1 //===--- AArch64.cpp - AArch64 (not ARM) Helpers for Tools ------*- C++ -*-===// 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 #include "AArch64.h" 10 #include "clang/Driver/Driver.h" 11 #include "clang/Driver/DriverDiagnostic.h" 12 #include "clang/Driver/Options.h" 13 #include "llvm/Option/ArgList.h" 14 #include "llvm/Support/TargetParser.h" 15 #include "llvm/Support/Host.h" 16 17 using namespace clang::driver; 18 using namespace clang::driver::tools; 19 using namespace clang; 20 using namespace llvm::opt; 21 22 /// \returns true if the given triple can determine the default CPU type even 23 /// if -arch is not specified. 24 static bool isCPUDeterminedByTriple(const llvm::Triple &Triple) { 25 return Triple.isOSDarwin(); 26 } 27 28 /// getAArch64TargetCPU - Get the (LLVM) name of the AArch64 cpu we are 29 /// targeting. Set \p A to the Arg corresponding to the -mcpu argument if it is 30 /// provided, or to nullptr otherwise. 31 std::string aarch64::getAArch64TargetCPU(const ArgList &Args, 32 const llvm::Triple &Triple, Arg *&A) { 33 std::string CPU; 34 // If we have -mcpu, use that. 35 if ((A = Args.getLastArg(options::OPT_mcpu_EQ))) { 36 StringRef Mcpu = A->getValue(); 37 CPU = Mcpu.split("+").first.lower(); 38 } 39 40 // Handle CPU name is 'native'. 41 if (CPU == "native") 42 return std::string(llvm::sys::getHostCPUName()); 43 44 if (CPU.size()) 45 return CPU; 46 47 if (Triple.isTargetMachineMac() && 48 Triple.getArch() == llvm::Triple::aarch64) { 49 // Apple Silicon macs default to M1 CPUs. 50 return "apple-m1"; 51 } 52 53 // arm64e requires v8.3a and only runs on apple-a12 and later CPUs. 54 if (Triple.isArm64e()) 55 return "apple-a12"; 56 57 // Make sure we pick the appropriate Apple CPU if -arch is used or when 58 // targetting a Darwin OS. 59 if (Args.getLastArg(options::OPT_arch) || Triple.isOSDarwin()) 60 return Triple.getArch() == llvm::Triple::aarch64_32 ? "apple-s4" 61 : "apple-a7"; 62 63 return "generic"; 64 } 65 66 // Decode AArch64 features from string like +[no]featureA+[no]featureB+... 67 static bool DecodeAArch64Features(const Driver &D, StringRef text, 68 std::vector<StringRef> &Features, 69 llvm::AArch64::ArchKind ArchKind) { 70 SmallVector<StringRef, 8> Split; 71 text.split(Split, StringRef("+"), -1, false); 72 73 for (StringRef Feature : Split) { 74 StringRef FeatureName = llvm::AArch64::getArchExtFeature(Feature); 75 if (!FeatureName.empty()) 76 Features.push_back(FeatureName); 77 else if (Feature == "neon" || Feature == "noneon") 78 D.Diag(clang::diag::err_drv_no_neon_modifier); 79 else 80 return false; 81 82 if (Feature == "sve2") 83 Features.push_back("+sve"); 84 else if (Feature == "sve2-bitperm" || Feature == "sve2-sha3" || 85 Feature == "sve2-aes" || Feature == "sve2-sm4") { 86 Features.push_back("+sve"); 87 Features.push_back("+sve2"); 88 } else if (Feature == "nosve") { 89 Features.push_back("-sve2"); 90 Features.push_back("-sve2-bitperm"); 91 Features.push_back("-sve2-sha3"); 92 Features.push_back("-sve2-aes"); 93 Features.push_back("-sve2-sm4"); 94 } else if (Feature == "nosve2") { 95 Features.push_back("-sve2-bitperm"); 96 Features.push_back("-sve2-sha3"); 97 Features.push_back("-sve2-aes"); 98 Features.push_back("-sve2-sm4"); 99 } 100 101 // +sve implies +f32mm if the base architecture is v8.6A, v8.7A, v9.1A or 102 // v9.2A. It isn't the case in general that sve implies both f64mm and f32mm 103 if ((ArchKind == llvm::AArch64::ArchKind::ARMV8_6A || 104 ArchKind == llvm::AArch64::ArchKind::ARMV8_7A || 105 ArchKind == llvm::AArch64::ArchKind::ARMV9_1A || 106 ArchKind == llvm::AArch64::ArchKind::ARMV9_2A) && 107 Feature == "sve") 108 Features.push_back("+f32mm"); 109 } 110 return true; 111 } 112 113 // Check if the CPU name and feature modifiers in -mcpu are legal. If yes, 114 // decode CPU and feature. 115 static bool DecodeAArch64Mcpu(const Driver &D, StringRef Mcpu, StringRef &CPU, 116 std::vector<StringRef> &Features) { 117 std::pair<StringRef, StringRef> Split = Mcpu.split("+"); 118 CPU = Split.first; 119 llvm::AArch64::ArchKind ArchKind = llvm::AArch64::ArchKind::ARMV8A; 120 121 if (CPU == "native") 122 CPU = llvm::sys::getHostCPUName(); 123 124 if (CPU == "generic") { 125 Features.push_back("+neon"); 126 } else { 127 ArchKind = llvm::AArch64::parseCPUArch(CPU); 128 if (!llvm::AArch64::getArchFeatures(ArchKind, Features)) 129 return false; 130 131 uint64_t Extension = llvm::AArch64::getDefaultExtensions(CPU, ArchKind); 132 if (!llvm::AArch64::getExtensionFeatures(Extension, Features)) 133 return false; 134 } 135 136 if (Split.second.size() && 137 !DecodeAArch64Features(D, Split.second, Features, ArchKind)) 138 return false; 139 140 return true; 141 } 142 143 static bool 144 getAArch64ArchFeaturesFromMarch(const Driver &D, StringRef March, 145 const ArgList &Args, 146 std::vector<StringRef> &Features) { 147 std::string MarchLowerCase = March.lower(); 148 std::pair<StringRef, StringRef> Split = StringRef(MarchLowerCase).split("+"); 149 150 llvm::AArch64::ArchKind ArchKind = llvm::AArch64::parseArch(Split.first); 151 if (ArchKind == llvm::AArch64::ArchKind::INVALID || 152 !llvm::AArch64::getArchFeatures(ArchKind, Features)) 153 return false; 154 155 // Enable SVE2 by default on Armv9-A. 156 // It can still be disabled if +nosve2 is present. 157 // We must do this early so that DecodeAArch64Features has the correct state 158 if ((ArchKind == llvm::AArch64::ArchKind::ARMV9A || 159 ArchKind == llvm::AArch64::ArchKind::ARMV9_1A || 160 ArchKind == llvm::AArch64::ArchKind::ARMV9_2A)) { 161 Features.push_back("+sve"); 162 Features.push_back("+sve2"); 163 } 164 165 if ((Split.second.size() && 166 !DecodeAArch64Features(D, Split.second, Features, ArchKind))) 167 return false; 168 169 return true; 170 } 171 172 static bool 173 getAArch64ArchFeaturesFromMcpu(const Driver &D, StringRef Mcpu, 174 const ArgList &Args, 175 std::vector<StringRef> &Features) { 176 StringRef CPU; 177 std::string McpuLowerCase = Mcpu.lower(); 178 if (!DecodeAArch64Mcpu(D, McpuLowerCase, CPU, Features)) 179 return false; 180 181 return true; 182 } 183 184 static bool 185 getAArch64MicroArchFeaturesFromMtune(const Driver &D, StringRef Mtune, 186 const ArgList &Args, 187 std::vector<StringRef> &Features) { 188 std::string MtuneLowerCase = Mtune.lower(); 189 // Check CPU name is valid 190 std::vector<StringRef> MtuneFeatures; 191 StringRef Tune; 192 if (!DecodeAArch64Mcpu(D, MtuneLowerCase, Tune, MtuneFeatures)) 193 return false; 194 195 // Handle CPU name is 'native'. 196 if (MtuneLowerCase == "native") 197 MtuneLowerCase = std::string(llvm::sys::getHostCPUName()); 198 if (MtuneLowerCase == "cyclone" || 199 StringRef(MtuneLowerCase).startswith("apple")) { 200 Features.push_back("+zcm"); 201 Features.push_back("+zcz"); 202 } 203 return true; 204 } 205 206 static bool 207 getAArch64MicroArchFeaturesFromMcpu(const Driver &D, StringRef Mcpu, 208 const ArgList &Args, 209 std::vector<StringRef> &Features) { 210 StringRef CPU; 211 std::vector<StringRef> DecodedFeature; 212 std::string McpuLowerCase = Mcpu.lower(); 213 if (!DecodeAArch64Mcpu(D, McpuLowerCase, CPU, DecodedFeature)) 214 return false; 215 216 return getAArch64MicroArchFeaturesFromMtune(D, CPU, Args, Features); 217 } 218 219 void aarch64::getAArch64TargetFeatures(const Driver &D, 220 const llvm::Triple &Triple, 221 const ArgList &Args, 222 std::vector<StringRef> &Features, 223 bool ForAS) { 224 Arg *A; 225 bool success = true; 226 // Enable NEON by default. 227 Features.push_back("+neon"); 228 llvm::StringRef WaMArch; 229 if (ForAS) 230 for (const auto *A : 231 Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) 232 for (StringRef Value : A->getValues()) 233 if (Value.startswith("-march=")) 234 WaMArch = Value.substr(7); 235 // Call getAArch64ArchFeaturesFromMarch only if "-Wa,-march=" or 236 // "-Xassembler -march" is detected. Otherwise it may return false 237 // and causes Clang to error out. 238 if (!WaMArch.empty()) 239 success = getAArch64ArchFeaturesFromMarch(D, WaMArch, Args, Features); 240 else if ((A = Args.getLastArg(options::OPT_march_EQ))) 241 success = getAArch64ArchFeaturesFromMarch(D, A->getValue(), Args, Features); 242 else if ((A = Args.getLastArg(options::OPT_mcpu_EQ))) 243 success = getAArch64ArchFeaturesFromMcpu(D, A->getValue(), Args, Features); 244 else if (Args.hasArg(options::OPT_arch) || isCPUDeterminedByTriple(Triple)) 245 success = getAArch64ArchFeaturesFromMcpu( 246 D, getAArch64TargetCPU(Args, Triple, A), Args, Features); 247 else 248 // Default to 'A' profile if the architecture is not specified. 249 success = getAArch64ArchFeaturesFromMarch(D, "armv8-a", Args, Features); 250 251 if (success && (A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ))) 252 success = 253 getAArch64MicroArchFeaturesFromMtune(D, A->getValue(), Args, Features); 254 else if (success && (A = Args.getLastArg(options::OPT_mcpu_EQ))) 255 success = 256 getAArch64MicroArchFeaturesFromMcpu(D, A->getValue(), Args, Features); 257 else if (success && 258 (Args.hasArg(options::OPT_arch) || isCPUDeterminedByTriple(Triple))) 259 success = getAArch64MicroArchFeaturesFromMcpu( 260 D, getAArch64TargetCPU(Args, Triple, A), Args, Features); 261 262 if (!success) { 263 auto Diag = D.Diag(diag::err_drv_clang_unsupported); 264 // If "-Wa,-march=" is used, 'WaMArch' will contain the argument's value, 265 // while 'A' is uninitialized. Only dereference 'A' in the other case. 266 if (!WaMArch.empty()) 267 Diag << "-march=" + WaMArch.str(); 268 else 269 Diag << A->getAsString(Args); 270 } 271 272 if (Args.getLastArg(options::OPT_mgeneral_regs_only)) { 273 Features.push_back("-fp-armv8"); 274 Features.push_back("-crypto"); 275 Features.push_back("-neon"); 276 } 277 278 if (Arg *A = Args.getLastArg(options::OPT_mtp_mode_EQ)) { 279 StringRef Mtp = A->getValue(); 280 if (Mtp == "el3") 281 Features.push_back("+tpidr-el3"); 282 else if (Mtp == "el2") 283 Features.push_back("+tpidr-el2"); 284 else if (Mtp == "el1") 285 Features.push_back("+tpidr-el1"); 286 else if (Mtp != "el0") 287 D.Diag(diag::err_drv_invalid_mtp) << A->getAsString(Args); 288 } 289 290 // Enable/disable straight line speculation hardening. 291 if (Arg *A = Args.getLastArg(options::OPT_mharden_sls_EQ)) { 292 StringRef Scope = A->getValue(); 293 bool EnableRetBr = false; 294 bool EnableBlr = false; 295 bool DisableComdat = false; 296 if (Scope != "none") { 297 SmallVector<StringRef, 4> Opts; 298 Scope.split(Opts, ","); 299 for (auto Opt : Opts) { 300 Opt = Opt.trim(); 301 if (Opt == "all") { 302 EnableBlr = true; 303 EnableRetBr = true; 304 continue; 305 } 306 if (Opt == "retbr") { 307 EnableRetBr = true; 308 continue; 309 } 310 if (Opt == "blr") { 311 EnableBlr = true; 312 continue; 313 } 314 if (Opt == "comdat") { 315 DisableComdat = false; 316 continue; 317 } 318 if (Opt == "nocomdat") { 319 DisableComdat = true; 320 continue; 321 } 322 D.Diag(diag::err_invalid_sls_hardening) 323 << Scope << A->getAsString(Args); 324 break; 325 } 326 } 327 328 if (EnableRetBr) 329 Features.push_back("+harden-sls-retbr"); 330 if (EnableBlr) 331 Features.push_back("+harden-sls-blr"); 332 if (DisableComdat) { 333 Features.push_back("+harden-sls-nocomdat"); 334 } 335 } 336 337 // En/disable crc 338 if (Arg *A = Args.getLastArg(options::OPT_mcrc, options::OPT_mnocrc)) { 339 if (A->getOption().matches(options::OPT_mcrc)) 340 Features.push_back("+crc"); 341 else 342 Features.push_back("-crc"); 343 } 344 345 // Handle (arch-dependent) fp16fml/fullfp16 relationship. 346 // FIXME: this fp16fml option handling will be reimplemented after the 347 // TargetParser rewrite. 348 const auto ItRNoFullFP16 = std::find(Features.rbegin(), Features.rend(), "-fullfp16"); 349 const auto ItRFP16FML = std::find(Features.rbegin(), Features.rend(), "+fp16fml"); 350 if (llvm::is_contained(Features, "+v8.4a")) { 351 const auto ItRFullFP16 = std::find(Features.rbegin(), Features.rend(), "+fullfp16"); 352 if (ItRFullFP16 < ItRNoFullFP16 && ItRFullFP16 < ItRFP16FML) { 353 // Only entangled feature that can be to the right of this +fullfp16 is -fp16fml. 354 // Only append the +fp16fml if there is no -fp16fml after the +fullfp16. 355 if (std::find(Features.rbegin(), ItRFullFP16, "-fp16fml") == ItRFullFP16) 356 Features.push_back("+fp16fml"); 357 } 358 else 359 goto fp16_fml_fallthrough; 360 } else { 361 fp16_fml_fallthrough: 362 // In both of these cases, putting the 'other' feature on the end of the vector will 363 // result in the same effect as placing it immediately after the current feature. 364 if (ItRNoFullFP16 < ItRFP16FML) 365 Features.push_back("-fp16fml"); 366 else if (ItRNoFullFP16 > ItRFP16FML) 367 Features.push_back("+fullfp16"); 368 } 369 370 // FIXME: this needs reimplementation too after the TargetParser rewrite 371 // 372 // Context sensitive meaning of Crypto: 373 // 1) For Arch >= ARMv8.4a: crypto = sm4 + sha3 + sha2 + aes 374 // 2) For Arch <= ARMv8.3a: crypto = sha2 + aes 375 const auto ItBegin = Features.begin(); 376 const auto ItEnd = Features.end(); 377 const auto ItRBegin = Features.rbegin(); 378 const auto ItREnd = Features.rend(); 379 const auto ItRCrypto = std::find(ItRBegin, ItREnd, "+crypto"); 380 const auto ItRNoCrypto = std::find(ItRBegin, ItREnd, "-crypto"); 381 const auto HasCrypto = ItRCrypto != ItREnd; 382 const auto HasNoCrypto = ItRNoCrypto != ItREnd; 383 const ptrdiff_t PosCrypto = ItRCrypto - ItRBegin; 384 const ptrdiff_t PosNoCrypto = ItRNoCrypto - ItRBegin; 385 386 bool NoCrypto = false; 387 if (HasCrypto && HasNoCrypto) { 388 if (PosNoCrypto < PosCrypto) 389 NoCrypto = true; 390 } 391 392 if (std::find(ItBegin, ItEnd, "+v8.4a") != ItEnd || 393 std::find(ItBegin, ItEnd, "+v9a") != ItEnd || 394 std::find(ItBegin, ItEnd, "+v9.1a") != ItEnd || 395 std::find(ItBegin, ItEnd, "+v9.2a") != ItEnd) { 396 if (HasCrypto && !NoCrypto) { 397 // Check if we have NOT disabled an algorithm with something like: 398 // +crypto, -algorithm 399 // And if "-algorithm" does not occur, we enable that crypto algorithm. 400 const bool HasSM4 = (std::find(ItBegin, ItEnd, "-sm4") == ItEnd); 401 const bool HasSHA3 = (std::find(ItBegin, ItEnd, "-sha3") == ItEnd); 402 const bool HasSHA2 = (std::find(ItBegin, ItEnd, "-sha2") == ItEnd); 403 const bool HasAES = (std::find(ItBegin, ItEnd, "-aes") == ItEnd); 404 if (HasSM4) 405 Features.push_back("+sm4"); 406 if (HasSHA3) 407 Features.push_back("+sha3"); 408 if (HasSHA2) 409 Features.push_back("+sha2"); 410 if (HasAES) 411 Features.push_back("+aes"); 412 } else if (HasNoCrypto) { 413 // Check if we have NOT enabled a crypto algorithm with something like: 414 // -crypto, +algorithm 415 // And if "+algorithm" does not occur, we disable that crypto algorithm. 416 const bool HasSM4 = (std::find(ItBegin, ItEnd, "+sm4") != ItEnd); 417 const bool HasSHA3 = (std::find(ItBegin, ItEnd, "+sha3") != ItEnd); 418 const bool HasSHA2 = (std::find(ItBegin, ItEnd, "+sha2") != ItEnd); 419 const bool HasAES = (std::find(ItBegin, ItEnd, "+aes") != ItEnd); 420 if (!HasSM4) 421 Features.push_back("-sm4"); 422 if (!HasSHA3) 423 Features.push_back("-sha3"); 424 if (!HasSHA2) 425 Features.push_back("-sha2"); 426 if (!HasAES) 427 Features.push_back("-aes"); 428 } 429 } else { 430 if (HasCrypto && !NoCrypto) { 431 const bool HasSHA2 = (std::find(ItBegin, ItEnd, "-sha2") == ItEnd); 432 const bool HasAES = (std::find(ItBegin, ItEnd, "-aes") == ItEnd); 433 if (HasSHA2) 434 Features.push_back("+sha2"); 435 if (HasAES) 436 Features.push_back("+aes"); 437 } else if (HasNoCrypto) { 438 const bool HasSHA2 = (std::find(ItBegin, ItEnd, "+sha2") != ItEnd); 439 const bool HasAES = (std::find(ItBegin, ItEnd, "+aes") != ItEnd); 440 const bool HasV82a = (std::find(ItBegin, ItEnd, "+v8.2a") != ItEnd); 441 const bool HasV83a = (std::find(ItBegin, ItEnd, "+v8.3a") != ItEnd); 442 const bool HasV84a = (std::find(ItBegin, ItEnd, "+v8.4a") != ItEnd); 443 if (!HasSHA2) 444 Features.push_back("-sha2"); 445 if (!HasAES) 446 Features.push_back("-aes"); 447 if (HasV82a || HasV83a || HasV84a) { 448 Features.push_back("-sm4"); 449 Features.push_back("-sha3"); 450 } 451 } 452 } 453 454 const char *Archs[] = {"+v8.6a", "+v8.7a", "+v9.1a", "+v9.2a"}; 455 auto Pos = std::find_first_of(Features.begin(), Features.end(), 456 std::begin(Archs), std::end(Archs)); 457 if (Pos != std::end(Features)) 458 Pos = Features.insert(std::next(Pos), {"+i8mm", "+bf16"}); 459 460 if (Arg *A = Args.getLastArg(options::OPT_mno_unaligned_access, 461 options::OPT_munaligned_access)) { 462 if (A->getOption().matches(options::OPT_mno_unaligned_access)) 463 Features.push_back("+strict-align"); 464 } else if (Triple.isOSOpenBSD()) 465 Features.push_back("+strict-align"); 466 467 if (Args.hasArg(options::OPT_ffixed_x1)) 468 Features.push_back("+reserve-x1"); 469 470 if (Args.hasArg(options::OPT_ffixed_x2)) 471 Features.push_back("+reserve-x2"); 472 473 if (Args.hasArg(options::OPT_ffixed_x3)) 474 Features.push_back("+reserve-x3"); 475 476 if (Args.hasArg(options::OPT_ffixed_x4)) 477 Features.push_back("+reserve-x4"); 478 479 if (Args.hasArg(options::OPT_ffixed_x5)) 480 Features.push_back("+reserve-x5"); 481 482 if (Args.hasArg(options::OPT_ffixed_x6)) 483 Features.push_back("+reserve-x6"); 484 485 if (Args.hasArg(options::OPT_ffixed_x7)) 486 Features.push_back("+reserve-x7"); 487 488 if (Args.hasArg(options::OPT_ffixed_x9)) 489 Features.push_back("+reserve-x9"); 490 491 if (Args.hasArg(options::OPT_ffixed_x10)) 492 Features.push_back("+reserve-x10"); 493 494 if (Args.hasArg(options::OPT_ffixed_x11)) 495 Features.push_back("+reserve-x11"); 496 497 if (Args.hasArg(options::OPT_ffixed_x12)) 498 Features.push_back("+reserve-x12"); 499 500 if (Args.hasArg(options::OPT_ffixed_x13)) 501 Features.push_back("+reserve-x13"); 502 503 if (Args.hasArg(options::OPT_ffixed_x14)) 504 Features.push_back("+reserve-x14"); 505 506 if (Args.hasArg(options::OPT_ffixed_x15)) 507 Features.push_back("+reserve-x15"); 508 509 if (Args.hasArg(options::OPT_ffixed_x18)) 510 Features.push_back("+reserve-x18"); 511 512 if (Args.hasArg(options::OPT_ffixed_x20)) 513 Features.push_back("+reserve-x20"); 514 515 if (Args.hasArg(options::OPT_ffixed_x21)) 516 Features.push_back("+reserve-x21"); 517 518 if (Args.hasArg(options::OPT_ffixed_x22)) 519 Features.push_back("+reserve-x22"); 520 521 if (Args.hasArg(options::OPT_ffixed_x23)) 522 Features.push_back("+reserve-x23"); 523 524 if (Args.hasArg(options::OPT_ffixed_x24)) 525 Features.push_back("+reserve-x24"); 526 527 if (Args.hasArg(options::OPT_ffixed_x25)) 528 Features.push_back("+reserve-x25"); 529 530 if (Args.hasArg(options::OPT_ffixed_x26)) 531 Features.push_back("+reserve-x26"); 532 533 if (Args.hasArg(options::OPT_ffixed_x27)) 534 Features.push_back("+reserve-x27"); 535 536 if (Args.hasArg(options::OPT_ffixed_x28)) 537 Features.push_back("+reserve-x28"); 538 539 if (Args.hasArg(options::OPT_ffixed_x30)) 540 Features.push_back("+reserve-x30"); 541 542 if (Args.hasArg(options::OPT_fcall_saved_x8)) 543 Features.push_back("+call-saved-x8"); 544 545 if (Args.hasArg(options::OPT_fcall_saved_x9)) 546 Features.push_back("+call-saved-x9"); 547 548 if (Args.hasArg(options::OPT_fcall_saved_x10)) 549 Features.push_back("+call-saved-x10"); 550 551 if (Args.hasArg(options::OPT_fcall_saved_x11)) 552 Features.push_back("+call-saved-x11"); 553 554 if (Args.hasArg(options::OPT_fcall_saved_x12)) 555 Features.push_back("+call-saved-x12"); 556 557 if (Args.hasArg(options::OPT_fcall_saved_x13)) 558 Features.push_back("+call-saved-x13"); 559 560 if (Args.hasArg(options::OPT_fcall_saved_x14)) 561 Features.push_back("+call-saved-x14"); 562 563 if (Args.hasArg(options::OPT_fcall_saved_x15)) 564 Features.push_back("+call-saved-x15"); 565 566 if (Args.hasArg(options::OPT_fcall_saved_x18)) 567 Features.push_back("+call-saved-x18"); 568 569 if (Args.hasArg(options::OPT_mno_neg_immediates)) 570 Features.push_back("+no-neg-immediates"); 571 } 572