1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==// 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 the TargetLibraryInfo class. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Analysis/TargetLibraryInfo.h" 14 #include "llvm/ADT/DenseMap.h" 15 #include "llvm/ADT/SmallString.h" 16 #include "llvm/IR/Constants.h" 17 #include "llvm/InitializePasses.h" 18 #include "llvm/Support/CommandLine.h" 19 #include "llvm/TargetParser/Triple.h" 20 using namespace llvm; 21 22 static cl::opt<TargetLibraryInfoImpl::VectorLibrary> ClVectorLibrary( 23 "vector-library", cl::Hidden, cl::desc("Vector functions library"), 24 cl::init(TargetLibraryInfoImpl::NoLibrary), 25 cl::values(clEnumValN(TargetLibraryInfoImpl::NoLibrary, "none", 26 "No vector functions library"), 27 clEnumValN(TargetLibraryInfoImpl::Accelerate, "Accelerate", 28 "Accelerate framework"), 29 clEnumValN(TargetLibraryInfoImpl::DarwinLibSystemM, 30 "Darwin_libsystem_m", "Darwin libsystem_m"), 31 clEnumValN(TargetLibraryInfoImpl::LIBMVEC_X86, "LIBMVEC-X86", 32 "GLIBC Vector Math library"), 33 clEnumValN(TargetLibraryInfoImpl::MASSV, "MASSV", 34 "IBM MASS vector library"), 35 clEnumValN(TargetLibraryInfoImpl::SVML, "SVML", 36 "Intel SVML library"), 37 clEnumValN(TargetLibraryInfoImpl::SLEEFGNUABI, "sleefgnuabi", 38 "SIMD Library for Evaluating Elementary Functions"), 39 clEnumValN(TargetLibraryInfoImpl::ArmPL, "ArmPL", 40 "Arm Performance Libraries"), 41 clEnumValN(TargetLibraryInfoImpl::AMDLIBM, "AMDLIBM", 42 "AMD vector math library"))); 43 44 StringLiteral const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] = 45 { 46 #define TLI_DEFINE_STRING 47 #include "llvm/Analysis/TargetLibraryInfo.def" 48 }; 49 50 std::string VecDesc::getVectorFunctionABIVariantString() const { 51 assert(!VectorFnName.empty() && "Vector function name must not be empty."); 52 SmallString<256> Buffer; 53 llvm::raw_svector_ostream Out(Buffer); 54 Out << VABIPrefix << "_" << ScalarFnName << "(" << VectorFnName << ")"; 55 return std::string(Out.str()); 56 } 57 58 // Recognized types of library function arguments and return types. 59 enum FuncArgTypeID : char { 60 Void = 0, // Must be zero. 61 Bool, // 8 bits on all targets 62 Int16, 63 Int32, 64 Int, 65 IntPlus, // Int or bigger. 66 Long, // Either 32 or 64 bits. 67 IntX, // Any integer type. 68 Int64, 69 LLong, // 64 bits on all targets. 70 SizeT, // size_t. 71 SSizeT, // POSIX ssize_t. 72 Flt, // IEEE float. 73 Dbl, // IEEE double. 74 LDbl, // Any floating type (TODO: tighten this up). 75 Floating, // Any floating type. 76 Ptr, // Any pointer type. 77 Struct, // Any struct type. 78 Ellip, // The ellipsis (...). 79 Same, // Same argument type as the previous one. 80 }; 81 82 typedef std::array<FuncArgTypeID, 8> FuncProtoTy; 83 84 static const FuncProtoTy Signatures[] = { 85 #define TLI_DEFINE_SIG 86 #include "llvm/Analysis/TargetLibraryInfo.def" 87 }; 88 89 static_assert(sizeof Signatures / sizeof *Signatures == LibFunc::NumLibFuncs, 90 "Missing library function signatures"); 91 92 static bool hasSinCosPiStret(const Triple &T) { 93 // Only Darwin variants have _stret versions of combined trig functions. 94 if (!T.isOSDarwin()) 95 return false; 96 97 // The ABI is rather complicated on x86, so don't do anything special there. 98 if (T.getArch() == Triple::x86) 99 return false; 100 101 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9)) 102 return false; 103 104 if (T.isiOS() && T.isOSVersionLT(7, 0)) 105 return false; 106 107 return true; 108 } 109 110 static bool hasBcmp(const Triple &TT) { 111 // Posix removed support from bcmp() in 2001, but the glibc and several 112 // implementations of the libc still have it. 113 if (TT.isOSLinux()) 114 return TT.isGNUEnvironment() || TT.isMusl(); 115 // Both NetBSD and OpenBSD are planning to remove the function. Windows does 116 // not have it. 117 return TT.isOSFreeBSD() || TT.isOSSolaris(); 118 } 119 120 static bool isCallingConvCCompatible(CallingConv::ID CC, StringRef TT, 121 FunctionType *FuncTy) { 122 switch (CC) { 123 default: 124 return false; 125 case llvm::CallingConv::C: 126 return true; 127 case llvm::CallingConv::ARM_APCS: 128 case llvm::CallingConv::ARM_AAPCS: 129 case llvm::CallingConv::ARM_AAPCS_VFP: { 130 131 // The iOS ABI diverges from the standard in some cases, so for now don't 132 // try to simplify those calls. 133 if (Triple(TT).isiOS()) 134 return false; 135 136 if (!FuncTy->getReturnType()->isPointerTy() && 137 !FuncTy->getReturnType()->isIntegerTy() && 138 !FuncTy->getReturnType()->isVoidTy()) 139 return false; 140 141 for (auto *Param : FuncTy->params()) { 142 if (!Param->isPointerTy() && !Param->isIntegerTy()) 143 return false; 144 } 145 return true; 146 } 147 } 148 return false; 149 } 150 151 bool TargetLibraryInfoImpl::isCallingConvCCompatible(CallBase *CI) { 152 return ::isCallingConvCCompatible(CI->getCallingConv(), 153 CI->getModule()->getTargetTriple(), 154 CI->getFunctionType()); 155 } 156 157 bool TargetLibraryInfoImpl::isCallingConvCCompatible(Function *F) { 158 return ::isCallingConvCCompatible(F->getCallingConv(), 159 F->getParent()->getTargetTriple(), 160 F->getFunctionType()); 161 } 162 163 /// Initialize the set of available library functions based on the specified 164 /// target triple. This should be carefully written so that a missing target 165 /// triple gets a sane set of defaults. 166 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T, 167 ArrayRef<StringLiteral> StandardNames) { 168 // Set IO unlocked variants as unavailable 169 // Set them as available per system below 170 TLI.setUnavailable(LibFunc_getc_unlocked); 171 TLI.setUnavailable(LibFunc_getchar_unlocked); 172 TLI.setUnavailable(LibFunc_putc_unlocked); 173 TLI.setUnavailable(LibFunc_putchar_unlocked); 174 TLI.setUnavailable(LibFunc_fputc_unlocked); 175 TLI.setUnavailable(LibFunc_fgetc_unlocked); 176 TLI.setUnavailable(LibFunc_fread_unlocked); 177 TLI.setUnavailable(LibFunc_fwrite_unlocked); 178 TLI.setUnavailable(LibFunc_fputs_unlocked); 179 TLI.setUnavailable(LibFunc_fgets_unlocked); 180 181 bool ShouldExtI32Param, ShouldExtI32Return; 182 bool ShouldSignExtI32Param, ShouldSignExtI32Return; 183 TargetLibraryInfo::initExtensionsForTriple(ShouldExtI32Param, 184 ShouldExtI32Return, ShouldSignExtI32Param, ShouldSignExtI32Return, T); 185 TLI.setShouldExtI32Param(ShouldExtI32Param); 186 TLI.setShouldExtI32Return(ShouldExtI32Return); 187 TLI.setShouldSignExtI32Param(ShouldSignExtI32Param); 188 TLI.setShouldSignExtI32Return(ShouldSignExtI32Return); 189 190 // Let's assume by default that the size of int is 32 bits, unless the target 191 // is a 16-bit architecture because then it most likely is 16 bits. If that 192 // isn't true for a target those defaults should be overridden below. 193 TLI.setIntSize(T.isArch16Bit() ? 16 : 32); 194 195 // There is really no runtime library on AMDGPU, apart from 196 // __kmpc_alloc/free_shared. 197 if (T.isAMDGPU()) { 198 TLI.disableAllFunctions(); 199 TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared); 200 TLI.setAvailable(llvm::LibFunc___kmpc_free_shared); 201 return; 202 } 203 204 // memset_pattern{4,8,16} is only available on iOS 3.0 and Mac OS X 10.5 and 205 // later. All versions of watchOS support it. 206 if (T.isMacOSX()) { 207 // available IO unlocked variants on Mac OS X 208 TLI.setAvailable(LibFunc_getc_unlocked); 209 TLI.setAvailable(LibFunc_getchar_unlocked); 210 TLI.setAvailable(LibFunc_putc_unlocked); 211 TLI.setAvailable(LibFunc_putchar_unlocked); 212 TLI.setUnavailable(LibFunc_memrchr); 213 214 if (T.isMacOSXVersionLT(10, 5)) { 215 TLI.setUnavailable(LibFunc_memset_pattern4); 216 TLI.setUnavailable(LibFunc_memset_pattern8); 217 TLI.setUnavailable(LibFunc_memset_pattern16); 218 } 219 } else if (T.isiOS()) { 220 if (T.isOSVersionLT(3, 0)) { 221 TLI.setUnavailable(LibFunc_memset_pattern4); 222 TLI.setUnavailable(LibFunc_memset_pattern8); 223 TLI.setUnavailable(LibFunc_memset_pattern16); 224 } 225 } else if (!T.isWatchOS()) { 226 TLI.setUnavailable(LibFunc_memset_pattern4); 227 TLI.setUnavailable(LibFunc_memset_pattern8); 228 TLI.setUnavailable(LibFunc_memset_pattern16); 229 } 230 231 if (!hasSinCosPiStret(T)) { 232 TLI.setUnavailable(LibFunc_sinpi); 233 TLI.setUnavailable(LibFunc_sinpif); 234 TLI.setUnavailable(LibFunc_cospi); 235 TLI.setUnavailable(LibFunc_cospif); 236 TLI.setUnavailable(LibFunc_sincospi_stret); 237 TLI.setUnavailable(LibFunc_sincospif_stret); 238 } 239 240 if (!hasBcmp(T)) 241 TLI.setUnavailable(LibFunc_bcmp); 242 243 if (T.isMacOSX() && T.getArch() == Triple::x86 && 244 !T.isMacOSXVersionLT(10, 7)) { 245 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions 246 // we don't care about) have two versions; on recent OSX, the one we want 247 // has a $UNIX2003 suffix. The two implementations are identical except 248 // for the return value in some edge cases. However, we don't want to 249 // generate code that depends on the old symbols. 250 TLI.setAvailableWithName(LibFunc_fwrite, "fwrite$UNIX2003"); 251 TLI.setAvailableWithName(LibFunc_fputs, "fputs$UNIX2003"); 252 } 253 254 // iprintf and friends are only available on XCore, TCE, and Emscripten. 255 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce && 256 T.getOS() != Triple::Emscripten) { 257 TLI.setUnavailable(LibFunc_iprintf); 258 TLI.setUnavailable(LibFunc_siprintf); 259 TLI.setUnavailable(LibFunc_fiprintf); 260 } 261 262 // __small_printf and friends are only available on Emscripten. 263 if (T.getOS() != Triple::Emscripten) { 264 TLI.setUnavailable(LibFunc_small_printf); 265 TLI.setUnavailable(LibFunc_small_sprintf); 266 TLI.setUnavailable(LibFunc_small_fprintf); 267 } 268 269 if (T.isOSWindows() && !T.isOSCygMing()) { 270 // XXX: The earliest documentation available at the moment is for VS2015/VC19: 271 // https://docs.microsoft.com/en-us/cpp/c-runtime-library/floating-point-support?view=vs-2015 272 // XXX: In order to use an MSVCRT older than VC19, 273 // the specific library version must be explicit in the target triple, 274 // e.g., x86_64-pc-windows-msvc18. 275 bool hasPartialC99 = true; 276 if (T.isKnownWindowsMSVCEnvironment()) { 277 VersionTuple Version = T.getEnvironmentVersion(); 278 hasPartialC99 = (Version.getMajor() == 0 || Version.getMajor() >= 19); 279 } 280 281 // Latest targets support C89 math functions, in part. 282 bool isARM = (T.getArch() == Triple::aarch64 || 283 T.getArch() == Triple::arm); 284 bool hasPartialFloat = (isARM || 285 T.getArch() == Triple::x86_64); 286 287 // Win32 does not support float C89 math functions, in general. 288 if (!hasPartialFloat) { 289 TLI.setUnavailable(LibFunc_acosf); 290 TLI.setUnavailable(LibFunc_asinf); 291 TLI.setUnavailable(LibFunc_atan2f); 292 TLI.setUnavailable(LibFunc_atanf); 293 TLI.setUnavailable(LibFunc_ceilf); 294 TLI.setUnavailable(LibFunc_cosf); 295 TLI.setUnavailable(LibFunc_coshf); 296 TLI.setUnavailable(LibFunc_expf); 297 TLI.setUnavailable(LibFunc_floorf); 298 TLI.setUnavailable(LibFunc_fmodf); 299 TLI.setUnavailable(LibFunc_log10f); 300 TLI.setUnavailable(LibFunc_logf); 301 TLI.setUnavailable(LibFunc_modff); 302 TLI.setUnavailable(LibFunc_powf); 303 TLI.setUnavailable(LibFunc_remainderf); 304 TLI.setUnavailable(LibFunc_sinf); 305 TLI.setUnavailable(LibFunc_sinhf); 306 TLI.setUnavailable(LibFunc_sqrtf); 307 TLI.setUnavailable(LibFunc_tanf); 308 TLI.setUnavailable(LibFunc_tanhf); 309 } 310 if (!isARM) 311 TLI.setUnavailable(LibFunc_fabsf); 312 TLI.setUnavailable(LibFunc_frexpf); 313 TLI.setUnavailable(LibFunc_ldexpf); 314 315 // Win32 does not support long double C89 math functions. 316 TLI.setUnavailable(LibFunc_acosl); 317 TLI.setUnavailable(LibFunc_asinl); 318 TLI.setUnavailable(LibFunc_atan2l); 319 TLI.setUnavailable(LibFunc_atanl); 320 TLI.setUnavailable(LibFunc_ceill); 321 TLI.setUnavailable(LibFunc_cosl); 322 TLI.setUnavailable(LibFunc_coshl); 323 TLI.setUnavailable(LibFunc_expl); 324 TLI.setUnavailable(LibFunc_fabsl); 325 TLI.setUnavailable(LibFunc_floorl); 326 TLI.setUnavailable(LibFunc_fmodl); 327 TLI.setUnavailable(LibFunc_frexpl); 328 TLI.setUnavailable(LibFunc_ldexpl); 329 TLI.setUnavailable(LibFunc_log10l); 330 TLI.setUnavailable(LibFunc_logl); 331 TLI.setUnavailable(LibFunc_modfl); 332 TLI.setUnavailable(LibFunc_powl); 333 TLI.setUnavailable(LibFunc_remainderl); 334 TLI.setUnavailable(LibFunc_sinl); 335 TLI.setUnavailable(LibFunc_sinhl); 336 TLI.setUnavailable(LibFunc_sqrtl); 337 TLI.setUnavailable(LibFunc_tanl); 338 TLI.setUnavailable(LibFunc_tanhl); 339 340 // Win32 does not fully support C99 math functions. 341 if (!hasPartialC99) { 342 TLI.setUnavailable(LibFunc_acosh); 343 TLI.setUnavailable(LibFunc_acoshf); 344 TLI.setUnavailable(LibFunc_asinh); 345 TLI.setUnavailable(LibFunc_asinhf); 346 TLI.setUnavailable(LibFunc_atanh); 347 TLI.setUnavailable(LibFunc_atanhf); 348 TLI.setAvailableWithName(LibFunc_cabs, "_cabs"); 349 TLI.setUnavailable(LibFunc_cabsf); 350 TLI.setUnavailable(LibFunc_cbrt); 351 TLI.setUnavailable(LibFunc_cbrtf); 352 TLI.setAvailableWithName(LibFunc_copysign, "_copysign"); 353 TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf"); 354 TLI.setUnavailable(LibFunc_exp2); 355 TLI.setUnavailable(LibFunc_exp2f); 356 TLI.setUnavailable(LibFunc_expm1); 357 TLI.setUnavailable(LibFunc_expm1f); 358 TLI.setUnavailable(LibFunc_fmax); 359 TLI.setUnavailable(LibFunc_fmaxf); 360 TLI.setUnavailable(LibFunc_fmin); 361 TLI.setUnavailable(LibFunc_fminf); 362 TLI.setUnavailable(LibFunc_log1p); 363 TLI.setUnavailable(LibFunc_log1pf); 364 TLI.setUnavailable(LibFunc_log2); 365 TLI.setUnavailable(LibFunc_log2f); 366 TLI.setAvailableWithName(LibFunc_logb, "_logb"); 367 if (hasPartialFloat) 368 TLI.setAvailableWithName(LibFunc_logbf, "_logbf"); 369 else 370 TLI.setUnavailable(LibFunc_logbf); 371 TLI.setUnavailable(LibFunc_rint); 372 TLI.setUnavailable(LibFunc_rintf); 373 TLI.setUnavailable(LibFunc_round); 374 TLI.setUnavailable(LibFunc_roundf); 375 TLI.setUnavailable(LibFunc_trunc); 376 TLI.setUnavailable(LibFunc_truncf); 377 } 378 379 // Win32 does not support long double C99 math functions. 380 TLI.setUnavailable(LibFunc_acoshl); 381 TLI.setUnavailable(LibFunc_asinhl); 382 TLI.setUnavailable(LibFunc_atanhl); 383 TLI.setUnavailable(LibFunc_cabsl); 384 TLI.setUnavailable(LibFunc_cbrtl); 385 TLI.setUnavailable(LibFunc_copysignl); 386 TLI.setUnavailable(LibFunc_exp2l); 387 TLI.setUnavailable(LibFunc_expm1l); 388 TLI.setUnavailable(LibFunc_fmaxl); 389 TLI.setUnavailable(LibFunc_fminl); 390 TLI.setUnavailable(LibFunc_log1pl); 391 TLI.setUnavailable(LibFunc_log2l); 392 TLI.setUnavailable(LibFunc_logbl); 393 TLI.setUnavailable(LibFunc_nearbyintl); 394 TLI.setUnavailable(LibFunc_rintl); 395 TLI.setUnavailable(LibFunc_roundl); 396 TLI.setUnavailable(LibFunc_truncl); 397 398 // Win32 does not support these functions, but 399 // they are generally available on POSIX-compliant systems. 400 TLI.setUnavailable(LibFunc_access); 401 TLI.setUnavailable(LibFunc_chmod); 402 TLI.setUnavailable(LibFunc_closedir); 403 TLI.setUnavailable(LibFunc_fdopen); 404 TLI.setUnavailable(LibFunc_fileno); 405 TLI.setUnavailable(LibFunc_fseeko); 406 TLI.setUnavailable(LibFunc_fstat); 407 TLI.setUnavailable(LibFunc_ftello); 408 TLI.setUnavailable(LibFunc_gettimeofday); 409 TLI.setUnavailable(LibFunc_memccpy); 410 TLI.setUnavailable(LibFunc_mkdir); 411 TLI.setUnavailable(LibFunc_open); 412 TLI.setUnavailable(LibFunc_opendir); 413 TLI.setUnavailable(LibFunc_pclose); 414 TLI.setUnavailable(LibFunc_popen); 415 TLI.setUnavailable(LibFunc_read); 416 TLI.setUnavailable(LibFunc_rmdir); 417 TLI.setUnavailable(LibFunc_stat); 418 TLI.setUnavailable(LibFunc_strcasecmp); 419 TLI.setUnavailable(LibFunc_strncasecmp); 420 TLI.setUnavailable(LibFunc_unlink); 421 TLI.setUnavailable(LibFunc_utime); 422 TLI.setUnavailable(LibFunc_write); 423 } 424 425 if (T.isOSWindows() && !T.isWindowsCygwinEnvironment()) { 426 // These functions aren't available in either MSVC or MinGW environments. 427 TLI.setUnavailable(LibFunc_bcmp); 428 TLI.setUnavailable(LibFunc_bcopy); 429 TLI.setUnavailable(LibFunc_bzero); 430 TLI.setUnavailable(LibFunc_chown); 431 TLI.setUnavailable(LibFunc_ctermid); 432 TLI.setUnavailable(LibFunc_ffs); 433 TLI.setUnavailable(LibFunc_flockfile); 434 TLI.setUnavailable(LibFunc_fstatvfs); 435 TLI.setUnavailable(LibFunc_ftrylockfile); 436 TLI.setUnavailable(LibFunc_funlockfile); 437 TLI.setUnavailable(LibFunc_getitimer); 438 TLI.setUnavailable(LibFunc_getlogin_r); 439 TLI.setUnavailable(LibFunc_getpwnam); 440 TLI.setUnavailable(LibFunc_htonl); 441 TLI.setUnavailable(LibFunc_htons); 442 TLI.setUnavailable(LibFunc_lchown); 443 TLI.setUnavailable(LibFunc_lstat); 444 TLI.setUnavailable(LibFunc_memrchr); 445 TLI.setUnavailable(LibFunc_ntohl); 446 TLI.setUnavailable(LibFunc_ntohs); 447 TLI.setUnavailable(LibFunc_pread); 448 TLI.setUnavailable(LibFunc_pwrite); 449 TLI.setUnavailable(LibFunc_readlink); 450 TLI.setUnavailable(LibFunc_realpath); 451 TLI.setUnavailable(LibFunc_setitimer); 452 TLI.setUnavailable(LibFunc_statvfs); 453 TLI.setUnavailable(LibFunc_stpcpy); 454 TLI.setUnavailable(LibFunc_stpncpy); 455 TLI.setUnavailable(LibFunc_times); 456 TLI.setUnavailable(LibFunc_uname); 457 TLI.setUnavailable(LibFunc_unsetenv); 458 TLI.setUnavailable(LibFunc_utimes); 459 } 460 461 // Pick just one set of new/delete variants. 462 if (T.isOSMSVCRT()) { 463 // MSVC, doesn't have the Itanium new/delete. 464 TLI.setUnavailable(LibFunc_ZdaPv); 465 TLI.setUnavailable(LibFunc_ZdaPvRKSt9nothrow_t); 466 TLI.setUnavailable(LibFunc_ZdaPvSt11align_val_t); 467 TLI.setUnavailable(LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t); 468 TLI.setUnavailable(LibFunc_ZdaPvj); 469 TLI.setUnavailable(LibFunc_ZdaPvjSt11align_val_t); 470 TLI.setUnavailable(LibFunc_ZdaPvm); 471 TLI.setUnavailable(LibFunc_ZdaPvmSt11align_val_t); 472 TLI.setUnavailable(LibFunc_ZdlPv); 473 TLI.setUnavailable(LibFunc_ZdlPvRKSt9nothrow_t); 474 TLI.setUnavailable(LibFunc_ZdlPvSt11align_val_t); 475 TLI.setUnavailable(LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t); 476 TLI.setUnavailable(LibFunc_ZdlPvj); 477 TLI.setUnavailable(LibFunc_ZdlPvjSt11align_val_t); 478 TLI.setUnavailable(LibFunc_ZdlPvm); 479 TLI.setUnavailable(LibFunc_ZdlPvmSt11align_val_t); 480 TLI.setUnavailable(LibFunc_Znaj); 481 TLI.setUnavailable(LibFunc_ZnajRKSt9nothrow_t); 482 TLI.setUnavailable(LibFunc_ZnajSt11align_val_t); 483 TLI.setUnavailable(LibFunc_ZnajSt11align_val_tRKSt9nothrow_t); 484 TLI.setUnavailable(LibFunc_Znam); 485 TLI.setUnavailable(LibFunc_ZnamRKSt9nothrow_t); 486 TLI.setUnavailable(LibFunc_ZnamRKSt9nothrow_t12__hot_cold_t); 487 TLI.setUnavailable(LibFunc_ZnamSt11align_val_t); 488 TLI.setUnavailable(LibFunc_ZnamSt11align_val_tRKSt9nothrow_t); 489 TLI.setUnavailable(LibFunc_Znwj); 490 TLI.setUnavailable(LibFunc_ZnwjRKSt9nothrow_t); 491 TLI.setUnavailable(LibFunc_ZnwjSt11align_val_t); 492 TLI.setUnavailable(LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t); 493 TLI.setUnavailable(LibFunc_Znwm); 494 TLI.setUnavailable(LibFunc_ZnwmRKSt9nothrow_t); 495 TLI.setUnavailable(LibFunc_ZnwmRKSt9nothrow_t12__hot_cold_t); 496 TLI.setUnavailable(LibFunc_ZnwmSt11align_val_t); 497 TLI.setUnavailable(LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t); 498 TLI.setUnavailable(LibFunc_Znwm12__hot_cold_t); 499 TLI.setUnavailable(LibFunc_ZnwmSt11align_val_t12__hot_cold_t); 500 TLI.setUnavailable(LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t12__hot_cold_t); 501 TLI.setUnavailable(LibFunc_Znam12__hot_cold_t); 502 TLI.setUnavailable(LibFunc_ZnamSt11align_val_t12__hot_cold_t); 503 TLI.setUnavailable(LibFunc_ZnamSt11align_val_tRKSt9nothrow_t12__hot_cold_t); 504 } else { 505 // Not MSVC, assume it's Itanium. 506 TLI.setUnavailable(LibFunc_msvc_new_int); 507 TLI.setUnavailable(LibFunc_msvc_new_int_nothrow); 508 TLI.setUnavailable(LibFunc_msvc_new_longlong); 509 TLI.setUnavailable(LibFunc_msvc_new_longlong_nothrow); 510 TLI.setUnavailable(LibFunc_msvc_delete_ptr32); 511 TLI.setUnavailable(LibFunc_msvc_delete_ptr32_nothrow); 512 TLI.setUnavailable(LibFunc_msvc_delete_ptr32_int); 513 TLI.setUnavailable(LibFunc_msvc_delete_ptr64); 514 TLI.setUnavailable(LibFunc_msvc_delete_ptr64_nothrow); 515 TLI.setUnavailable(LibFunc_msvc_delete_ptr64_longlong); 516 TLI.setUnavailable(LibFunc_msvc_new_array_int); 517 TLI.setUnavailable(LibFunc_msvc_new_array_int_nothrow); 518 TLI.setUnavailable(LibFunc_msvc_new_array_longlong); 519 TLI.setUnavailable(LibFunc_msvc_new_array_longlong_nothrow); 520 TLI.setUnavailable(LibFunc_msvc_delete_array_ptr32); 521 TLI.setUnavailable(LibFunc_msvc_delete_array_ptr32_nothrow); 522 TLI.setUnavailable(LibFunc_msvc_delete_array_ptr32_int); 523 TLI.setUnavailable(LibFunc_msvc_delete_array_ptr64); 524 TLI.setUnavailable(LibFunc_msvc_delete_array_ptr64_nothrow); 525 TLI.setUnavailable(LibFunc_msvc_delete_array_ptr64_longlong); 526 } 527 528 switch (T.getOS()) { 529 case Triple::MacOSX: 530 // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0 531 // and their names are __exp10 and __exp10f. exp10l is not available on 532 // OS X or iOS. 533 TLI.setUnavailable(LibFunc_exp10l); 534 if (T.isMacOSXVersionLT(10, 9)) { 535 TLI.setUnavailable(LibFunc_exp10); 536 TLI.setUnavailable(LibFunc_exp10f); 537 } else { 538 TLI.setAvailableWithName(LibFunc_exp10, "__exp10"); 539 TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f"); 540 } 541 break; 542 case Triple::IOS: 543 case Triple::TvOS: 544 case Triple::WatchOS: 545 case Triple::XROS: 546 TLI.setUnavailable(LibFunc_exp10l); 547 if (!T.isWatchOS() && 548 (T.isOSVersionLT(7, 0) || (T.isOSVersionLT(9, 0) && T.isX86()))) { 549 TLI.setUnavailable(LibFunc_exp10); 550 TLI.setUnavailable(LibFunc_exp10f); 551 } else { 552 TLI.setAvailableWithName(LibFunc_exp10, "__exp10"); 553 TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f"); 554 } 555 break; 556 case Triple::Linux: 557 // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely 558 // buggy prior to glibc version 2.18. Until this version is widely deployed 559 // or we have a reasonable detection strategy, we cannot use exp10 reliably 560 // on Linux. 561 // 562 // Fall through to disable all of them. 563 [[fallthrough]]; 564 default: 565 TLI.setUnavailable(LibFunc_exp10); 566 TLI.setUnavailable(LibFunc_exp10f); 567 TLI.setUnavailable(LibFunc_exp10l); 568 } 569 570 // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and 571 // Linux (GLIBC): 572 // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html 573 // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c 574 // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html 575 switch (T.getOS()) { 576 case Triple::Darwin: 577 case Triple::MacOSX: 578 case Triple::IOS: 579 case Triple::TvOS: 580 case Triple::WatchOS: 581 case Triple::XROS: 582 case Triple::FreeBSD: 583 case Triple::Linux: 584 break; 585 default: 586 TLI.setUnavailable(LibFunc_ffsl); 587 } 588 589 // ffsll is available on at least FreeBSD and Linux (GLIBC): 590 // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c 591 // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html 592 switch (T.getOS()) { 593 case Triple::Darwin: 594 case Triple::MacOSX: 595 case Triple::IOS: 596 case Triple::TvOS: 597 case Triple::WatchOS: 598 case Triple::XROS: 599 case Triple::FreeBSD: 600 case Triple::Linux: 601 break; 602 default: 603 TLI.setUnavailable(LibFunc_ffsll); 604 } 605 606 // The following functions are available on at least FreeBSD: 607 // http://svn.freebsd.org/base/head/lib/libc/string/fls.c 608 // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c 609 // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c 610 if (!T.isOSFreeBSD()) { 611 TLI.setUnavailable(LibFunc_fls); 612 TLI.setUnavailable(LibFunc_flsl); 613 TLI.setUnavailable(LibFunc_flsll); 614 } 615 616 // The following functions are only available on GNU/Linux (using glibc). 617 // Linux variants without glibc (eg: bionic, musl) may have some subset. 618 if (!T.isOSLinux() || !T.isGNUEnvironment()) { 619 TLI.setUnavailable(LibFunc_dunder_strdup); 620 TLI.setUnavailable(LibFunc_dunder_strtok_r); 621 TLI.setUnavailable(LibFunc_dunder_isoc99_scanf); 622 TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf); 623 TLI.setUnavailable(LibFunc_under_IO_getc); 624 TLI.setUnavailable(LibFunc_under_IO_putc); 625 // But, Android and musl have memalign. 626 if (!T.isAndroid() && !T.isMusl()) 627 TLI.setUnavailable(LibFunc_memalign); 628 TLI.setUnavailable(LibFunc_fopen64); 629 TLI.setUnavailable(LibFunc_fseeko64); 630 TLI.setUnavailable(LibFunc_fstat64); 631 TLI.setUnavailable(LibFunc_fstatvfs64); 632 TLI.setUnavailable(LibFunc_ftello64); 633 TLI.setUnavailable(LibFunc_lstat64); 634 TLI.setUnavailable(LibFunc_open64); 635 TLI.setUnavailable(LibFunc_stat64); 636 TLI.setUnavailable(LibFunc_statvfs64); 637 TLI.setUnavailable(LibFunc_tmpfile64); 638 639 // Relaxed math functions are included in math-finite.h on Linux (GLIBC). 640 // Note that math-finite.h is no longer supported by top-of-tree GLIBC, 641 // so we keep these functions around just so that they're recognized by 642 // the ConstantFolder. 643 TLI.setUnavailable(LibFunc_acos_finite); 644 TLI.setUnavailable(LibFunc_acosf_finite); 645 TLI.setUnavailable(LibFunc_acosl_finite); 646 TLI.setUnavailable(LibFunc_acosh_finite); 647 TLI.setUnavailable(LibFunc_acoshf_finite); 648 TLI.setUnavailable(LibFunc_acoshl_finite); 649 TLI.setUnavailable(LibFunc_asin_finite); 650 TLI.setUnavailable(LibFunc_asinf_finite); 651 TLI.setUnavailable(LibFunc_asinl_finite); 652 TLI.setUnavailable(LibFunc_atan2_finite); 653 TLI.setUnavailable(LibFunc_atan2f_finite); 654 TLI.setUnavailable(LibFunc_atan2l_finite); 655 TLI.setUnavailable(LibFunc_atanh_finite); 656 TLI.setUnavailable(LibFunc_atanhf_finite); 657 TLI.setUnavailable(LibFunc_atanhl_finite); 658 TLI.setUnavailable(LibFunc_cosh_finite); 659 TLI.setUnavailable(LibFunc_coshf_finite); 660 TLI.setUnavailable(LibFunc_coshl_finite); 661 TLI.setUnavailable(LibFunc_exp10_finite); 662 TLI.setUnavailable(LibFunc_exp10f_finite); 663 TLI.setUnavailable(LibFunc_exp10l_finite); 664 TLI.setUnavailable(LibFunc_exp2_finite); 665 TLI.setUnavailable(LibFunc_exp2f_finite); 666 TLI.setUnavailable(LibFunc_exp2l_finite); 667 TLI.setUnavailable(LibFunc_exp_finite); 668 TLI.setUnavailable(LibFunc_expf_finite); 669 TLI.setUnavailable(LibFunc_expl_finite); 670 TLI.setUnavailable(LibFunc_log10_finite); 671 TLI.setUnavailable(LibFunc_log10f_finite); 672 TLI.setUnavailable(LibFunc_log10l_finite); 673 TLI.setUnavailable(LibFunc_log2_finite); 674 TLI.setUnavailable(LibFunc_log2f_finite); 675 TLI.setUnavailable(LibFunc_log2l_finite); 676 TLI.setUnavailable(LibFunc_log_finite); 677 TLI.setUnavailable(LibFunc_logf_finite); 678 TLI.setUnavailable(LibFunc_logl_finite); 679 TLI.setUnavailable(LibFunc_pow_finite); 680 TLI.setUnavailable(LibFunc_powf_finite); 681 TLI.setUnavailable(LibFunc_powl_finite); 682 TLI.setUnavailable(LibFunc_sinh_finite); 683 TLI.setUnavailable(LibFunc_sinhf_finite); 684 TLI.setUnavailable(LibFunc_sinhl_finite); 685 TLI.setUnavailable(LibFunc_sqrt_finite); 686 TLI.setUnavailable(LibFunc_sqrtf_finite); 687 TLI.setUnavailable(LibFunc_sqrtl_finite); 688 } 689 690 if ((T.isOSLinux() && T.isGNUEnvironment()) || 691 (T.isAndroid() && !T.isAndroidVersionLT(28))) { 692 // available IO unlocked variants on GNU/Linux and Android P or later 693 TLI.setAvailable(LibFunc_getc_unlocked); 694 TLI.setAvailable(LibFunc_getchar_unlocked); 695 TLI.setAvailable(LibFunc_putc_unlocked); 696 TLI.setAvailable(LibFunc_putchar_unlocked); 697 TLI.setAvailable(LibFunc_fputc_unlocked); 698 TLI.setAvailable(LibFunc_fgetc_unlocked); 699 TLI.setAvailable(LibFunc_fread_unlocked); 700 TLI.setAvailable(LibFunc_fwrite_unlocked); 701 TLI.setAvailable(LibFunc_fputs_unlocked); 702 TLI.setAvailable(LibFunc_fgets_unlocked); 703 } 704 705 if (T.isAndroid() && T.isAndroidVersionLT(21)) { 706 TLI.setUnavailable(LibFunc_stpcpy); 707 TLI.setUnavailable(LibFunc_stpncpy); 708 } 709 710 if (T.isPS()) { 711 // PS4/PS5 do have memalign. 712 TLI.setAvailable(LibFunc_memalign); 713 714 // PS4/PS5 do not have new/delete with "unsigned int" size parameter; 715 // they only have the "unsigned long" versions. 716 TLI.setUnavailable(LibFunc_ZdaPvj); 717 TLI.setUnavailable(LibFunc_ZdaPvjSt11align_val_t); 718 TLI.setUnavailable(LibFunc_ZdlPvj); 719 TLI.setUnavailable(LibFunc_ZdlPvjSt11align_val_t); 720 TLI.setUnavailable(LibFunc_Znaj); 721 TLI.setUnavailable(LibFunc_ZnajRKSt9nothrow_t); 722 TLI.setUnavailable(LibFunc_ZnajSt11align_val_t); 723 TLI.setUnavailable(LibFunc_ZnajSt11align_val_tRKSt9nothrow_t); 724 TLI.setUnavailable(LibFunc_Znwj); 725 TLI.setUnavailable(LibFunc_ZnwjRKSt9nothrow_t); 726 TLI.setUnavailable(LibFunc_ZnwjSt11align_val_t); 727 TLI.setUnavailable(LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t); 728 729 // None of the *_chk functions. 730 TLI.setUnavailable(LibFunc_memccpy_chk); 731 TLI.setUnavailable(LibFunc_memcpy_chk); 732 TLI.setUnavailable(LibFunc_memmove_chk); 733 TLI.setUnavailable(LibFunc_mempcpy_chk); 734 TLI.setUnavailable(LibFunc_memset_chk); 735 TLI.setUnavailable(LibFunc_snprintf_chk); 736 TLI.setUnavailable(LibFunc_sprintf_chk); 737 TLI.setUnavailable(LibFunc_stpcpy_chk); 738 TLI.setUnavailable(LibFunc_stpncpy_chk); 739 TLI.setUnavailable(LibFunc_strcat_chk); 740 TLI.setUnavailable(LibFunc_strcpy_chk); 741 TLI.setUnavailable(LibFunc_strlcat_chk); 742 TLI.setUnavailable(LibFunc_strlcpy_chk); 743 TLI.setUnavailable(LibFunc_strlen_chk); 744 TLI.setUnavailable(LibFunc_strncat_chk); 745 TLI.setUnavailable(LibFunc_strncpy_chk); 746 TLI.setUnavailable(LibFunc_vsnprintf_chk); 747 TLI.setUnavailable(LibFunc_vsprintf_chk); 748 749 // Various Posix system functions. 750 TLI.setUnavailable(LibFunc_access); 751 TLI.setUnavailable(LibFunc_chmod); 752 TLI.setUnavailable(LibFunc_chown); 753 TLI.setUnavailable(LibFunc_closedir); 754 TLI.setUnavailable(LibFunc_ctermid); 755 TLI.setUnavailable(LibFunc_execl); 756 TLI.setUnavailable(LibFunc_execle); 757 TLI.setUnavailable(LibFunc_execlp); 758 TLI.setUnavailable(LibFunc_execv); 759 TLI.setUnavailable(LibFunc_execvP); 760 TLI.setUnavailable(LibFunc_execve); 761 TLI.setUnavailable(LibFunc_execvp); 762 TLI.setUnavailable(LibFunc_execvpe); 763 TLI.setUnavailable(LibFunc_fork); 764 TLI.setUnavailable(LibFunc_fstat); 765 TLI.setUnavailable(LibFunc_fstatvfs); 766 TLI.setUnavailable(LibFunc_getenv); 767 TLI.setUnavailable(LibFunc_getitimer); 768 TLI.setUnavailable(LibFunc_getlogin_r); 769 TLI.setUnavailable(LibFunc_getpwnam); 770 TLI.setUnavailable(LibFunc_gettimeofday); 771 TLI.setUnavailable(LibFunc_lchown); 772 TLI.setUnavailable(LibFunc_lstat); 773 TLI.setUnavailable(LibFunc_mkdir); 774 TLI.setUnavailable(LibFunc_open); 775 TLI.setUnavailable(LibFunc_opendir); 776 TLI.setUnavailable(LibFunc_pclose); 777 TLI.setUnavailable(LibFunc_popen); 778 TLI.setUnavailable(LibFunc_pread); 779 TLI.setUnavailable(LibFunc_pwrite); 780 TLI.setUnavailable(LibFunc_read); 781 TLI.setUnavailable(LibFunc_readlink); 782 TLI.setUnavailable(LibFunc_realpath); 783 TLI.setUnavailable(LibFunc_rename); 784 TLI.setUnavailable(LibFunc_rmdir); 785 TLI.setUnavailable(LibFunc_setitimer); 786 TLI.setUnavailable(LibFunc_stat); 787 TLI.setUnavailable(LibFunc_statvfs); 788 TLI.setUnavailable(LibFunc_system); 789 TLI.setUnavailable(LibFunc_times); 790 TLI.setUnavailable(LibFunc_tmpfile); 791 TLI.setUnavailable(LibFunc_unlink); 792 TLI.setUnavailable(LibFunc_uname); 793 TLI.setUnavailable(LibFunc_unsetenv); 794 TLI.setUnavailable(LibFunc_utime); 795 TLI.setUnavailable(LibFunc_utimes); 796 TLI.setUnavailable(LibFunc_valloc); 797 TLI.setUnavailable(LibFunc_write); 798 799 // Miscellaneous other functions not provided. 800 TLI.setUnavailable(LibFunc_atomic_load); 801 TLI.setUnavailable(LibFunc_atomic_store); 802 TLI.setUnavailable(LibFunc___kmpc_alloc_shared); 803 TLI.setUnavailable(LibFunc___kmpc_free_shared); 804 TLI.setUnavailable(LibFunc_dunder_strndup); 805 TLI.setUnavailable(LibFunc_bcmp); 806 TLI.setUnavailable(LibFunc_bcopy); 807 TLI.setUnavailable(LibFunc_bzero); 808 TLI.setUnavailable(LibFunc_cabs); 809 TLI.setUnavailable(LibFunc_cabsf); 810 TLI.setUnavailable(LibFunc_cabsl); 811 TLI.setUnavailable(LibFunc_ffs); 812 TLI.setUnavailable(LibFunc_flockfile); 813 TLI.setUnavailable(LibFunc_fseeko); 814 TLI.setUnavailable(LibFunc_ftello); 815 TLI.setUnavailable(LibFunc_ftrylockfile); 816 TLI.setUnavailable(LibFunc_funlockfile); 817 TLI.setUnavailable(LibFunc_htonl); 818 TLI.setUnavailable(LibFunc_htons); 819 TLI.setUnavailable(LibFunc_isascii); 820 TLI.setUnavailable(LibFunc_memccpy); 821 TLI.setUnavailable(LibFunc_mempcpy); 822 TLI.setUnavailable(LibFunc_memrchr); 823 TLI.setUnavailable(LibFunc_ntohl); 824 TLI.setUnavailable(LibFunc_ntohs); 825 TLI.setUnavailable(LibFunc_reallocf); 826 TLI.setUnavailable(LibFunc_roundeven); 827 TLI.setUnavailable(LibFunc_roundevenf); 828 TLI.setUnavailable(LibFunc_roundevenl); 829 TLI.setUnavailable(LibFunc_stpcpy); 830 TLI.setUnavailable(LibFunc_stpncpy); 831 TLI.setUnavailable(LibFunc_strlcat); 832 TLI.setUnavailable(LibFunc_strlcpy); 833 TLI.setUnavailable(LibFunc_strndup); 834 TLI.setUnavailable(LibFunc_strnlen); 835 TLI.setUnavailable(LibFunc_toascii); 836 } 837 838 // As currently implemented in clang, NVPTX code has no standard library to 839 // speak of. Headers provide a standard-ish library implementation, but many 840 // of the signatures are wrong -- for example, many libm functions are not 841 // extern "C". 842 // 843 // libdevice, an IR library provided by nvidia, is linked in by the front-end, 844 // but only used functions are provided to llvm. Moreover, most of the 845 // functions in libdevice don't map precisely to standard library functions. 846 // 847 // FIXME: Having no standard library prevents e.g. many fastmath 848 // optimizations, so this situation should be fixed. 849 if (T.isNVPTX()) { 850 TLI.disableAllFunctions(); 851 TLI.setAvailable(LibFunc_nvvm_reflect); 852 TLI.setAvailable(llvm::LibFunc_malloc); 853 TLI.setAvailable(llvm::LibFunc_free); 854 855 // TODO: We could enable the following two according to [0] but we haven't 856 // done an evaluation wrt. the performance implications. 857 // [0] 858 // https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#dynamic-global-memory-allocation-and-operations 859 // 860 // TLI.setAvailable(llvm::LibFunc_memcpy); 861 // TLI.setAvailable(llvm::LibFunc_memset); 862 863 TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared); 864 TLI.setAvailable(llvm::LibFunc___kmpc_free_shared); 865 } else { 866 TLI.setUnavailable(LibFunc_nvvm_reflect); 867 } 868 869 // These vec_malloc/free routines are only available on AIX. 870 if (!T.isOSAIX()) { 871 TLI.setUnavailable(LibFunc_vec_calloc); 872 TLI.setUnavailable(LibFunc_vec_malloc); 873 TLI.setUnavailable(LibFunc_vec_realloc); 874 TLI.setUnavailable(LibFunc_vec_free); 875 } 876 877 TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary, T); 878 } 879 880 TargetLibraryInfoImpl::TargetLibraryInfoImpl() { 881 // Default to everything being available. 882 memset(AvailableArray, -1, sizeof(AvailableArray)); 883 884 initialize(*this, Triple(), StandardNames); 885 } 886 887 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) { 888 // Default to everything being available. 889 memset(AvailableArray, -1, sizeof(AvailableArray)); 890 891 initialize(*this, T, StandardNames); 892 } 893 894 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI) 895 : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param), 896 ShouldExtI32Return(TLI.ShouldExtI32Return), 897 ShouldSignExtI32Param(TLI.ShouldSignExtI32Param), 898 ShouldSignExtI32Return(TLI.ShouldSignExtI32Return), 899 SizeOfInt(TLI.SizeOfInt) { 900 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray)); 901 VectorDescs = TLI.VectorDescs; 902 ScalarDescs = TLI.ScalarDescs; 903 } 904 905 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI) 906 : CustomNames(std::move(TLI.CustomNames)), 907 ShouldExtI32Param(TLI.ShouldExtI32Param), 908 ShouldExtI32Return(TLI.ShouldExtI32Return), 909 ShouldSignExtI32Param(TLI.ShouldSignExtI32Param), 910 ShouldSignExtI32Return(TLI.ShouldSignExtI32Return), 911 SizeOfInt(TLI.SizeOfInt) { 912 std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray), 913 AvailableArray); 914 VectorDescs = TLI.VectorDescs; 915 ScalarDescs = TLI.ScalarDescs; 916 } 917 918 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) { 919 CustomNames = TLI.CustomNames; 920 ShouldExtI32Param = TLI.ShouldExtI32Param; 921 ShouldExtI32Return = TLI.ShouldExtI32Return; 922 ShouldSignExtI32Param = TLI.ShouldSignExtI32Param; 923 ShouldSignExtI32Return = TLI.ShouldSignExtI32Return; 924 SizeOfInt = TLI.SizeOfInt; 925 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray)); 926 return *this; 927 } 928 929 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) { 930 CustomNames = std::move(TLI.CustomNames); 931 ShouldExtI32Param = TLI.ShouldExtI32Param; 932 ShouldExtI32Return = TLI.ShouldExtI32Return; 933 ShouldSignExtI32Param = TLI.ShouldSignExtI32Param; 934 ShouldSignExtI32Return = TLI.ShouldSignExtI32Return; 935 SizeOfInt = TLI.SizeOfInt; 936 std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray), 937 AvailableArray); 938 return *this; 939 } 940 941 static StringRef sanitizeFunctionName(StringRef funcName) { 942 // Filter out empty names and names containing null bytes, those can't be in 943 // our table. 944 if (funcName.empty() || funcName.contains('\0')) 945 return StringRef(); 946 947 // Check for \01 prefix that is used to mangle __asm declarations and 948 // strip it if present. 949 return GlobalValue::dropLLVMManglingEscape(funcName); 950 } 951 952 static DenseMap<StringRef, LibFunc> 953 buildIndexMap(ArrayRef<StringLiteral> StandardNames) { 954 DenseMap<StringRef, LibFunc> Indices; 955 unsigned Idx = 0; 956 Indices.reserve(LibFunc::NumLibFuncs); 957 for (const auto &Func : StandardNames) 958 Indices[Func] = static_cast<LibFunc>(Idx++); 959 return Indices; 960 } 961 962 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName, LibFunc &F) const { 963 funcName = sanitizeFunctionName(funcName); 964 if (funcName.empty()) 965 return false; 966 967 static const DenseMap<StringRef, LibFunc> Indices = 968 buildIndexMap(StandardNames); 969 970 if (auto Loc = Indices.find(funcName); Loc != Indices.end()) { 971 F = Loc->second; 972 return true; 973 } 974 return false; 975 } 976 977 // Return true if ArgTy matches Ty. 978 979 static bool matchType(FuncArgTypeID ArgTy, const Type *Ty, unsigned IntBits, 980 unsigned SizeTBits) { 981 switch (ArgTy) { 982 case Void: 983 return Ty->isVoidTy(); 984 case Bool: 985 return Ty->isIntegerTy(8); 986 case Int16: 987 return Ty->isIntegerTy(16); 988 case Int32: 989 return Ty->isIntegerTy(32); 990 case Int: 991 return Ty->isIntegerTy(IntBits); 992 case IntPlus: 993 return Ty->isIntegerTy() && Ty->getPrimitiveSizeInBits() >= IntBits; 994 case IntX: 995 return Ty->isIntegerTy(); 996 case Long: 997 // TODO: Figure out and use long size. 998 return Ty->isIntegerTy() && Ty->getPrimitiveSizeInBits() >= IntBits; 999 case Int64: 1000 return Ty->isIntegerTy(64); 1001 case LLong: 1002 return Ty->isIntegerTy(64); 1003 case SizeT: 1004 case SSizeT: 1005 return Ty->isIntegerTy(SizeTBits); 1006 case Flt: 1007 return Ty->isFloatTy(); 1008 case Dbl: 1009 return Ty->isDoubleTy(); 1010 // TODO: Tighten this up. 1011 case LDbl: 1012 return Ty->isFloatingPointTy(); 1013 case Floating: 1014 return Ty->isFloatingPointTy(); 1015 case Ptr: 1016 return Ty->isPointerTy(); 1017 case Struct: 1018 return Ty->isStructTy(); 1019 default: 1020 break; 1021 } 1022 1023 llvm_unreachable("Invalid type"); 1024 } 1025 1026 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy, 1027 LibFunc F, 1028 const Module &M) const { 1029 unsigned NumParams = FTy.getNumParams(); 1030 1031 switch (F) { 1032 // Special handling for <complex.h> functions: 1033 case LibFunc_cabs: 1034 case LibFunc_cabsf: 1035 case LibFunc_cabsl: { 1036 Type *RetTy = FTy.getReturnType(); 1037 if (!RetTy->isFloatingPointTy()) 1038 return false; 1039 1040 Type *ParamTy = FTy.getParamType(0); 1041 // NOTE: These prototypes are target specific and currently support 1042 // "complex" passed as an array or discrete real & imaginary parameters. 1043 // Add other calling conventions to enable libcall optimizations. 1044 if (NumParams == 1) 1045 return (ParamTy->isArrayTy() && ParamTy->getArrayNumElements() == 2 && 1046 ParamTy->getArrayElementType() == RetTy); 1047 else if (NumParams == 2) 1048 return ParamTy == RetTy && FTy.getParamType(1) == RetTy; 1049 1050 return false; 1051 } 1052 // Special handling for the sincospi functions that return either 1053 // a struct or vector: 1054 case LibFunc_sincospi_stret: 1055 case LibFunc_sincospif_stret: { 1056 if (NumParams != 1) 1057 return false; 1058 1059 Type *RetTy = FTy.getReturnType(); 1060 Type *ParamTy = FTy.getParamType(0); 1061 if (auto *Ty = dyn_cast<StructType>(RetTy)) { 1062 if (Ty->getNumElements() != 2) 1063 return false; 1064 return (Ty->getElementType(0) == ParamTy && 1065 Ty->getElementType(1) == ParamTy); 1066 } 1067 1068 if (auto *Ty = dyn_cast<FixedVectorType>(RetTy)) { 1069 if (Ty->getNumElements() != 2) 1070 return false; 1071 return Ty->getElementType() == ParamTy; 1072 } 1073 1074 return false; 1075 } 1076 1077 default: 1078 break; 1079 } 1080 1081 unsigned IntBits = getIntSize(); 1082 unsigned SizeTBits = getSizeTSize(M); 1083 unsigned Idx = 0; 1084 1085 // Iterate over the type ids in the function prototype, matching each 1086 // against the function's type FTy, starting with its return type. 1087 // Return true if both match in number and kind, inclduing the ellipsis. 1088 Type *Ty = FTy.getReturnType(), *LastTy = Ty; 1089 const auto &ProtoTypes = Signatures[F]; 1090 for (auto TyID : ProtoTypes) { 1091 if (Idx && TyID == Void) 1092 // Except in the first position where it designates the function's 1093 // return type Void ends the argument list. 1094 break; 1095 1096 if (TyID == Ellip) { 1097 // The ellipsis ends the protoype list but is not a part of FTy's 1098 // argument list. Except when it's last it must be followed by 1099 // Void. 1100 assert(Idx == ProtoTypes.size() - 1 || ProtoTypes[Idx + 1] == Void); 1101 return FTy.isFunctionVarArg(); 1102 } 1103 1104 if (TyID == Same) { 1105 assert(Idx != 0 && "Type ID 'Same' must not be first!"); 1106 if (Ty != LastTy) 1107 return false; 1108 } else { 1109 if (!Ty || !matchType(TyID, Ty, IntBits, SizeTBits)) 1110 return false; 1111 LastTy = Ty; 1112 } 1113 1114 if (Idx == NumParams) { 1115 // There's at least one and at most two more type ids than there are 1116 // arguments in FTy's argument list. 1117 Ty = nullptr; 1118 ++Idx; 1119 continue; 1120 } 1121 1122 Ty = FTy.getParamType(Idx++); 1123 } 1124 1125 // Return success only if all entries on both lists have been processed 1126 // and the function is not a variadic one. 1127 return Idx == NumParams + 1 && !FTy.isFunctionVarArg(); 1128 } 1129 1130 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl, 1131 LibFunc &F) const { 1132 // Intrinsics don't overlap w/libcalls; if our module has a large number of 1133 // intrinsics, this ends up being an interesting compile time win since we 1134 // avoid string normalization and comparison. 1135 if (FDecl.isIntrinsic()) return false; 1136 1137 const Module *M = FDecl.getParent(); 1138 assert(M && "Expecting FDecl to be connected to a Module."); 1139 1140 if (FDecl.LibFuncCache == Function::UnknownLibFunc) 1141 if (!getLibFunc(FDecl.getName(), FDecl.LibFuncCache)) 1142 FDecl.LibFuncCache = NotLibFunc; 1143 1144 if (FDecl.LibFuncCache == NotLibFunc) 1145 return false; 1146 1147 F = FDecl.LibFuncCache; 1148 return isValidProtoForLibFunc(*FDecl.getFunctionType(), F, *M); 1149 } 1150 1151 bool TargetLibraryInfoImpl::getLibFunc(unsigned int Opcode, Type *Ty, 1152 LibFunc &F) const { 1153 // Must be a frem instruction with float or double arguments. 1154 if (Opcode != Instruction::FRem || (!Ty->isDoubleTy() && !Ty->isFloatTy())) 1155 return false; 1156 1157 F = Ty->isDoubleTy() ? LibFunc_fmod : LibFunc_fmodf; 1158 return true; 1159 } 1160 1161 void TargetLibraryInfoImpl::disableAllFunctions() { 1162 memset(AvailableArray, 0, sizeof(AvailableArray)); 1163 } 1164 1165 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) { 1166 return LHS.getScalarFnName() < RHS.getScalarFnName(); 1167 } 1168 1169 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) { 1170 return LHS.getVectorFnName() < RHS.getVectorFnName(); 1171 } 1172 1173 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) { 1174 return LHS.getScalarFnName() < S; 1175 } 1176 1177 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) { 1178 llvm::append_range(VectorDescs, Fns); 1179 llvm::sort(VectorDescs, compareByScalarFnName); 1180 1181 llvm::append_range(ScalarDescs, Fns); 1182 llvm::sort(ScalarDescs, compareByVectorFnName); 1183 } 1184 1185 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib( 1186 enum VectorLibrary VecLib, const llvm::Triple &TargetTriple) { 1187 switch (VecLib) { 1188 case Accelerate: { 1189 const VecDesc VecFuncs[] = { 1190 #define TLI_DEFINE_ACCELERATE_VECFUNCS 1191 #include "llvm/Analysis/VecFuncs.def" 1192 }; 1193 addVectorizableFunctions(VecFuncs); 1194 break; 1195 } 1196 case DarwinLibSystemM: { 1197 const VecDesc VecFuncs[] = { 1198 #define TLI_DEFINE_DARWIN_LIBSYSTEM_M_VECFUNCS 1199 #include "llvm/Analysis/VecFuncs.def" 1200 }; 1201 addVectorizableFunctions(VecFuncs); 1202 break; 1203 } 1204 case LIBMVEC_X86: { 1205 const VecDesc VecFuncs[] = { 1206 #define TLI_DEFINE_LIBMVEC_X86_VECFUNCS 1207 #include "llvm/Analysis/VecFuncs.def" 1208 }; 1209 addVectorizableFunctions(VecFuncs); 1210 break; 1211 } 1212 case MASSV: { 1213 const VecDesc VecFuncs[] = { 1214 #define TLI_DEFINE_MASSV_VECFUNCS 1215 #include "llvm/Analysis/VecFuncs.def" 1216 }; 1217 addVectorizableFunctions(VecFuncs); 1218 break; 1219 } 1220 case SVML: { 1221 const VecDesc VecFuncs[] = { 1222 #define TLI_DEFINE_SVML_VECFUNCS 1223 #include "llvm/Analysis/VecFuncs.def" 1224 }; 1225 addVectorizableFunctions(VecFuncs); 1226 break; 1227 } 1228 case SLEEFGNUABI: { 1229 const VecDesc VecFuncs_VF2[] = { 1230 #define TLI_DEFINE_SLEEFGNUABI_VF2_VECFUNCS 1231 #define TLI_DEFINE_VECFUNC(SCAL, VEC, VF, VABI_PREFIX) \ 1232 {SCAL, VEC, VF, /* MASK = */ false, VABI_PREFIX}, 1233 #include "llvm/Analysis/VecFuncs.def" 1234 }; 1235 const VecDesc VecFuncs_VF4[] = { 1236 #define TLI_DEFINE_SLEEFGNUABI_VF4_VECFUNCS 1237 #define TLI_DEFINE_VECFUNC(SCAL, VEC, VF, VABI_PREFIX) \ 1238 {SCAL, VEC, VF, /* MASK = */ false, VABI_PREFIX}, 1239 #include "llvm/Analysis/VecFuncs.def" 1240 }; 1241 const VecDesc VecFuncs_VFScalable[] = { 1242 #define TLI_DEFINE_SLEEFGNUABI_SCALABLE_VECFUNCS 1243 #define TLI_DEFINE_VECFUNC(SCAL, VEC, VF, MASK, VABI_PREFIX) \ 1244 {SCAL, VEC, VF, MASK, VABI_PREFIX}, 1245 #include "llvm/Analysis/VecFuncs.def" 1246 }; 1247 1248 switch (TargetTriple.getArch()) { 1249 default: 1250 break; 1251 case llvm::Triple::aarch64: 1252 case llvm::Triple::aarch64_be: 1253 addVectorizableFunctions(VecFuncs_VF2); 1254 addVectorizableFunctions(VecFuncs_VF4); 1255 addVectorizableFunctions(VecFuncs_VFScalable); 1256 break; 1257 } 1258 break; 1259 } 1260 case ArmPL: { 1261 const VecDesc VecFuncs[] = { 1262 #define TLI_DEFINE_ARMPL_VECFUNCS 1263 #define TLI_DEFINE_VECFUNC(SCAL, VEC, VF, MASK, VABI_PREFIX) \ 1264 {SCAL, VEC, VF, MASK, VABI_PREFIX}, 1265 #include "llvm/Analysis/VecFuncs.def" 1266 }; 1267 1268 switch (TargetTriple.getArch()) { 1269 default: 1270 break; 1271 case llvm::Triple::aarch64: 1272 case llvm::Triple::aarch64_be: 1273 addVectorizableFunctions(VecFuncs); 1274 break; 1275 } 1276 break; 1277 } 1278 case AMDLIBM: { 1279 const VecDesc VecFuncs[] = { 1280 #define TLI_DEFINE_AMDLIBM_VECFUNCS 1281 #define TLI_DEFINE_VECFUNC(SCAL, VEC, VF, MASK, VABI_PREFIX) \ 1282 {SCAL, VEC, VF, MASK, VABI_PREFIX}, 1283 #include "llvm/Analysis/VecFuncs.def" 1284 }; 1285 addVectorizableFunctions(VecFuncs); 1286 break; 1287 } 1288 case NoLibrary: 1289 break; 1290 } 1291 } 1292 1293 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const { 1294 funcName = sanitizeFunctionName(funcName); 1295 if (funcName.empty()) 1296 return false; 1297 1298 std::vector<VecDesc>::const_iterator I = 1299 llvm::lower_bound(VectorDescs, funcName, compareWithScalarFnName); 1300 return I != VectorDescs.end() && StringRef(I->getScalarFnName()) == funcName; 1301 } 1302 1303 StringRef TargetLibraryInfoImpl::getVectorizedFunction(StringRef F, 1304 const ElementCount &VF, 1305 bool Masked) const { 1306 const VecDesc *VD = getVectorMappingInfo(F, VF, Masked); 1307 if (VD) 1308 return VD->getVectorFnName(); 1309 return StringRef(); 1310 } 1311 1312 const VecDesc * 1313 TargetLibraryInfoImpl::getVectorMappingInfo(StringRef F, const ElementCount &VF, 1314 bool Masked) const { 1315 F = sanitizeFunctionName(F); 1316 if (F.empty()) 1317 return nullptr; 1318 std::vector<VecDesc>::const_iterator I = 1319 llvm::lower_bound(VectorDescs, F, compareWithScalarFnName); 1320 while (I != VectorDescs.end() && StringRef(I->getScalarFnName()) == F) { 1321 if ((I->getVectorizationFactor() == VF) && (I->isMasked() == Masked)) 1322 return &(*I); 1323 ++I; 1324 } 1325 return nullptr; 1326 } 1327 1328 TargetLibraryInfo TargetLibraryAnalysis::run(const Function &F, 1329 FunctionAnalysisManager &) { 1330 if (!BaselineInfoImpl) 1331 BaselineInfoImpl = 1332 TargetLibraryInfoImpl(Triple(F.getParent()->getTargetTriple())); 1333 return TargetLibraryInfo(*BaselineInfoImpl, &F); 1334 } 1335 1336 unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const { 1337 if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>( 1338 M.getModuleFlag("wchar_size"))) 1339 return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue(); 1340 return 0; 1341 } 1342 1343 unsigned TargetLibraryInfoImpl::getSizeTSize(const Module &M) const { 1344 // There is really no guarantee that sizeof(size_t) is equal to sizeof(int*). 1345 // If that isn't true then it should be possible to derive the SizeTTy from 1346 // the target triple here instead and do an early return. 1347 1348 // Historically LLVM assume that size_t has same size as intptr_t (hence 1349 // deriving the size from sizeof(int*) in address space zero). This should 1350 // work for most targets. For future consideration: DataLayout also implement 1351 // getIndexSizeInBits which might map better to size_t compared to 1352 // getPointerSizeInBits. Hard coding address space zero here might be 1353 // unfortunate as well. Maybe getDefaultGlobalsAddressSpace() or 1354 // getAllocaAddrSpace() is better. 1355 unsigned AddressSpace = 0; 1356 return M.getDataLayout().getPointerSizeInBits(AddressSpace); 1357 } 1358 1359 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass() 1360 : ImmutablePass(ID), TLA(TargetLibraryInfoImpl()) { 1361 initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry()); 1362 } 1363 1364 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T) 1365 : ImmutablePass(ID), TLA(TargetLibraryInfoImpl(T)) { 1366 initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry()); 1367 } 1368 1369 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass( 1370 const TargetLibraryInfoImpl &TLIImpl) 1371 : ImmutablePass(ID), TLA(TLIImpl) { 1372 initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry()); 1373 } 1374 1375 AnalysisKey TargetLibraryAnalysis::Key; 1376 1377 // Register the basic pass. 1378 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo", 1379 "Target Library Information", false, true) 1380 char TargetLibraryInfoWrapperPass::ID = 0; 1381 1382 void TargetLibraryInfoWrapperPass::anchor() {} 1383 1384 void TargetLibraryInfoImpl::getWidestVF(StringRef ScalarF, 1385 ElementCount &FixedVF, 1386 ElementCount &ScalableVF) const { 1387 ScalarF = sanitizeFunctionName(ScalarF); 1388 // Use '0' here because a type of the form <vscale x 1 x ElTy> is not the 1389 // same as a scalar. 1390 ScalableVF = ElementCount::getScalable(0); 1391 FixedVF = ElementCount::getFixed(1); 1392 if (ScalarF.empty()) 1393 return; 1394 1395 std::vector<VecDesc>::const_iterator I = 1396 llvm::lower_bound(VectorDescs, ScalarF, compareWithScalarFnName); 1397 while (I != VectorDescs.end() && StringRef(I->getScalarFnName()) == ScalarF) { 1398 ElementCount *VF = 1399 I->getVectorizationFactor().isScalable() ? &ScalableVF : &FixedVF; 1400 if (ElementCount::isKnownGT(I->getVectorizationFactor(), *VF)) 1401 *VF = I->getVectorizationFactor(); 1402 ++I; 1403 } 1404 } 1405