945 dyn_cast<Function>(Calloc.getCallee()->stripPointerCasts())) 1946 CI->setCallingConv(F->getCallingConv()); 1947 1948 return CI; 1949 } 1950 1951 Value *llvm::emitHotColdNew(Value *Num, IRBuilderBase &B, 1952 const TargetLibraryInfo *TLI, LibFunc NewFunc, 1953 uint8_t HotCold) { 1954 Module *M = B.GetInsertBlock()->getModule(); 1955 if (!isLibFuncEmittable(M, TLI, NewFunc)) 1956 return nullptr; 1957 1958 StringRef Name = TLI->getName(NewFunc); 1959 FunctionCallee Func = M->getOrInsertFunction(Name, B.getPtrTy(), 1960 Num->getType(), B.getInt8Ty()); 1961 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1962 CallInst *CI = B.CreateCall(Func, {Num, B.getInt8(HotCold)}, Name); 1963 1964 if (const Function *F = 1965 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 1966 CI->setCallingConv(F->getCallingConv()); 1967 1968 return CI; 1969 } 1970 1971 Value *llvm::emitHotColdNewNoThrow(Value *Num, Value *NoThrow, IRBuilderBase &B, 1972 const TargetLibraryInfo *TLI, 1973 LibFunc NewFunc, uint8_t HotCold) { 1974 Module *M = B.GetInsertBlock()->getModule(); 1975 if (!isLibFuncEmittable(M, TLI, NewFunc)) 1976 return nullptr; 1977 1978 StringRef Name = TLI->getName(NewFunc); 1979 FunctionCallee Func = 1980 M->getOrInsertFunction(Name, B.getPtrTy(), Num->getType(), 1981 NoThrow->getType(), B.getInt8Ty()); 1982 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1983 CallInst *CI = B.CreateCall(Func, {Num, NoThrow, B.getInt8(HotCold)}, Name); 1984 1985 if (const Function *F = 1986 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 1987 CI->setCallingConv(F->getCallingConv()); 1988 1989 return CI; 1990 } 1991 1992 Value *llvm::emitHotColdNewAligned(Value *Num, Value *Align, IRBuilderBase &B, 1993 const TargetLibraryInfo *TLI, 1994 LibFunc NewFunc, uint8_t HotCold) { 1995 Module *M = B.GetInsertBlock()->getModule(); 1996 if (!isLibFuncEmittable(M, TLI, NewFunc)) 1997 return nullptr; 1998 1999 StringRef Name = TLI->getName(NewFunc); 2000 FunctionCallee Func = M->getOrInsertFunction( 2001 Name, B.getPtrTy(), Num->getType(), Align->getType(), B.getInt8Ty()); 2002 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2003 CallInst *CI = B.CreateCall(Func, {Num, Align, B.getInt8(HotCold)}, Name); 2004 2005 if (const Function *F = 2006 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2007 CI->setCallingConv(F->getCallingConv()); 2008 2009 return CI; 2010 } 2011 2012 Value *llvm::emitHotColdNewAlignedNoThrow(Value *Num, Value *Align, 2013 Value *NoThrow, IRBuilderBase &B, 2014 const TargetLibraryInfo *TLI, 2015 LibFunc NewFunc, uint8_t HotCold) { 2016 Module *M = B.GetInsertBlock()->getModule(); 2017 if (!isLibFuncEmittable(M, TLI, NewFunc)) 2018 return nullptr; 2019 2020 StringRef Name = TLI->getName(NewFunc); 2021 FunctionCallee Func = M->getOrInsertFunction( 2022 Name, B.getPtrTy(), Num->getType(), Align->getType(), 2023 NoThrow->getType(), B.getInt8Ty()); 2024 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2025 CallInst *CI = 2026 B.CreateCall(Func, {Num, Align, NoThrow, B.getInt8(HotCold)}, Name); 2027 2028 if (const Function *F = 2029 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2030 CI->setCallingConv(F->getCallingConv()); 2031 2032 return CI; 2033 } 2034