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