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/DerivedTypes.h" 23 #include "llvm/IR/Function.h" 24 #include "llvm/IR/IRBuilder.h" 25 #include "llvm/IR/Module.h" 26 #include "llvm/IR/Type.h" 27 #include "llvm/Support/TypeSize.h" 28 #include <optional> 29 30 using namespace llvm; 31 32 #define DEBUG_TYPE "build-libcalls" 33 34 //- Infer Attributes ---------------------------------------------------------// 35 36 STATISTIC(NumReadNone, "Number of functions inferred as readnone"); 37 STATISTIC(NumInaccessibleMemOnly, 38 "Number of functions inferred as inaccessiblememonly"); 39 STATISTIC(NumReadOnly, "Number of functions inferred as readonly"); 40 STATISTIC(NumWriteOnly, "Number of functions inferred as writeonly"); 41 STATISTIC(NumArgMemOnly, "Number of functions inferred as argmemonly"); 42 STATISTIC(NumInaccessibleMemOrArgMemOnly, 43 "Number of functions inferred as inaccessiblemem_or_argmemonly"); 44 STATISTIC(NumNoUnwind, "Number of functions inferred as nounwind"); 45 STATISTIC(NumNoCapture, "Number of arguments inferred as nocapture"); 46 STATISTIC(NumWriteOnlyArg, "Number of arguments inferred as writeonly"); 47 STATISTIC(NumReadOnlyArg, "Number of arguments inferred as readonly"); 48 STATISTIC(NumNoAlias, "Number of function returns inferred as noalias"); 49 STATISTIC(NumNoUndef, "Number of function returns inferred as noundef returns"); 50 STATISTIC(NumReturnedArg, "Number of arguments inferred as returned"); 51 STATISTIC(NumWillReturn, "Number of functions inferred as willreturn"); 52 STATISTIC(NumCold, "Number of functions inferred as cold"); 53 STATISTIC(NumNoReturn, "Number of functions inferred as no return"); 54 55 static bool setDoesNotAccessMemory(Function &F) { 56 if (F.doesNotAccessMemory()) 57 return false; 58 F.setDoesNotAccessMemory(); 59 ++NumReadNone; 60 return true; 61 } 62 63 static bool setIsCold(Function &F) { 64 if (F.hasFnAttribute(Attribute::Cold)) 65 return false; 66 F.addFnAttr(Attribute::Cold); 67 ++NumCold; 68 return true; 69 } 70 71 static bool setNoReturn(Function &F) { 72 if (F.hasFnAttribute(Attribute::NoReturn)) 73 return false; 74 F.addFnAttr(Attribute::NoReturn); 75 ++NumNoReturn; 76 return true; 77 } 78 79 static bool setOnlyAccessesInaccessibleMemory(Function &F) { 80 if (F.onlyAccessesInaccessibleMemory()) 81 return false; 82 F.setOnlyAccessesInaccessibleMemory(); 83 ++NumInaccessibleMemOnly; 84 return true; 85 } 86 87 static bool setOnlyReadsMemory(Function &F) { 88 if (F.onlyReadsMemory()) 89 return false; 90 F.setOnlyReadsMemory(); 91 ++NumReadOnly; 92 return true; 93 } 94 95 static bool setOnlyWritesMemory(Function &F) { 96 if (F.onlyWritesMemory()) // writeonly or readnone 97 return false; 98 ++NumWriteOnly; 99 F.setOnlyWritesMemory(); 100 return true; 101 } 102 103 static bool setOnlyAccessesArgMemory(Function &F) { 104 if (F.onlyAccessesArgMemory()) 105 return false; 106 F.setOnlyAccessesArgMemory(); 107 ++NumArgMemOnly; 108 return true; 109 } 110 111 static bool setOnlyAccessesInaccessibleMemOrArgMem(Function &F) { 112 if (F.onlyAccessesInaccessibleMemOrArgMem()) 113 return false; 114 F.setOnlyAccessesInaccessibleMemOrArgMem(); 115 ++NumInaccessibleMemOrArgMemOnly; 116 return true; 117 } 118 119 static bool setDoesNotThrow(Function &F) { 120 if (F.doesNotThrow()) 121 return false; 122 F.setDoesNotThrow(); 123 ++NumNoUnwind; 124 return true; 125 } 126 127 static bool setRetDoesNotAlias(Function &F) { 128 if (F.hasRetAttribute(Attribute::NoAlias)) 129 return false; 130 F.addRetAttr(Attribute::NoAlias); 131 ++NumNoAlias; 132 return true; 133 } 134 135 static bool setDoesNotCapture(Function &F, unsigned ArgNo) { 136 if (F.hasParamAttribute(ArgNo, Attribute::NoCapture)) 137 return false; 138 F.addParamAttr(ArgNo, Attribute::NoCapture); 139 ++NumNoCapture; 140 return true; 141 } 142 143 static bool setDoesNotAlias(Function &F, unsigned ArgNo) { 144 if (F.hasParamAttribute(ArgNo, Attribute::NoAlias)) 145 return false; 146 F.addParamAttr(ArgNo, Attribute::NoAlias); 147 ++NumNoAlias; 148 return true; 149 } 150 151 static bool setOnlyReadsMemory(Function &F, unsigned ArgNo) { 152 if (F.hasParamAttribute(ArgNo, Attribute::ReadOnly)) 153 return false; 154 F.addParamAttr(ArgNo, Attribute::ReadOnly); 155 ++NumReadOnlyArg; 156 return true; 157 } 158 159 static bool setOnlyWritesMemory(Function &F, unsigned ArgNo) { 160 if (F.hasParamAttribute(ArgNo, Attribute::WriteOnly)) 161 return false; 162 F.addParamAttr(ArgNo, Attribute::WriteOnly); 163 ++NumWriteOnlyArg; 164 return true; 165 } 166 167 static bool setRetNoUndef(Function &F) { 168 if (!F.getReturnType()->isVoidTy() && 169 !F.hasRetAttribute(Attribute::NoUndef)) { 170 F.addRetAttr(Attribute::NoUndef); 171 ++NumNoUndef; 172 return true; 173 } 174 return false; 175 } 176 177 static bool setArgsNoUndef(Function &F) { 178 bool Changed = false; 179 for (unsigned ArgNo = 0; ArgNo < F.arg_size(); ++ArgNo) { 180 if (!F.hasParamAttribute(ArgNo, Attribute::NoUndef)) { 181 F.addParamAttr(ArgNo, Attribute::NoUndef); 182 ++NumNoUndef; 183 Changed = true; 184 } 185 } 186 return Changed; 187 } 188 189 static bool setArgNoUndef(Function &F, unsigned ArgNo) { 190 if (F.hasParamAttribute(ArgNo, Attribute::NoUndef)) 191 return false; 192 F.addParamAttr(ArgNo, Attribute::NoUndef); 193 ++NumNoUndef; 194 return true; 195 } 196 197 static bool setRetAndArgsNoUndef(Function &F) { 198 bool UndefAdded = false; 199 UndefAdded |= setRetNoUndef(F); 200 UndefAdded |= setArgsNoUndef(F); 201 return UndefAdded; 202 } 203 204 static bool setReturnedArg(Function &F, unsigned ArgNo) { 205 if (F.hasParamAttribute(ArgNo, Attribute::Returned)) 206 return false; 207 F.addParamAttr(ArgNo, Attribute::Returned); 208 ++NumReturnedArg; 209 return true; 210 } 211 212 static bool setNonLazyBind(Function &F) { 213 if (F.hasFnAttribute(Attribute::NonLazyBind)) 214 return false; 215 F.addFnAttr(Attribute::NonLazyBind); 216 return true; 217 } 218 219 static bool setDoesNotFreeMemory(Function &F) { 220 if (F.hasFnAttribute(Attribute::NoFree)) 221 return false; 222 F.addFnAttr(Attribute::NoFree); 223 return true; 224 } 225 226 static bool setWillReturn(Function &F) { 227 if (F.hasFnAttribute(Attribute::WillReturn)) 228 return false; 229 F.addFnAttr(Attribute::WillReturn); 230 ++NumWillReturn; 231 return true; 232 } 233 234 static bool setAlignedAllocParam(Function &F, unsigned ArgNo) { 235 if (F.hasParamAttribute(ArgNo, Attribute::AllocAlign)) 236 return false; 237 F.addParamAttr(ArgNo, Attribute::AllocAlign); 238 return true; 239 } 240 241 static bool setAllocatedPointerParam(Function &F, unsigned ArgNo) { 242 if (F.hasParamAttribute(ArgNo, Attribute::AllocatedPointer)) 243 return false; 244 F.addParamAttr(ArgNo, Attribute::AllocatedPointer); 245 return true; 246 } 247 248 static bool setAllocSize(Function &F, unsigned ElemSizeArg, 249 std::optional<unsigned> NumElemsArg) { 250 if (F.hasFnAttribute(Attribute::AllocSize)) 251 return false; 252 F.addFnAttr(Attribute::getWithAllocSizeArgs(F.getContext(), ElemSizeArg, 253 NumElemsArg)); 254 return true; 255 } 256 257 static bool setAllocFamily(Function &F, StringRef Family) { 258 if (F.hasFnAttribute("alloc-family")) 259 return false; 260 F.addFnAttr("alloc-family", Family); 261 return true; 262 } 263 264 static bool setAllocKind(Function &F, AllocFnKind K) { 265 if (F.hasFnAttribute(Attribute::AllocKind)) 266 return false; 267 F.addFnAttr( 268 Attribute::get(F.getContext(), Attribute::AllocKind, uint64_t(K))); 269 return true; 270 } 271 272 bool llvm::inferNonMandatoryLibFuncAttrs(Module *M, StringRef Name, 273 const TargetLibraryInfo &TLI) { 274 Function *F = M->getFunction(Name); 275 if (!F) 276 return false; 277 return inferNonMandatoryLibFuncAttrs(*F, TLI); 278 } 279 280 bool llvm::inferNonMandatoryLibFuncAttrs(Function &F, 281 const TargetLibraryInfo &TLI) { 282 LibFunc TheLibFunc; 283 if (!(TLI.getLibFunc(F, TheLibFunc) && TLI.has(TheLibFunc))) 284 return false; 285 286 bool Changed = false; 287 288 if (F.getParent() != nullptr && F.getParent()->getRtLibUseGOT()) 289 Changed |= setNonLazyBind(F); 290 291 switch (TheLibFunc) { 292 case LibFunc_nan: 293 case LibFunc_nanf: 294 case LibFunc_nanl: 295 case LibFunc_strlen: 296 case LibFunc_strnlen: 297 case LibFunc_wcslen: 298 Changed |= setOnlyReadsMemory(F); 299 Changed |= setDoesNotThrow(F); 300 Changed |= setOnlyAccessesArgMemory(F); 301 Changed |= setWillReturn(F); 302 Changed |= setDoesNotCapture(F, 0); 303 break; 304 case LibFunc_strchr: 305 case LibFunc_strrchr: 306 Changed |= setOnlyAccessesArgMemory(F); 307 Changed |= setOnlyReadsMemory(F); 308 Changed |= setDoesNotThrow(F); 309 Changed |= setWillReturn(F); 310 break; 311 case LibFunc_strtol: 312 case LibFunc_strtod: 313 case LibFunc_strtof: 314 case LibFunc_strtoul: 315 case LibFunc_strtoll: 316 case LibFunc_strtold: 317 case LibFunc_strtoull: 318 Changed |= setDoesNotThrow(F); 319 Changed |= setWillReturn(F); 320 Changed |= setDoesNotCapture(F, 1); 321 Changed |= setOnlyReadsMemory(F, 0); 322 break; 323 case LibFunc_strcat: 324 case LibFunc_strncat: 325 Changed |= setOnlyAccessesArgMemory(F); 326 Changed |= setDoesNotThrow(F); 327 Changed |= setWillReturn(F); 328 Changed |= setReturnedArg(F, 0); 329 Changed |= setDoesNotCapture(F, 1); 330 Changed |= setOnlyReadsMemory(F, 1); 331 Changed |= setDoesNotAlias(F, 0); 332 Changed |= setDoesNotAlias(F, 1); 333 break; 334 case LibFunc_strcpy: 335 case LibFunc_strncpy: 336 Changed |= setReturnedArg(F, 0); 337 [[fallthrough]]; 338 case LibFunc_stpcpy: 339 case LibFunc_stpncpy: 340 Changed |= setOnlyAccessesArgMemory(F); 341 Changed |= setDoesNotThrow(F); 342 Changed |= setWillReturn(F); 343 Changed |= setDoesNotCapture(F, 1); 344 Changed |= setOnlyWritesMemory(F, 0); 345 Changed |= setOnlyReadsMemory(F, 1); 346 Changed |= setDoesNotAlias(F, 0); 347 Changed |= setDoesNotAlias(F, 1); 348 break; 349 case LibFunc_strxfrm: 350 Changed |= setDoesNotThrow(F); 351 Changed |= setWillReturn(F); 352 Changed |= setDoesNotCapture(F, 0); 353 Changed |= setDoesNotCapture(F, 1); 354 Changed |= setOnlyReadsMemory(F, 1); 355 break; 356 case LibFunc_strcmp: // 0,1 357 case LibFunc_strspn: // 0,1 358 case LibFunc_strncmp: // 0,1 359 case LibFunc_strcspn: // 0,1 360 Changed |= setDoesNotThrow(F); 361 Changed |= setOnlyAccessesArgMemory(F); 362 Changed |= setWillReturn(F); 363 Changed |= setOnlyReadsMemory(F); 364 Changed |= setDoesNotCapture(F, 0); 365 Changed |= setDoesNotCapture(F, 1); 366 break; 367 case LibFunc_strcoll: 368 case LibFunc_strcasecmp: // 0,1 369 case LibFunc_strncasecmp: // 370 // Those functions may depend on the locale, which may be accessed through 371 // global memory. 372 Changed |= setOnlyReadsMemory(F); 373 Changed |= setDoesNotThrow(F); 374 Changed |= setWillReturn(F); 375 Changed |= setDoesNotCapture(F, 0); 376 Changed |= setDoesNotCapture(F, 1); 377 break; 378 case LibFunc_strstr: 379 case LibFunc_strpbrk: 380 Changed |= setOnlyAccessesArgMemory(F); 381 Changed |= setOnlyReadsMemory(F); 382 Changed |= setDoesNotThrow(F); 383 Changed |= setWillReturn(F); 384 Changed |= setDoesNotCapture(F, 1); 385 break; 386 case LibFunc_strtok: 387 case LibFunc_strtok_r: 388 Changed |= setDoesNotThrow(F); 389 Changed |= setWillReturn(F); 390 Changed |= setDoesNotCapture(F, 1); 391 Changed |= setOnlyReadsMemory(F, 1); 392 break; 393 case LibFunc_scanf: 394 Changed |= setRetAndArgsNoUndef(F); 395 Changed |= setDoesNotThrow(F); 396 Changed |= setDoesNotCapture(F, 0); 397 Changed |= setOnlyReadsMemory(F, 0); 398 break; 399 case LibFunc_setbuf: 400 case LibFunc_setvbuf: 401 Changed |= setRetAndArgsNoUndef(F); 402 Changed |= setDoesNotThrow(F); 403 Changed |= setDoesNotCapture(F, 0); 404 break; 405 case LibFunc_strndup: 406 Changed |= setArgNoUndef(F, 1); 407 [[fallthrough]]; 408 case LibFunc_strdup: 409 Changed |= setAllocFamily(F, "malloc"); 410 Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F); 411 Changed |= setDoesNotThrow(F); 412 Changed |= setRetDoesNotAlias(F); 413 Changed |= setWillReturn(F); 414 Changed |= setDoesNotCapture(F, 0); 415 Changed |= setOnlyReadsMemory(F, 0); 416 break; 417 case LibFunc_stat: 418 case LibFunc_statvfs: 419 Changed |= setRetAndArgsNoUndef(F); 420 Changed |= setDoesNotThrow(F); 421 Changed |= setDoesNotCapture(F, 0); 422 Changed |= setDoesNotCapture(F, 1); 423 Changed |= setOnlyReadsMemory(F, 0); 424 break; 425 case LibFunc_sscanf: 426 Changed |= setRetAndArgsNoUndef(F); 427 Changed |= setDoesNotThrow(F); 428 Changed |= setDoesNotCapture(F, 0); 429 Changed |= setDoesNotCapture(F, 1); 430 Changed |= setOnlyReadsMemory(F, 0); 431 Changed |= setOnlyReadsMemory(F, 1); 432 break; 433 case LibFunc_sprintf: 434 Changed |= setRetAndArgsNoUndef(F); 435 Changed |= setDoesNotThrow(F); 436 Changed |= setDoesNotCapture(F, 0); 437 Changed |= setDoesNotAlias(F, 0); 438 Changed |= setOnlyWritesMemory(F, 0); 439 Changed |= setDoesNotCapture(F, 1); 440 Changed |= setOnlyReadsMemory(F, 1); 441 break; 442 case LibFunc_snprintf: 443 Changed |= setRetAndArgsNoUndef(F); 444 Changed |= setDoesNotThrow(F); 445 Changed |= setDoesNotCapture(F, 0); 446 Changed |= setDoesNotAlias(F, 0); 447 Changed |= setOnlyWritesMemory(F, 0); 448 Changed |= setDoesNotCapture(F, 2); 449 Changed |= setOnlyReadsMemory(F, 2); 450 break; 451 case LibFunc_setitimer: 452 Changed |= setRetAndArgsNoUndef(F); 453 Changed |= setDoesNotThrow(F); 454 Changed |= setWillReturn(F); 455 Changed |= setDoesNotCapture(F, 1); 456 Changed |= setDoesNotCapture(F, 2); 457 Changed |= setOnlyReadsMemory(F, 1); 458 break; 459 case LibFunc_system: 460 // May throw; "system" is a valid pthread cancellation point. 461 Changed |= setRetAndArgsNoUndef(F); 462 Changed |= setDoesNotCapture(F, 0); 463 Changed |= setOnlyReadsMemory(F, 0); 464 break; 465 case LibFunc_aligned_alloc: 466 Changed |= setAlignedAllocParam(F, 0); 467 Changed |= setAllocSize(F, 1, std::nullopt); 468 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Uninitialized | AllocFnKind::Aligned); 469 [[fallthrough]]; 470 case LibFunc_valloc: 471 case LibFunc_malloc: 472 case LibFunc_vec_malloc: 473 Changed |= setAllocFamily(F, TheLibFunc == LibFunc_vec_malloc ? "vec_malloc" 474 : "malloc"); 475 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Uninitialized); 476 Changed |= setAllocSize(F, 0, std::nullopt); 477 Changed |= setOnlyAccessesInaccessibleMemory(F); 478 Changed |= setRetAndArgsNoUndef(F); 479 Changed |= setDoesNotThrow(F); 480 Changed |= setRetDoesNotAlias(F); 481 Changed |= setWillReturn(F); 482 break; 483 case LibFunc_memcmp: 484 Changed |= setOnlyAccessesArgMemory(F); 485 Changed |= setOnlyReadsMemory(F); 486 Changed |= setDoesNotThrow(F); 487 Changed |= setWillReturn(F); 488 Changed |= setDoesNotCapture(F, 0); 489 Changed |= setDoesNotCapture(F, 1); 490 break; 491 case LibFunc_memchr: 492 case LibFunc_memrchr: 493 Changed |= setDoesNotThrow(F); 494 Changed |= setOnlyAccessesArgMemory(F); 495 Changed |= setOnlyReadsMemory(F); 496 Changed |= setWillReturn(F); 497 break; 498 case LibFunc_modf: 499 case LibFunc_modff: 500 case LibFunc_modfl: 501 Changed |= setDoesNotThrow(F); 502 Changed |= setWillReturn(F); 503 Changed |= setOnlyAccessesArgMemory(F); 504 Changed |= setOnlyWritesMemory(F); 505 Changed |= setDoesNotCapture(F, 1); 506 break; 507 case LibFunc_memcpy: 508 Changed |= setDoesNotThrow(F); 509 Changed |= setOnlyAccessesArgMemory(F); 510 Changed |= setWillReturn(F); 511 Changed |= setDoesNotAlias(F, 0); 512 Changed |= setReturnedArg(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_memmove: 519 Changed |= setDoesNotThrow(F); 520 Changed |= setOnlyAccessesArgMemory(F); 521 Changed |= setWillReturn(F); 522 Changed |= setReturnedArg(F, 0); 523 Changed |= setOnlyWritesMemory(F, 0); 524 Changed |= setDoesNotCapture(F, 1); 525 Changed |= setOnlyReadsMemory(F, 1); 526 break; 527 case LibFunc_mempcpy: 528 case LibFunc_memccpy: 529 Changed |= setWillReturn(F); 530 [[fallthrough]]; 531 case LibFunc_memcpy_chk: 532 Changed |= setDoesNotThrow(F); 533 Changed |= setOnlyAccessesArgMemory(F); 534 Changed |= setDoesNotAlias(F, 0); 535 Changed |= setOnlyWritesMemory(F, 0); 536 Changed |= setDoesNotAlias(F, 1); 537 Changed |= setDoesNotCapture(F, 1); 538 Changed |= setOnlyReadsMemory(F, 1); 539 break; 540 case LibFunc_memalign: 541 Changed |= setAllocFamily(F, "malloc"); 542 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Aligned | 543 AllocFnKind::Uninitialized); 544 Changed |= setAllocSize(F, 1, std::nullopt); 545 Changed |= setAlignedAllocParam(F, 0); 546 Changed |= setOnlyAccessesInaccessibleMemory(F); 547 Changed |= setRetNoUndef(F); 548 Changed |= setDoesNotThrow(F); 549 Changed |= setRetDoesNotAlias(F); 550 Changed |= setWillReturn(F); 551 break; 552 case LibFunc_mkdir: 553 Changed |= setRetAndArgsNoUndef(F); 554 Changed |= setDoesNotThrow(F); 555 Changed |= setDoesNotCapture(F, 0); 556 Changed |= setOnlyReadsMemory(F, 0); 557 break; 558 case LibFunc_mktime: 559 Changed |= setRetAndArgsNoUndef(F); 560 Changed |= setDoesNotThrow(F); 561 Changed |= setWillReturn(F); 562 Changed |= setDoesNotCapture(F, 0); 563 break; 564 case LibFunc_realloc: 565 case LibFunc_reallocf: 566 case LibFunc_vec_realloc: 567 Changed |= setAllocFamily( 568 F, TheLibFunc == LibFunc_vec_realloc ? "vec_malloc" : "malloc"); 569 Changed |= setAllocKind(F, AllocFnKind::Realloc); 570 Changed |= setAllocatedPointerParam(F, 0); 571 Changed |= setAllocSize(F, 1, std::nullopt); 572 Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F); 573 Changed |= setRetNoUndef(F); 574 Changed |= setDoesNotThrow(F); 575 Changed |= setRetDoesNotAlias(F); 576 Changed |= setWillReturn(F); 577 Changed |= setDoesNotCapture(F, 0); 578 Changed |= setArgNoUndef(F, 1); 579 break; 580 case LibFunc_read: 581 // May throw; "read" is a valid pthread cancellation point. 582 Changed |= setRetAndArgsNoUndef(F); 583 Changed |= setDoesNotCapture(F, 1); 584 break; 585 case LibFunc_rewind: 586 Changed |= setRetAndArgsNoUndef(F); 587 Changed |= setDoesNotThrow(F); 588 Changed |= setDoesNotCapture(F, 0); 589 break; 590 case LibFunc_rmdir: 591 case LibFunc_remove: 592 case LibFunc_realpath: 593 Changed |= setRetAndArgsNoUndef(F); 594 Changed |= setDoesNotThrow(F); 595 Changed |= setDoesNotCapture(F, 0); 596 Changed |= setOnlyReadsMemory(F, 0); 597 break; 598 case LibFunc_rename: 599 Changed |= setRetAndArgsNoUndef(F); 600 Changed |= setDoesNotThrow(F); 601 Changed |= setDoesNotCapture(F, 0); 602 Changed |= setDoesNotCapture(F, 1); 603 Changed |= setOnlyReadsMemory(F, 0); 604 Changed |= setOnlyReadsMemory(F, 1); 605 break; 606 case LibFunc_readlink: 607 Changed |= setRetAndArgsNoUndef(F); 608 Changed |= setDoesNotThrow(F); 609 Changed |= setDoesNotCapture(F, 0); 610 Changed |= setDoesNotCapture(F, 1); 611 Changed |= setOnlyReadsMemory(F, 0); 612 break; 613 case LibFunc_write: 614 // May throw; "write" is a valid pthread cancellation point. 615 Changed |= setRetAndArgsNoUndef(F); 616 Changed |= setDoesNotCapture(F, 1); 617 Changed |= setOnlyReadsMemory(F, 1); 618 break; 619 case LibFunc_bcopy: 620 Changed |= setDoesNotThrow(F); 621 Changed |= setOnlyAccessesArgMemory(F); 622 Changed |= setWillReturn(F); 623 Changed |= setDoesNotCapture(F, 0); 624 Changed |= setOnlyReadsMemory(F, 0); 625 Changed |= setOnlyWritesMemory(F, 1); 626 Changed |= setDoesNotCapture(F, 1); 627 break; 628 case LibFunc_bcmp: 629 Changed |= setDoesNotThrow(F); 630 Changed |= setOnlyAccessesArgMemory(F); 631 Changed |= setOnlyReadsMemory(F); 632 Changed |= setWillReturn(F); 633 Changed |= setDoesNotCapture(F, 0); 634 Changed |= setDoesNotCapture(F, 1); 635 break; 636 case LibFunc_bzero: 637 Changed |= setDoesNotThrow(F); 638 Changed |= setOnlyAccessesArgMemory(F); 639 Changed |= setWillReturn(F); 640 Changed |= setDoesNotCapture(F, 0); 641 Changed |= setOnlyWritesMemory(F, 0); 642 break; 643 case LibFunc_calloc: 644 case LibFunc_vec_calloc: 645 Changed |= setAllocFamily(F, TheLibFunc == LibFunc_vec_calloc ? "vec_malloc" 646 : "malloc"); 647 Changed |= setAllocKind(F, AllocFnKind::Alloc | AllocFnKind::Zeroed); 648 Changed |= setAllocSize(F, 0, 1); 649 Changed |= setOnlyAccessesInaccessibleMemory(F); 650 Changed |= setRetAndArgsNoUndef(F); 651 Changed |= setDoesNotThrow(F); 652 Changed |= setRetDoesNotAlias(F); 653 Changed |= setWillReturn(F); 654 break; 655 case LibFunc_chmod: 656 case LibFunc_chown: 657 Changed |= setRetAndArgsNoUndef(F); 658 Changed |= setDoesNotThrow(F); 659 Changed |= setDoesNotCapture(F, 0); 660 Changed |= setOnlyReadsMemory(F, 0); 661 break; 662 case LibFunc_ctermid: 663 case LibFunc_clearerr: 664 case LibFunc_closedir: 665 Changed |= setRetAndArgsNoUndef(F); 666 Changed |= setDoesNotThrow(F); 667 Changed |= setDoesNotCapture(F, 0); 668 break; 669 case LibFunc_atoi: 670 case LibFunc_atol: 671 case LibFunc_atof: 672 case LibFunc_atoll: 673 Changed |= setDoesNotThrow(F); 674 Changed |= setOnlyReadsMemory(F); 675 Changed |= setWillReturn(F); 676 Changed |= setDoesNotCapture(F, 0); 677 break; 678 case LibFunc_access: 679 Changed |= setRetAndArgsNoUndef(F); 680 Changed |= setDoesNotThrow(F); 681 Changed |= setDoesNotCapture(F, 0); 682 Changed |= setOnlyReadsMemory(F, 0); 683 break; 684 case LibFunc_fopen: 685 Changed |= setRetAndArgsNoUndef(F); 686 Changed |= setDoesNotThrow(F); 687 Changed |= setRetDoesNotAlias(F); 688 Changed |= setDoesNotCapture(F, 0); 689 Changed |= setDoesNotCapture(F, 1); 690 Changed |= setOnlyReadsMemory(F, 0); 691 Changed |= setOnlyReadsMemory(F, 1); 692 break; 693 case LibFunc_fdopen: 694 Changed |= setRetAndArgsNoUndef(F); 695 Changed |= setDoesNotThrow(F); 696 Changed |= setRetDoesNotAlias(F); 697 Changed |= setDoesNotCapture(F, 1); 698 Changed |= setOnlyReadsMemory(F, 1); 699 break; 700 case LibFunc_feof: 701 Changed |= setRetAndArgsNoUndef(F); 702 Changed |= setDoesNotThrow(F); 703 Changed |= setDoesNotCapture(F, 0); 704 break; 705 case LibFunc_free: 706 case LibFunc_vec_free: 707 Changed |= setAllocFamily(F, TheLibFunc == LibFunc_vec_free ? "vec_malloc" 708 : "malloc"); 709 Changed |= setAllocKind(F, AllocFnKind::Free); 710 Changed |= setAllocatedPointerParam(F, 0); 711 Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F); 712 Changed |= setArgsNoUndef(F); 713 Changed |= setDoesNotThrow(F); 714 Changed |= setWillReturn(F); 715 Changed |= setDoesNotCapture(F, 0); 716 break; 717 case LibFunc_fseek: 718 case LibFunc_ftell: 719 case LibFunc_fgetc: 720 case LibFunc_fgetc_unlocked: 721 case LibFunc_fseeko: 722 case LibFunc_ftello: 723 case LibFunc_fileno: 724 case LibFunc_fflush: 725 case LibFunc_fclose: 726 case LibFunc_fsetpos: 727 case LibFunc_flockfile: 728 case LibFunc_funlockfile: 729 case LibFunc_ftrylockfile: 730 Changed |= setRetAndArgsNoUndef(F); 731 Changed |= setDoesNotThrow(F); 732 Changed |= setDoesNotCapture(F, 0); 733 break; 734 case LibFunc_ferror: 735 Changed |= setRetAndArgsNoUndef(F); 736 Changed |= setDoesNotThrow(F); 737 Changed |= setDoesNotCapture(F, 0); 738 Changed |= setOnlyReadsMemory(F); 739 break; 740 case LibFunc_fputc: 741 case LibFunc_fputc_unlocked: 742 case LibFunc_fstat: 743 Changed |= setRetAndArgsNoUndef(F); 744 Changed |= setDoesNotThrow(F); 745 Changed |= setDoesNotCapture(F, 1); 746 break; 747 case LibFunc_frexp: 748 case LibFunc_frexpf: 749 case LibFunc_frexpl: 750 Changed |= setDoesNotThrow(F); 751 Changed |= setWillReturn(F); 752 Changed |= setOnlyAccessesArgMemory(F); 753 Changed |= setOnlyWritesMemory(F); 754 Changed |= setDoesNotCapture(F, 1); 755 break; 756 case LibFunc_fstatvfs: 757 Changed |= setRetAndArgsNoUndef(F); 758 Changed |= setDoesNotThrow(F); 759 Changed |= setDoesNotCapture(F, 1); 760 break; 761 case LibFunc_fgets: 762 case LibFunc_fgets_unlocked: 763 Changed |= setRetAndArgsNoUndef(F); 764 Changed |= setDoesNotThrow(F); 765 Changed |= setDoesNotCapture(F, 2); 766 break; 767 case LibFunc_fread: 768 case LibFunc_fread_unlocked: 769 Changed |= setRetAndArgsNoUndef(F); 770 Changed |= setDoesNotThrow(F); 771 Changed |= setDoesNotCapture(F, 0); 772 Changed |= setDoesNotCapture(F, 3); 773 break; 774 case LibFunc_fwrite: 775 case LibFunc_fwrite_unlocked: 776 Changed |= setRetAndArgsNoUndef(F); 777 Changed |= setDoesNotThrow(F); 778 Changed |= setDoesNotCapture(F, 0); 779 Changed |= setDoesNotCapture(F, 3); 780 // FIXME: readonly #1? 781 break; 782 case LibFunc_fputs: 783 case LibFunc_fputs_unlocked: 784 Changed |= setRetAndArgsNoUndef(F); 785 Changed |= setDoesNotThrow(F); 786 Changed |= setDoesNotCapture(F, 0); 787 Changed |= setDoesNotCapture(F, 1); 788 Changed |= setOnlyReadsMemory(F, 0); 789 break; 790 case LibFunc_fscanf: 791 case LibFunc_fprintf: 792 Changed |= setRetAndArgsNoUndef(F); 793 Changed |= setDoesNotThrow(F); 794 Changed |= setDoesNotCapture(F, 0); 795 Changed |= setDoesNotCapture(F, 1); 796 Changed |= setOnlyReadsMemory(F, 1); 797 break; 798 case LibFunc_fgetpos: 799 Changed |= setRetAndArgsNoUndef(F); 800 Changed |= setDoesNotThrow(F); 801 Changed |= setDoesNotCapture(F, 0); 802 Changed |= setDoesNotCapture(F, 1); 803 break; 804 case LibFunc_getc: 805 Changed |= setRetAndArgsNoUndef(F); 806 Changed |= setDoesNotThrow(F); 807 Changed |= setDoesNotCapture(F, 0); 808 break; 809 case LibFunc_getlogin_r: 810 Changed |= setRetAndArgsNoUndef(F); 811 Changed |= setDoesNotThrow(F); 812 Changed |= setDoesNotCapture(F, 0); 813 break; 814 case LibFunc_getc_unlocked: 815 Changed |= setRetAndArgsNoUndef(F); 816 Changed |= setDoesNotThrow(F); 817 Changed |= setDoesNotCapture(F, 0); 818 break; 819 case LibFunc_getenv: 820 Changed |= setRetAndArgsNoUndef(F); 821 Changed |= setDoesNotThrow(F); 822 Changed |= setOnlyReadsMemory(F); 823 Changed |= setDoesNotCapture(F, 0); 824 break; 825 case LibFunc_gets: 826 case LibFunc_getchar: 827 case LibFunc_getchar_unlocked: 828 Changed |= setRetAndArgsNoUndef(F); 829 Changed |= setDoesNotThrow(F); 830 break; 831 case LibFunc_getitimer: 832 Changed |= setRetAndArgsNoUndef(F); 833 Changed |= setDoesNotThrow(F); 834 Changed |= setDoesNotCapture(F, 1); 835 break; 836 case LibFunc_getpwnam: 837 Changed |= setRetAndArgsNoUndef(F); 838 Changed |= setDoesNotThrow(F); 839 Changed |= setDoesNotCapture(F, 0); 840 Changed |= setOnlyReadsMemory(F, 0); 841 break; 842 case LibFunc_ungetc: 843 Changed |= setRetAndArgsNoUndef(F); 844 Changed |= setDoesNotThrow(F); 845 Changed |= setDoesNotCapture(F, 1); 846 break; 847 case LibFunc_uname: 848 Changed |= setRetAndArgsNoUndef(F); 849 Changed |= setDoesNotThrow(F); 850 Changed |= setDoesNotCapture(F, 0); 851 break; 852 case LibFunc_unlink: 853 Changed |= setRetAndArgsNoUndef(F); 854 Changed |= setDoesNotThrow(F); 855 Changed |= setDoesNotCapture(F, 0); 856 Changed |= setOnlyReadsMemory(F, 0); 857 break; 858 case LibFunc_unsetenv: 859 Changed |= setRetAndArgsNoUndef(F); 860 Changed |= setDoesNotThrow(F); 861 Changed |= setDoesNotCapture(F, 0); 862 Changed |= setOnlyReadsMemory(F, 0); 863 break; 864 case LibFunc_utime: 865 case LibFunc_utimes: 866 Changed |= setRetAndArgsNoUndef(F); 867 Changed |= setDoesNotThrow(F); 868 Changed |= setDoesNotCapture(F, 0); 869 Changed |= setDoesNotCapture(F, 1); 870 Changed |= setOnlyReadsMemory(F, 0); 871 Changed |= setOnlyReadsMemory(F, 1); 872 break; 873 case LibFunc_putc: 874 case LibFunc_putc_unlocked: 875 Changed |= setRetAndArgsNoUndef(F); 876 Changed |= setDoesNotThrow(F); 877 Changed |= setDoesNotCapture(F, 1); 878 break; 879 case LibFunc_puts: 880 case LibFunc_printf: 881 case LibFunc_perror: 882 Changed |= setRetAndArgsNoUndef(F); 883 Changed |= setDoesNotThrow(F); 884 Changed |= setDoesNotCapture(F, 0); 885 Changed |= setOnlyReadsMemory(F, 0); 886 break; 887 case LibFunc_pread: 888 // May throw; "pread" is a valid pthread cancellation point. 889 Changed |= setRetAndArgsNoUndef(F); 890 Changed |= setDoesNotCapture(F, 1); 891 break; 892 case LibFunc_pwrite: 893 // May throw; "pwrite" is a valid pthread cancellation point. 894 Changed |= setRetAndArgsNoUndef(F); 895 Changed |= setDoesNotCapture(F, 1); 896 Changed |= setOnlyReadsMemory(F, 1); 897 break; 898 case LibFunc_putchar: 899 case LibFunc_putchar_unlocked: 900 Changed |= setRetAndArgsNoUndef(F); 901 Changed |= setDoesNotThrow(F); 902 break; 903 case LibFunc_popen: 904 Changed |= setRetAndArgsNoUndef(F); 905 Changed |= setDoesNotThrow(F); 906 Changed |= setRetDoesNotAlias(F); 907 Changed |= setDoesNotCapture(F, 0); 908 Changed |= setDoesNotCapture(F, 1); 909 Changed |= setOnlyReadsMemory(F, 0); 910 Changed |= setOnlyReadsMemory(F, 1); 911 break; 912 case LibFunc_pclose: 913 Changed |= setRetAndArgsNoUndef(F); 914 Changed |= setDoesNotThrow(F); 915 Changed |= setDoesNotCapture(F, 0); 916 break; 917 case LibFunc_vscanf: 918 Changed |= setRetAndArgsNoUndef(F); 919 Changed |= setDoesNotThrow(F); 920 Changed |= setDoesNotCapture(F, 0); 921 Changed |= setOnlyReadsMemory(F, 0); 922 break; 923 case LibFunc_vsscanf: 924 Changed |= setRetAndArgsNoUndef(F); 925 Changed |= setDoesNotThrow(F); 926 Changed |= setDoesNotCapture(F, 0); 927 Changed |= setDoesNotCapture(F, 1); 928 Changed |= setOnlyReadsMemory(F, 0); 929 Changed |= setOnlyReadsMemory(F, 1); 930 break; 931 case LibFunc_vfscanf: 932 Changed |= setRetAndArgsNoUndef(F); 933 Changed |= setDoesNotThrow(F); 934 Changed |= setDoesNotCapture(F, 0); 935 Changed |= setDoesNotCapture(F, 1); 936 Changed |= setOnlyReadsMemory(F, 1); 937 break; 938 case LibFunc_vprintf: 939 Changed |= setRetAndArgsNoUndef(F); 940 Changed |= setDoesNotThrow(F); 941 Changed |= setDoesNotCapture(F, 0); 942 Changed |= setOnlyReadsMemory(F, 0); 943 break; 944 case LibFunc_vfprintf: 945 case LibFunc_vsprintf: 946 Changed |= setRetAndArgsNoUndef(F); 947 Changed |= setDoesNotThrow(F); 948 Changed |= setDoesNotCapture(F, 0); 949 Changed |= setDoesNotCapture(F, 1); 950 Changed |= setOnlyReadsMemory(F, 1); 951 break; 952 case LibFunc_vsnprintf: 953 Changed |= setRetAndArgsNoUndef(F); 954 Changed |= setDoesNotThrow(F); 955 Changed |= setDoesNotCapture(F, 0); 956 Changed |= setDoesNotCapture(F, 2); 957 Changed |= setOnlyReadsMemory(F, 2); 958 break; 959 case LibFunc_open: 960 // May throw; "open" is a valid pthread cancellation point. 961 Changed |= setRetAndArgsNoUndef(F); 962 Changed |= setDoesNotCapture(F, 0); 963 Changed |= setOnlyReadsMemory(F, 0); 964 break; 965 case LibFunc_opendir: 966 Changed |= setRetAndArgsNoUndef(F); 967 Changed |= setDoesNotThrow(F); 968 Changed |= setRetDoesNotAlias(F); 969 Changed |= setDoesNotCapture(F, 0); 970 Changed |= setOnlyReadsMemory(F, 0); 971 break; 972 case LibFunc_tmpfile: 973 Changed |= setRetAndArgsNoUndef(F); 974 Changed |= setDoesNotThrow(F); 975 Changed |= setRetDoesNotAlias(F); 976 break; 977 case LibFunc_times: 978 Changed |= setRetAndArgsNoUndef(F); 979 Changed |= setDoesNotThrow(F); 980 Changed |= setDoesNotCapture(F, 0); 981 break; 982 case LibFunc_htonl: 983 case LibFunc_htons: 984 case LibFunc_ntohl: 985 case LibFunc_ntohs: 986 Changed |= setDoesNotThrow(F); 987 Changed |= setDoesNotAccessMemory(F); 988 break; 989 case LibFunc_lstat: 990 Changed |= setRetAndArgsNoUndef(F); 991 Changed |= setDoesNotThrow(F); 992 Changed |= setDoesNotCapture(F, 0); 993 Changed |= setDoesNotCapture(F, 1); 994 Changed |= setOnlyReadsMemory(F, 0); 995 break; 996 case LibFunc_lchown: 997 Changed |= setRetAndArgsNoUndef(F); 998 Changed |= setDoesNotThrow(F); 999 Changed |= setDoesNotCapture(F, 0); 1000 Changed |= setOnlyReadsMemory(F, 0); 1001 break; 1002 case LibFunc_qsort: 1003 // May throw; places call through function pointer. 1004 // Cannot give undef pointer/size 1005 Changed |= setRetAndArgsNoUndef(F); 1006 Changed |= setDoesNotCapture(F, 3); 1007 break; 1008 case LibFunc_dunder_strndup: 1009 Changed |= setArgNoUndef(F, 1); 1010 [[fallthrough]]; 1011 case LibFunc_dunder_strdup: 1012 Changed |= setDoesNotThrow(F); 1013 Changed |= setRetDoesNotAlias(F); 1014 Changed |= setWillReturn(F); 1015 Changed |= setDoesNotCapture(F, 0); 1016 Changed |= setOnlyReadsMemory(F, 0); 1017 break; 1018 case LibFunc_dunder_strtok_r: 1019 Changed |= setDoesNotThrow(F); 1020 Changed |= setDoesNotCapture(F, 1); 1021 Changed |= setOnlyReadsMemory(F, 1); 1022 break; 1023 case LibFunc_under_IO_getc: 1024 Changed |= setRetAndArgsNoUndef(F); 1025 Changed |= setDoesNotThrow(F); 1026 Changed |= setDoesNotCapture(F, 0); 1027 break; 1028 case LibFunc_under_IO_putc: 1029 Changed |= setRetAndArgsNoUndef(F); 1030 Changed |= setDoesNotThrow(F); 1031 Changed |= setDoesNotCapture(F, 1); 1032 break; 1033 case LibFunc_dunder_isoc99_scanf: 1034 Changed |= setRetAndArgsNoUndef(F); 1035 Changed |= setDoesNotThrow(F); 1036 Changed |= setDoesNotCapture(F, 0); 1037 Changed |= setOnlyReadsMemory(F, 0); 1038 break; 1039 case LibFunc_stat64: 1040 case LibFunc_lstat64: 1041 case LibFunc_statvfs64: 1042 Changed |= setRetAndArgsNoUndef(F); 1043 Changed |= setDoesNotThrow(F); 1044 Changed |= setDoesNotCapture(F, 0); 1045 Changed |= setDoesNotCapture(F, 1); 1046 Changed |= setOnlyReadsMemory(F, 0); 1047 break; 1048 case LibFunc_dunder_isoc99_sscanf: 1049 Changed |= setRetAndArgsNoUndef(F); 1050 Changed |= setDoesNotThrow(F); 1051 Changed |= setDoesNotCapture(F, 0); 1052 Changed |= setDoesNotCapture(F, 1); 1053 Changed |= setOnlyReadsMemory(F, 0); 1054 Changed |= setOnlyReadsMemory(F, 1); 1055 break; 1056 case LibFunc_fopen64: 1057 Changed |= setRetAndArgsNoUndef(F); 1058 Changed |= setDoesNotThrow(F); 1059 Changed |= setRetDoesNotAlias(F); 1060 Changed |= setDoesNotCapture(F, 0); 1061 Changed |= setDoesNotCapture(F, 1); 1062 Changed |= setOnlyReadsMemory(F, 0); 1063 Changed |= setOnlyReadsMemory(F, 1); 1064 break; 1065 case LibFunc_fseeko64: 1066 case LibFunc_ftello64: 1067 Changed |= setRetAndArgsNoUndef(F); 1068 Changed |= setDoesNotThrow(F); 1069 Changed |= setDoesNotCapture(F, 0); 1070 break; 1071 case LibFunc_tmpfile64: 1072 Changed |= setRetAndArgsNoUndef(F); 1073 Changed |= setDoesNotThrow(F); 1074 Changed |= setRetDoesNotAlias(F); 1075 break; 1076 case LibFunc_fstat64: 1077 case LibFunc_fstatvfs64: 1078 Changed |= setRetAndArgsNoUndef(F); 1079 Changed |= setDoesNotThrow(F); 1080 Changed |= setDoesNotCapture(F, 1); 1081 break; 1082 case LibFunc_open64: 1083 // May throw; "open" is a valid pthread cancellation point. 1084 Changed |= setRetAndArgsNoUndef(F); 1085 Changed |= setDoesNotCapture(F, 0); 1086 Changed |= setOnlyReadsMemory(F, 0); 1087 break; 1088 case LibFunc_gettimeofday: 1089 // Currently some platforms have the restrict keyword on the arguments to 1090 // gettimeofday. To be conservative, do not add noalias to gettimeofday's 1091 // arguments. 1092 Changed |= setRetAndArgsNoUndef(F); 1093 Changed |= setDoesNotThrow(F); 1094 Changed |= setDoesNotCapture(F, 0); 1095 Changed |= setDoesNotCapture(F, 1); 1096 break; 1097 case LibFunc_memset_pattern4: 1098 case LibFunc_memset_pattern8: 1099 case LibFunc_memset_pattern16: 1100 Changed |= setDoesNotCapture(F, 0); 1101 Changed |= setDoesNotCapture(F, 1); 1102 Changed |= setOnlyReadsMemory(F, 1); 1103 [[fallthrough]]; 1104 case LibFunc_memset: 1105 Changed |= setWillReturn(F); 1106 [[fallthrough]]; 1107 case LibFunc_memset_chk: 1108 Changed |= setOnlyAccessesArgMemory(F); 1109 Changed |= setOnlyWritesMemory(F, 0); 1110 Changed |= setDoesNotThrow(F); 1111 break; 1112 case LibFunc_abort: 1113 Changed |= setIsCold(F); 1114 break; 1115 case LibFunc_terminate: 1116 Changed |= setIsCold(F); 1117 Changed |= setNoReturn(F); 1118 break; 1119 case LibFunc_cxa_throw: 1120 Changed |= setIsCold(F); 1121 Changed |= setNoReturn(F); 1122 // Don't add `nofree` on `__cxa_throw` 1123 return Changed; 1124 // int __nvvm_reflect(const char *) 1125 case LibFunc_nvvm_reflect: 1126 Changed |= setRetAndArgsNoUndef(F); 1127 Changed |= setDoesNotAccessMemory(F); 1128 Changed |= setDoesNotThrow(F); 1129 break; 1130 case LibFunc_ldexp: 1131 case LibFunc_ldexpf: 1132 case LibFunc_ldexpl: 1133 Changed |= setWillReturn(F); 1134 break; 1135 case LibFunc_remquo: 1136 case LibFunc_remquof: 1137 case LibFunc_remquol: 1138 Changed |= setDoesNotCapture(F, 2); 1139 [[fallthrough]]; 1140 case LibFunc_abs: 1141 case LibFunc_acos: 1142 case LibFunc_acosf: 1143 case LibFunc_acosh: 1144 case LibFunc_acoshf: 1145 case LibFunc_acoshl: 1146 case LibFunc_acosl: 1147 case LibFunc_asin: 1148 case LibFunc_asinf: 1149 case LibFunc_asinh: 1150 case LibFunc_asinhf: 1151 case LibFunc_asinhl: 1152 case LibFunc_asinl: 1153 case LibFunc_atan: 1154 case LibFunc_atan2: 1155 case LibFunc_atan2f: 1156 case LibFunc_atan2l: 1157 case LibFunc_atanf: 1158 case LibFunc_atanh: 1159 case LibFunc_atanhf: 1160 case LibFunc_atanhl: 1161 case LibFunc_atanl: 1162 case LibFunc_cbrt: 1163 case LibFunc_cbrtf: 1164 case LibFunc_cbrtl: 1165 case LibFunc_ceil: 1166 case LibFunc_ceilf: 1167 case LibFunc_ceill: 1168 case LibFunc_copysign: 1169 case LibFunc_copysignf: 1170 case LibFunc_copysignl: 1171 case LibFunc_cos: 1172 case LibFunc_cosh: 1173 case LibFunc_coshf: 1174 case LibFunc_coshl: 1175 case LibFunc_cosf: 1176 case LibFunc_cosl: 1177 case LibFunc_cospi: 1178 case LibFunc_cospif: 1179 case LibFunc_erf: 1180 case LibFunc_erff: 1181 case LibFunc_erfl: 1182 case LibFunc_exp: 1183 case LibFunc_expf: 1184 case LibFunc_expl: 1185 case LibFunc_exp2: 1186 case LibFunc_exp2f: 1187 case LibFunc_exp2l: 1188 case LibFunc_expm1: 1189 case LibFunc_expm1f: 1190 case LibFunc_expm1l: 1191 case LibFunc_fabs: 1192 case LibFunc_fabsf: 1193 case LibFunc_fabsl: 1194 case LibFunc_fdim: 1195 case LibFunc_fdiml: 1196 case LibFunc_fdimf: 1197 case LibFunc_ffs: 1198 case LibFunc_ffsl: 1199 case LibFunc_ffsll: 1200 case LibFunc_floor: 1201 case LibFunc_floorf: 1202 case LibFunc_floorl: 1203 case LibFunc_fls: 1204 case LibFunc_flsl: 1205 case LibFunc_flsll: 1206 case LibFunc_fmax: 1207 case LibFunc_fmaxf: 1208 case LibFunc_fmaxl: 1209 case LibFunc_fmin: 1210 case LibFunc_fminf: 1211 case LibFunc_fminl: 1212 case LibFunc_fmod: 1213 case LibFunc_fmodf: 1214 case LibFunc_fmodl: 1215 case LibFunc_isascii: 1216 case LibFunc_isdigit: 1217 case LibFunc_labs: 1218 case LibFunc_llabs: 1219 case LibFunc_log: 1220 case LibFunc_log10: 1221 case LibFunc_log10f: 1222 case LibFunc_log10l: 1223 case LibFunc_log1p: 1224 case LibFunc_log1pf: 1225 case LibFunc_log1pl: 1226 case LibFunc_log2: 1227 case LibFunc_log2f: 1228 case LibFunc_log2l: 1229 case LibFunc_logb: 1230 case LibFunc_logbf: 1231 case LibFunc_logbl: 1232 case LibFunc_logf: 1233 case LibFunc_logl: 1234 case LibFunc_nearbyint: 1235 case LibFunc_nearbyintf: 1236 case LibFunc_nearbyintl: 1237 case LibFunc_pow: 1238 case LibFunc_powf: 1239 case LibFunc_powl: 1240 case LibFunc_remainder: 1241 case LibFunc_remainderf: 1242 case LibFunc_remainderl: 1243 case LibFunc_rint: 1244 case LibFunc_rintf: 1245 case LibFunc_rintl: 1246 case LibFunc_round: 1247 case LibFunc_roundf: 1248 case LibFunc_roundl: 1249 case LibFunc_sin: 1250 case LibFunc_sincospif_stret: 1251 case LibFunc_sinf: 1252 case LibFunc_sinh: 1253 case LibFunc_sinhf: 1254 case LibFunc_sinhl: 1255 case LibFunc_sinl: 1256 case LibFunc_sinpi: 1257 case LibFunc_sinpif: 1258 case LibFunc_sqrt: 1259 case LibFunc_sqrtf: 1260 case LibFunc_sqrtl: 1261 case LibFunc_tan: 1262 case LibFunc_tanf: 1263 case LibFunc_tanh: 1264 case LibFunc_tanhf: 1265 case LibFunc_tanhl: 1266 case LibFunc_tanl: 1267 case LibFunc_toascii: 1268 case LibFunc_trunc: 1269 case LibFunc_truncf: 1270 case LibFunc_truncl: 1271 Changed |= setDoesNotThrow(F); 1272 Changed |= setDoesNotFreeMemory(F); 1273 Changed |= setOnlyWritesMemory(F); 1274 Changed |= setWillReturn(F); 1275 break; 1276 case LibFunc_sincos: 1277 case LibFunc_sincosf: 1278 case LibFunc_sincosl: 1279 Changed |= setDoesNotThrow(F); 1280 Changed |= setDoesNotFreeMemory(F); 1281 Changed |= setOnlyWritesMemory(F); 1282 Changed |= setOnlyWritesMemory(F, 1); 1283 Changed |= setOnlyWritesMemory(F, 2); 1284 Changed |= setDoesNotCapture(F, 1); 1285 Changed |= setDoesNotCapture(F, 2); 1286 Changed |= setWillReturn(F); 1287 break; 1288 default: 1289 // FIXME: It'd be really nice to cover all the library functions we're 1290 // aware of here. 1291 break; 1292 } 1293 // We have to do this step after AllocKind has been inferred on functions so 1294 // we can reliably identify free-like and realloc-like functions. 1295 if (!isLibFreeFunction(&F, TheLibFunc) && !isReallocLikeFn(&F)) 1296 Changed |= setDoesNotFreeMemory(F); 1297 return Changed; 1298 } 1299 1300 static void setArgExtAttr(Function &F, unsigned ArgNo, 1301 const TargetLibraryInfo &TLI, bool Signed = true) { 1302 Attribute::AttrKind ExtAttr = TLI.getExtAttrForI32Param(Signed); 1303 if (ExtAttr != Attribute::None && !F.hasParamAttribute(ArgNo, ExtAttr)) 1304 F.addParamAttr(ArgNo, ExtAttr); 1305 } 1306 1307 static void setRetExtAttr(Function &F, 1308 const TargetLibraryInfo &TLI, bool Signed = true) { 1309 Attribute::AttrKind ExtAttr = TLI.getExtAttrForI32Return(Signed); 1310 if (ExtAttr != Attribute::None && !F.hasRetAttribute(ExtAttr)) 1311 F.addRetAttr(ExtAttr); 1312 } 1313 1314 // Modeled after X86TargetLowering::markLibCallAttributes. 1315 void llvm::markRegisterParameterAttributes(Function *F) { 1316 if (!F->arg_size() || F->isVarArg()) 1317 return; 1318 1319 const CallingConv::ID CC = F->getCallingConv(); 1320 if (CC != CallingConv::C && CC != CallingConv::X86_StdCall) 1321 return; 1322 1323 const Module *M = F->getParent(); 1324 unsigned N = M->getNumberRegisterParameters(); 1325 if (!N) 1326 return; 1327 1328 const DataLayout &DL = M->getDataLayout(); 1329 1330 for (Argument &A : F->args()) { 1331 Type *T = A.getType(); 1332 if (!T->isIntOrPtrTy()) 1333 continue; 1334 1335 const TypeSize &TS = DL.getTypeAllocSize(T); 1336 if (TS > 8) 1337 continue; 1338 1339 assert(TS <= 4 && "Need to account for parameters larger than word size"); 1340 const unsigned NumRegs = TS > 4 ? 2 : 1; 1341 if (N < NumRegs) 1342 return; 1343 1344 N -= NumRegs; 1345 F->addParamAttr(A.getArgNo(), Attribute::InReg); 1346 } 1347 } 1348 1349 FunctionCallee llvm::getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI, 1350 LibFunc TheLibFunc, FunctionType *T, 1351 AttributeList AttributeList) { 1352 assert(TLI.has(TheLibFunc) && 1353 "Creating call to non-existing library function."); 1354 StringRef Name = TLI.getName(TheLibFunc); 1355 FunctionCallee C = M->getOrInsertFunction(Name, T, AttributeList); 1356 1357 // Make sure any mandatory argument attributes are added. 1358 1359 // Any outgoing i32 argument should be handled with setArgExtAttr() which 1360 // will add an extension attribute if the target ABI requires it. Adding 1361 // argument extensions is typically done by the front end but when an 1362 // optimizer is building a library call on its own it has to take care of 1363 // this. Each such generated function must be handled here with sign or 1364 // zero extensions as needed. F is retreived with cast<> because we demand 1365 // of the caller to have called isLibFuncEmittable() first. 1366 Function *F = cast<Function>(C.getCallee()); 1367 assert(F->getFunctionType() == T && "Function type does not match."); 1368 switch (TheLibFunc) { 1369 case LibFunc_fputc: 1370 case LibFunc_putchar: 1371 setArgExtAttr(*F, 0, TLI); 1372 break; 1373 case LibFunc_ldexp: 1374 case LibFunc_ldexpf: 1375 case LibFunc_ldexpl: 1376 case LibFunc_memchr: 1377 case LibFunc_memrchr: 1378 case LibFunc_strchr: 1379 setArgExtAttr(*F, 1, TLI); 1380 break; 1381 case LibFunc_memccpy: 1382 setArgExtAttr(*F, 2, TLI); 1383 break; 1384 1385 // These are functions that are known to not need any argument extension 1386 // on any target: A size_t argument (which may be an i32 on some targets) 1387 // should not trigger the assert below. 1388 case LibFunc_bcmp: 1389 setRetExtAttr(*F, TLI); 1390 break; 1391 case LibFunc_calloc: 1392 case LibFunc_fwrite: 1393 case LibFunc_malloc: 1394 case LibFunc_memcmp: 1395 case LibFunc_memcpy_chk: 1396 case LibFunc_mempcpy: 1397 case LibFunc_memset_pattern16: 1398 case LibFunc_snprintf: 1399 case LibFunc_stpncpy: 1400 case LibFunc_strlcat: 1401 case LibFunc_strlcpy: 1402 case LibFunc_strncat: 1403 case LibFunc_strncmp: 1404 case LibFunc_strncpy: 1405 case LibFunc_vsnprintf: 1406 break; 1407 1408 default: 1409 #ifndef NDEBUG 1410 for (unsigned i = 0; i < T->getNumParams(); i++) 1411 assert(!isa<IntegerType>(T->getParamType(i)) && 1412 "Unhandled integer argument."); 1413 #endif 1414 break; 1415 } 1416 1417 markRegisterParameterAttributes(F); 1418 1419 return C; 1420 } 1421 1422 FunctionCallee llvm::getOrInsertLibFunc(Module *M, const TargetLibraryInfo &TLI, 1423 LibFunc TheLibFunc, FunctionType *T) { 1424 return getOrInsertLibFunc(M, TLI, TheLibFunc, T, AttributeList()); 1425 } 1426 1427 bool llvm::isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI, 1428 LibFunc TheLibFunc) { 1429 StringRef FuncName = TLI->getName(TheLibFunc); 1430 if (!TLI->has(TheLibFunc)) 1431 return false; 1432 1433 // Check if the Module already has a GlobalValue with the same name, in 1434 // which case it must be a Function with the expected type. 1435 if (GlobalValue *GV = M->getNamedValue(FuncName)) { 1436 if (auto *F = dyn_cast<Function>(GV)) 1437 return TLI->isValidProtoForLibFunc(*F->getFunctionType(), TheLibFunc, *M); 1438 return false; 1439 } 1440 1441 return true; 1442 } 1443 1444 bool llvm::isLibFuncEmittable(const Module *M, const TargetLibraryInfo *TLI, 1445 StringRef Name) { 1446 LibFunc TheLibFunc; 1447 return TLI->getLibFunc(Name, TheLibFunc) && 1448 isLibFuncEmittable(M, TLI, TheLibFunc); 1449 } 1450 1451 bool llvm::hasFloatFn(const Module *M, const TargetLibraryInfo *TLI, Type *Ty, 1452 LibFunc DoubleFn, LibFunc FloatFn, LibFunc LongDoubleFn) { 1453 switch (Ty->getTypeID()) { 1454 case Type::HalfTyID: 1455 return false; 1456 case Type::FloatTyID: 1457 return isLibFuncEmittable(M, TLI, FloatFn); 1458 case Type::DoubleTyID: 1459 return isLibFuncEmittable(M, TLI, DoubleFn); 1460 default: 1461 return isLibFuncEmittable(M, TLI, LongDoubleFn); 1462 } 1463 } 1464 1465 StringRef llvm::getFloatFn(const Module *M, const TargetLibraryInfo *TLI, 1466 Type *Ty, LibFunc DoubleFn, LibFunc FloatFn, 1467 LibFunc LongDoubleFn, LibFunc &TheLibFunc) { 1468 assert(hasFloatFn(M, TLI, Ty, DoubleFn, FloatFn, LongDoubleFn) && 1469 "Cannot get name for unavailable function!"); 1470 1471 switch (Ty->getTypeID()) { 1472 case Type::HalfTyID: 1473 llvm_unreachable("No name for HalfTy!"); 1474 case Type::FloatTyID: 1475 TheLibFunc = FloatFn; 1476 return TLI->getName(FloatFn); 1477 case Type::DoubleTyID: 1478 TheLibFunc = DoubleFn; 1479 return TLI->getName(DoubleFn); 1480 default: 1481 TheLibFunc = LongDoubleFn; 1482 return TLI->getName(LongDoubleFn); 1483 } 1484 } 1485 1486 //- Emit LibCalls ------------------------------------------------------------// 1487 1488 static IntegerType *getIntTy(IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1489 return B.getIntNTy(TLI->getIntSize()); 1490 } 1491 1492 static IntegerType *getSizeTTy(IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1493 const Module *M = B.GetInsertBlock()->getModule(); 1494 return B.getIntNTy(TLI->getSizeTSize(*M)); 1495 } 1496 1497 static Value *emitLibCall(LibFunc TheLibFunc, Type *ReturnType, 1498 ArrayRef<Type *> ParamTypes, 1499 ArrayRef<Value *> Operands, IRBuilderBase &B, 1500 const TargetLibraryInfo *TLI, 1501 bool IsVaArgs = false) { 1502 Module *M = B.GetInsertBlock()->getModule(); 1503 if (!isLibFuncEmittable(M, TLI, TheLibFunc)) 1504 return nullptr; 1505 1506 StringRef FuncName = TLI->getName(TheLibFunc); 1507 FunctionType *FuncType = FunctionType::get(ReturnType, ParamTypes, IsVaArgs); 1508 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, FuncType); 1509 inferNonMandatoryLibFuncAttrs(M, FuncName, *TLI); 1510 CallInst *CI = B.CreateCall(Callee, Operands, FuncName); 1511 if (const Function *F = 1512 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1513 CI->setCallingConv(F->getCallingConv()); 1514 return CI; 1515 } 1516 1517 Value *llvm::emitStrLen(Value *Ptr, IRBuilderBase &B, const DataLayout &DL, 1518 const TargetLibraryInfo *TLI) { 1519 Type *CharPtrTy = B.getPtrTy(); 1520 Type *SizeTTy = getSizeTTy(B, TLI); 1521 return emitLibCall(LibFunc_strlen, SizeTTy, CharPtrTy, Ptr, B, TLI); 1522 } 1523 1524 Value *llvm::emitStrDup(Value *Ptr, IRBuilderBase &B, 1525 const TargetLibraryInfo *TLI) { 1526 Type *CharPtrTy = B.getPtrTy(); 1527 return emitLibCall(LibFunc_strdup, CharPtrTy, CharPtrTy, Ptr, B, TLI); 1528 } 1529 1530 Value *llvm::emitStrChr(Value *Ptr, char C, IRBuilderBase &B, 1531 const TargetLibraryInfo *TLI) { 1532 Type *CharPtrTy = B.getPtrTy(); 1533 Type *IntTy = getIntTy(B, TLI); 1534 return emitLibCall(LibFunc_strchr, CharPtrTy, {CharPtrTy, IntTy}, 1535 {Ptr, ConstantInt::get(IntTy, C)}, B, TLI); 1536 } 1537 1538 Value *llvm::emitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1539 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1540 Type *CharPtrTy = B.getPtrTy(); 1541 Type *IntTy = getIntTy(B, TLI); 1542 Type *SizeTTy = getSizeTTy(B, TLI); 1543 return emitLibCall( 1544 LibFunc_strncmp, IntTy, 1545 {CharPtrTy, CharPtrTy, SizeTTy}, 1546 {Ptr1, Ptr2, Len}, B, TLI); 1547 } 1548 1549 Value *llvm::emitStrCpy(Value *Dst, Value *Src, IRBuilderBase &B, 1550 const TargetLibraryInfo *TLI) { 1551 Type *CharPtrTy = Dst->getType(); 1552 return emitLibCall(LibFunc_strcpy, CharPtrTy, {CharPtrTy, CharPtrTy}, 1553 {Dst, Src}, B, TLI); 1554 } 1555 1556 Value *llvm::emitStpCpy(Value *Dst, Value *Src, IRBuilderBase &B, 1557 const TargetLibraryInfo *TLI) { 1558 Type *CharPtrTy = B.getPtrTy(); 1559 return emitLibCall(LibFunc_stpcpy, CharPtrTy, {CharPtrTy, CharPtrTy}, 1560 {Dst, Src}, B, TLI); 1561 } 1562 1563 Value *llvm::emitStrNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1564 const TargetLibraryInfo *TLI) { 1565 Type *CharPtrTy = B.getPtrTy(); 1566 Type *SizeTTy = getSizeTTy(B, TLI); 1567 return emitLibCall(LibFunc_strncpy, CharPtrTy, {CharPtrTy, CharPtrTy, SizeTTy}, 1568 {Dst, Src, Len}, B, TLI); 1569 } 1570 1571 Value *llvm::emitStpNCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1572 const TargetLibraryInfo *TLI) { 1573 Type *CharPtrTy = B.getPtrTy(); 1574 Type *SizeTTy = getSizeTTy(B, TLI); 1575 return emitLibCall(LibFunc_stpncpy, CharPtrTy, {CharPtrTy, CharPtrTy, SizeTTy}, 1576 {Dst, Src, Len}, B, TLI); 1577 } 1578 1579 Value *llvm::emitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize, 1580 IRBuilderBase &B, const DataLayout &DL, 1581 const TargetLibraryInfo *TLI) { 1582 Module *M = B.GetInsertBlock()->getModule(); 1583 if (!isLibFuncEmittable(M, TLI, LibFunc_memcpy_chk)) 1584 return nullptr; 1585 1586 AttributeList AS; 1587 AS = AttributeList::get(M->getContext(), AttributeList::FunctionIndex, 1588 Attribute::NoUnwind); 1589 Type *VoidPtrTy = B.getPtrTy(); 1590 Type *SizeTTy = getSizeTTy(B, TLI); 1591 FunctionCallee MemCpy = getOrInsertLibFunc(M, *TLI, LibFunc_memcpy_chk, 1592 AttributeList::get(M->getContext(), AS), VoidPtrTy, 1593 VoidPtrTy, VoidPtrTy, SizeTTy, SizeTTy); 1594 CallInst *CI = B.CreateCall(MemCpy, {Dst, Src, Len, ObjSize}); 1595 if (const Function *F = 1596 dyn_cast<Function>(MemCpy.getCallee()->stripPointerCasts())) 1597 CI->setCallingConv(F->getCallingConv()); 1598 return CI; 1599 } 1600 1601 Value *llvm::emitMemPCpy(Value *Dst, Value *Src, Value *Len, IRBuilderBase &B, 1602 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1603 Type *VoidPtrTy = B.getPtrTy(); 1604 Type *SizeTTy = getSizeTTy(B, TLI); 1605 return emitLibCall(LibFunc_mempcpy, VoidPtrTy, 1606 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1607 {Dst, Src, Len}, B, TLI); 1608 } 1609 1610 Value *llvm::emitMemChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B, 1611 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1612 Type *VoidPtrTy = B.getPtrTy(); 1613 Type *IntTy = getIntTy(B, TLI); 1614 Type *SizeTTy = getSizeTTy(B, TLI); 1615 return emitLibCall(LibFunc_memchr, VoidPtrTy, 1616 {VoidPtrTy, IntTy, SizeTTy}, 1617 {Ptr, Val, Len}, B, TLI); 1618 } 1619 1620 Value *llvm::emitMemRChr(Value *Ptr, Value *Val, Value *Len, IRBuilderBase &B, 1621 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1622 Type *VoidPtrTy = B.getPtrTy(); 1623 Type *IntTy = getIntTy(B, TLI); 1624 Type *SizeTTy = getSizeTTy(B, TLI); 1625 return emitLibCall(LibFunc_memrchr, VoidPtrTy, 1626 {VoidPtrTy, IntTy, SizeTTy}, 1627 {Ptr, Val, Len}, B, TLI); 1628 } 1629 1630 Value *llvm::emitMemCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1631 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1632 Type *VoidPtrTy = B.getPtrTy(); 1633 Type *IntTy = getIntTy(B, TLI); 1634 Type *SizeTTy = getSizeTTy(B, TLI); 1635 return emitLibCall(LibFunc_memcmp, IntTy, 1636 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1637 {Ptr1, Ptr2, Len}, B, TLI); 1638 } 1639 1640 Value *llvm::emitBCmp(Value *Ptr1, Value *Ptr2, Value *Len, IRBuilderBase &B, 1641 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1642 Type *VoidPtrTy = B.getPtrTy(); 1643 Type *IntTy = getIntTy(B, TLI); 1644 Type *SizeTTy = getSizeTTy(B, TLI); 1645 return emitLibCall(LibFunc_bcmp, IntTy, 1646 {VoidPtrTy, VoidPtrTy, SizeTTy}, 1647 {Ptr1, Ptr2, Len}, B, TLI); 1648 } 1649 1650 Value *llvm::emitMemCCpy(Value *Ptr1, Value *Ptr2, Value *Val, Value *Len, 1651 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1652 Type *VoidPtrTy = B.getPtrTy(); 1653 Type *IntTy = getIntTy(B, TLI); 1654 Type *SizeTTy = getSizeTTy(B, TLI); 1655 return emitLibCall(LibFunc_memccpy, VoidPtrTy, 1656 {VoidPtrTy, VoidPtrTy, IntTy, SizeTTy}, 1657 {Ptr1, Ptr2, Val, Len}, B, TLI); 1658 } 1659 1660 Value *llvm::emitSNPrintf(Value *Dest, Value *Size, Value *Fmt, 1661 ArrayRef<Value *> VariadicArgs, IRBuilderBase &B, 1662 const TargetLibraryInfo *TLI) { 1663 Type *CharPtrTy = B.getPtrTy(); 1664 Type *IntTy = getIntTy(B, TLI); 1665 Type *SizeTTy = getSizeTTy(B, TLI); 1666 SmallVector<Value *, 8> Args{Dest, Size, Fmt}; 1667 llvm::append_range(Args, VariadicArgs); 1668 return emitLibCall(LibFunc_snprintf, IntTy, 1669 {CharPtrTy, SizeTTy, CharPtrTy}, 1670 Args, B, TLI, /*IsVaArgs=*/true); 1671 } 1672 1673 Value *llvm::emitSPrintf(Value *Dest, Value *Fmt, 1674 ArrayRef<Value *> VariadicArgs, IRBuilderBase &B, 1675 const TargetLibraryInfo *TLI) { 1676 Type *CharPtrTy = B.getPtrTy(); 1677 Type *IntTy = getIntTy(B, TLI); 1678 SmallVector<Value *, 8> Args{Dest, Fmt}; 1679 llvm::append_range(Args, VariadicArgs); 1680 return emitLibCall(LibFunc_sprintf, IntTy, 1681 {CharPtrTy, CharPtrTy}, Args, B, TLI, 1682 /*IsVaArgs=*/true); 1683 } 1684 1685 Value *llvm::emitStrCat(Value *Dest, Value *Src, IRBuilderBase &B, 1686 const TargetLibraryInfo *TLI) { 1687 Type *CharPtrTy = B.getPtrTy(); 1688 return emitLibCall(LibFunc_strcat, CharPtrTy, 1689 {CharPtrTy, CharPtrTy}, 1690 {Dest, Src}, B, TLI); 1691 } 1692 1693 Value *llvm::emitStrLCpy(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1694 const TargetLibraryInfo *TLI) { 1695 Type *CharPtrTy = B.getPtrTy(); 1696 Type *SizeTTy = getSizeTTy(B, TLI); 1697 return emitLibCall(LibFunc_strlcpy, SizeTTy, 1698 {CharPtrTy, CharPtrTy, SizeTTy}, 1699 {Dest, Src, Size}, B, TLI); 1700 } 1701 1702 Value *llvm::emitStrLCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1703 const TargetLibraryInfo *TLI) { 1704 Type *CharPtrTy = B.getPtrTy(); 1705 Type *SizeTTy = getSizeTTy(B, TLI); 1706 return emitLibCall(LibFunc_strlcat, SizeTTy, 1707 {CharPtrTy, CharPtrTy, SizeTTy}, 1708 {Dest, Src, Size}, B, TLI); 1709 } 1710 1711 Value *llvm::emitStrNCat(Value *Dest, Value *Src, Value *Size, IRBuilderBase &B, 1712 const TargetLibraryInfo *TLI) { 1713 Type *CharPtrTy = B.getPtrTy(); 1714 Type *SizeTTy = getSizeTTy(B, TLI); 1715 return emitLibCall(LibFunc_strncat, CharPtrTy, 1716 {CharPtrTy, CharPtrTy, SizeTTy}, 1717 {Dest, Src, Size}, B, TLI); 1718 } 1719 1720 Value *llvm::emitVSNPrintf(Value *Dest, Value *Size, Value *Fmt, Value *VAList, 1721 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1722 Type *CharPtrTy = B.getPtrTy(); 1723 Type *IntTy = getIntTy(B, TLI); 1724 Type *SizeTTy = getSizeTTy(B, TLI); 1725 return emitLibCall( 1726 LibFunc_vsnprintf, IntTy, 1727 {CharPtrTy, SizeTTy, CharPtrTy, VAList->getType()}, 1728 {Dest, Size, Fmt, VAList}, B, TLI); 1729 } 1730 1731 Value *llvm::emitVSPrintf(Value *Dest, Value *Fmt, Value *VAList, 1732 IRBuilderBase &B, const TargetLibraryInfo *TLI) { 1733 Type *CharPtrTy = B.getPtrTy(); 1734 Type *IntTy = getIntTy(B, TLI); 1735 return emitLibCall(LibFunc_vsprintf, IntTy, 1736 {CharPtrTy, CharPtrTy, VAList->getType()}, 1737 {Dest, Fmt, VAList}, B, TLI); 1738 } 1739 1740 /// Append a suffix to the function name according to the type of 'Op'. 1741 static void appendTypeSuffix(Value *Op, StringRef &Name, 1742 SmallString<20> &NameBuffer) { 1743 if (!Op->getType()->isDoubleTy()) { 1744 NameBuffer += Name; 1745 1746 if (Op->getType()->isFloatTy()) 1747 NameBuffer += 'f'; 1748 else 1749 NameBuffer += 'l'; 1750 1751 Name = NameBuffer; 1752 } 1753 } 1754 1755 static Value *emitUnaryFloatFnCallHelper(Value *Op, LibFunc TheLibFunc, 1756 StringRef Name, IRBuilderBase &B, 1757 const AttributeList &Attrs, 1758 const TargetLibraryInfo *TLI) { 1759 assert((Name != "") && "Must specify Name to emitUnaryFloatFnCall"); 1760 1761 Module *M = B.GetInsertBlock()->getModule(); 1762 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, Op->getType(), 1763 Op->getType()); 1764 CallInst *CI = B.CreateCall(Callee, Op, Name); 1765 1766 // The incoming attribute set may have come from a speculatable intrinsic, but 1767 // is being replaced with a library call which is not allowed to be 1768 // speculatable. 1769 CI->setAttributes( 1770 Attrs.removeFnAttribute(B.getContext(), Attribute::Speculatable)); 1771 if (const Function *F = 1772 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1773 CI->setCallingConv(F->getCallingConv()); 1774 1775 return CI; 1776 } 1777 1778 Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI, 1779 StringRef Name, IRBuilderBase &B, 1780 const AttributeList &Attrs) { 1781 SmallString<20> NameBuffer; 1782 appendTypeSuffix(Op, Name, NameBuffer); 1783 1784 LibFunc TheLibFunc; 1785 TLI->getLibFunc(Name, TheLibFunc); 1786 1787 return emitUnaryFloatFnCallHelper(Op, TheLibFunc, Name, B, Attrs, TLI); 1788 } 1789 1790 Value *llvm::emitUnaryFloatFnCall(Value *Op, const TargetLibraryInfo *TLI, 1791 LibFunc DoubleFn, LibFunc FloatFn, 1792 LibFunc LongDoubleFn, IRBuilderBase &B, 1793 const AttributeList &Attrs) { 1794 // Get the name of the function according to TLI. 1795 Module *M = B.GetInsertBlock()->getModule(); 1796 LibFunc TheLibFunc; 1797 StringRef Name = getFloatFn(M, TLI, Op->getType(), DoubleFn, FloatFn, 1798 LongDoubleFn, TheLibFunc); 1799 1800 return emitUnaryFloatFnCallHelper(Op, TheLibFunc, Name, B, Attrs, TLI); 1801 } 1802 1803 static Value *emitBinaryFloatFnCallHelper(Value *Op1, Value *Op2, 1804 LibFunc TheLibFunc, 1805 StringRef Name, IRBuilderBase &B, 1806 const AttributeList &Attrs, 1807 const TargetLibraryInfo *TLI) { 1808 assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall"); 1809 1810 Module *M = B.GetInsertBlock()->getModule(); 1811 FunctionCallee Callee = getOrInsertLibFunc(M, *TLI, TheLibFunc, Op1->getType(), 1812 Op1->getType(), Op2->getType()); 1813 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 1814 CallInst *CI = B.CreateCall(Callee, { Op1, Op2 }, Name); 1815 1816 // The incoming attribute set may have come from a speculatable intrinsic, but 1817 // is being replaced with a library call which is not allowed to be 1818 // speculatable. 1819 CI->setAttributes( 1820 Attrs.removeFnAttribute(B.getContext(), Attribute::Speculatable)); 1821 if (const Function *F = 1822 dyn_cast<Function>(Callee.getCallee()->stripPointerCasts())) 1823 CI->setCallingConv(F->getCallingConv()); 1824 1825 return CI; 1826 } 1827 1828 Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, 1829 const TargetLibraryInfo *TLI, 1830 StringRef Name, IRBuilderBase &B, 1831 const AttributeList &Attrs) { 1832 assert((Name != "") && "Must specify Name to emitBinaryFloatFnCall"); 1833 1834 SmallString<20> NameBuffer; 1835 appendTypeSuffix(Op1, Name, NameBuffer); 1836 1837 LibFunc TheLibFunc; 1838 TLI->getLibFunc(Name, TheLibFunc); 1839 1840 return emitBinaryFloatFnCallHelper(Op1, Op2, TheLibFunc, Name, B, Attrs, TLI); 1841 } 1842 1843 Value *llvm::emitBinaryFloatFnCall(Value *Op1, Value *Op2, 1844 const TargetLibraryInfo *TLI, 1845 LibFunc DoubleFn, LibFunc FloatFn, 1846 LibFunc LongDoubleFn, IRBuilderBase &B, 1847 const AttributeList &Attrs) { 1848 // Get the name of the function according to TLI. 1849 Module *M = B.GetInsertBlock()->getModule(); 1850 LibFunc TheLibFunc; 1851 StringRef Name = getFloatFn(M, TLI, Op1->getType(), DoubleFn, FloatFn, 1852 LongDoubleFn, TheLibFunc); 1853 1854 return emitBinaryFloatFnCallHelper(Op1, Op2, TheLibFunc, Name, B, Attrs, TLI); 1855 } 1856 1857 // Emit a call to putchar(int) with Char as the argument. Char must have 1858 // the same precision as int, which need not be 32 bits. 1859 Value *llvm::emitPutChar(Value *Char, IRBuilderBase &B, 1860 const TargetLibraryInfo *TLI) { 1861 Module *M = B.GetInsertBlock()->getModule(); 1862 if (!isLibFuncEmittable(M, TLI, LibFunc_putchar)) 1863 return nullptr; 1864 1865 Type *IntTy = getIntTy(B, TLI); 1866 StringRef PutCharName = TLI->getName(LibFunc_putchar); 1867 FunctionCallee PutChar = getOrInsertLibFunc(M, *TLI, LibFunc_putchar, 1868 IntTy, IntTy); 1869 inferNonMandatoryLibFuncAttrs(M, PutCharName, *TLI); 1870 CallInst *CI = B.CreateCall(PutChar, Char, PutCharName); 1871 1872 if (const Function *F = 1873 dyn_cast<Function>(PutChar.getCallee()->stripPointerCasts())) 1874 CI->setCallingConv(F->getCallingConv()); 1875 return CI; 1876 } 1877 1878 Value *llvm::emitPutS(Value *Str, IRBuilderBase &B, 1879 const TargetLibraryInfo *TLI) { 1880 Module *M = B.GetInsertBlock()->getModule(); 1881 if (!isLibFuncEmittable(M, TLI, LibFunc_puts)) 1882 return nullptr; 1883 1884 Type *IntTy = getIntTy(B, TLI); 1885 StringRef PutsName = TLI->getName(LibFunc_puts); 1886 FunctionCallee PutS = getOrInsertLibFunc(M, *TLI, LibFunc_puts, IntTy, 1887 B.getPtrTy()); 1888 inferNonMandatoryLibFuncAttrs(M, PutsName, *TLI); 1889 CallInst *CI = B.CreateCall(PutS, Str, PutsName); 1890 if (const Function *F = 1891 dyn_cast<Function>(PutS.getCallee()->stripPointerCasts())) 1892 CI->setCallingConv(F->getCallingConv()); 1893 return CI; 1894 } 1895 1896 Value *llvm::emitFPutC(Value *Char, Value *File, IRBuilderBase &B, 1897 const TargetLibraryInfo *TLI) { 1898 Module *M = B.GetInsertBlock()->getModule(); 1899 if (!isLibFuncEmittable(M, TLI, LibFunc_fputc)) 1900 return nullptr; 1901 1902 Type *IntTy = getIntTy(B, TLI); 1903 StringRef FPutcName = TLI->getName(LibFunc_fputc); 1904 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fputc, IntTy, 1905 IntTy, File->getType()); 1906 if (File->getType()->isPointerTy()) 1907 inferNonMandatoryLibFuncAttrs(M, FPutcName, *TLI); 1908 CallInst *CI = B.CreateCall(F, {Char, File}, FPutcName); 1909 1910 if (const Function *Fn = 1911 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1912 CI->setCallingConv(Fn->getCallingConv()); 1913 return CI; 1914 } 1915 1916 Value *llvm::emitFPutS(Value *Str, Value *File, IRBuilderBase &B, 1917 const TargetLibraryInfo *TLI) { 1918 Module *M = B.GetInsertBlock()->getModule(); 1919 if (!isLibFuncEmittable(M, TLI, LibFunc_fputs)) 1920 return nullptr; 1921 1922 Type *IntTy = getIntTy(B, TLI); 1923 StringRef FPutsName = TLI->getName(LibFunc_fputs); 1924 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fputs, IntTy, 1925 B.getPtrTy(), File->getType()); 1926 if (File->getType()->isPointerTy()) 1927 inferNonMandatoryLibFuncAttrs(M, FPutsName, *TLI); 1928 CallInst *CI = B.CreateCall(F, {Str, File}, FPutsName); 1929 1930 if (const Function *Fn = 1931 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1932 CI->setCallingConv(Fn->getCallingConv()); 1933 return CI; 1934 } 1935 1936 Value *llvm::emitFWrite(Value *Ptr, Value *Size, Value *File, IRBuilderBase &B, 1937 const DataLayout &DL, const TargetLibraryInfo *TLI) { 1938 Module *M = B.GetInsertBlock()->getModule(); 1939 if (!isLibFuncEmittable(M, TLI, LibFunc_fwrite)) 1940 return nullptr; 1941 1942 Type *SizeTTy = getSizeTTy(B, TLI); 1943 StringRef FWriteName = TLI->getName(LibFunc_fwrite); 1944 FunctionCallee F = getOrInsertLibFunc(M, *TLI, LibFunc_fwrite, 1945 SizeTTy, B.getPtrTy(), SizeTTy, 1946 SizeTTy, File->getType()); 1947 1948 if (File->getType()->isPointerTy()) 1949 inferNonMandatoryLibFuncAttrs(M, FWriteName, *TLI); 1950 CallInst *CI = 1951 B.CreateCall(F, {Ptr, Size, 1952 ConstantInt::get(SizeTTy, 1), File}); 1953 1954 if (const Function *Fn = 1955 dyn_cast<Function>(F.getCallee()->stripPointerCasts())) 1956 CI->setCallingConv(Fn->getCallingConv()); 1957 return CI; 1958 } 1959 1960 Value *llvm::emitMalloc(Value *Num, IRBuilderBase &B, const DataLayout &DL, 1961 const TargetLibraryInfo *TLI) { 1962 Module *M = B.GetInsertBlock()->getModule(); 1963 if (!isLibFuncEmittable(M, TLI, LibFunc_malloc)) 1964 return nullptr; 1965 1966 StringRef MallocName = TLI->getName(LibFunc_malloc); 1967 Type *SizeTTy = getSizeTTy(B, TLI); 1968 FunctionCallee Malloc = getOrInsertLibFunc(M, *TLI, LibFunc_malloc, 1969 B.getPtrTy(), SizeTTy); 1970 inferNonMandatoryLibFuncAttrs(M, MallocName, *TLI); 1971 CallInst *CI = B.CreateCall(Malloc, Num, MallocName); 1972 1973 if (const Function *F = 1974 dyn_cast<Function>(Malloc.getCallee()->stripPointerCasts())) 1975 CI->setCallingConv(F->getCallingConv()); 1976 1977 return CI; 1978 } 1979 1980 Value *llvm::emitCalloc(Value *Num, Value *Size, IRBuilderBase &B, 1981 const TargetLibraryInfo &TLI) { 1982 Module *M = B.GetInsertBlock()->getModule(); 1983 if (!isLibFuncEmittable(M, &TLI, LibFunc_calloc)) 1984 return nullptr; 1985 1986 StringRef CallocName = TLI.getName(LibFunc_calloc); 1987 Type *SizeTTy = getSizeTTy(B, &TLI); 1988 FunctionCallee Calloc = getOrInsertLibFunc(M, TLI, LibFunc_calloc, 1989 B.getPtrTy(), SizeTTy, SizeTTy); 1990 inferNonMandatoryLibFuncAttrs(M, CallocName, TLI); 1991 CallInst *CI = B.CreateCall(Calloc, {Num, Size}, CallocName); 1992 1993 if (const auto *F = 1994 dyn_cast<Function>(Calloc.getCallee()->stripPointerCasts())) 1995 CI->setCallingConv(F->getCallingConv()); 1996 1997 return CI; 1998 } 1999 2000 Value *llvm::emitHotColdSizeReturningNew(Value *Num, IRBuilderBase &B, 2001 const TargetLibraryInfo *TLI, 2002 LibFunc SizeFeedbackNewFunc, 2003 uint8_t HotCold) { 2004 Module *M = B.GetInsertBlock()->getModule(); 2005 if (!isLibFuncEmittable(M, TLI, SizeFeedbackNewFunc)) 2006 return nullptr; 2007 2008 StringRef Name = TLI->getName(SizeFeedbackNewFunc); 2009 2010 // __sized_ptr_t struct return type { void*, size_t } 2011 StructType *SizedPtrT = 2012 StructType::get(M->getContext(), {B.getPtrTy(), Num->getType()}); 2013 FunctionCallee Func = 2014 M->getOrInsertFunction(Name, SizedPtrT, Num->getType(), B.getInt8Ty()); 2015 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2016 CallInst *CI = B.CreateCall(Func, {Num, B.getInt8(HotCold)}, "sized_ptr"); 2017 2018 if (const Function *F = dyn_cast<Function>(Func.getCallee())) 2019 CI->setCallingConv(F->getCallingConv()); 2020 2021 return CI; 2022 } 2023 2024 Value *llvm::emitHotColdSizeReturningNewAligned(Value *Num, Value *Align, 2025 IRBuilderBase &B, 2026 const TargetLibraryInfo *TLI, 2027 LibFunc SizeFeedbackNewFunc, 2028 uint8_t HotCold) { 2029 Module *M = B.GetInsertBlock()->getModule(); 2030 if (!isLibFuncEmittable(M, TLI, SizeFeedbackNewFunc)) 2031 return nullptr; 2032 2033 StringRef Name = TLI->getName(SizeFeedbackNewFunc); 2034 2035 // __sized_ptr_t struct return type { void*, size_t } 2036 StructType *SizedPtrT = 2037 StructType::get(M->getContext(), {B.getPtrTy(), Num->getType()}); 2038 FunctionCallee Func = M->getOrInsertFunction(Name, SizedPtrT, Num->getType(), 2039 Align->getType(), B.getInt8Ty()); 2040 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2041 CallInst *CI = 2042 B.CreateCall(Func, {Num, Align, B.getInt8(HotCold)}, "sized_ptr"); 2043 2044 if (const Function *F = dyn_cast<Function>(Func.getCallee())) 2045 CI->setCallingConv(F->getCallingConv()); 2046 2047 return CI; 2048 } 2049 2050 Value *llvm::emitHotColdNew(Value *Num, IRBuilderBase &B, 2051 const TargetLibraryInfo *TLI, LibFunc NewFunc, 2052 uint8_t HotCold) { 2053 Module *M = B.GetInsertBlock()->getModule(); 2054 if (!isLibFuncEmittable(M, TLI, NewFunc)) 2055 return nullptr; 2056 2057 StringRef Name = TLI->getName(NewFunc); 2058 FunctionCallee Func = M->getOrInsertFunction(Name, B.getPtrTy(), 2059 Num->getType(), B.getInt8Ty()); 2060 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2061 CallInst *CI = B.CreateCall(Func, {Num, B.getInt8(HotCold)}, Name); 2062 2063 if (const Function *F = 2064 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2065 CI->setCallingConv(F->getCallingConv()); 2066 2067 return CI; 2068 } 2069 2070 Value *llvm::emitHotColdNewNoThrow(Value *Num, Value *NoThrow, IRBuilderBase &B, 2071 const TargetLibraryInfo *TLI, 2072 LibFunc NewFunc, uint8_t HotCold) { 2073 Module *M = B.GetInsertBlock()->getModule(); 2074 if (!isLibFuncEmittable(M, TLI, NewFunc)) 2075 return nullptr; 2076 2077 StringRef Name = TLI->getName(NewFunc); 2078 FunctionCallee Func = 2079 M->getOrInsertFunction(Name, B.getPtrTy(), Num->getType(), 2080 NoThrow->getType(), B.getInt8Ty()); 2081 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2082 CallInst *CI = B.CreateCall(Func, {Num, NoThrow, B.getInt8(HotCold)}, Name); 2083 2084 if (const Function *F = 2085 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2086 CI->setCallingConv(F->getCallingConv()); 2087 2088 return CI; 2089 } 2090 2091 Value *llvm::emitHotColdNewAligned(Value *Num, Value *Align, IRBuilderBase &B, 2092 const TargetLibraryInfo *TLI, 2093 LibFunc NewFunc, uint8_t HotCold) { 2094 Module *M = B.GetInsertBlock()->getModule(); 2095 if (!isLibFuncEmittable(M, TLI, NewFunc)) 2096 return nullptr; 2097 2098 StringRef Name = TLI->getName(NewFunc); 2099 FunctionCallee Func = M->getOrInsertFunction( 2100 Name, B.getPtrTy(), Num->getType(), Align->getType(), B.getInt8Ty()); 2101 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2102 CallInst *CI = B.CreateCall(Func, {Num, Align, B.getInt8(HotCold)}, Name); 2103 2104 if (const Function *F = 2105 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2106 CI->setCallingConv(F->getCallingConv()); 2107 2108 return CI; 2109 } 2110 2111 Value *llvm::emitHotColdNewAlignedNoThrow(Value *Num, Value *Align, 2112 Value *NoThrow, IRBuilderBase &B, 2113 const TargetLibraryInfo *TLI, 2114 LibFunc NewFunc, uint8_t HotCold) { 2115 Module *M = B.GetInsertBlock()->getModule(); 2116 if (!isLibFuncEmittable(M, TLI, NewFunc)) 2117 return nullptr; 2118 2119 StringRef Name = TLI->getName(NewFunc); 2120 FunctionCallee Func = M->getOrInsertFunction( 2121 Name, B.getPtrTy(), Num->getType(), Align->getType(), 2122 NoThrow->getType(), B.getInt8Ty()); 2123 inferNonMandatoryLibFuncAttrs(M, Name, *TLI); 2124 CallInst *CI = 2125 B.CreateCall(Func, {Num, Align, NoThrow, B.getInt8(HotCold)}, Name); 2126 2127 if (const Function *F = 2128 dyn_cast<Function>(Func.getCallee()->stripPointerCasts())) 2129 CI->setCallingConv(F->getCallingConv()); 2130 2131 return CI; 2132 } 2133