Clang.cpp revision 317778
1//===--- LLVM.cpp - Clang+LLVM ToolChain Implementations --------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#include "Clang.h" 11#include "Arch/AArch64.h" 12#include "Arch/ARM.h" 13#include "Arch/Mips.h" 14#include "Arch/PPC.h" 15#include "Arch/Sparc.h" 16#include "Arch/SystemZ.h" 17#include "Arch/X86.h" 18#include "CommonArgs.h" 19#include "Hexagon.h" 20#include "InputInfo.h" 21#include "PS4CPU.h" 22#include "clang/Basic/CharInfo.h" 23#include "clang/Basic/LangOptions.h" 24#include "clang/Basic/ObjCRuntime.h" 25#include "clang/Basic/Version.h" 26#include "clang/Config/config.h" 27#include "clang/Driver/DriverDiagnostic.h" 28#include "clang/Driver/Options.h" 29#include "clang/Driver/SanitizerArgs.h" 30#include "clang/Driver/XRayArgs.h" 31#include "llvm/ADT/StringExtras.h" 32#include "llvm/Option/ArgList.h" 33#include "llvm/Support/CodeGen.h" 34#include "llvm/Support/Compression.h" 35#include "llvm/Support/FileSystem.h" 36#include "llvm/Support/Path.h" 37#include "llvm/Support/Process.h" 38#include "llvm/Support/YAMLParser.h" 39 40#ifdef LLVM_ON_UNIX 41#include <unistd.h> // For getuid(). 42#endif 43 44using namespace clang::driver; 45using namespace clang::driver::tools; 46using namespace clang; 47using namespace llvm::opt; 48 49static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args) { 50 if (Arg *A = 51 Args.getLastArg(clang::driver::options::OPT_C, options::OPT_CC)) { 52 if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_P) && 53 !Args.hasArg(options::OPT__SLASH_EP) && !D.CCCIsCPP()) { 54 D.Diag(clang::diag::err_drv_argument_only_allowed_with) 55 << A->getBaseArg().getAsString(Args) 56 << (D.IsCLMode() ? "/E, /P or /EP" : "-E"); 57 } 58 } 59} 60 61static void CheckCodeGenerationOptions(const Driver &D, const ArgList &Args) { 62 // In gcc, only ARM checks this, but it seems reasonable to check universally. 63 if (Args.hasArg(options::OPT_static)) 64 if (const Arg *A = 65 Args.getLastArg(options::OPT_dynamic, options::OPT_mdynamic_no_pic)) 66 D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args) 67 << "-static"; 68} 69 70// Add backslashes to escape spaces and other backslashes. 71// This is used for the space-separated argument list specified with 72// the -dwarf-debug-flags option. 73static void EscapeSpacesAndBackslashes(const char *Arg, 74 SmallVectorImpl<char> &Res) { 75 for (; *Arg; ++Arg) { 76 switch (*Arg) { 77 default: 78 break; 79 case ' ': 80 case '\\': 81 Res.push_back('\\'); 82 break; 83 } 84 Res.push_back(*Arg); 85 } 86} 87 88// Quote target names for inclusion in GNU Make dependency files. 89// Only the characters '$', '#', ' ', '\t' are quoted. 90static void QuoteTarget(StringRef Target, SmallVectorImpl<char> &Res) { 91 for (unsigned i = 0, e = Target.size(); i != e; ++i) { 92 switch (Target[i]) { 93 case ' ': 94 case '\t': 95 // Escape the preceding backslashes 96 for (int j = i - 1; j >= 0 && Target[j] == '\\'; --j) 97 Res.push_back('\\'); 98 99 // Escape the space/tab 100 Res.push_back('\\'); 101 break; 102 case '$': 103 Res.push_back('$'); 104 break; 105 case '#': 106 Res.push_back('\\'); 107 break; 108 default: 109 break; 110 } 111 112 Res.push_back(Target[i]); 113 } 114} 115 116/// Apply \a Work on the current tool chain \a RegularToolChain and any other 117/// offloading tool chain that is associated with the current action \a JA. 118static void 119forAllAssociatedToolChains(Compilation &C, const JobAction &JA, 120 const ToolChain &RegularToolChain, 121 llvm::function_ref<void(const ToolChain &)> Work) { 122 // Apply Work on the current/regular tool chain. 123 Work(RegularToolChain); 124 125 // Apply Work on all the offloading tool chains associated with the current 126 // action. 127 if (JA.isHostOffloading(Action::OFK_Cuda)) 128 Work(*C.getSingleOffloadToolChain<Action::OFK_Cuda>()); 129 else if (JA.isDeviceOffloading(Action::OFK_Cuda)) 130 Work(*C.getSingleOffloadToolChain<Action::OFK_Host>()); 131 132 // 133 // TODO: Add support for other offloading programming models here. 134 // 135} 136 137/// This is a helper function for validating the optional refinement step 138/// parameter in reciprocal argument strings. Return false if there is an error 139/// parsing the refinement step. Otherwise, return true and set the Position 140/// of the refinement step in the input string. 141static bool getRefinementStep(StringRef In, const Driver &D, 142 const Arg &A, size_t &Position) { 143 const char RefinementStepToken = ':'; 144 Position = In.find(RefinementStepToken); 145 if (Position != StringRef::npos) { 146 StringRef Option = A.getOption().getName(); 147 StringRef RefStep = In.substr(Position + 1); 148 // Allow exactly one numeric character for the additional refinement 149 // step parameter. This is reasonable for all currently-supported 150 // operations and architectures because we would expect that a larger value 151 // of refinement steps would cause the estimate "optimization" to 152 // under-perform the native operation. Also, if the estimate does not 153 // converge quickly, it probably will not ever converge, so further 154 // refinement steps will not produce a better answer. 155 if (RefStep.size() != 1) { 156 D.Diag(diag::err_drv_invalid_value) << Option << RefStep; 157 return false; 158 } 159 char RefStepChar = RefStep[0]; 160 if (RefStepChar < '0' || RefStepChar > '9') { 161 D.Diag(diag::err_drv_invalid_value) << Option << RefStep; 162 return false; 163 } 164 } 165 return true; 166} 167 168/// The -mrecip flag requires processing of many optional parameters. 169static void ParseMRecip(const Driver &D, const ArgList &Args, 170 ArgStringList &OutStrings) { 171 StringRef DisabledPrefixIn = "!"; 172 StringRef DisabledPrefixOut = "!"; 173 StringRef EnabledPrefixOut = ""; 174 StringRef Out = "-mrecip="; 175 176 Arg *A = Args.getLastArg(options::OPT_mrecip, options::OPT_mrecip_EQ); 177 if (!A) 178 return; 179 180 unsigned NumOptions = A->getNumValues(); 181 if (NumOptions == 0) { 182 // No option is the same as "all". 183 OutStrings.push_back(Args.MakeArgString(Out + "all")); 184 return; 185 } 186 187 // Pass through "all", "none", or "default" with an optional refinement step. 188 if (NumOptions == 1) { 189 StringRef Val = A->getValue(0); 190 size_t RefStepLoc; 191 if (!getRefinementStep(Val, D, *A, RefStepLoc)) 192 return; 193 StringRef ValBase = Val.slice(0, RefStepLoc); 194 if (ValBase == "all" || ValBase == "none" || ValBase == "default") { 195 OutStrings.push_back(Args.MakeArgString(Out + Val)); 196 return; 197 } 198 } 199 200 // Each reciprocal type may be enabled or disabled individually. 201 // Check each input value for validity, concatenate them all back together, 202 // and pass through. 203 204 llvm::StringMap<bool> OptionStrings; 205 OptionStrings.insert(std::make_pair("divd", false)); 206 OptionStrings.insert(std::make_pair("divf", false)); 207 OptionStrings.insert(std::make_pair("vec-divd", false)); 208 OptionStrings.insert(std::make_pair("vec-divf", false)); 209 OptionStrings.insert(std::make_pair("sqrtd", false)); 210 OptionStrings.insert(std::make_pair("sqrtf", false)); 211 OptionStrings.insert(std::make_pair("vec-sqrtd", false)); 212 OptionStrings.insert(std::make_pair("vec-sqrtf", false)); 213 214 for (unsigned i = 0; i != NumOptions; ++i) { 215 StringRef Val = A->getValue(i); 216 217 bool IsDisabled = Val.startswith(DisabledPrefixIn); 218 // Ignore the disablement token for string matching. 219 if (IsDisabled) 220 Val = Val.substr(1); 221 222 size_t RefStep; 223 if (!getRefinementStep(Val, D, *A, RefStep)) 224 return; 225 226 StringRef ValBase = Val.slice(0, RefStep); 227 llvm::StringMap<bool>::iterator OptionIter = OptionStrings.find(ValBase); 228 if (OptionIter == OptionStrings.end()) { 229 // Try again specifying float suffix. 230 OptionIter = OptionStrings.find(ValBase.str() + 'f'); 231 if (OptionIter == OptionStrings.end()) { 232 // The input name did not match any known option string. 233 D.Diag(diag::err_drv_unknown_argument) << Val; 234 return; 235 } 236 // The option was specified without a float or double suffix. 237 // Make sure that the double entry was not already specified. 238 // The float entry will be checked below. 239 if (OptionStrings[ValBase.str() + 'd']) { 240 D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val; 241 return; 242 } 243 } 244 245 if (OptionIter->second == true) { 246 // Duplicate option specified. 247 D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val; 248 return; 249 } 250 251 // Mark the matched option as found. Do not allow duplicate specifiers. 252 OptionIter->second = true; 253 254 // If the precision was not specified, also mark the double entry as found. 255 if (ValBase.back() != 'f' && ValBase.back() != 'd') 256 OptionStrings[ValBase.str() + 'd'] = true; 257 258 // Build the output string. 259 StringRef Prefix = IsDisabled ? DisabledPrefixOut : EnabledPrefixOut; 260 Out = Args.MakeArgString(Out + Prefix + Val); 261 if (i != NumOptions - 1) 262 Out = Args.MakeArgString(Out + ","); 263 } 264 265 OutStrings.push_back(Args.MakeArgString(Out)); 266} 267 268static void getHexagonTargetFeatures(const ArgList &Args, 269 std::vector<StringRef> &Features) { 270 handleTargetFeaturesGroup(Args, Features, 271 options::OPT_m_hexagon_Features_Group); 272 273 bool UseLongCalls = false; 274 if (Arg *A = Args.getLastArg(options::OPT_mlong_calls, 275 options::OPT_mno_long_calls)) { 276 if (A->getOption().matches(options::OPT_mlong_calls)) 277 UseLongCalls = true; 278 } 279 280 Features.push_back(UseLongCalls ? "+long-calls" : "-long-calls"); 281} 282 283static void getWebAssemblyTargetFeatures(const ArgList &Args, 284 std::vector<StringRef> &Features) { 285 handleTargetFeaturesGroup(Args, Features, options::OPT_m_wasm_Features_Group); 286} 287 288static void getAMDGPUTargetFeatures(const Driver &D, const ArgList &Args, 289 std::vector<StringRef> &Features) { 290 if (const Arg *dAbi = Args.getLastArg(options::OPT_mamdgpu_debugger_abi)) { 291 StringRef value = dAbi->getValue(); 292 if (value == "1.0") { 293 Features.push_back("+amdgpu-debugger-insert-nops"); 294 Features.push_back("+amdgpu-debugger-reserve-regs"); 295 Features.push_back("+amdgpu-debugger-emit-prologue"); 296 } else { 297 D.Diag(diag::err_drv_clang_unsupported) << dAbi->getAsString(Args); 298 } 299 } 300 301 handleTargetFeaturesGroup( 302 Args, Features, options::OPT_m_amdgpu_Features_Group); 303} 304 305static void getTargetFeatures(const ToolChain &TC, const llvm::Triple &Triple, 306 const ArgList &Args, ArgStringList &CmdArgs, 307 bool ForAS) { 308 const Driver &D = TC.getDriver(); 309 std::vector<StringRef> Features; 310 switch (Triple.getArch()) { 311 default: 312 break; 313 case llvm::Triple::mips: 314 case llvm::Triple::mipsel: 315 case llvm::Triple::mips64: 316 case llvm::Triple::mips64el: 317 mips::getMIPSTargetFeatures(D, Triple, Args, Features); 318 break; 319 320 case llvm::Triple::arm: 321 case llvm::Triple::armeb: 322 case llvm::Triple::thumb: 323 case llvm::Triple::thumbeb: 324 arm::getARMTargetFeatures(TC, Triple, Args, CmdArgs, Features, ForAS); 325 break; 326 327 case llvm::Triple::ppc: 328 case llvm::Triple::ppc64: 329 case llvm::Triple::ppc64le: 330 ppc::getPPCTargetFeatures(D, Triple, Args, Features); 331 break; 332 case llvm::Triple::systemz: 333 systemz::getSystemZTargetFeatures(Args, Features); 334 break; 335 case llvm::Triple::aarch64: 336 case llvm::Triple::aarch64_be: 337 aarch64::getAArch64TargetFeatures(D, Args, Features); 338 break; 339 case llvm::Triple::x86: 340 case llvm::Triple::x86_64: 341 x86::getX86TargetFeatures(D, Triple, Args, Features); 342 break; 343 case llvm::Triple::hexagon: 344 getHexagonTargetFeatures(Args, Features); 345 break; 346 case llvm::Triple::wasm32: 347 case llvm::Triple::wasm64: 348 getWebAssemblyTargetFeatures(Args, Features); 349 break; 350 case llvm::Triple::sparc: 351 case llvm::Triple::sparcel: 352 case llvm::Triple::sparcv9: 353 sparc::getSparcTargetFeatures(D, Args, Features); 354 break; 355 case llvm::Triple::r600: 356 case llvm::Triple::amdgcn: 357 getAMDGPUTargetFeatures(D, Args, Features); 358 break; 359 } 360 361 // Find the last of each feature. 362 llvm::StringMap<unsigned> LastOpt; 363 for (unsigned I = 0, N = Features.size(); I < N; ++I) { 364 StringRef Name = Features[I]; 365 assert(Name[0] == '-' || Name[0] == '+'); 366 LastOpt[Name.drop_front(1)] = I; 367 } 368 369 for (unsigned I = 0, N = Features.size(); I < N; ++I) { 370 // If this feature was overridden, ignore it. 371 StringRef Name = Features[I]; 372 llvm::StringMap<unsigned>::iterator LastI = LastOpt.find(Name.drop_front(1)); 373 assert(LastI != LastOpt.end()); 374 unsigned Last = LastI->second; 375 if (Last != I) 376 continue; 377 378 CmdArgs.push_back("-target-feature"); 379 CmdArgs.push_back(Name.data()); 380 } 381} 382 383static bool 384shouldUseExceptionTablesForObjCExceptions(const ObjCRuntime &runtime, 385 const llvm::Triple &Triple) { 386 // We use the zero-cost exception tables for Objective-C if the non-fragile 387 // ABI is enabled or when compiling for x86_64 and ARM on Snow Leopard and 388 // later. 389 if (runtime.isNonFragile()) 390 return true; 391 392 if (!Triple.isMacOSX()) 393 return false; 394 395 return (!Triple.isMacOSXVersionLT(10, 5) && 396 (Triple.getArch() == llvm::Triple::x86_64 || 397 Triple.getArch() == llvm::Triple::arm)); 398} 399 400/// Adds exception related arguments to the driver command arguments. There's a 401/// master flag, -fexceptions and also language specific flags to enable/disable 402/// C++ and Objective-C exceptions. This makes it possible to for example 403/// disable C++ exceptions but enable Objective-C exceptions. 404static void addExceptionArgs(const ArgList &Args, types::ID InputType, 405 const ToolChain &TC, bool KernelOrKext, 406 const ObjCRuntime &objcRuntime, 407 ArgStringList &CmdArgs) { 408 const Driver &D = TC.getDriver(); 409 const llvm::Triple &Triple = TC.getTriple(); 410 411 if (KernelOrKext) { 412 // -mkernel and -fapple-kext imply no exceptions, so claim exception related 413 // arguments now to avoid warnings about unused arguments. 414 Args.ClaimAllArgs(options::OPT_fexceptions); 415 Args.ClaimAllArgs(options::OPT_fno_exceptions); 416 Args.ClaimAllArgs(options::OPT_fobjc_exceptions); 417 Args.ClaimAllArgs(options::OPT_fno_objc_exceptions); 418 Args.ClaimAllArgs(options::OPT_fcxx_exceptions); 419 Args.ClaimAllArgs(options::OPT_fno_cxx_exceptions); 420 return; 421 } 422 423 // See if the user explicitly enabled exceptions. 424 bool EH = Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions, 425 false); 426 427 // Obj-C exceptions are enabled by default, regardless of -fexceptions. This 428 // is not necessarily sensible, but follows GCC. 429 if (types::isObjC(InputType) && 430 Args.hasFlag(options::OPT_fobjc_exceptions, 431 options::OPT_fno_objc_exceptions, true)) { 432 CmdArgs.push_back("-fobjc-exceptions"); 433 434 EH |= shouldUseExceptionTablesForObjCExceptions(objcRuntime, Triple); 435 } 436 437 if (types::isCXX(InputType)) { 438 // Disable C++ EH by default on XCore and PS4. 439 bool CXXExceptionsEnabled = 440 Triple.getArch() != llvm::Triple::xcore && !Triple.isPS4CPU(); 441 Arg *ExceptionArg = Args.getLastArg( 442 options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions, 443 options::OPT_fexceptions, options::OPT_fno_exceptions); 444 if (ExceptionArg) 445 CXXExceptionsEnabled = 446 ExceptionArg->getOption().matches(options::OPT_fcxx_exceptions) || 447 ExceptionArg->getOption().matches(options::OPT_fexceptions); 448 449 if (CXXExceptionsEnabled) { 450 if (Triple.isPS4CPU()) { 451 ToolChain::RTTIMode RTTIMode = TC.getRTTIMode(); 452 assert(ExceptionArg && 453 "On the PS4 exceptions should only be enabled if passing " 454 "an argument"); 455 if (RTTIMode == ToolChain::RM_DisabledExplicitly) { 456 const Arg *RTTIArg = TC.getRTTIArg(); 457 assert(RTTIArg && "RTTI disabled explicitly but no RTTIArg!"); 458 D.Diag(diag::err_drv_argument_not_allowed_with) 459 << RTTIArg->getAsString(Args) << ExceptionArg->getAsString(Args); 460 } else if (RTTIMode == ToolChain::RM_EnabledImplicitly) 461 D.Diag(diag::warn_drv_enabling_rtti_with_exceptions); 462 } else 463 assert(TC.getRTTIMode() != ToolChain::RM_DisabledImplicitly); 464 465 CmdArgs.push_back("-fcxx-exceptions"); 466 467 EH = true; 468 } 469 } 470 471 if (EH) 472 CmdArgs.push_back("-fexceptions"); 473} 474 475static bool ShouldDisableAutolink(const ArgList &Args, const ToolChain &TC) { 476 bool Default = true; 477 if (TC.getTriple().isOSDarwin()) { 478 // The native darwin assembler doesn't support the linker_option directives, 479 // so we disable them if we think the .s file will be passed to it. 480 Default = TC.useIntegratedAs(); 481 } 482 return !Args.hasFlag(options::OPT_fautolink, options::OPT_fno_autolink, 483 Default); 484} 485 486static bool ShouldDisableDwarfDirectory(const ArgList &Args, 487 const ToolChain &TC) { 488 bool UseDwarfDirectory = 489 Args.hasFlag(options::OPT_fdwarf_directory_asm, 490 options::OPT_fno_dwarf_directory_asm, TC.useIntegratedAs()); 491 return !UseDwarfDirectory; 492} 493 494// Convert an arg of the form "-gN" or "-ggdbN" or one of their aliases 495// to the corresponding DebugInfoKind. 496static codegenoptions::DebugInfoKind DebugLevelToInfoKind(const Arg &A) { 497 assert(A.getOption().matches(options::OPT_gN_Group) && 498 "Not a -g option that specifies a debug-info level"); 499 if (A.getOption().matches(options::OPT_g0) || 500 A.getOption().matches(options::OPT_ggdb0)) 501 return codegenoptions::NoDebugInfo; 502 if (A.getOption().matches(options::OPT_gline_tables_only) || 503 A.getOption().matches(options::OPT_ggdb1)) 504 return codegenoptions::DebugLineTablesOnly; 505 return codegenoptions::LimitedDebugInfo; 506} 507 508static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) { 509 switch (Triple.getArch()){ 510 default: 511 return false; 512 case llvm::Triple::arm: 513 case llvm::Triple::thumb: 514 // ARM Darwin targets require a frame pointer to be always present to aid 515 // offline debugging via backtraces. 516 return Triple.isOSDarwin(); 517 } 518} 519 520static bool useFramePointerForTargetByDefault(const ArgList &Args, 521 const llvm::Triple &Triple) { 522 switch (Triple.getArch()) { 523 case llvm::Triple::xcore: 524 case llvm::Triple::wasm32: 525 case llvm::Triple::wasm64: 526 // XCore never wants frame pointers, regardless of OS. 527 // WebAssembly never wants frame pointers. 528 return false; 529 default: 530 break; 531 } 532 533 if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI) { 534 switch (Triple.getArch()) { 535 // Don't use a frame pointer on linux if optimizing for certain targets. 536 case llvm::Triple::mips64: 537 case llvm::Triple::mips64el: 538 case llvm::Triple::mips: 539 case llvm::Triple::mipsel: 540 case llvm::Triple::ppc: 541 case llvm::Triple::ppc64: 542 case llvm::Triple::ppc64le: 543 case llvm::Triple::systemz: 544 case llvm::Triple::x86: 545 case llvm::Triple::x86_64: 546 return !areOptimizationsEnabled(Args); 547 default: 548 return true; 549 } 550 } 551 552 if (Triple.isOSWindows()) { 553 switch (Triple.getArch()) { 554 case llvm::Triple::x86: 555 return !areOptimizationsEnabled(Args); 556 case llvm::Triple::x86_64: 557 return Triple.isOSBinFormatMachO(); 558 case llvm::Triple::arm: 559 case llvm::Triple::thumb: 560 // Windows on ARM builds with FPO disabled to aid fast stack walking 561 return true; 562 default: 563 // All other supported Windows ISAs use xdata unwind information, so frame 564 // pointers are not generally useful. 565 return false; 566 } 567 } 568 569 return true; 570} 571 572static bool shouldUseFramePointer(const ArgList &Args, 573 const llvm::Triple &Triple) { 574 if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer, 575 options::OPT_fomit_frame_pointer)) 576 return A->getOption().matches(options::OPT_fno_omit_frame_pointer) || 577 mustUseNonLeafFramePointerForTarget(Triple); 578 579 if (Args.hasArg(options::OPT_pg)) 580 return true; 581 582 return useFramePointerForTargetByDefault(Args, Triple); 583} 584 585static bool shouldUseLeafFramePointer(const ArgList &Args, 586 const llvm::Triple &Triple) { 587 if (Arg *A = Args.getLastArg(options::OPT_mno_omit_leaf_frame_pointer, 588 options::OPT_momit_leaf_frame_pointer)) 589 return A->getOption().matches(options::OPT_mno_omit_leaf_frame_pointer); 590 591 if (Args.hasArg(options::OPT_pg)) 592 return true; 593 594 if (Triple.isPS4CPU()) 595 return false; 596 597 return useFramePointerForTargetByDefault(Args, Triple); 598} 599 600/// Add a CC1 option to specify the debug compilation directory. 601static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs) { 602 SmallString<128> cwd; 603 if (!llvm::sys::fs::current_path(cwd)) { 604 CmdArgs.push_back("-fdebug-compilation-dir"); 605 CmdArgs.push_back(Args.MakeArgString(cwd)); 606 } 607} 608 609/// \brief Vectorize at all optimization levels greater than 1 except for -Oz. 610/// For -Oz the loop vectorizer is disable, while the slp vectorizer is enabled. 611static bool shouldEnableVectorizerAtOLevel(const ArgList &Args, bool isSlpVec) { 612 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) { 613 if (A->getOption().matches(options::OPT_O4) || 614 A->getOption().matches(options::OPT_Ofast)) 615 return true; 616 617 if (A->getOption().matches(options::OPT_O0)) 618 return false; 619 620 assert(A->getOption().matches(options::OPT_O) && "Must have a -O flag"); 621 622 // Vectorize -Os. 623 StringRef S(A->getValue()); 624 if (S == "s") 625 return true; 626 627 // Don't vectorize -Oz, unless it's the slp vectorizer. 628 if (S == "z") 629 return isSlpVec; 630 631 unsigned OptLevel = 0; 632 if (S.getAsInteger(10, OptLevel)) 633 return false; 634 635 return OptLevel > 1; 636 } 637 638 return false; 639} 640 641/// Add -x lang to \p CmdArgs for \p Input. 642static void addDashXForInput(const ArgList &Args, const InputInfo &Input, 643 ArgStringList &CmdArgs) { 644 // When using -verify-pch, we don't want to provide the type 645 // 'precompiled-header' if it was inferred from the file extension 646 if (Args.hasArg(options::OPT_verify_pch) && Input.getType() == types::TY_PCH) 647 return; 648 649 CmdArgs.push_back("-x"); 650 if (Args.hasArg(options::OPT_rewrite_objc)) 651 CmdArgs.push_back(types::getTypeName(types::TY_PP_ObjCXX)); 652 else { 653 // Map the driver type to the frontend type. This is mostly an identity 654 // mapping, except that the distinction between module interface units 655 // and other source files does not exist at the frontend layer. 656 const char *ClangType; 657 switch (Input.getType()) { 658 case types::TY_CXXModule: 659 ClangType = "c++"; 660 break; 661 case types::TY_PP_CXXModule: 662 ClangType = "c++-cpp-output"; 663 break; 664 default: 665 ClangType = types::getTypeName(Input.getType()); 666 break; 667 } 668 CmdArgs.push_back(ClangType); 669 } 670} 671 672static void appendUserToPath(SmallVectorImpl<char> &Result) { 673#ifdef LLVM_ON_UNIX 674 const char *Username = getenv("LOGNAME"); 675#else 676 const char *Username = getenv("USERNAME"); 677#endif 678 if (Username) { 679 // Validate that LoginName can be used in a path, and get its length. 680 size_t Len = 0; 681 for (const char *P = Username; *P; ++P, ++Len) { 682 if (!clang::isAlphanumeric(*P) && *P != '_') { 683 Username = nullptr; 684 break; 685 } 686 } 687 688 if (Username && Len > 0) { 689 Result.append(Username, Username + Len); 690 return; 691 } 692 } 693 694// Fallback to user id. 695#ifdef LLVM_ON_UNIX 696 std::string UID = llvm::utostr(getuid()); 697#else 698 // FIXME: Windows seems to have an 'SID' that might work. 699 std::string UID = "9999"; 700#endif 701 Result.append(UID.begin(), UID.end()); 702} 703 704static void addPGOAndCoverageFlags(Compilation &C, const Driver &D, 705 const InputInfo &Output, const ArgList &Args, 706 ArgStringList &CmdArgs) { 707 708 auto *PGOGenerateArg = Args.getLastArg(options::OPT_fprofile_generate, 709 options::OPT_fprofile_generate_EQ, 710 options::OPT_fno_profile_generate); 711 if (PGOGenerateArg && 712 PGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate)) 713 PGOGenerateArg = nullptr; 714 715 auto *ProfileGenerateArg = Args.getLastArg( 716 options::OPT_fprofile_instr_generate, 717 options::OPT_fprofile_instr_generate_EQ, 718 options::OPT_fno_profile_instr_generate); 719 if (ProfileGenerateArg && 720 ProfileGenerateArg->getOption().matches( 721 options::OPT_fno_profile_instr_generate)) 722 ProfileGenerateArg = nullptr; 723 724 if (PGOGenerateArg && ProfileGenerateArg) 725 D.Diag(diag::err_drv_argument_not_allowed_with) 726 << PGOGenerateArg->getSpelling() << ProfileGenerateArg->getSpelling(); 727 728 auto *ProfileUseArg = getLastProfileUseArg(Args); 729 730 if (PGOGenerateArg && ProfileUseArg) 731 D.Diag(diag::err_drv_argument_not_allowed_with) 732 << ProfileUseArg->getSpelling() << PGOGenerateArg->getSpelling(); 733 734 if (ProfileGenerateArg && ProfileUseArg) 735 D.Diag(diag::err_drv_argument_not_allowed_with) 736 << ProfileGenerateArg->getSpelling() << ProfileUseArg->getSpelling(); 737 738 if (ProfileGenerateArg) { 739 if (ProfileGenerateArg->getOption().matches( 740 options::OPT_fprofile_instr_generate_EQ)) 741 CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-instrument-path=") + 742 ProfileGenerateArg->getValue())); 743 // The default is to use Clang Instrumentation. 744 CmdArgs.push_back("-fprofile-instrument=clang"); 745 } 746 747 if (PGOGenerateArg) { 748 CmdArgs.push_back("-fprofile-instrument=llvm"); 749 if (PGOGenerateArg->getOption().matches( 750 options::OPT_fprofile_generate_EQ)) { 751 SmallString<128> Path(PGOGenerateArg->getValue()); 752 llvm::sys::path::append(Path, "default_%m.profraw"); 753 CmdArgs.push_back( 754 Args.MakeArgString(Twine("-fprofile-instrument-path=") + Path)); 755 } 756 } 757 758 if (ProfileUseArg) { 759 if (ProfileUseArg->getOption().matches(options::OPT_fprofile_instr_use_EQ)) 760 CmdArgs.push_back(Args.MakeArgString( 761 Twine("-fprofile-instrument-use-path=") + ProfileUseArg->getValue())); 762 else if ((ProfileUseArg->getOption().matches( 763 options::OPT_fprofile_use_EQ) || 764 ProfileUseArg->getOption().matches( 765 options::OPT_fprofile_instr_use))) { 766 SmallString<128> Path( 767 ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue()); 768 if (Path.empty() || llvm::sys::fs::is_directory(Path)) 769 llvm::sys::path::append(Path, "default.profdata"); 770 CmdArgs.push_back( 771 Args.MakeArgString(Twine("-fprofile-instrument-use-path=") + Path)); 772 } 773 } 774 775 if (Args.hasArg(options::OPT_ftest_coverage) || 776 Args.hasArg(options::OPT_coverage)) 777 CmdArgs.push_back("-femit-coverage-notes"); 778 if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs, 779 false) || 780 Args.hasArg(options::OPT_coverage)) 781 CmdArgs.push_back("-femit-coverage-data"); 782 783 if (Args.hasFlag(options::OPT_fcoverage_mapping, 784 options::OPT_fno_coverage_mapping, false) && 785 !ProfileGenerateArg) 786 D.Diag(clang::diag::err_drv_argument_only_allowed_with) 787 << "-fcoverage-mapping" 788 << "-fprofile-instr-generate"; 789 790 if (Args.hasFlag(options::OPT_fcoverage_mapping, 791 options::OPT_fno_coverage_mapping, false)) 792 CmdArgs.push_back("-fcoverage-mapping"); 793 794 if (C.getArgs().hasArg(options::OPT_c) || 795 C.getArgs().hasArg(options::OPT_S)) { 796 if (Output.isFilename()) { 797 CmdArgs.push_back("-coverage-notes-file"); 798 SmallString<128> OutputFilename; 799 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o)) 800 OutputFilename = FinalOutput->getValue(); 801 else 802 OutputFilename = llvm::sys::path::filename(Output.getBaseInput()); 803 SmallString<128> CoverageFilename = OutputFilename; 804 if (llvm::sys::path::is_relative(CoverageFilename)) { 805 SmallString<128> Pwd; 806 if (!llvm::sys::fs::current_path(Pwd)) { 807 llvm::sys::path::append(Pwd, CoverageFilename); 808 CoverageFilename.swap(Pwd); 809 } 810 } 811 llvm::sys::path::replace_extension(CoverageFilename, "gcno"); 812 CmdArgs.push_back(Args.MakeArgString(CoverageFilename)); 813 814 // Leave -fprofile-dir= an unused argument unless .gcda emission is 815 // enabled. To be polite, with '-fprofile-arcs -fno-profile-arcs' consider 816 // the flag used. There is no -fno-profile-dir, so the user has no 817 // targeted way to suppress the warning. 818 if (Args.hasArg(options::OPT_fprofile_arcs) || 819 Args.hasArg(options::OPT_coverage)) { 820 CmdArgs.push_back("-coverage-data-file"); 821 if (Arg *FProfileDir = Args.getLastArg(options::OPT_fprofile_dir)) { 822 CoverageFilename = FProfileDir->getValue(); 823 llvm::sys::path::append(CoverageFilename, OutputFilename); 824 } 825 llvm::sys::path::replace_extension(CoverageFilename, "gcda"); 826 CmdArgs.push_back(Args.MakeArgString(CoverageFilename)); 827 } 828 } 829 } 830} 831 832/// \brief Check whether the given input tree contains any compilation actions. 833static bool ContainsCompileAction(const Action *A) { 834 if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A)) 835 return true; 836 837 for (const auto &AI : A->inputs()) 838 if (ContainsCompileAction(AI)) 839 return true; 840 841 return false; 842} 843 844/// \brief Check if -relax-all should be passed to the internal assembler. 845/// This is done by default when compiling non-assembler source with -O0. 846static bool UseRelaxAll(Compilation &C, const ArgList &Args) { 847 bool RelaxDefault = true; 848 849 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) 850 RelaxDefault = A->getOption().matches(options::OPT_O0); 851 852 if (RelaxDefault) { 853 RelaxDefault = false; 854 for (const auto &Act : C.getActions()) { 855 if (ContainsCompileAction(Act)) { 856 RelaxDefault = true; 857 break; 858 } 859 } 860 } 861 862 return Args.hasFlag(options::OPT_mrelax_all, options::OPT_mno_relax_all, 863 RelaxDefault); 864} 865 866// Extract the integer N from a string spelled "-dwarf-N", returning 0 867// on mismatch. The StringRef input (rather than an Arg) allows 868// for use by the "-Xassembler" option parser. 869static unsigned DwarfVersionNum(StringRef ArgValue) { 870 return llvm::StringSwitch<unsigned>(ArgValue) 871 .Case("-gdwarf-2", 2) 872 .Case("-gdwarf-3", 3) 873 .Case("-gdwarf-4", 4) 874 .Case("-gdwarf-5", 5) 875 .Default(0); 876} 877 878static void RenderDebugEnablingArgs(const ArgList &Args, ArgStringList &CmdArgs, 879 codegenoptions::DebugInfoKind DebugInfoKind, 880 unsigned DwarfVersion, 881 llvm::DebuggerKind DebuggerTuning) { 882 switch (DebugInfoKind) { 883 case codegenoptions::DebugLineTablesOnly: 884 CmdArgs.push_back("-debug-info-kind=line-tables-only"); 885 break; 886 case codegenoptions::LimitedDebugInfo: 887 CmdArgs.push_back("-debug-info-kind=limited"); 888 break; 889 case codegenoptions::FullDebugInfo: 890 CmdArgs.push_back("-debug-info-kind=standalone"); 891 break; 892 default: 893 break; 894 } 895 if (DwarfVersion > 0) 896 CmdArgs.push_back( 897 Args.MakeArgString("-dwarf-version=" + Twine(DwarfVersion))); 898 switch (DebuggerTuning) { 899 case llvm::DebuggerKind::GDB: 900 CmdArgs.push_back("-debugger-tuning=gdb"); 901 break; 902 case llvm::DebuggerKind::LLDB: 903 CmdArgs.push_back("-debugger-tuning=lldb"); 904 break; 905 case llvm::DebuggerKind::SCE: 906 CmdArgs.push_back("-debugger-tuning=sce"); 907 break; 908 default: 909 break; 910 } 911} 912 913static const char *RelocationModelName(llvm::Reloc::Model Model) { 914 switch (Model) { 915 case llvm::Reloc::Static: 916 return "static"; 917 case llvm::Reloc::PIC_: 918 return "pic"; 919 case llvm::Reloc::DynamicNoPIC: 920 return "dynamic-no-pic"; 921 case llvm::Reloc::ROPI: 922 return "ropi"; 923 case llvm::Reloc::RWPI: 924 return "rwpi"; 925 case llvm::Reloc::ROPI_RWPI: 926 return "ropi-rwpi"; 927 } 928 llvm_unreachable("Unknown Reloc::Model kind"); 929} 930 931void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA, 932 const Driver &D, const ArgList &Args, 933 ArgStringList &CmdArgs, 934 const InputInfo &Output, 935 const InputInfoList &Inputs) const { 936 Arg *A; 937 const bool IsIAMCU = getToolChain().getTriple().isOSIAMCU(); 938 939 CheckPreprocessingOptions(D, Args); 940 941 Args.AddLastArg(CmdArgs, options::OPT_C); 942 Args.AddLastArg(CmdArgs, options::OPT_CC); 943 944 // Handle dependency file generation. 945 if ((A = Args.getLastArg(options::OPT_M, options::OPT_MM)) || 946 (A = Args.getLastArg(options::OPT_MD)) || 947 (A = Args.getLastArg(options::OPT_MMD))) { 948 // Determine the output location. 949 const char *DepFile; 950 if (Arg *MF = Args.getLastArg(options::OPT_MF)) { 951 DepFile = MF->getValue(); 952 C.addFailureResultFile(DepFile, &JA); 953 } else if (Output.getType() == types::TY_Dependencies) { 954 DepFile = Output.getFilename(); 955 } else if (A->getOption().matches(options::OPT_M) || 956 A->getOption().matches(options::OPT_MM)) { 957 DepFile = "-"; 958 } else { 959 DepFile = getDependencyFileName(Args, Inputs); 960 C.addFailureResultFile(DepFile, &JA); 961 } 962 CmdArgs.push_back("-dependency-file"); 963 CmdArgs.push_back(DepFile); 964 965 // Add a default target if one wasn't specified. 966 if (!Args.hasArg(options::OPT_MT) && !Args.hasArg(options::OPT_MQ)) { 967 const char *DepTarget; 968 969 // If user provided -o, that is the dependency target, except 970 // when we are only generating a dependency file. 971 Arg *OutputOpt = Args.getLastArg(options::OPT_o); 972 if (OutputOpt && Output.getType() != types::TY_Dependencies) { 973 DepTarget = OutputOpt->getValue(); 974 } else { 975 // Otherwise derive from the base input. 976 // 977 // FIXME: This should use the computed output file location. 978 SmallString<128> P(Inputs[0].getBaseInput()); 979 llvm::sys::path::replace_extension(P, "o"); 980 DepTarget = Args.MakeArgString(llvm::sys::path::filename(P)); 981 } 982 983 CmdArgs.push_back("-MT"); 984 SmallString<128> Quoted; 985 QuoteTarget(DepTarget, Quoted); 986 CmdArgs.push_back(Args.MakeArgString(Quoted)); 987 } 988 989 if (A->getOption().matches(options::OPT_M) || 990 A->getOption().matches(options::OPT_MD)) 991 CmdArgs.push_back("-sys-header-deps"); 992 if ((isa<PrecompileJobAction>(JA) && 993 !Args.hasArg(options::OPT_fno_module_file_deps)) || 994 Args.hasArg(options::OPT_fmodule_file_deps)) 995 CmdArgs.push_back("-module-file-deps"); 996 } 997 998 if (Args.hasArg(options::OPT_MG)) { 999 if (!A || A->getOption().matches(options::OPT_MD) || 1000 A->getOption().matches(options::OPT_MMD)) 1001 D.Diag(diag::err_drv_mg_requires_m_or_mm); 1002 CmdArgs.push_back("-MG"); 1003 } 1004 1005 Args.AddLastArg(CmdArgs, options::OPT_MP); 1006 Args.AddLastArg(CmdArgs, options::OPT_MV); 1007 1008 // Convert all -MQ <target> args to -MT <quoted target> 1009 for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) { 1010 A->claim(); 1011 1012 if (A->getOption().matches(options::OPT_MQ)) { 1013 CmdArgs.push_back("-MT"); 1014 SmallString<128> Quoted; 1015 QuoteTarget(A->getValue(), Quoted); 1016 CmdArgs.push_back(Args.MakeArgString(Quoted)); 1017 1018 // -MT flag - no change 1019 } else { 1020 A->render(Args, CmdArgs); 1021 } 1022 } 1023 1024 // Add offload include arguments specific for CUDA. This must happen before 1025 // we -I or -include anything else, because we must pick up the CUDA headers 1026 // from the particular CUDA installation, rather than from e.g. 1027 // /usr/local/include. 1028 if (JA.isOffloading(Action::OFK_Cuda)) 1029 getToolChain().AddCudaIncludeArgs(Args, CmdArgs); 1030 1031 // Add -i* options, and automatically translate to 1032 // -include-pch/-include-pth for transparent PCH support. It's 1033 // wonky, but we include looking for .gch so we can support seamless 1034 // replacement into a build system already set up to be generating 1035 // .gch files. 1036 int YcIndex = -1, YuIndex = -1; 1037 { 1038 int AI = -1; 1039 const Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc); 1040 const Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu); 1041 for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) { 1042 // Walk the whole i_Group and skip non "-include" flags so that the index 1043 // here matches the index in the next loop below. 1044 ++AI; 1045 if (!A->getOption().matches(options::OPT_include)) 1046 continue; 1047 if (YcArg && strcmp(A->getValue(), YcArg->getValue()) == 0) 1048 YcIndex = AI; 1049 if (YuArg && strcmp(A->getValue(), YuArg->getValue()) == 0) 1050 YuIndex = AI; 1051 } 1052 } 1053 if (isa<PrecompileJobAction>(JA) && YcIndex != -1) { 1054 Driver::InputList Inputs; 1055 D.BuildInputs(getToolChain(), C.getArgs(), Inputs); 1056 assert(Inputs.size() == 1 && "Need one input when building pch"); 1057 CmdArgs.push_back(Args.MakeArgString(Twine("-find-pch-source=") + 1058 Inputs[0].second->getValue())); 1059 } 1060 1061 bool RenderedImplicitInclude = false; 1062 int AI = -1; 1063 for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) { 1064 ++AI; 1065 1066 if (getToolChain().getDriver().IsCLMode() && 1067 A->getOption().matches(options::OPT_include)) { 1068 // In clang-cl mode, /Ycfoo.h means that all code up to a foo.h 1069 // include is compiled into foo.h, and everything after goes into 1070 // the .obj file. /Yufoo.h means that all includes prior to and including 1071 // foo.h are completely skipped and replaced with a use of the pch file 1072 // for foo.h. (Each flag can have at most one value, multiple /Yc flags 1073 // just mean that the last one wins.) If /Yc and /Yu are both present 1074 // and refer to the same file, /Yc wins. 1075 // Note that OPT__SLASH_FI gets mapped to OPT_include. 1076 // FIXME: The code here assumes that /Yc and /Yu refer to the same file. 1077 // cl.exe seems to support both flags with different values, but that 1078 // seems strange (which flag does /Fp now refer to?), so don't implement 1079 // that until someone needs it. 1080 int PchIndex = YcIndex != -1 ? YcIndex : YuIndex; 1081 if (PchIndex != -1) { 1082 if (isa<PrecompileJobAction>(JA)) { 1083 // When building the pch, skip all includes after the pch. 1084 assert(YcIndex != -1 && PchIndex == YcIndex); 1085 if (AI >= YcIndex) 1086 continue; 1087 } else { 1088 // When using the pch, skip all includes prior to the pch. 1089 if (AI < PchIndex) { 1090 A->claim(); 1091 continue; 1092 } 1093 if (AI == PchIndex) { 1094 A->claim(); 1095 CmdArgs.push_back("-include-pch"); 1096 CmdArgs.push_back( 1097 Args.MakeArgString(D.GetClPchPath(C, A->getValue()))); 1098 continue; 1099 } 1100 } 1101 } 1102 } else if (A->getOption().matches(options::OPT_include)) { 1103 // Handling of gcc-style gch precompiled headers. 1104 bool IsFirstImplicitInclude = !RenderedImplicitInclude; 1105 RenderedImplicitInclude = true; 1106 1107 // Use PCH if the user requested it. 1108 bool UsePCH = D.CCCUsePCH; 1109 1110 bool FoundPTH = false; 1111 bool FoundPCH = false; 1112 SmallString<128> P(A->getValue()); 1113 // We want the files to have a name like foo.h.pch. Add a dummy extension 1114 // so that replace_extension does the right thing. 1115 P += ".dummy"; 1116 if (UsePCH) { 1117 llvm::sys::path::replace_extension(P, "pch"); 1118 if (llvm::sys::fs::exists(P)) 1119 FoundPCH = true; 1120 } 1121 1122 if (!FoundPCH) { 1123 llvm::sys::path::replace_extension(P, "pth"); 1124 if (llvm::sys::fs::exists(P)) 1125 FoundPTH = true; 1126 } 1127 1128 if (!FoundPCH && !FoundPTH) { 1129 llvm::sys::path::replace_extension(P, "gch"); 1130 if (llvm::sys::fs::exists(P)) { 1131 FoundPCH = UsePCH; 1132 FoundPTH = !UsePCH; 1133 } 1134 } 1135 1136 if (FoundPCH || FoundPTH) { 1137 if (IsFirstImplicitInclude) { 1138 A->claim(); 1139 if (UsePCH) 1140 CmdArgs.push_back("-include-pch"); 1141 else 1142 CmdArgs.push_back("-include-pth"); 1143 CmdArgs.push_back(Args.MakeArgString(P)); 1144 continue; 1145 } else { 1146 // Ignore the PCH if not first on command line and emit warning. 1147 D.Diag(diag::warn_drv_pch_not_first_include) << P 1148 << A->getAsString(Args); 1149 } 1150 } 1151 } else if (A->getOption().matches(options::OPT_isystem_after)) { 1152 // Handling of paths which must come late. These entries are handled by 1153 // the toolchain itself after the resource dir is inserted in the right 1154 // search order. 1155 // Do not claim the argument so that the use of the argument does not 1156 // silently go unnoticed on toolchains which do not honour the option. 1157 continue; 1158 } 1159 1160 // Not translated, render as usual. 1161 A->claim(); 1162 A->render(Args, CmdArgs); 1163 } 1164 1165 Args.AddAllArgs(CmdArgs, 1166 {options::OPT_D, options::OPT_U, options::OPT_I_Group, 1167 options::OPT_F, options::OPT_index_header_map}); 1168 1169 // Add -Wp, and -Xpreprocessor if using the preprocessor. 1170 1171 // FIXME: There is a very unfortunate problem here, some troubled 1172 // souls abuse -Wp, to pass preprocessor options in gcc syntax. To 1173 // really support that we would have to parse and then translate 1174 // those options. :( 1175 Args.AddAllArgValues(CmdArgs, options::OPT_Wp_COMMA, 1176 options::OPT_Xpreprocessor); 1177 1178 // -I- is a deprecated GCC feature, reject it. 1179 if (Arg *A = Args.getLastArg(options::OPT_I_)) 1180 D.Diag(diag::err_drv_I_dash_not_supported) << A->getAsString(Args); 1181 1182 // If we have a --sysroot, and don't have an explicit -isysroot flag, add an 1183 // -isysroot to the CC1 invocation. 1184 StringRef sysroot = C.getSysRoot(); 1185 if (sysroot != "") { 1186 if (!Args.hasArg(options::OPT_isysroot)) { 1187 CmdArgs.push_back("-isysroot"); 1188 CmdArgs.push_back(C.getArgs().MakeArgString(sysroot)); 1189 } 1190 } 1191 1192 // Parse additional include paths from environment variables. 1193 // FIXME: We should probably sink the logic for handling these from the 1194 // frontend into the driver. It will allow deleting 4 otherwise unused flags. 1195 // CPATH - included following the user specified includes (but prior to 1196 // builtin and standard includes). 1197 addDirectoryList(Args, CmdArgs, "-I", "CPATH"); 1198 // C_INCLUDE_PATH - system includes enabled when compiling C. 1199 addDirectoryList(Args, CmdArgs, "-c-isystem", "C_INCLUDE_PATH"); 1200 // CPLUS_INCLUDE_PATH - system includes enabled when compiling C++. 1201 addDirectoryList(Args, CmdArgs, "-cxx-isystem", "CPLUS_INCLUDE_PATH"); 1202 // OBJC_INCLUDE_PATH - system includes enabled when compiling ObjC. 1203 addDirectoryList(Args, CmdArgs, "-objc-isystem", "OBJC_INCLUDE_PATH"); 1204 // OBJCPLUS_INCLUDE_PATH - system includes enabled when compiling ObjC++. 1205 addDirectoryList(Args, CmdArgs, "-objcxx-isystem", "OBJCPLUS_INCLUDE_PATH"); 1206 1207 // While adding the include arguments, we also attempt to retrieve the 1208 // arguments of related offloading toolchains or arguments that are specific 1209 // of an offloading programming model. 1210 1211 // Add C++ include arguments, if needed. 1212 if (types::isCXX(Inputs[0].getType())) 1213 forAllAssociatedToolChains(C, JA, getToolChain(), 1214 [&Args, &CmdArgs](const ToolChain &TC) { 1215 TC.AddClangCXXStdlibIncludeArgs(Args, CmdArgs); 1216 }); 1217 1218 // Add system include arguments for all targets but IAMCU. 1219 if (!IsIAMCU) 1220 forAllAssociatedToolChains(C, JA, getToolChain(), 1221 [&Args, &CmdArgs](const ToolChain &TC) { 1222 TC.AddClangSystemIncludeArgs(Args, CmdArgs); 1223 }); 1224 else { 1225 // For IAMCU add special include arguments. 1226 getToolChain().AddIAMCUIncludeArgs(Args, CmdArgs); 1227 } 1228} 1229 1230// FIXME: Move to target hook. 1231static bool isSignedCharDefault(const llvm::Triple &Triple) { 1232 switch (Triple.getArch()) { 1233 default: 1234 return true; 1235 1236 case llvm::Triple::aarch64: 1237 case llvm::Triple::aarch64_be: 1238 case llvm::Triple::arm: 1239 case llvm::Triple::armeb: 1240 case llvm::Triple::thumb: 1241 case llvm::Triple::thumbeb: 1242 if (Triple.isOSDarwin() || Triple.isOSWindows()) 1243 return true; 1244 return false; 1245 1246 case llvm::Triple::ppc: 1247 case llvm::Triple::ppc64: 1248 if (Triple.isOSDarwin()) 1249 return true; 1250 return false; 1251 1252 case llvm::Triple::hexagon: 1253 case llvm::Triple::ppc64le: 1254 case llvm::Triple::systemz: 1255 case llvm::Triple::xcore: 1256 return false; 1257 } 1258} 1259 1260static bool isNoCommonDefault(const llvm::Triple &Triple) { 1261 switch (Triple.getArch()) { 1262 default: 1263 return false; 1264 1265 case llvm::Triple::xcore: 1266 case llvm::Triple::wasm32: 1267 case llvm::Triple::wasm64: 1268 return true; 1269 } 1270} 1271 1272void Clang::AddARMTargetArgs(const llvm::Triple &Triple, const ArgList &Args, 1273 ArgStringList &CmdArgs, bool KernelOrKext) const { 1274 // Select the ABI to use. 1275 // FIXME: Support -meabi. 1276 // FIXME: Parts of this are duplicated in the backend, unify this somehow. 1277 const char *ABIName = nullptr; 1278 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) { 1279 ABIName = A->getValue(); 1280 } else if (Triple.isOSBinFormatMachO()) { 1281 if (arm::useAAPCSForMachO(Triple)) { 1282 ABIName = "aapcs"; 1283 } else if (Triple.isWatchABI()) { 1284 ABIName = "aapcs16"; 1285 } else { 1286 ABIName = "apcs-gnu"; 1287 } 1288 } else if (Triple.isOSWindows()) { 1289 // FIXME: this is invalid for WindowsCE 1290 ABIName = "aapcs"; 1291 } else { 1292 // Select the default based on the platform. 1293 switch (Triple.getEnvironment()) { 1294 case llvm::Triple::Android: 1295 case llvm::Triple::GNUEABI: 1296 case llvm::Triple::GNUEABIHF: 1297 case llvm::Triple::MuslEABI: 1298 case llvm::Triple::MuslEABIHF: 1299 ABIName = "aapcs-linux"; 1300 break; 1301 case llvm::Triple::EABIHF: 1302 case llvm::Triple::EABI: 1303 ABIName = "aapcs"; 1304 break; 1305 default: 1306 if (Triple.getOS() == llvm::Triple::NetBSD) 1307 ABIName = "apcs-gnu"; 1308 else if (Triple.getOS() == llvm::Triple::OpenBSD) 1309 ABIName = "aapcs-linux"; 1310 else 1311 ABIName = "aapcs"; 1312 break; 1313 } 1314 } 1315 CmdArgs.push_back("-target-abi"); 1316 CmdArgs.push_back(ABIName); 1317 1318 // Determine floating point ABI from the options & target defaults. 1319 arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args); 1320 if (ABI == arm::FloatABI::Soft) { 1321 // Floating point operations and argument passing are soft. 1322 // FIXME: This changes CPP defines, we need -target-soft-float. 1323 CmdArgs.push_back("-msoft-float"); 1324 CmdArgs.push_back("-mfloat-abi"); 1325 CmdArgs.push_back("soft"); 1326 } else if (ABI == arm::FloatABI::SoftFP) { 1327 // Floating point operations are hard, but argument passing is soft. 1328 CmdArgs.push_back("-mfloat-abi"); 1329 CmdArgs.push_back("soft"); 1330 } else { 1331 // Floating point operations and argument passing are hard. 1332 assert(ABI == arm::FloatABI::Hard && "Invalid float abi!"); 1333 CmdArgs.push_back("-mfloat-abi"); 1334 CmdArgs.push_back("hard"); 1335 } 1336 1337 // Forward the -mglobal-merge option for explicit control over the pass. 1338 if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge, 1339 options::OPT_mno_global_merge)) { 1340 CmdArgs.push_back("-backend-option"); 1341 if (A->getOption().matches(options::OPT_mno_global_merge)) 1342 CmdArgs.push_back("-arm-global-merge=false"); 1343 else 1344 CmdArgs.push_back("-arm-global-merge=true"); 1345 } 1346 1347 if (!Args.hasFlag(options::OPT_mimplicit_float, 1348 options::OPT_mno_implicit_float, true)) 1349 CmdArgs.push_back("-no-implicit-float"); 1350} 1351 1352void Clang::AddAArch64TargetArgs(const ArgList &Args, 1353 ArgStringList &CmdArgs) const { 1354 const llvm::Triple &Triple = getToolChain().getEffectiveTriple(); 1355 1356 if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) || 1357 Args.hasArg(options::OPT_mkernel) || 1358 Args.hasArg(options::OPT_fapple_kext)) 1359 CmdArgs.push_back("-disable-red-zone"); 1360 1361 if (!Args.hasFlag(options::OPT_mimplicit_float, 1362 options::OPT_mno_implicit_float, true)) 1363 CmdArgs.push_back("-no-implicit-float"); 1364 1365 const char *ABIName = nullptr; 1366 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) 1367 ABIName = A->getValue(); 1368 else if (Triple.isOSDarwin()) 1369 ABIName = "darwinpcs"; 1370 else 1371 ABIName = "aapcs"; 1372 1373 CmdArgs.push_back("-target-abi"); 1374 CmdArgs.push_back(ABIName); 1375 1376 if (Arg *A = Args.getLastArg(options::OPT_mfix_cortex_a53_835769, 1377 options::OPT_mno_fix_cortex_a53_835769)) { 1378 CmdArgs.push_back("-backend-option"); 1379 if (A->getOption().matches(options::OPT_mfix_cortex_a53_835769)) 1380 CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1"); 1381 else 1382 CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=0"); 1383 } else if (Triple.isAndroid()) { 1384 // Enabled A53 errata (835769) workaround by default on android 1385 CmdArgs.push_back("-backend-option"); 1386 CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1"); 1387 } 1388 1389 // Forward the -mglobal-merge option for explicit control over the pass. 1390 if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge, 1391 options::OPT_mno_global_merge)) { 1392 CmdArgs.push_back("-backend-option"); 1393 if (A->getOption().matches(options::OPT_mno_global_merge)) 1394 CmdArgs.push_back("-aarch64-enable-global-merge=false"); 1395 else 1396 CmdArgs.push_back("-aarch64-enable-global-merge=true"); 1397 } 1398} 1399 1400void Clang::AddMIPSTargetArgs(const ArgList &Args, 1401 ArgStringList &CmdArgs) const { 1402 const Driver &D = getToolChain().getDriver(); 1403 StringRef CPUName; 1404 StringRef ABIName; 1405 const llvm::Triple &Triple = getToolChain().getTriple(); 1406 mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName); 1407 1408 CmdArgs.push_back("-target-abi"); 1409 CmdArgs.push_back(ABIName.data()); 1410 1411 mips::FloatABI ABI = mips::getMipsFloatABI(D, Args); 1412 if (ABI == mips::FloatABI::Soft) { 1413 // Floating point operations and argument passing are soft. 1414 CmdArgs.push_back("-msoft-float"); 1415 CmdArgs.push_back("-mfloat-abi"); 1416 CmdArgs.push_back("soft"); 1417 } else { 1418 // Floating point operations and argument passing are hard. 1419 assert(ABI == mips::FloatABI::Hard && "Invalid float abi!"); 1420 CmdArgs.push_back("-mfloat-abi"); 1421 CmdArgs.push_back("hard"); 1422 } 1423 1424 if (Arg *A = Args.getLastArg(options::OPT_mxgot, options::OPT_mno_xgot)) { 1425 if (A->getOption().matches(options::OPT_mxgot)) { 1426 CmdArgs.push_back("-mllvm"); 1427 CmdArgs.push_back("-mxgot"); 1428 } 1429 } 1430 1431 if (Arg *A = Args.getLastArg(options::OPT_mldc1_sdc1, 1432 options::OPT_mno_ldc1_sdc1)) { 1433 if (A->getOption().matches(options::OPT_mno_ldc1_sdc1)) { 1434 CmdArgs.push_back("-mllvm"); 1435 CmdArgs.push_back("-mno-ldc1-sdc1"); 1436 } 1437 } 1438 1439 if (Arg *A = Args.getLastArg(options::OPT_mcheck_zero_division, 1440 options::OPT_mno_check_zero_division)) { 1441 if (A->getOption().matches(options::OPT_mno_check_zero_division)) { 1442 CmdArgs.push_back("-mllvm"); 1443 CmdArgs.push_back("-mno-check-zero-division"); 1444 } 1445 } 1446 1447 if (Arg *A = Args.getLastArg(options::OPT_G)) { 1448 StringRef v = A->getValue(); 1449 CmdArgs.push_back("-mllvm"); 1450 CmdArgs.push_back(Args.MakeArgString("-mips-ssection-threshold=" + v)); 1451 A->claim(); 1452 } 1453 1454 if (Arg *A = Args.getLastArg(options::OPT_mcompact_branches_EQ)) { 1455 StringRef Val = StringRef(A->getValue()); 1456 if (mips::hasCompactBranches(CPUName)) { 1457 if (Val == "never" || Val == "always" || Val == "optimal") { 1458 CmdArgs.push_back("-mllvm"); 1459 CmdArgs.push_back(Args.MakeArgString("-mips-compact-branches=" + Val)); 1460 } else 1461 D.Diag(diag::err_drv_unsupported_option_argument) 1462 << A->getOption().getName() << Val; 1463 } else 1464 D.Diag(diag::warn_target_unsupported_compact_branches) << CPUName; 1465 } 1466} 1467 1468void Clang::AddPPCTargetArgs(const ArgList &Args, 1469 ArgStringList &CmdArgs) const { 1470 // Select the ABI to use. 1471 const char *ABIName = nullptr; 1472 if (getToolChain().getTriple().isOSLinux()) 1473 switch (getToolChain().getArch()) { 1474 case llvm::Triple::ppc64: { 1475 // When targeting a processor that supports QPX, or if QPX is 1476 // specifically enabled, default to using the ABI that supports QPX (so 1477 // long as it is not specifically disabled). 1478 bool HasQPX = false; 1479 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) 1480 HasQPX = A->getValue() == StringRef("a2q"); 1481 HasQPX = Args.hasFlag(options::OPT_mqpx, options::OPT_mno_qpx, HasQPX); 1482 if (HasQPX) { 1483 ABIName = "elfv1-qpx"; 1484 break; 1485 } 1486 1487 ABIName = "elfv1"; 1488 break; 1489 } 1490 case llvm::Triple::ppc64le: 1491 ABIName = "elfv2"; 1492 break; 1493 default: 1494 break; 1495 } 1496 1497 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) 1498 // The ppc64 linux abis are all "altivec" abis by default. Accept and ignore 1499 // the option if given as we don't have backend support for any targets 1500 // that don't use the altivec abi. 1501 if (StringRef(A->getValue()) != "altivec") 1502 ABIName = A->getValue(); 1503 1504 ppc::FloatABI FloatABI = 1505 ppc::getPPCFloatABI(getToolChain().getDriver(), Args); 1506 1507 if (FloatABI == ppc::FloatABI::Soft) { 1508 // Floating point operations and argument passing are soft. 1509 CmdArgs.push_back("-msoft-float"); 1510 CmdArgs.push_back("-mfloat-abi"); 1511 CmdArgs.push_back("soft"); 1512 } else { 1513 // Floating point operations and argument passing are hard. 1514 assert(FloatABI == ppc::FloatABI::Hard && "Invalid float abi!"); 1515 CmdArgs.push_back("-mfloat-abi"); 1516 CmdArgs.push_back("hard"); 1517 } 1518 1519 if (ABIName) { 1520 CmdArgs.push_back("-target-abi"); 1521 CmdArgs.push_back(ABIName); 1522 } 1523} 1524 1525void Clang::AddSparcTargetArgs(const ArgList &Args, 1526 ArgStringList &CmdArgs) const { 1527 sparc::FloatABI FloatABI = 1528 sparc::getSparcFloatABI(getToolChain().getDriver(), Args); 1529 1530 if (FloatABI == sparc::FloatABI::Soft) { 1531 // Floating point operations and argument passing are soft. 1532 CmdArgs.push_back("-msoft-float"); 1533 CmdArgs.push_back("-mfloat-abi"); 1534 CmdArgs.push_back("soft"); 1535 } else { 1536 // Floating point operations and argument passing are hard. 1537 assert(FloatABI == sparc::FloatABI::Hard && "Invalid float abi!"); 1538 CmdArgs.push_back("-mfloat-abi"); 1539 CmdArgs.push_back("hard"); 1540 } 1541} 1542 1543void Clang::AddSystemZTargetArgs(const ArgList &Args, 1544 ArgStringList &CmdArgs) const { 1545 if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false)) 1546 CmdArgs.push_back("-mbackchain"); 1547} 1548 1549void Clang::AddX86TargetArgs(const ArgList &Args, 1550 ArgStringList &CmdArgs) const { 1551 if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) || 1552 Args.hasArg(options::OPT_mkernel) || 1553 Args.hasArg(options::OPT_fapple_kext)) 1554 CmdArgs.push_back("-disable-red-zone"); 1555 1556 // Default to avoid implicit floating-point for kernel/kext code, but allow 1557 // that to be overridden with -mno-soft-float. 1558 bool NoImplicitFloat = (Args.hasArg(options::OPT_mkernel) || 1559 Args.hasArg(options::OPT_fapple_kext)); 1560 if (Arg *A = Args.getLastArg( 1561 options::OPT_msoft_float, options::OPT_mno_soft_float, 1562 options::OPT_mimplicit_float, options::OPT_mno_implicit_float)) { 1563 const Option &O = A->getOption(); 1564 NoImplicitFloat = (O.matches(options::OPT_mno_implicit_float) || 1565 O.matches(options::OPT_msoft_float)); 1566 } 1567 if (NoImplicitFloat) 1568 CmdArgs.push_back("-no-implicit-float"); 1569 1570 if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) { 1571 StringRef Value = A->getValue(); 1572 if (Value == "intel" || Value == "att") { 1573 CmdArgs.push_back("-mllvm"); 1574 CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value)); 1575 } else { 1576 getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument) 1577 << A->getOption().getName() << Value; 1578 } 1579 } 1580 1581 // Set flags to support MCU ABI. 1582 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) { 1583 CmdArgs.push_back("-mfloat-abi"); 1584 CmdArgs.push_back("soft"); 1585 CmdArgs.push_back("-mstack-alignment=4"); 1586 } 1587} 1588 1589void Clang::AddHexagonTargetArgs(const ArgList &Args, 1590 ArgStringList &CmdArgs) const { 1591 CmdArgs.push_back("-mqdsp6-compat"); 1592 CmdArgs.push_back("-Wreturn-type"); 1593 1594 if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) { 1595 std::string N = llvm::utostr(G.getValue()); 1596 std::string Opt = std::string("-hexagon-small-data-threshold=") + N; 1597 CmdArgs.push_back("-mllvm"); 1598 CmdArgs.push_back(Args.MakeArgString(Opt)); 1599 } 1600 1601 if (!Args.hasArg(options::OPT_fno_short_enums)) 1602 CmdArgs.push_back("-fshort-enums"); 1603 if (Args.getLastArg(options::OPT_mieee_rnd_near)) { 1604 CmdArgs.push_back("-mllvm"); 1605 CmdArgs.push_back("-enable-hexagon-ieee-rnd-near"); 1606 } 1607 CmdArgs.push_back("-mllvm"); 1608 CmdArgs.push_back("-machine-sink-split=0"); 1609} 1610 1611void Clang::AddLanaiTargetArgs(const ArgList &Args, 1612 ArgStringList &CmdArgs) const { 1613 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) { 1614 StringRef CPUName = A->getValue(); 1615 1616 CmdArgs.push_back("-target-cpu"); 1617 CmdArgs.push_back(Args.MakeArgString(CPUName)); 1618 } 1619 if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) { 1620 StringRef Value = A->getValue(); 1621 // Only support mregparm=4 to support old usage. Report error for all other 1622 // cases. 1623 int Mregparm; 1624 if (Value.getAsInteger(10, Mregparm)) { 1625 if (Mregparm != 4) { 1626 getToolChain().getDriver().Diag( 1627 diag::err_drv_unsupported_option_argument) 1628 << A->getOption().getName() << Value; 1629 } 1630 } 1631 } 1632} 1633 1634void Clang::AddWebAssemblyTargetArgs(const ArgList &Args, 1635 ArgStringList &CmdArgs) const { 1636 // Default to "hidden" visibility. 1637 if (!Args.hasArg(options::OPT_fvisibility_EQ, 1638 options::OPT_fvisibility_ms_compat)) { 1639 CmdArgs.push_back("-fvisibility"); 1640 CmdArgs.push_back("hidden"); 1641 } 1642} 1643 1644void Clang::DumpCompilationDatabase(Compilation &C, StringRef Filename, 1645 StringRef Target, const InputInfo &Output, 1646 const InputInfo &Input, const ArgList &Args) const { 1647 // If this is a dry run, do not create the compilation database file. 1648 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) 1649 return; 1650 1651 using llvm::yaml::escape; 1652 const Driver &D = getToolChain().getDriver(); 1653 1654 if (!CompilationDatabase) { 1655 std::error_code EC; 1656 auto File = llvm::make_unique<llvm::raw_fd_ostream>(Filename, EC, llvm::sys::fs::F_Text); 1657 if (EC) { 1658 D.Diag(clang::diag::err_drv_compilationdatabase) << Filename 1659 << EC.message(); 1660 return; 1661 } 1662 CompilationDatabase = std::move(File); 1663 } 1664 auto &CDB = *CompilationDatabase; 1665 SmallString<128> Buf; 1666 if (llvm::sys::fs::current_path(Buf)) 1667 Buf = "."; 1668 CDB << "{ \"directory\": \"" << escape(Buf) << "\""; 1669 CDB << ", \"file\": \"" << escape(Input.getFilename()) << "\""; 1670 CDB << ", \"output\": \"" << escape(Output.getFilename()) << "\""; 1671 CDB << ", \"arguments\": [\"" << escape(D.ClangExecutable) << "\""; 1672 Buf = "-x"; 1673 Buf += types::getTypeName(Input.getType()); 1674 CDB << ", \"" << escape(Buf) << "\""; 1675 if (!D.SysRoot.empty() && !Args.hasArg(options::OPT__sysroot_EQ)) { 1676 Buf = "--sysroot="; 1677 Buf += D.SysRoot; 1678 CDB << ", \"" << escape(Buf) << "\""; 1679 } 1680 CDB << ", \"" << escape(Input.getFilename()) << "\""; 1681 for (auto &A: Args) { 1682 auto &O = A->getOption(); 1683 // Skip language selection, which is positional. 1684 if (O.getID() == options::OPT_x) 1685 continue; 1686 // Skip writing dependency output and the compilation database itself. 1687 if (O.getGroup().isValid() && O.getGroup().getID() == options::OPT_M_Group) 1688 continue; 1689 // Skip inputs. 1690 if (O.getKind() == Option::InputClass) 1691 continue; 1692 // All other arguments are quoted and appended. 1693 ArgStringList ASL; 1694 A->render(Args, ASL); 1695 for (auto &it: ASL) 1696 CDB << ", \"" << escape(it) << "\""; 1697 } 1698 Buf = "--target="; 1699 Buf += Target; 1700 CDB << ", \"" << escape(Buf) << "\"]},\n"; 1701} 1702 1703static void CollectArgsForIntegratedAssembler(Compilation &C, 1704 const ArgList &Args, 1705 ArgStringList &CmdArgs, 1706 const Driver &D) { 1707 if (UseRelaxAll(C, Args)) 1708 CmdArgs.push_back("-mrelax-all"); 1709 1710 // Only default to -mincremental-linker-compatible if we think we are 1711 // targeting the MSVC linker. 1712 bool DefaultIncrementalLinkerCompatible = 1713 C.getDefaultToolChain().getTriple().isWindowsMSVCEnvironment(); 1714 if (Args.hasFlag(options::OPT_mincremental_linker_compatible, 1715 options::OPT_mno_incremental_linker_compatible, 1716 DefaultIncrementalLinkerCompatible)) 1717 CmdArgs.push_back("-mincremental-linker-compatible"); 1718 1719 switch (C.getDefaultToolChain().getArch()) { 1720 case llvm::Triple::arm: 1721 case llvm::Triple::armeb: 1722 case llvm::Triple::thumb: 1723 case llvm::Triple::thumbeb: 1724 if (Arg *A = Args.getLastArg(options::OPT_mimplicit_it_EQ)) { 1725 StringRef Value = A->getValue(); 1726 if (Value == "always" || Value == "never" || Value == "arm" || 1727 Value == "thumb") { 1728 CmdArgs.push_back("-mllvm"); 1729 CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value)); 1730 } else { 1731 D.Diag(diag::err_drv_unsupported_option_argument) 1732 << A->getOption().getName() << Value; 1733 } 1734 } 1735 break; 1736 default: 1737 break; 1738 } 1739 1740 // When passing -I arguments to the assembler we sometimes need to 1741 // unconditionally take the next argument. For example, when parsing 1742 // '-Wa,-I -Wa,foo' we need to accept the -Wa,foo arg after seeing the 1743 // -Wa,-I arg and when parsing '-Wa,-I,foo' we need to accept the 'foo' 1744 // arg after parsing the '-I' arg. 1745 bool TakeNextArg = false; 1746 1747 // When using an integrated assembler, translate -Wa, and -Xassembler 1748 // options. 1749 bool CompressDebugSections = false; 1750 1751 bool UseRelaxRelocations = ENABLE_X86_RELAX_RELOCATIONS; 1752 const char *MipsTargetFeature = nullptr; 1753 for (const Arg *A : 1754 Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) { 1755 A->claim(); 1756 1757 for (StringRef Value : A->getValues()) { 1758 if (TakeNextArg) { 1759 CmdArgs.push_back(Value.data()); 1760 TakeNextArg = false; 1761 continue; 1762 } 1763 1764 if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() && 1765 Value == "-mbig-obj") 1766 continue; // LLVM handles bigobj automatically 1767 1768 switch (C.getDefaultToolChain().getArch()) { 1769 default: 1770 break; 1771 case llvm::Triple::mips: 1772 case llvm::Triple::mipsel: 1773 case llvm::Triple::mips64: 1774 case llvm::Triple::mips64el: 1775 if (Value == "--trap") { 1776 CmdArgs.push_back("-target-feature"); 1777 CmdArgs.push_back("+use-tcc-in-div"); 1778 continue; 1779 } 1780 if (Value == "--break") { 1781 CmdArgs.push_back("-target-feature"); 1782 CmdArgs.push_back("-use-tcc-in-div"); 1783 continue; 1784 } 1785 if (Value.startswith("-msoft-float")) { 1786 CmdArgs.push_back("-target-feature"); 1787 CmdArgs.push_back("+soft-float"); 1788 continue; 1789 } 1790 if (Value.startswith("-mhard-float")) { 1791 CmdArgs.push_back("-target-feature"); 1792 CmdArgs.push_back("-soft-float"); 1793 continue; 1794 } 1795 1796 MipsTargetFeature = llvm::StringSwitch<const char *>(Value) 1797 .Case("-mips1", "+mips1") 1798 .Case("-mips2", "+mips2") 1799 .Case("-mips3", "+mips3") 1800 .Case("-mips4", "+mips4") 1801 .Case("-mips5", "+mips5") 1802 .Case("-mips32", "+mips32") 1803 .Case("-mips32r2", "+mips32r2") 1804 .Case("-mips32r3", "+mips32r3") 1805 .Case("-mips32r5", "+mips32r5") 1806 .Case("-mips32r6", "+mips32r6") 1807 .Case("-mips64", "+mips64") 1808 .Case("-mips64r2", "+mips64r2") 1809 .Case("-mips64r3", "+mips64r3") 1810 .Case("-mips64r5", "+mips64r5") 1811 .Case("-mips64r6", "+mips64r6") 1812 .Default(nullptr); 1813 if (MipsTargetFeature) 1814 continue; 1815 } 1816 1817 if (Value == "-force_cpusubtype_ALL") { 1818 // Do nothing, this is the default and we don't support anything else. 1819 } else if (Value == "-L") { 1820 CmdArgs.push_back("-msave-temp-labels"); 1821 } else if (Value == "--fatal-warnings") { 1822 CmdArgs.push_back("-massembler-fatal-warnings"); 1823 } else if (Value == "--noexecstack") { 1824 CmdArgs.push_back("-mnoexecstack"); 1825 } else if (Value == "-compress-debug-sections" || 1826 Value == "--compress-debug-sections") { 1827 CompressDebugSections = true; 1828 } else if (Value == "-nocompress-debug-sections" || 1829 Value == "--nocompress-debug-sections") { 1830 CompressDebugSections = false; 1831 } else if (Value == "-mrelax-relocations=yes" || 1832 Value == "--mrelax-relocations=yes") { 1833 UseRelaxRelocations = true; 1834 } else if (Value == "-mrelax-relocations=no" || 1835 Value == "--mrelax-relocations=no") { 1836 UseRelaxRelocations = false; 1837 } else if (Value.startswith("-I")) { 1838 CmdArgs.push_back(Value.data()); 1839 // We need to consume the next argument if the current arg is a plain 1840 // -I. The next arg will be the include directory. 1841 if (Value == "-I") 1842 TakeNextArg = true; 1843 } else if (Value.startswith("-gdwarf-")) { 1844 // "-gdwarf-N" options are not cc1as options. 1845 unsigned DwarfVersion = DwarfVersionNum(Value); 1846 if (DwarfVersion == 0) { // Send it onward, and let cc1as complain. 1847 CmdArgs.push_back(Value.data()); 1848 } else { 1849 RenderDebugEnablingArgs(Args, CmdArgs, 1850 codegenoptions::LimitedDebugInfo, 1851 DwarfVersion, llvm::DebuggerKind::Default); 1852 } 1853 } else if (Value.startswith("-mcpu") || Value.startswith("-mfpu") || 1854 Value.startswith("-mhwdiv") || Value.startswith("-march")) { 1855 // Do nothing, we'll validate it later. 1856 } else if (Value == "-defsym") { 1857 if (A->getNumValues() != 2) { 1858 D.Diag(diag::err_drv_defsym_invalid_format) << Value; 1859 break; 1860 } 1861 const char *S = A->getValue(1); 1862 auto Pair = StringRef(S).split('='); 1863 auto Sym = Pair.first; 1864 auto SVal = Pair.second; 1865 1866 if (Sym.empty() || SVal.empty()) { 1867 D.Diag(diag::err_drv_defsym_invalid_format) << S; 1868 break; 1869 } 1870 int64_t IVal; 1871 if (SVal.getAsInteger(0, IVal)) { 1872 D.Diag(diag::err_drv_defsym_invalid_symval) << SVal; 1873 break; 1874 } 1875 CmdArgs.push_back(Value.data()); 1876 TakeNextArg = true; 1877 } else { 1878 D.Diag(diag::err_drv_unsupported_option_argument) 1879 << A->getOption().getName() << Value; 1880 } 1881 } 1882 } 1883 if (CompressDebugSections) { 1884 if (llvm::zlib::isAvailable()) 1885 CmdArgs.push_back("-compress-debug-sections"); 1886 else 1887 D.Diag(diag::warn_debug_compression_unavailable); 1888 } 1889 if (UseRelaxRelocations) 1890 CmdArgs.push_back("--mrelax-relocations"); 1891 if (MipsTargetFeature != nullptr) { 1892 CmdArgs.push_back("-target-feature"); 1893 CmdArgs.push_back(MipsTargetFeature); 1894 } 1895} 1896 1897void Clang::ConstructJob(Compilation &C, const JobAction &JA, 1898 const InputInfo &Output, const InputInfoList &Inputs, 1899 const ArgList &Args, const char *LinkingOutput) const { 1900 const llvm::Triple &Triple = getToolChain().getEffectiveTriple(); 1901 const std::string &TripleStr = Triple.getTriple(); 1902 1903 bool KernelOrKext = 1904 Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext); 1905 const Driver &D = getToolChain().getDriver(); 1906 ArgStringList CmdArgs; 1907 1908 // Check number of inputs for sanity. We need at least one input. 1909 assert(Inputs.size() >= 1 && "Must have at least one input."); 1910 const InputInfo &Input = Inputs[0]; 1911 // CUDA compilation may have multiple inputs (source file + results of 1912 // device-side compilations). OpenMP device jobs also take the host IR as a 1913 // second input. All other jobs are expected to have exactly one 1914 // input. 1915 bool IsCuda = JA.isOffloading(Action::OFK_Cuda); 1916 bool IsOpenMPDevice = JA.isDeviceOffloading(Action::OFK_OpenMP); 1917 assert((IsCuda || (IsOpenMPDevice && Inputs.size() == 2) || 1918 Inputs.size() == 1) && 1919 "Unable to handle multiple inputs."); 1920 1921 bool IsWindowsGNU = getToolChain().getTriple().isWindowsGNUEnvironment(); 1922 bool IsWindowsCygnus = 1923 getToolChain().getTriple().isWindowsCygwinEnvironment(); 1924 bool IsWindowsMSVC = getToolChain().getTriple().isWindowsMSVCEnvironment(); 1925 bool IsPS4CPU = getToolChain().getTriple().isPS4CPU(); 1926 bool IsIAMCU = getToolChain().getTriple().isOSIAMCU(); 1927 1928 // Adjust IsWindowsXYZ for CUDA compilations. Even when compiling in device 1929 // mode (i.e., getToolchain().getTriple() is NVPTX, not Windows), we need to 1930 // pass Windows-specific flags to cc1. 1931 if (IsCuda) { 1932 const llvm::Triple *AuxTriple = getToolChain().getAuxTriple(); 1933 IsWindowsMSVC |= AuxTriple && AuxTriple->isWindowsMSVCEnvironment(); 1934 IsWindowsGNU |= AuxTriple && AuxTriple->isWindowsGNUEnvironment(); 1935 IsWindowsCygnus |= AuxTriple && AuxTriple->isWindowsCygwinEnvironment(); 1936 } 1937 1938 // C++ is not supported for IAMCU. 1939 if (IsIAMCU && types::isCXX(Input.getType())) 1940 D.Diag(diag::err_drv_clang_unsupported) << "C++ for IAMCU"; 1941 1942 // Invoke ourselves in -cc1 mode. 1943 // 1944 // FIXME: Implement custom jobs for internal actions. 1945 CmdArgs.push_back("-cc1"); 1946 1947 // Add the "effective" target triple. 1948 CmdArgs.push_back("-triple"); 1949 CmdArgs.push_back(Args.MakeArgString(TripleStr)); 1950 1951 if (const Arg *MJ = Args.getLastArg(options::OPT_MJ)) { 1952 DumpCompilationDatabase(C, MJ->getValue(), TripleStr, Output, Input, Args); 1953 Args.ClaimAllArgs(options::OPT_MJ); 1954 } 1955 1956 if (IsCuda) { 1957 // We have to pass the triple of the host if compiling for a CUDA device and 1958 // vice-versa. 1959 std::string NormalizedTriple; 1960 if (JA.isDeviceOffloading(Action::OFK_Cuda)) 1961 NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Host>() 1962 ->getTriple() 1963 .normalize(); 1964 else 1965 NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Cuda>() 1966 ->getTriple() 1967 .normalize(); 1968 1969 CmdArgs.push_back("-aux-triple"); 1970 CmdArgs.push_back(Args.MakeArgString(NormalizedTriple)); 1971 } 1972 1973 if (Triple.isOSWindows() && (Triple.getArch() == llvm::Triple::arm || 1974 Triple.getArch() == llvm::Triple::thumb)) { 1975 unsigned Offset = Triple.getArch() == llvm::Triple::arm ? 4 : 6; 1976 unsigned Version; 1977 Triple.getArchName().substr(Offset).getAsInteger(10, Version); 1978 if (Version < 7) 1979 D.Diag(diag::err_target_unsupported_arch) << Triple.getArchName() 1980 << TripleStr; 1981 } 1982 1983 // Push all default warning arguments that are specific to 1984 // the given target. These come before user provided warning options 1985 // are provided. 1986 getToolChain().addClangWarningOptions(CmdArgs); 1987 1988 // Select the appropriate action. 1989 RewriteKind rewriteKind = RK_None; 1990 1991 if (isa<AnalyzeJobAction>(JA)) { 1992 assert(JA.getType() == types::TY_Plist && "Invalid output type."); 1993 CmdArgs.push_back("-analyze"); 1994 } else if (isa<MigrateJobAction>(JA)) { 1995 CmdArgs.push_back("-migrate"); 1996 } else if (isa<PreprocessJobAction>(JA)) { 1997 if (Output.getType() == types::TY_Dependencies) 1998 CmdArgs.push_back("-Eonly"); 1999 else { 2000 CmdArgs.push_back("-E"); 2001 if (Args.hasArg(options::OPT_rewrite_objc) && 2002 !Args.hasArg(options::OPT_g_Group)) 2003 CmdArgs.push_back("-P"); 2004 } 2005 } else if (isa<AssembleJobAction>(JA)) { 2006 CmdArgs.push_back("-emit-obj"); 2007 2008 CollectArgsForIntegratedAssembler(C, Args, CmdArgs, D); 2009 2010 // Also ignore explicit -force_cpusubtype_ALL option. 2011 (void)Args.hasArg(options::OPT_force__cpusubtype__ALL); 2012 } else if (isa<PrecompileJobAction>(JA)) { 2013 // Use PCH if the user requested it. 2014 bool UsePCH = D.CCCUsePCH; 2015 2016 if (JA.getType() == types::TY_Nothing) 2017 CmdArgs.push_back("-fsyntax-only"); 2018 else if (JA.getType() == types::TY_ModuleFile) 2019 CmdArgs.push_back("-emit-module-interface"); 2020 else if (UsePCH) 2021 CmdArgs.push_back("-emit-pch"); 2022 else 2023 CmdArgs.push_back("-emit-pth"); 2024 } else if (isa<VerifyPCHJobAction>(JA)) { 2025 CmdArgs.push_back("-verify-pch"); 2026 } else { 2027 assert((isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) && 2028 "Invalid action for clang tool."); 2029 if (JA.getType() == types::TY_Nothing) { 2030 CmdArgs.push_back("-fsyntax-only"); 2031 } else if (JA.getType() == types::TY_LLVM_IR || 2032 JA.getType() == types::TY_LTO_IR) { 2033 CmdArgs.push_back("-emit-llvm"); 2034 } else if (JA.getType() == types::TY_LLVM_BC || 2035 JA.getType() == types::TY_LTO_BC) { 2036 CmdArgs.push_back("-emit-llvm-bc"); 2037 } else if (JA.getType() == types::TY_PP_Asm) { 2038 CmdArgs.push_back("-S"); 2039 } else if (JA.getType() == types::TY_AST) { 2040 CmdArgs.push_back("-emit-pch"); 2041 } else if (JA.getType() == types::TY_ModuleFile) { 2042 CmdArgs.push_back("-module-file-info"); 2043 } else if (JA.getType() == types::TY_RewrittenObjC) { 2044 CmdArgs.push_back("-rewrite-objc"); 2045 rewriteKind = RK_NonFragile; 2046 } else if (JA.getType() == types::TY_RewrittenLegacyObjC) { 2047 CmdArgs.push_back("-rewrite-objc"); 2048 rewriteKind = RK_Fragile; 2049 } else { 2050 assert(JA.getType() == types::TY_PP_Asm && "Unexpected output type!"); 2051 } 2052 2053 // Preserve use-list order by default when emitting bitcode, so that 2054 // loading the bitcode up in 'opt' or 'llc' and running passes gives the 2055 // same result as running passes here. For LTO, we don't need to preserve 2056 // the use-list order, since serialization to bitcode is part of the flow. 2057 if (JA.getType() == types::TY_LLVM_BC) 2058 CmdArgs.push_back("-emit-llvm-uselists"); 2059 2060 if (D.isUsingLTO()) { 2061 Args.AddLastArg(CmdArgs, options::OPT_flto, options::OPT_flto_EQ); 2062 2063 // The Darwin linker currently uses the legacy LTO API, which does not 2064 // support LTO unit features (CFI, whole program vtable opt) under 2065 // ThinLTO. 2066 if (!getToolChain().getTriple().isOSDarwin() || 2067 D.getLTOMode() == LTOK_Full) 2068 CmdArgs.push_back("-flto-unit"); 2069 } 2070 } 2071 2072 if (const Arg *A = Args.getLastArg(options::OPT_fthinlto_index_EQ)) { 2073 if (!types::isLLVMIR(Input.getType())) 2074 D.Diag(diag::err_drv_argument_only_allowed_with) << A->getAsString(Args) 2075 << "-x ir"; 2076 Args.AddLastArg(CmdArgs, options::OPT_fthinlto_index_EQ); 2077 } 2078 2079 // Embed-bitcode option. 2080 if (C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO() && 2081 (isa<BackendJobAction>(JA) || isa<AssembleJobAction>(JA))) { 2082 // Add flags implied by -fembed-bitcode. 2083 Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ); 2084 // Disable all llvm IR level optimizations. 2085 CmdArgs.push_back("-disable-llvm-passes"); 2086 } 2087 if (C.getDriver().embedBitcodeMarkerOnly() && !C.getDriver().isUsingLTO()) 2088 CmdArgs.push_back("-fembed-bitcode=marker"); 2089 2090 // We normally speed up the clang process a bit by skipping destructors at 2091 // exit, but when we're generating diagnostics we can rely on some of the 2092 // cleanup. 2093 if (!C.isForDiagnostics()) 2094 CmdArgs.push_back("-disable-free"); 2095 2096// Disable the verification pass in -asserts builds. 2097#ifdef NDEBUG 2098 CmdArgs.push_back("-disable-llvm-verifier"); 2099 // Discard LLVM value names in -asserts builds. 2100 CmdArgs.push_back("-discard-value-names"); 2101#endif 2102 2103 // Set the main file name, so that debug info works even with 2104 // -save-temps. 2105 CmdArgs.push_back("-main-file-name"); 2106 CmdArgs.push_back(getBaseInputName(Args, Input)); 2107 2108 // Some flags which affect the language (via preprocessor 2109 // defines). 2110 if (Args.hasArg(options::OPT_static)) 2111 CmdArgs.push_back("-static-define"); 2112 2113 if (isa<AnalyzeJobAction>(JA)) { 2114 // Enable region store model by default. 2115 CmdArgs.push_back("-analyzer-store=region"); 2116 2117 // Treat blocks as analysis entry points. 2118 CmdArgs.push_back("-analyzer-opt-analyze-nested-blocks"); 2119 2120 CmdArgs.push_back("-analyzer-eagerly-assume"); 2121 2122 // Add default argument set. 2123 if (!Args.hasArg(options::OPT__analyzer_no_default_checks)) { 2124 CmdArgs.push_back("-analyzer-checker=core"); 2125 CmdArgs.push_back("-analyzer-checker=apiModeling"); 2126 2127 if (!IsWindowsMSVC) { 2128 CmdArgs.push_back("-analyzer-checker=unix"); 2129 } else { 2130 // Enable "unix" checkers that also work on Windows. 2131 CmdArgs.push_back("-analyzer-checker=unix.API"); 2132 CmdArgs.push_back("-analyzer-checker=unix.Malloc"); 2133 CmdArgs.push_back("-analyzer-checker=unix.MallocSizeof"); 2134 CmdArgs.push_back("-analyzer-checker=unix.MismatchedDeallocator"); 2135 CmdArgs.push_back("-analyzer-checker=unix.cstring.BadSizeArg"); 2136 CmdArgs.push_back("-analyzer-checker=unix.cstring.NullArg"); 2137 } 2138 2139 // Disable some unix checkers for PS4. 2140 if (IsPS4CPU) { 2141 CmdArgs.push_back("-analyzer-disable-checker=unix.API"); 2142 CmdArgs.push_back("-analyzer-disable-checker=unix.Vfork"); 2143 } 2144 2145 if (getToolChain().getTriple().getVendor() == llvm::Triple::Apple) 2146 CmdArgs.push_back("-analyzer-checker=osx"); 2147 2148 CmdArgs.push_back("-analyzer-checker=deadcode"); 2149 2150 if (types::isCXX(Input.getType())) 2151 CmdArgs.push_back("-analyzer-checker=cplusplus"); 2152 2153 if (!IsPS4CPU) { 2154 CmdArgs.push_back( 2155 "-analyzer-checker=security.insecureAPI.UncheckedReturn"); 2156 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.getpw"); 2157 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.gets"); 2158 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mktemp"); 2159 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mkstemp"); 2160 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.vfork"); 2161 } 2162 2163 // Default nullability checks. 2164 CmdArgs.push_back("-analyzer-checker=nullability.NullPassedToNonnull"); 2165 CmdArgs.push_back( 2166 "-analyzer-checker=nullability.NullReturnedFromNonnull"); 2167 } 2168 2169 // Set the output format. The default is plist, for (lame) historical 2170 // reasons. 2171 CmdArgs.push_back("-analyzer-output"); 2172 if (Arg *A = Args.getLastArg(options::OPT__analyzer_output)) 2173 CmdArgs.push_back(A->getValue()); 2174 else 2175 CmdArgs.push_back("plist"); 2176 2177 // Disable the presentation of standard compiler warnings when 2178 // using --analyze. We only want to show static analyzer diagnostics 2179 // or frontend errors. 2180 CmdArgs.push_back("-w"); 2181 2182 // Add -Xanalyzer arguments when running as analyzer. 2183 Args.AddAllArgValues(CmdArgs, options::OPT_Xanalyzer); 2184 } 2185 2186 CheckCodeGenerationOptions(D, Args); 2187 2188 llvm::Reloc::Model RelocationModel; 2189 unsigned PICLevel; 2190 bool IsPIE; 2191 std::tie(RelocationModel, PICLevel, IsPIE) = 2192 ParsePICArgs(getToolChain(), Args); 2193 2194 const char *RMName = RelocationModelName(RelocationModel); 2195 2196 if ((RelocationModel == llvm::Reloc::ROPI || 2197 RelocationModel == llvm::Reloc::ROPI_RWPI) && 2198 types::isCXX(Input.getType()) && 2199 !Args.hasArg(options::OPT_fallow_unsupported)) 2200 D.Diag(diag::err_drv_ropi_incompatible_with_cxx); 2201 2202 if (RMName) { 2203 CmdArgs.push_back("-mrelocation-model"); 2204 CmdArgs.push_back(RMName); 2205 } 2206 if (PICLevel > 0) { 2207 CmdArgs.push_back("-pic-level"); 2208 CmdArgs.push_back(PICLevel == 1 ? "1" : "2"); 2209 if (IsPIE) 2210 CmdArgs.push_back("-pic-is-pie"); 2211 } 2212 2213 if (Arg *A = Args.getLastArg(options::OPT_meabi)) { 2214 CmdArgs.push_back("-meabi"); 2215 CmdArgs.push_back(A->getValue()); 2216 } 2217 2218 CmdArgs.push_back("-mthread-model"); 2219 if (Arg *A = Args.getLastArg(options::OPT_mthread_model)) 2220 CmdArgs.push_back(A->getValue()); 2221 else 2222 CmdArgs.push_back(Args.MakeArgString(getToolChain().getThreadModel())); 2223 2224 Args.AddLastArg(CmdArgs, options::OPT_fveclib); 2225 2226 if (!Args.hasFlag(options::OPT_fmerge_all_constants, 2227 options::OPT_fno_merge_all_constants)) 2228 CmdArgs.push_back("-fno-merge-all-constants"); 2229 2230 // LLVM Code Generator Options. 2231 2232 if (Args.hasArg(options::OPT_frewrite_map_file) || 2233 Args.hasArg(options::OPT_frewrite_map_file_EQ)) { 2234 for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file, 2235 options::OPT_frewrite_map_file_EQ)) { 2236 StringRef Map = A->getValue(); 2237 if (!llvm::sys::fs::exists(Map)) { 2238 D.Diag(diag::err_drv_no_such_file) << Map; 2239 } else { 2240 CmdArgs.push_back("-frewrite-map-file"); 2241 CmdArgs.push_back(A->getValue()); 2242 A->claim(); 2243 } 2244 } 2245 } 2246 2247 if (Arg *A = Args.getLastArg(options::OPT_Wframe_larger_than_EQ)) { 2248 StringRef v = A->getValue(); 2249 CmdArgs.push_back("-mllvm"); 2250 CmdArgs.push_back(Args.MakeArgString("-warn-stack-size=" + v)); 2251 A->claim(); 2252 } 2253 2254 if (!Args.hasFlag(options::OPT_fjump_tables, options::OPT_fno_jump_tables, 2255 true)) 2256 CmdArgs.push_back("-fno-jump-tables"); 2257 2258 if (!Args.hasFlag(options::OPT_fpreserve_as_comments, 2259 options::OPT_fno_preserve_as_comments, true)) 2260 CmdArgs.push_back("-fno-preserve-as-comments"); 2261 2262 if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) { 2263 CmdArgs.push_back("-mregparm"); 2264 CmdArgs.push_back(A->getValue()); 2265 } 2266 2267 if (Arg *A = Args.getLastArg(options::OPT_fpcc_struct_return, 2268 options::OPT_freg_struct_return)) { 2269 if (getToolChain().getArch() != llvm::Triple::x86) { 2270 D.Diag(diag::err_drv_unsupported_opt_for_target) 2271 << A->getSpelling() << getToolChain().getTriple().str(); 2272 } else if (A->getOption().matches(options::OPT_fpcc_struct_return)) { 2273 CmdArgs.push_back("-fpcc-struct-return"); 2274 } else { 2275 assert(A->getOption().matches(options::OPT_freg_struct_return)); 2276 CmdArgs.push_back("-freg-struct-return"); 2277 } 2278 } 2279 2280 if (Args.hasFlag(options::OPT_mrtd, options::OPT_mno_rtd, false)) 2281 CmdArgs.push_back("-fdefault-calling-conv=stdcall"); 2282 2283 if (shouldUseFramePointer(Args, getToolChain().getTriple())) 2284 CmdArgs.push_back("-mdisable-fp-elim"); 2285 if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss, 2286 options::OPT_fno_zero_initialized_in_bss)) 2287 CmdArgs.push_back("-mno-zero-initialized-in-bss"); 2288 2289 bool OFastEnabled = isOptimizationLevelFast(Args); 2290 // If -Ofast is the optimization level, then -fstrict-aliasing should be 2291 // enabled. This alias option is being used to simplify the hasFlag logic. 2292 OptSpecifier StrictAliasingAliasOption = 2293 OFastEnabled ? options::OPT_Ofast : options::OPT_fstrict_aliasing; 2294 // We turn strict aliasing off by default if we're in CL mode, since MSVC 2295 // doesn't do any TBAA. 2296 bool TBAAOnByDefault = !getToolChain().getDriver().IsCLMode(); 2297 if (!Args.hasFlag(options::OPT_fstrict_aliasing, StrictAliasingAliasOption, 2298 options::OPT_fno_strict_aliasing, TBAAOnByDefault)) 2299 CmdArgs.push_back("-relaxed-aliasing"); 2300 if (!Args.hasFlag(options::OPT_fstruct_path_tbaa, 2301 options::OPT_fno_struct_path_tbaa)) 2302 CmdArgs.push_back("-no-struct-path-tbaa"); 2303 if (Args.hasFlag(options::OPT_fstrict_enums, options::OPT_fno_strict_enums, 2304 false)) 2305 CmdArgs.push_back("-fstrict-enums"); 2306 if (!Args.hasFlag(options::OPT_fstrict_return, options::OPT_fno_strict_return, 2307 true)) 2308 CmdArgs.push_back("-fno-strict-return"); 2309 if (Args.hasFlag(options::OPT_fallow_editor_placeholders, 2310 options::OPT_fno_allow_editor_placeholders, false)) 2311 CmdArgs.push_back("-fallow-editor-placeholders"); 2312 if (Args.hasFlag(options::OPT_fstrict_vtable_pointers, 2313 options::OPT_fno_strict_vtable_pointers, 2314 false)) 2315 CmdArgs.push_back("-fstrict-vtable-pointers"); 2316 if (!Args.hasFlag(options::OPT_foptimize_sibling_calls, 2317 options::OPT_fno_optimize_sibling_calls)) 2318 CmdArgs.push_back("-mdisable-tail-calls"); 2319 2320 // Handle segmented stacks. 2321 if (Args.hasArg(options::OPT_fsplit_stack)) 2322 CmdArgs.push_back("-split-stacks"); 2323 2324 // Handle various floating point optimization flags, mapping them to the 2325 // appropriate LLVM code generation flags. This is complicated by several 2326 // "umbrella" flags, so we do this by stepping through the flags incrementally 2327 // adjusting what we think is enabled/disabled, then at the end settting the 2328 // LLVM flags based on the final state. 2329 bool HonorInfs = true; 2330 bool HonorNans = true; 2331 // -fmath-errno is the default on some platforms, e.g. BSD-derived OSes. 2332 bool MathErrno = getToolChain().IsMathErrnoDefault(); 2333 bool AssociativeMath = false; 2334 bool ReciprocalMath = false; 2335 bool SignedZeros = true; 2336 bool TrappingMath = true; 2337 StringRef DenormalFpMath = ""; 2338 StringRef FpContract = ""; 2339 2340 for (Arg *A : Args) { 2341 switch (A->getOption().getID()) { 2342 // If this isn't an FP option skip the claim below 2343 default: 2344 continue; 2345 2346 // Options controlling individual features 2347 case options::OPT_fhonor_infinities: HonorInfs = true; break; 2348 case options::OPT_fno_honor_infinities: HonorInfs = false; break; 2349 case options::OPT_fhonor_nans: HonorNans = true; break; 2350 case options::OPT_fno_honor_nans: HonorNans = false; break; 2351 case options::OPT_fmath_errno: MathErrno = true; break; 2352 case options::OPT_fno_math_errno: MathErrno = false; break; 2353 case options::OPT_fassociative_math: AssociativeMath = true; break; 2354 case options::OPT_fno_associative_math: AssociativeMath = false; break; 2355 case options::OPT_freciprocal_math: ReciprocalMath = true; break; 2356 case options::OPT_fno_reciprocal_math: ReciprocalMath = false; break; 2357 case options::OPT_fsigned_zeros: SignedZeros = true; break; 2358 case options::OPT_fno_signed_zeros: SignedZeros = false; break; 2359 case options::OPT_ftrapping_math: TrappingMath = true; break; 2360 case options::OPT_fno_trapping_math: TrappingMath = false; break; 2361 2362 case options::OPT_fdenormal_fp_math_EQ: 2363 DenormalFpMath = A->getValue(); 2364 break; 2365 2366 // Validate and pass through -fp-contract option. 2367 case options::OPT_ffp_contract: { 2368 StringRef Val = A->getValue(); 2369 if (Val == "fast" || Val == "on" || Val == "off") { 2370 FpContract = Val; 2371 } else { 2372 D.Diag(diag::err_drv_unsupported_option_argument) 2373 << A->getOption().getName() << Val; 2374 } 2375 break; 2376 } 2377 2378 case options::OPT_ffinite_math_only: 2379 HonorInfs = false; 2380 HonorNans = false; 2381 break; 2382 case options::OPT_fno_finite_math_only: 2383 HonorInfs = true; 2384 HonorNans = true; 2385 break; 2386 2387 case options::OPT_funsafe_math_optimizations: 2388 AssociativeMath = true; 2389 ReciprocalMath = true; 2390 SignedZeros = false; 2391 TrappingMath = false; 2392 break; 2393 case options::OPT_fno_unsafe_math_optimizations: 2394 AssociativeMath = false; 2395 ReciprocalMath = false; 2396 SignedZeros = true; 2397 TrappingMath = true; 2398 // -fno_unsafe_math_optimizations restores default denormal handling 2399 DenormalFpMath = ""; 2400 break; 2401 2402 case options::OPT_Ofast: 2403 // If -Ofast is the optimization level, then -ffast-math should be enabled 2404 if (!OFastEnabled) 2405 continue; 2406 LLVM_FALLTHROUGH; 2407 case options::OPT_ffast_math: 2408 HonorInfs = false; 2409 HonorNans = false; 2410 MathErrno = false; 2411 AssociativeMath = true; 2412 ReciprocalMath = true; 2413 SignedZeros = false; 2414 TrappingMath = false; 2415 // If fast-math is set then set the fp-contract mode to fast. 2416 FpContract = "fast"; 2417 break; 2418 case options::OPT_fno_fast_math: 2419 HonorInfs = true; 2420 HonorNans = true; 2421 // Turning on -ffast-math (with either flag) removes the need for 2422 // MathErrno. However, turning *off* -ffast-math merely restores the 2423 // toolchain default (which may be false). 2424 MathErrno = getToolChain().IsMathErrnoDefault(); 2425 AssociativeMath = false; 2426 ReciprocalMath = false; 2427 SignedZeros = true; 2428 TrappingMath = true; 2429 // -fno_fast_math restores default denormal and fpcontract handling 2430 DenormalFpMath = ""; 2431 FpContract = ""; 2432 break; 2433 } 2434 // If we handled this option claim it 2435 A->claim(); 2436 } 2437 2438 if (!HonorInfs) 2439 CmdArgs.push_back("-menable-no-infs"); 2440 2441 if (!HonorNans) 2442 CmdArgs.push_back("-menable-no-nans"); 2443 2444 if (MathErrno) 2445 CmdArgs.push_back("-fmath-errno"); 2446 2447 if (!MathErrno && AssociativeMath && ReciprocalMath && !SignedZeros && 2448 !TrappingMath) 2449 CmdArgs.push_back("-menable-unsafe-fp-math"); 2450 2451 if (!SignedZeros) 2452 CmdArgs.push_back("-fno-signed-zeros"); 2453 2454 if (ReciprocalMath) 2455 CmdArgs.push_back("-freciprocal-math"); 2456 2457 if (!TrappingMath) 2458 CmdArgs.push_back("-fno-trapping-math"); 2459 2460 if (!DenormalFpMath.empty()) 2461 CmdArgs.push_back(Args.MakeArgString("-fdenormal-fp-math="+DenormalFpMath)); 2462 2463 if (!FpContract.empty()) 2464 CmdArgs.push_back(Args.MakeArgString("-ffp-contract="+FpContract)); 2465 2466 ParseMRecip(getToolChain().getDriver(), Args, CmdArgs); 2467 2468 // -ffast-math enables the __FAST_MATH__ preprocessor macro, but check for the 2469 // individual features enabled by -ffast-math instead of the option itself as 2470 // that's consistent with gcc's behaviour. 2471 if (!HonorInfs && !HonorNans && !MathErrno && AssociativeMath && 2472 ReciprocalMath && !SignedZeros && !TrappingMath) 2473 CmdArgs.push_back("-ffast-math"); 2474 2475 // Handle __FINITE_MATH_ONLY__ similarly. 2476 if (!HonorInfs && !HonorNans) 2477 CmdArgs.push_back("-ffinite-math-only"); 2478 2479 // Decide whether to use verbose asm. Verbose assembly is the default on 2480 // toolchains which have the integrated assembler on by default. 2481 bool IsIntegratedAssemblerDefault = 2482 getToolChain().IsIntegratedAssemblerDefault(); 2483 if (Args.hasFlag(options::OPT_fverbose_asm, options::OPT_fno_verbose_asm, 2484 IsIntegratedAssemblerDefault) || 2485 Args.hasArg(options::OPT_dA)) 2486 CmdArgs.push_back("-masm-verbose"); 2487 2488 if (!Args.hasFlag(options::OPT_fintegrated_as, options::OPT_fno_integrated_as, 2489 IsIntegratedAssemblerDefault)) 2490 CmdArgs.push_back("-no-integrated-as"); 2491 2492 if (Args.hasArg(options::OPT_fdebug_pass_structure)) { 2493 CmdArgs.push_back("-mdebug-pass"); 2494 CmdArgs.push_back("Structure"); 2495 } 2496 if (Args.hasArg(options::OPT_fdebug_pass_arguments)) { 2497 CmdArgs.push_back("-mdebug-pass"); 2498 CmdArgs.push_back("Arguments"); 2499 } 2500 2501 // Enable -mconstructor-aliases except on darwin, where we have to work around 2502 // a linker bug (see <rdar://problem/7651567>), and CUDA device code, where 2503 // aliases aren't supported. 2504 if (!getToolChain().getTriple().isOSDarwin() && 2505 !getToolChain().getTriple().isNVPTX()) 2506 CmdArgs.push_back("-mconstructor-aliases"); 2507 2508 // Darwin's kernel doesn't support guard variables; just die if we 2509 // try to use them. 2510 if (KernelOrKext && getToolChain().getTriple().isOSDarwin()) 2511 CmdArgs.push_back("-fforbid-guard-variables"); 2512 2513 if (Args.hasFlag(options::OPT_mms_bitfields, options::OPT_mno_ms_bitfields, 2514 false)) { 2515 CmdArgs.push_back("-mms-bitfields"); 2516 } 2517 2518 if (Args.hasFlag(options::OPT_mpie_copy_relocations, 2519 options::OPT_mno_pie_copy_relocations, 2520 false)) { 2521 CmdArgs.push_back("-mpie-copy-relocations"); 2522 } 2523 2524 // This is a coarse approximation of what llvm-gcc actually does, both 2525 // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more 2526 // complicated ways. 2527 bool AsynchronousUnwindTables = 2528 Args.hasFlag(options::OPT_fasynchronous_unwind_tables, 2529 options::OPT_fno_asynchronous_unwind_tables, 2530 (getToolChain().IsUnwindTablesDefault() || 2531 getToolChain().getSanitizerArgs().needsUnwindTables()) && 2532 !KernelOrKext); 2533 if (Args.hasFlag(options::OPT_funwind_tables, options::OPT_fno_unwind_tables, 2534 AsynchronousUnwindTables)) 2535 CmdArgs.push_back("-munwind-tables"); 2536 2537 getToolChain().addClangTargetOptions(Args, CmdArgs); 2538 2539 if (Arg *A = Args.getLastArg(options::OPT_flimited_precision_EQ)) { 2540 CmdArgs.push_back("-mlimit-float-precision"); 2541 CmdArgs.push_back(A->getValue()); 2542 } 2543 2544 // FIXME: Handle -mtune=. 2545 (void)Args.hasArg(options::OPT_mtune_EQ); 2546 2547 if (Arg *A = Args.getLastArg(options::OPT_mcmodel_EQ)) { 2548 CmdArgs.push_back("-mcode-model"); 2549 CmdArgs.push_back(A->getValue()); 2550 } 2551 2552 // Add the target cpu 2553 std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false); 2554 if (!CPU.empty()) { 2555 CmdArgs.push_back("-target-cpu"); 2556 CmdArgs.push_back(Args.MakeArgString(CPU)); 2557 } 2558 2559 if (const Arg *A = Args.getLastArg(options::OPT_mfpmath_EQ)) { 2560 CmdArgs.push_back("-mfpmath"); 2561 CmdArgs.push_back(A->getValue()); 2562 } 2563 2564 // Add the target features 2565 getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, false); 2566 2567 // Add target specific flags. 2568 switch (getToolChain().getArch()) { 2569 default: 2570 break; 2571 2572 case llvm::Triple::arm: 2573 case llvm::Triple::armeb: 2574 case llvm::Triple::thumb: 2575 case llvm::Triple::thumbeb: 2576 // Use the effective triple, which takes into account the deployment target. 2577 AddARMTargetArgs(Triple, Args, CmdArgs, KernelOrKext); 2578 break; 2579 2580 case llvm::Triple::aarch64: 2581 case llvm::Triple::aarch64_be: 2582 AddAArch64TargetArgs(Args, CmdArgs); 2583 break; 2584 2585 case llvm::Triple::mips: 2586 case llvm::Triple::mipsel: 2587 case llvm::Triple::mips64: 2588 case llvm::Triple::mips64el: 2589 AddMIPSTargetArgs(Args, CmdArgs); 2590 break; 2591 2592 case llvm::Triple::ppc: 2593 case llvm::Triple::ppc64: 2594 case llvm::Triple::ppc64le: 2595 AddPPCTargetArgs(Args, CmdArgs); 2596 break; 2597 2598 case llvm::Triple::sparc: 2599 case llvm::Triple::sparcel: 2600 case llvm::Triple::sparcv9: 2601 AddSparcTargetArgs(Args, CmdArgs); 2602 break; 2603 2604 case llvm::Triple::systemz: 2605 AddSystemZTargetArgs(Args, CmdArgs); 2606 break; 2607 2608 case llvm::Triple::x86: 2609 case llvm::Triple::x86_64: 2610 AddX86TargetArgs(Args, CmdArgs); 2611 break; 2612 2613 case llvm::Triple::lanai: 2614 AddLanaiTargetArgs(Args, CmdArgs); 2615 break; 2616 2617 case llvm::Triple::hexagon: 2618 AddHexagonTargetArgs(Args, CmdArgs); 2619 break; 2620 2621 case llvm::Triple::wasm32: 2622 case llvm::Triple::wasm64: 2623 AddWebAssemblyTargetArgs(Args, CmdArgs); 2624 break; 2625 } 2626 2627 // The 'g' groups options involve a somewhat intricate sequence of decisions 2628 // about what to pass from the driver to the frontend, but by the time they 2629 // reach cc1 they've been factored into three well-defined orthogonal choices: 2630 // * what level of debug info to generate 2631 // * what dwarf version to write 2632 // * what debugger tuning to use 2633 // This avoids having to monkey around further in cc1 other than to disable 2634 // codeview if not running in a Windows environment. Perhaps even that 2635 // decision should be made in the driver as well though. 2636 unsigned DwarfVersion = 0; 2637 llvm::DebuggerKind DebuggerTuning = getToolChain().getDefaultDebuggerTuning(); 2638 // These two are potentially updated by AddClangCLArgs. 2639 codegenoptions::DebugInfoKind DebugInfoKind = codegenoptions::NoDebugInfo; 2640 bool EmitCodeView = false; 2641 2642 // Add clang-cl arguments. 2643 types::ID InputType = Input.getType(); 2644 if (getToolChain().getDriver().IsCLMode()) 2645 AddClangCLArgs(Args, InputType, CmdArgs, &DebugInfoKind, &EmitCodeView); 2646 2647 // Pass the linker version in use. 2648 if (Arg *A = Args.getLastArg(options::OPT_mlinker_version_EQ)) { 2649 CmdArgs.push_back("-target-linker-version"); 2650 CmdArgs.push_back(A->getValue()); 2651 } 2652 2653 if (!shouldUseLeafFramePointer(Args, getToolChain().getTriple())) 2654 CmdArgs.push_back("-momit-leaf-frame-pointer"); 2655 2656 // Explicitly error on some things we know we don't support and can't just 2657 // ignore. 2658 if (!Args.hasArg(options::OPT_fallow_unsupported)) { 2659 Arg *Unsupported; 2660 if (types::isCXX(InputType) && getToolChain().getTriple().isOSDarwin() && 2661 getToolChain().getArch() == llvm::Triple::x86) { 2662 if ((Unsupported = Args.getLastArg(options::OPT_fapple_kext)) || 2663 (Unsupported = Args.getLastArg(options::OPT_mkernel))) 2664 D.Diag(diag::err_drv_clang_unsupported_opt_cxx_darwin_i386) 2665 << Unsupported->getOption().getName(); 2666 } 2667 // The faltivec option has been superseded by the maltivec option. 2668 if ((Unsupported = Args.getLastArg(options::OPT_faltivec))) 2669 D.Diag(diag::err_drv_clang_unsupported_opt_faltivec) 2670 << Unsupported->getOption().getName() 2671 << "please use -maltivec and include altivec.h explicitly"; 2672 if ((Unsupported = Args.getLastArg(options::OPT_fno_altivec))) 2673 D.Diag(diag::err_drv_clang_unsupported_opt_faltivec) 2674 << Unsupported->getOption().getName() << "please use -mno-altivec"; 2675 } 2676 2677 Args.AddAllArgs(CmdArgs, options::OPT_v); 2678 Args.AddLastArg(CmdArgs, options::OPT_H); 2679 if (D.CCPrintHeaders && !D.CCGenDiagnostics) { 2680 CmdArgs.push_back("-header-include-file"); 2681 CmdArgs.push_back(D.CCPrintHeadersFilename ? D.CCPrintHeadersFilename 2682 : "-"); 2683 } 2684 Args.AddLastArg(CmdArgs, options::OPT_P); 2685 Args.AddLastArg(CmdArgs, options::OPT_print_ivar_layout); 2686 2687 if (D.CCLogDiagnostics && !D.CCGenDiagnostics) { 2688 CmdArgs.push_back("-diagnostic-log-file"); 2689 CmdArgs.push_back(D.CCLogDiagnosticsFilename ? D.CCLogDiagnosticsFilename 2690 : "-"); 2691 } 2692 2693 bool splitDwarfInlining = 2694 Args.hasFlag(options::OPT_fsplit_dwarf_inlining, 2695 options::OPT_fno_split_dwarf_inlining, true); 2696 2697 Args.ClaimAllArgs(options::OPT_g_Group); 2698 Arg *SplitDwarfArg = Args.getLastArg(options::OPT_gsplit_dwarf); 2699 if (Arg *A = Args.getLastArg(options::OPT_g_Group)) { 2700 // If the last option explicitly specified a debug-info level, use it. 2701 if (A->getOption().matches(options::OPT_gN_Group)) { 2702 DebugInfoKind = DebugLevelToInfoKind(*A); 2703 // If you say "-gsplit-dwarf -gline-tables-only", -gsplit-dwarf loses. 2704 // But -gsplit-dwarf is not a g_group option, hence we have to check the 2705 // order explicitly. (If -gsplit-dwarf wins, we fix DebugInfoKind later.) 2706 // This gets a bit more complicated if you've disabled inline info in the 2707 // skeleton CUs (splitDwarfInlining) - then there's value in composing 2708 // split-dwarf and line-tables-only, so let those compose naturally in 2709 // that case. 2710 // And if you just turned off debug info, (-gsplit-dwarf -g0) - do that. 2711 if (SplitDwarfArg) { 2712 if (A->getIndex() > SplitDwarfArg->getIndex()) { 2713 if (DebugInfoKind == codegenoptions::NoDebugInfo || 2714 (DebugInfoKind == codegenoptions::DebugLineTablesOnly && 2715 splitDwarfInlining)) 2716 SplitDwarfArg = nullptr; 2717 } else if (splitDwarfInlining) 2718 DebugInfoKind = codegenoptions::NoDebugInfo; 2719 } 2720 } else 2721 // For any other 'g' option, use Limited. 2722 DebugInfoKind = codegenoptions::LimitedDebugInfo; 2723 } 2724 2725 // If a debugger tuning argument appeared, remember it. 2726 if (Arg *A = Args.getLastArg(options::OPT_gTune_Group, 2727 options::OPT_ggdbN_Group)) { 2728 if (A->getOption().matches(options::OPT_glldb)) 2729 DebuggerTuning = llvm::DebuggerKind::LLDB; 2730 else if (A->getOption().matches(options::OPT_gsce)) 2731 DebuggerTuning = llvm::DebuggerKind::SCE; 2732 else 2733 DebuggerTuning = llvm::DebuggerKind::GDB; 2734 } 2735 2736 // If a -gdwarf argument appeared, remember it. 2737 if (Arg *A = Args.getLastArg(options::OPT_gdwarf_2, options::OPT_gdwarf_3, 2738 options::OPT_gdwarf_4, options::OPT_gdwarf_5)) 2739 DwarfVersion = DwarfVersionNum(A->getSpelling()); 2740 2741 // Forward -gcodeview. EmitCodeView might have been set by CL-compatibility 2742 // argument parsing. 2743 if (Args.hasArg(options::OPT_gcodeview) || EmitCodeView) { 2744 // DwarfVersion remains at 0 if no explicit choice was made. 2745 CmdArgs.push_back("-gcodeview"); 2746 } else if (DwarfVersion == 0 && 2747 DebugInfoKind != codegenoptions::NoDebugInfo) { 2748 DwarfVersion = getToolChain().GetDefaultDwarfVersion(); 2749 } 2750 2751 // We ignore flag -gstrict-dwarf for now. 2752 // And we handle flag -grecord-gcc-switches later with DwarfDebugFlags. 2753 Args.ClaimAllArgs(options::OPT_g_flags_Group); 2754 2755 // Column info is included by default for everything except PS4 and CodeView. 2756 // Clang doesn't track end columns, just starting columns, which, in theory, 2757 // is fine for CodeView (and PDB). In practice, however, the Microsoft 2758 // debuggers don't handle missing end columns well, so it's better not to 2759 // include any column info. 2760 if (Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info, 2761 /*Default=*/ !IsPS4CPU && !(IsWindowsMSVC && EmitCodeView))) 2762 CmdArgs.push_back("-dwarf-column-info"); 2763 2764 // FIXME: Move backend command line options to the module. 2765 // If -gline-tables-only is the last option it wins. 2766 if (DebugInfoKind != codegenoptions::DebugLineTablesOnly && 2767 Args.hasArg(options::OPT_gmodules)) { 2768 DebugInfoKind = codegenoptions::LimitedDebugInfo; 2769 CmdArgs.push_back("-dwarf-ext-refs"); 2770 CmdArgs.push_back("-fmodule-format=obj"); 2771 } 2772 2773 // -gsplit-dwarf should turn on -g and enable the backend dwarf 2774 // splitting and extraction. 2775 // FIXME: Currently only works on Linux. 2776 if (getToolChain().getTriple().isOSLinux()) { 2777 if (!splitDwarfInlining) 2778 CmdArgs.push_back("-fno-split-dwarf-inlining"); 2779 if (SplitDwarfArg) { 2780 if (DebugInfoKind == codegenoptions::NoDebugInfo) 2781 DebugInfoKind = codegenoptions::LimitedDebugInfo; 2782 CmdArgs.push_back("-enable-split-dwarf"); 2783 } 2784 } 2785 2786 // After we've dealt with all combinations of things that could 2787 // make DebugInfoKind be other than None or DebugLineTablesOnly, 2788 // figure out if we need to "upgrade" it to standalone debug info. 2789 // We parse these two '-f' options whether or not they will be used, 2790 // to claim them even if you wrote "-fstandalone-debug -gline-tables-only" 2791 bool NeedFullDebug = Args.hasFlag(options::OPT_fstandalone_debug, 2792 options::OPT_fno_standalone_debug, 2793 getToolChain().GetDefaultStandaloneDebug()); 2794 if (DebugInfoKind == codegenoptions::LimitedDebugInfo && NeedFullDebug) 2795 DebugInfoKind = codegenoptions::FullDebugInfo; 2796 RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion, 2797 DebuggerTuning); 2798 2799 // -fdebug-macro turns on macro debug info generation. 2800 if (Args.hasFlag(options::OPT_fdebug_macro, options::OPT_fno_debug_macro, 2801 false)) 2802 CmdArgs.push_back("-debug-info-macro"); 2803 2804 // -ggnu-pubnames turns on gnu style pubnames in the backend. 2805 if (Args.hasArg(options::OPT_ggnu_pubnames)) { 2806 CmdArgs.push_back("-backend-option"); 2807 CmdArgs.push_back("-generate-gnu-dwarf-pub-sections"); 2808 } 2809 2810 // -gdwarf-aranges turns on the emission of the aranges section in the 2811 // backend. 2812 // Always enabled on the PS4. 2813 if (Args.hasArg(options::OPT_gdwarf_aranges) || IsPS4CPU) { 2814 CmdArgs.push_back("-backend-option"); 2815 CmdArgs.push_back("-generate-arange-section"); 2816 } 2817 2818 if (Args.hasFlag(options::OPT_fdebug_types_section, 2819 options::OPT_fno_debug_types_section, false)) { 2820 CmdArgs.push_back("-backend-option"); 2821 CmdArgs.push_back("-generate-type-units"); 2822 } 2823 2824 bool UseSeparateSections = isUseSeparateSections(Triple); 2825 2826 if (Args.hasFlag(options::OPT_ffunction_sections, 2827 options::OPT_fno_function_sections, UseSeparateSections)) { 2828 CmdArgs.push_back("-ffunction-sections"); 2829 } 2830 2831 if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections, 2832 UseSeparateSections)) { 2833 CmdArgs.push_back("-fdata-sections"); 2834 } 2835 2836 if (!Args.hasFlag(options::OPT_funique_section_names, 2837 options::OPT_fno_unique_section_names, true)) 2838 CmdArgs.push_back("-fno-unique-section-names"); 2839 2840 Args.AddAllArgs(CmdArgs, options::OPT_finstrument_functions); 2841 2842 addPGOAndCoverageFlags(C, D, Output, Args, CmdArgs); 2843 2844 // Add runtime flag for PS4 when PGO or Coverage are enabled. 2845 if (getToolChain().getTriple().isPS4CPU()) 2846 PS4cpu::addProfileRTArgs(getToolChain(), Args, CmdArgs); 2847 2848 // Pass options for controlling the default header search paths. 2849 if (Args.hasArg(options::OPT_nostdinc)) { 2850 CmdArgs.push_back("-nostdsysteminc"); 2851 CmdArgs.push_back("-nobuiltininc"); 2852 } else { 2853 if (Args.hasArg(options::OPT_nostdlibinc)) 2854 CmdArgs.push_back("-nostdsysteminc"); 2855 Args.AddLastArg(CmdArgs, options::OPT_nostdincxx); 2856 Args.AddLastArg(CmdArgs, options::OPT_nobuiltininc); 2857 } 2858 2859 // Pass the path to compiler resource files. 2860 CmdArgs.push_back("-resource-dir"); 2861 CmdArgs.push_back(D.ResourceDir.c_str()); 2862 2863 Args.AddLastArg(CmdArgs, options::OPT_working_directory); 2864 2865 bool ARCMTEnabled = false; 2866 if (!Args.hasArg(options::OPT_fno_objc_arc, options::OPT_fobjc_arc)) { 2867 if (const Arg *A = Args.getLastArg(options::OPT_ccc_arcmt_check, 2868 options::OPT_ccc_arcmt_modify, 2869 options::OPT_ccc_arcmt_migrate)) { 2870 ARCMTEnabled = true; 2871 switch (A->getOption().getID()) { 2872 default: 2873 llvm_unreachable("missed a case"); 2874 case options::OPT_ccc_arcmt_check: 2875 CmdArgs.push_back("-arcmt-check"); 2876 break; 2877 case options::OPT_ccc_arcmt_modify: 2878 CmdArgs.push_back("-arcmt-modify"); 2879 break; 2880 case options::OPT_ccc_arcmt_migrate: 2881 CmdArgs.push_back("-arcmt-migrate"); 2882 CmdArgs.push_back("-mt-migrate-directory"); 2883 CmdArgs.push_back(A->getValue()); 2884 2885 Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_report_output); 2886 Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_emit_arc_errors); 2887 break; 2888 } 2889 } 2890 } else { 2891 Args.ClaimAllArgs(options::OPT_ccc_arcmt_check); 2892 Args.ClaimAllArgs(options::OPT_ccc_arcmt_modify); 2893 Args.ClaimAllArgs(options::OPT_ccc_arcmt_migrate); 2894 } 2895 2896 if (const Arg *A = Args.getLastArg(options::OPT_ccc_objcmt_migrate)) { 2897 if (ARCMTEnabled) { 2898 D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args) 2899 << "-ccc-arcmt-migrate"; 2900 } 2901 CmdArgs.push_back("-mt-migrate-directory"); 2902 CmdArgs.push_back(A->getValue()); 2903 2904 if (!Args.hasArg(options::OPT_objcmt_migrate_literals, 2905 options::OPT_objcmt_migrate_subscripting, 2906 options::OPT_objcmt_migrate_property)) { 2907 // None specified, means enable them all. 2908 CmdArgs.push_back("-objcmt-migrate-literals"); 2909 CmdArgs.push_back("-objcmt-migrate-subscripting"); 2910 CmdArgs.push_back("-objcmt-migrate-property"); 2911 } else { 2912 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals); 2913 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting); 2914 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property); 2915 } 2916 } else { 2917 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals); 2918 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting); 2919 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property); 2920 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_all); 2921 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readonly_property); 2922 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readwrite_property); 2923 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property_dot_syntax); 2924 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_annotation); 2925 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_instancetype); 2926 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_nsmacros); 2927 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_protocol_conformance); 2928 Args.AddLastArg(CmdArgs, options::OPT_objcmt_atomic_property); 2929 Args.AddLastArg(CmdArgs, options::OPT_objcmt_returns_innerpointer_property); 2930 Args.AddLastArg(CmdArgs, options::OPT_objcmt_ns_nonatomic_iosonly); 2931 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_designated_init); 2932 Args.AddLastArg(CmdArgs, options::OPT_objcmt_whitelist_dir_path); 2933 } 2934 2935 // Add preprocessing options like -I, -D, etc. if we are using the 2936 // preprocessor. 2937 // 2938 // FIXME: Support -fpreprocessed 2939 if (types::getPreprocessedType(InputType) != types::TY_INVALID) 2940 AddPreprocessingOptions(C, JA, D, Args, CmdArgs, Output, Inputs); 2941 2942 // Don't warn about "clang -c -DPIC -fPIC test.i" because libtool.m4 assumes 2943 // that "The compiler can only warn and ignore the option if not recognized". 2944 // When building with ccache, it will pass -D options to clang even on 2945 // preprocessed inputs and configure concludes that -fPIC is not supported. 2946 Args.ClaimAllArgs(options::OPT_D); 2947 2948 // Manually translate -O4 to -O3; let clang reject others. 2949 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) { 2950 if (A->getOption().matches(options::OPT_O4)) { 2951 CmdArgs.push_back("-O3"); 2952 D.Diag(diag::warn_O4_is_O3); 2953 } else { 2954 A->render(Args, CmdArgs); 2955 } 2956 } 2957 2958 // Warn about ignored options to clang. 2959 for (const Arg *A : 2960 Args.filtered(options::OPT_clang_ignored_gcc_optimization_f_Group)) { 2961 D.Diag(diag::warn_ignored_gcc_optimization) << A->getAsString(Args); 2962 A->claim(); 2963 } 2964 2965 claimNoWarnArgs(Args); 2966 2967 Args.AddAllArgs(CmdArgs, options::OPT_R_Group); 2968 2969 Args.AddAllArgs(CmdArgs, options::OPT_W_Group); 2970 if (Args.hasFlag(options::OPT_pedantic, options::OPT_no_pedantic, false)) 2971 CmdArgs.push_back("-pedantic"); 2972 Args.AddLastArg(CmdArgs, options::OPT_pedantic_errors); 2973 Args.AddLastArg(CmdArgs, options::OPT_w); 2974 2975 // Handle -{std, ansi, trigraphs} -- take the last of -{std, ansi} 2976 // (-ansi is equivalent to -std=c89 or -std=c++98). 2977 // 2978 // If a std is supplied, only add -trigraphs if it follows the 2979 // option. 2980 bool ImplyVCPPCXXVer = false; 2981 if (Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi)) { 2982 if (Std->getOption().matches(options::OPT_ansi)) 2983 if (types::isCXX(InputType)) 2984 CmdArgs.push_back("-std=c++98"); 2985 else 2986 CmdArgs.push_back("-std=c89"); 2987 else 2988 Std->render(Args, CmdArgs); 2989 2990 // If -f(no-)trigraphs appears after the language standard flag, honor it. 2991 if (Arg *A = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi, 2992 options::OPT_ftrigraphs, 2993 options::OPT_fno_trigraphs)) 2994 if (A != Std) 2995 A->render(Args, CmdArgs); 2996 } else { 2997 // Honor -std-default. 2998 // 2999 // FIXME: Clang doesn't correctly handle -std= when the input language 3000 // doesn't match. For the time being just ignore this for C++ inputs; 3001 // eventually we want to do all the standard defaulting here instead of 3002 // splitting it between the driver and clang -cc1. 3003 if (!types::isCXX(InputType)) 3004 Args.AddAllArgsTranslated(CmdArgs, options::OPT_std_default_EQ, "-std=", 3005 /*Joined=*/true); 3006 else if (IsWindowsMSVC) 3007 ImplyVCPPCXXVer = true; 3008 3009 Args.AddLastArg(CmdArgs, options::OPT_ftrigraphs, 3010 options::OPT_fno_trigraphs); 3011 } 3012 3013 // GCC's behavior for -Wwrite-strings is a bit strange: 3014 // * In C, this "warning flag" changes the types of string literals from 3015 // 'char[N]' to 'const char[N]', and thus triggers an unrelated warning 3016 // for the discarded qualifier. 3017 // * In C++, this is just a normal warning flag. 3018 // 3019 // Implementing this warning correctly in C is hard, so we follow GCC's 3020 // behavior for now. FIXME: Directly diagnose uses of a string literal as 3021 // a non-const char* in C, rather than using this crude hack. 3022 if (!types::isCXX(InputType)) { 3023 // FIXME: This should behave just like a warning flag, and thus should also 3024 // respect -Weverything, -Wno-everything, -Werror=write-strings, and so on. 3025 Arg *WriteStrings = 3026 Args.getLastArg(options::OPT_Wwrite_strings, 3027 options::OPT_Wno_write_strings, options::OPT_w); 3028 if (WriteStrings && 3029 WriteStrings->getOption().matches(options::OPT_Wwrite_strings)) 3030 CmdArgs.push_back("-fconst-strings"); 3031 } 3032 3033 // GCC provides a macro definition '__DEPRECATED' when -Wdeprecated is active 3034 // during C++ compilation, which it is by default. GCC keeps this define even 3035 // in the presence of '-w', match this behavior bug-for-bug. 3036 if (types::isCXX(InputType) && 3037 Args.hasFlag(options::OPT_Wdeprecated, options::OPT_Wno_deprecated, 3038 true)) { 3039 CmdArgs.push_back("-fdeprecated-macro"); 3040 } 3041 3042 // Translate GCC's misnamer '-fasm' arguments to '-fgnu-keywords'. 3043 if (Arg *Asm = Args.getLastArg(options::OPT_fasm, options::OPT_fno_asm)) { 3044 if (Asm->getOption().matches(options::OPT_fasm)) 3045 CmdArgs.push_back("-fgnu-keywords"); 3046 else 3047 CmdArgs.push_back("-fno-gnu-keywords"); 3048 } 3049 3050 if (ShouldDisableDwarfDirectory(Args, getToolChain())) 3051 CmdArgs.push_back("-fno-dwarf-directory-asm"); 3052 3053 if (ShouldDisableAutolink(Args, getToolChain())) 3054 CmdArgs.push_back("-fno-autolink"); 3055 3056 // Add in -fdebug-compilation-dir if necessary. 3057 addDebugCompDirArg(Args, CmdArgs); 3058 3059 for (const Arg *A : Args.filtered(options::OPT_fdebug_prefix_map_EQ)) { 3060 StringRef Map = A->getValue(); 3061 if (Map.find('=') == StringRef::npos) 3062 D.Diag(diag::err_drv_invalid_argument_to_fdebug_prefix_map) << Map; 3063 else 3064 CmdArgs.push_back(Args.MakeArgString("-fdebug-prefix-map=" + Map)); 3065 A->claim(); 3066 } 3067 3068 if (Arg *A = Args.getLastArg(options::OPT_ftemplate_depth_, 3069 options::OPT_ftemplate_depth_EQ)) { 3070 CmdArgs.push_back("-ftemplate-depth"); 3071 CmdArgs.push_back(A->getValue()); 3072 } 3073 3074 if (Arg *A = Args.getLastArg(options::OPT_foperator_arrow_depth_EQ)) { 3075 CmdArgs.push_back("-foperator-arrow-depth"); 3076 CmdArgs.push_back(A->getValue()); 3077 } 3078 3079 if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_depth_EQ)) { 3080 CmdArgs.push_back("-fconstexpr-depth"); 3081 CmdArgs.push_back(A->getValue()); 3082 } 3083 3084 if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_steps_EQ)) { 3085 CmdArgs.push_back("-fconstexpr-steps"); 3086 CmdArgs.push_back(A->getValue()); 3087 } 3088 3089 if (Arg *A = Args.getLastArg(options::OPT_fbracket_depth_EQ)) { 3090 CmdArgs.push_back("-fbracket-depth"); 3091 CmdArgs.push_back(A->getValue()); 3092 } 3093 3094 if (Arg *A = Args.getLastArg(options::OPT_Wlarge_by_value_copy_EQ, 3095 options::OPT_Wlarge_by_value_copy_def)) { 3096 if (A->getNumValues()) { 3097 StringRef bytes = A->getValue(); 3098 CmdArgs.push_back(Args.MakeArgString("-Wlarge-by-value-copy=" + bytes)); 3099 } else 3100 CmdArgs.push_back("-Wlarge-by-value-copy=64"); // default value 3101 } 3102 3103 if (Args.hasArg(options::OPT_relocatable_pch)) 3104 CmdArgs.push_back("-relocatable-pch"); 3105 3106 if (Arg *A = Args.getLastArg(options::OPT_fconstant_string_class_EQ)) { 3107 CmdArgs.push_back("-fconstant-string-class"); 3108 CmdArgs.push_back(A->getValue()); 3109 } 3110 3111 if (Arg *A = Args.getLastArg(options::OPT_ftabstop_EQ)) { 3112 CmdArgs.push_back("-ftabstop"); 3113 CmdArgs.push_back(A->getValue()); 3114 } 3115 3116 CmdArgs.push_back("-ferror-limit"); 3117 if (Arg *A = Args.getLastArg(options::OPT_ferror_limit_EQ)) 3118 CmdArgs.push_back(A->getValue()); 3119 else 3120 CmdArgs.push_back("19"); 3121 3122 if (Arg *A = Args.getLastArg(options::OPT_fmacro_backtrace_limit_EQ)) { 3123 CmdArgs.push_back("-fmacro-backtrace-limit"); 3124 CmdArgs.push_back(A->getValue()); 3125 } 3126 3127 if (Arg *A = Args.getLastArg(options::OPT_ftemplate_backtrace_limit_EQ)) { 3128 CmdArgs.push_back("-ftemplate-backtrace-limit"); 3129 CmdArgs.push_back(A->getValue()); 3130 } 3131 3132 if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_backtrace_limit_EQ)) { 3133 CmdArgs.push_back("-fconstexpr-backtrace-limit"); 3134 CmdArgs.push_back(A->getValue()); 3135 } 3136 3137 if (Arg *A = Args.getLastArg(options::OPT_fspell_checking_limit_EQ)) { 3138 CmdArgs.push_back("-fspell-checking-limit"); 3139 CmdArgs.push_back(A->getValue()); 3140 } 3141 3142 // Pass -fmessage-length=. 3143 CmdArgs.push_back("-fmessage-length"); 3144 if (Arg *A = Args.getLastArg(options::OPT_fmessage_length_EQ)) { 3145 CmdArgs.push_back(A->getValue()); 3146 } else { 3147 // If -fmessage-length=N was not specified, determine whether this is a 3148 // terminal and, if so, implicitly define -fmessage-length appropriately. 3149 unsigned N = llvm::sys::Process::StandardErrColumns(); 3150 CmdArgs.push_back(Args.MakeArgString(Twine(N))); 3151 } 3152 3153 // -fvisibility= and -fvisibility-ms-compat are of a piece. 3154 if (const Arg *A = Args.getLastArg(options::OPT_fvisibility_EQ, 3155 options::OPT_fvisibility_ms_compat)) { 3156 if (A->getOption().matches(options::OPT_fvisibility_EQ)) { 3157 CmdArgs.push_back("-fvisibility"); 3158 CmdArgs.push_back(A->getValue()); 3159 } else { 3160 assert(A->getOption().matches(options::OPT_fvisibility_ms_compat)); 3161 CmdArgs.push_back("-fvisibility"); 3162 CmdArgs.push_back("hidden"); 3163 CmdArgs.push_back("-ftype-visibility"); 3164 CmdArgs.push_back("default"); 3165 } 3166 } 3167 3168 Args.AddLastArg(CmdArgs, options::OPT_fvisibility_inlines_hidden); 3169 3170 Args.AddLastArg(CmdArgs, options::OPT_ftlsmodel_EQ); 3171 3172 // -fhosted is default. 3173 bool IsHosted = true; 3174 if (Args.hasFlag(options::OPT_ffreestanding, options::OPT_fhosted, false) || 3175 KernelOrKext) { 3176 CmdArgs.push_back("-ffreestanding"); 3177 IsHosted = false; 3178 } 3179 3180 // Forward -f (flag) options which we can pass directly. 3181 Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls); 3182 Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions); 3183 Args.AddLastArg(CmdArgs, options::OPT_fno_operator_names); 3184 // Emulated TLS is enabled by default on Android, and can be enabled manually 3185 // with -femulated-tls. 3186 bool EmulatedTLSDefault = Triple.isAndroid() || Triple.isWindowsCygwinEnvironment(); 3187 if (Args.hasFlag(options::OPT_femulated_tls, options::OPT_fno_emulated_tls, 3188 EmulatedTLSDefault)) 3189 CmdArgs.push_back("-femulated-tls"); 3190 // AltiVec-like language extensions aren't relevant for assembling. 3191 if (!isa<PreprocessJobAction>(JA) || Output.getType() != types::TY_PP_Asm) 3192 Args.AddLastArg(CmdArgs, options::OPT_fzvector); 3193 3194 Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_show_template_tree); 3195 Args.AddLastArg(CmdArgs, options::OPT_fno_elide_type); 3196 3197 // Forward flags for OpenMP. We don't do this if the current action is an 3198 // device offloading action other than OpenMP. 3199 if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ, 3200 options::OPT_fno_openmp, false) && 3201 (JA.isDeviceOffloading(Action::OFK_None) || 3202 JA.isDeviceOffloading(Action::OFK_OpenMP))) { 3203 switch (getToolChain().getDriver().getOpenMPRuntime(Args)) { 3204 case Driver::OMPRT_OMP: 3205 case Driver::OMPRT_IOMP5: 3206 // Clang can generate useful OpenMP code for these two runtime libraries. 3207 CmdArgs.push_back("-fopenmp"); 3208 3209 // If no option regarding the use of TLS in OpenMP codegeneration is 3210 // given, decide a default based on the target. Otherwise rely on the 3211 // options and pass the right information to the frontend. 3212 if (!Args.hasFlag(options::OPT_fopenmp_use_tls, 3213 options::OPT_fnoopenmp_use_tls, /*Default=*/true)) 3214 CmdArgs.push_back("-fnoopenmp-use-tls"); 3215 Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ); 3216 break; 3217 default: 3218 // By default, if Clang doesn't know how to generate useful OpenMP code 3219 // for a specific runtime library, we just don't pass the '-fopenmp' flag 3220 // down to the actual compilation. 3221 // FIXME: It would be better to have a mode which *only* omits IR 3222 // generation based on the OpenMP support so that we get consistent 3223 // semantic analysis, etc. 3224 break; 3225 } 3226 } 3227 3228 const SanitizerArgs &Sanitize = getToolChain().getSanitizerArgs(); 3229 Sanitize.addArgs(getToolChain(), Args, CmdArgs, InputType); 3230 3231 const XRayArgs &XRay = getToolChain().getXRayArgs(); 3232 XRay.addArgs(getToolChain(), Args, CmdArgs, InputType); 3233 3234 if (getToolChain().SupportsProfiling()) 3235 Args.AddLastArg(CmdArgs, options::OPT_pg); 3236 3237 if (getToolChain().SupportsProfiling()) 3238 Args.AddLastArg(CmdArgs, options::OPT_mfentry); 3239 3240 // -flax-vector-conversions is default. 3241 if (!Args.hasFlag(options::OPT_flax_vector_conversions, 3242 options::OPT_fno_lax_vector_conversions)) 3243 CmdArgs.push_back("-fno-lax-vector-conversions"); 3244 3245 if (Args.getLastArg(options::OPT_fapple_kext) || 3246 (Args.hasArg(options::OPT_mkernel) && types::isCXX(InputType))) 3247 CmdArgs.push_back("-fapple-kext"); 3248 3249 Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch); 3250 Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_print_source_range_info); 3251 Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits); 3252 Args.AddLastArg(CmdArgs, options::OPT_ftime_report); 3253 Args.AddLastArg(CmdArgs, options::OPT_ftrapv); 3254 3255 if (Arg *A = Args.getLastArg(options::OPT_ftrapv_handler_EQ)) { 3256 CmdArgs.push_back("-ftrapv-handler"); 3257 CmdArgs.push_back(A->getValue()); 3258 } 3259 3260 Args.AddLastArg(CmdArgs, options::OPT_ftrap_function_EQ); 3261 3262 // -fno-strict-overflow implies -fwrapv if it isn't disabled, but 3263 // -fstrict-overflow won't turn off an explicitly enabled -fwrapv. 3264 if (Arg *A = Args.getLastArg(options::OPT_fwrapv, options::OPT_fno_wrapv)) { 3265 if (A->getOption().matches(options::OPT_fwrapv)) 3266 CmdArgs.push_back("-fwrapv"); 3267 } else if (Arg *A = Args.getLastArg(options::OPT_fstrict_overflow, 3268 options::OPT_fno_strict_overflow)) { 3269 if (A->getOption().matches(options::OPT_fno_strict_overflow)) 3270 CmdArgs.push_back("-fwrapv"); 3271 } 3272 3273 if (Arg *A = Args.getLastArg(options::OPT_freroll_loops, 3274 options::OPT_fno_reroll_loops)) 3275 if (A->getOption().matches(options::OPT_freroll_loops)) 3276 CmdArgs.push_back("-freroll-loops"); 3277 3278 Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings); 3279 Args.AddLastArg(CmdArgs, options::OPT_funroll_loops, 3280 options::OPT_fno_unroll_loops); 3281 3282 Args.AddLastArg(CmdArgs, options::OPT_pthread); 3283 3284 // -stack-protector=0 is default. 3285 unsigned StackProtectorLevel = 0; 3286 // NVPTX doesn't support stack protectors; from the compiler's perspective, it 3287 // doesn't even have a stack! 3288 if (!Triple.isNVPTX()) { 3289 if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector, 3290 options::OPT_fstack_protector_all, 3291 options::OPT_fstack_protector_strong, 3292 options::OPT_fstack_protector)) { 3293 if (A->getOption().matches(options::OPT_fstack_protector)) { 3294 StackProtectorLevel = std::max<unsigned>( 3295 LangOptions::SSPOn, 3296 getToolChain().GetDefaultStackProtectorLevel(KernelOrKext)); 3297 } else if (A->getOption().matches(options::OPT_fstack_protector_strong)) 3298 StackProtectorLevel = LangOptions::SSPStrong; 3299 else if (A->getOption().matches(options::OPT_fstack_protector_all)) 3300 StackProtectorLevel = LangOptions::SSPReq; 3301 } else { 3302 StackProtectorLevel = 3303 getToolChain().GetDefaultStackProtectorLevel(KernelOrKext); 3304 // Only use a default stack protector on Darwin in case -ffreestanding 3305 // is not specified. 3306 if (Triple.isOSDarwin() && !IsHosted) 3307 StackProtectorLevel = 0; 3308 } 3309 } 3310 if (StackProtectorLevel) { 3311 CmdArgs.push_back("-stack-protector"); 3312 CmdArgs.push_back(Args.MakeArgString(Twine(StackProtectorLevel))); 3313 } 3314 3315 // --param ssp-buffer-size= 3316 for (const Arg *A : Args.filtered(options::OPT__param)) { 3317 StringRef Str(A->getValue()); 3318 if (Str.startswith("ssp-buffer-size=")) { 3319 if (StackProtectorLevel) { 3320 CmdArgs.push_back("-stack-protector-buffer-size"); 3321 // FIXME: Verify the argument is a valid integer. 3322 CmdArgs.push_back(Args.MakeArgString(Str.drop_front(16))); 3323 } 3324 A->claim(); 3325 } 3326 } 3327 3328 // Translate -mstackrealign 3329 if (Args.hasFlag(options::OPT_mstackrealign, options::OPT_mno_stackrealign, 3330 false)) 3331 CmdArgs.push_back(Args.MakeArgString("-mstackrealign")); 3332 3333 if (Args.hasArg(options::OPT_mstack_alignment)) { 3334 StringRef alignment = Args.getLastArgValue(options::OPT_mstack_alignment); 3335 CmdArgs.push_back(Args.MakeArgString("-mstack-alignment=" + alignment)); 3336 } 3337 3338 if (Args.hasArg(options::OPT_mstack_probe_size)) { 3339 StringRef Size = Args.getLastArgValue(options::OPT_mstack_probe_size); 3340 3341 if (!Size.empty()) 3342 CmdArgs.push_back(Args.MakeArgString("-mstack-probe-size=" + Size)); 3343 else 3344 CmdArgs.push_back("-mstack-probe-size=0"); 3345 } 3346 3347 switch (getToolChain().getArch()) { 3348 case llvm::Triple::aarch64: 3349 case llvm::Triple::aarch64_be: 3350 case llvm::Triple::arm: 3351 case llvm::Triple::armeb: 3352 case llvm::Triple::thumb: 3353 case llvm::Triple::thumbeb: 3354 CmdArgs.push_back("-fallow-half-arguments-and-returns"); 3355 break; 3356 3357 default: 3358 break; 3359 } 3360 3361 if (Arg *A = Args.getLastArg(options::OPT_mrestrict_it, 3362 options::OPT_mno_restrict_it)) { 3363 if (A->getOption().matches(options::OPT_mrestrict_it)) { 3364 CmdArgs.push_back("-backend-option"); 3365 CmdArgs.push_back("-arm-restrict-it"); 3366 } else { 3367 CmdArgs.push_back("-backend-option"); 3368 CmdArgs.push_back("-arm-no-restrict-it"); 3369 } 3370 } else if (Triple.isOSWindows() && 3371 (Triple.getArch() == llvm::Triple::arm || 3372 Triple.getArch() == llvm::Triple::thumb)) { 3373 // Windows on ARM expects restricted IT blocks 3374 CmdArgs.push_back("-backend-option"); 3375 CmdArgs.push_back("-arm-restrict-it"); 3376 } 3377 3378 // Forward -cl options to -cc1 3379 if (Args.getLastArg(options::OPT_cl_opt_disable)) { 3380 CmdArgs.push_back("-cl-opt-disable"); 3381 } 3382 if (Args.getLastArg(options::OPT_cl_strict_aliasing)) { 3383 CmdArgs.push_back("-cl-strict-aliasing"); 3384 } 3385 if (Args.getLastArg(options::OPT_cl_single_precision_constant)) { 3386 CmdArgs.push_back("-cl-single-precision-constant"); 3387 } 3388 if (Args.getLastArg(options::OPT_cl_finite_math_only)) { 3389 CmdArgs.push_back("-cl-finite-math-only"); 3390 } 3391 if (Args.getLastArg(options::OPT_cl_kernel_arg_info)) { 3392 CmdArgs.push_back("-cl-kernel-arg-info"); 3393 } 3394 if (Args.getLastArg(options::OPT_cl_unsafe_math_optimizations)) { 3395 CmdArgs.push_back("-cl-unsafe-math-optimizations"); 3396 } 3397 if (Args.getLastArg(options::OPT_cl_fast_relaxed_math)) { 3398 CmdArgs.push_back("-cl-fast-relaxed-math"); 3399 } 3400 if (Args.getLastArg(options::OPT_cl_mad_enable)) { 3401 CmdArgs.push_back("-cl-mad-enable"); 3402 } 3403 if (Args.getLastArg(options::OPT_cl_no_signed_zeros)) { 3404 CmdArgs.push_back("-cl-no-signed-zeros"); 3405 } 3406 if (Arg *A = Args.getLastArg(options::OPT_cl_std_EQ)) { 3407 std::string CLStdStr = "-cl-std="; 3408 CLStdStr += A->getValue(); 3409 CmdArgs.push_back(Args.MakeArgString(CLStdStr)); 3410 } 3411 if (Args.getLastArg(options::OPT_cl_denorms_are_zero)) { 3412 CmdArgs.push_back("-cl-denorms-are-zero"); 3413 } 3414 if (Args.getLastArg(options::OPT_cl_fp32_correctly_rounded_divide_sqrt)) { 3415 CmdArgs.push_back("-cl-fp32-correctly-rounded-divide-sqrt"); 3416 } 3417 3418 // Forward -f options with positive and negative forms; we translate 3419 // these by hand. 3420 if (Arg *A = getLastProfileSampleUseArg(Args)) { 3421 StringRef fname = A->getValue(); 3422 if (!llvm::sys::fs::exists(fname)) 3423 D.Diag(diag::err_drv_no_such_file) << fname; 3424 else 3425 A->render(Args, CmdArgs); 3426 } 3427 3428 if (Args.hasFlag(options::OPT_fdebug_info_for_profiling, 3429 options::OPT_fno_debug_info_for_profiling, false)) 3430 CmdArgs.push_back("-fdebug-info-for-profiling"); 3431 3432 // -fbuiltin is default unless -mkernel is used. 3433 bool UseBuiltins = 3434 Args.hasFlag(options::OPT_fbuiltin, options::OPT_fno_builtin, 3435 !Args.hasArg(options::OPT_mkernel)); 3436 if (!UseBuiltins) 3437 CmdArgs.push_back("-fno-builtin"); 3438 3439 // -ffreestanding implies -fno-builtin. 3440 if (Args.hasArg(options::OPT_ffreestanding)) 3441 UseBuiltins = false; 3442 3443 // Process the -fno-builtin-* options. 3444 for (const auto &Arg : Args) { 3445 const Option &O = Arg->getOption(); 3446 if (!O.matches(options::OPT_fno_builtin_)) 3447 continue; 3448 3449 Arg->claim(); 3450 // If -fno-builtin is specified, then there's no need to pass the option to 3451 // the frontend. 3452 if (!UseBuiltins) 3453 continue; 3454 3455 StringRef FuncName = Arg->getValue(); 3456 CmdArgs.push_back(Args.MakeArgString("-fno-builtin-" + FuncName)); 3457 } 3458 3459 if (!Args.hasFlag(options::OPT_fassume_sane_operator_new, 3460 options::OPT_fno_assume_sane_operator_new)) 3461 CmdArgs.push_back("-fno-assume-sane-operator-new"); 3462 3463 // -fblocks=0 is default. 3464 if (Args.hasFlag(options::OPT_fblocks, options::OPT_fno_blocks, 3465 getToolChain().IsBlocksDefault()) || 3466 (Args.hasArg(options::OPT_fgnu_runtime) && 3467 Args.hasArg(options::OPT_fobjc_nonfragile_abi) && 3468 !Args.hasArg(options::OPT_fno_blocks))) { 3469 CmdArgs.push_back("-fblocks"); 3470 3471 if (!Args.hasArg(options::OPT_fgnu_runtime) && 3472 !getToolChain().hasBlocksRuntime()) 3473 CmdArgs.push_back("-fblocks-runtime-optional"); 3474 } 3475 3476 if (Args.hasFlag(options::OPT_fcoroutines_ts, options::OPT_fno_coroutines_ts, 3477 false) && 3478 types::isCXX(InputType)) { 3479 CmdArgs.push_back("-fcoroutines-ts"); 3480 } 3481 3482 // -fmodules enables the use of precompiled modules (off by default). 3483 // Users can pass -fno-cxx-modules to turn off modules support for 3484 // C++/Objective-C++ programs. 3485 bool HaveClangModules = false; 3486 if (Args.hasFlag(options::OPT_fmodules, options::OPT_fno_modules, false)) { 3487 bool AllowedInCXX = Args.hasFlag(options::OPT_fcxx_modules, 3488 options::OPT_fno_cxx_modules, true); 3489 if (AllowedInCXX || !types::isCXX(InputType)) { 3490 CmdArgs.push_back("-fmodules"); 3491 HaveClangModules = true; 3492 } 3493 } 3494 3495 bool HaveAnyModules = HaveClangModules; 3496 if (Args.hasArg(options::OPT_fmodules_ts)) { 3497 CmdArgs.push_back("-fmodules-ts"); 3498 HaveAnyModules = true; 3499 } 3500 3501 // -fmodule-maps enables implicit reading of module map files. By default, 3502 // this is enabled if we are using Clang's flavor of precompiled modules. 3503 if (Args.hasFlag(options::OPT_fimplicit_module_maps, 3504 options::OPT_fno_implicit_module_maps, HaveClangModules)) { 3505 CmdArgs.push_back("-fimplicit-module-maps"); 3506 } 3507 3508 // -fmodules-decluse checks that modules used are declared so (off by 3509 // default). 3510 if (Args.hasFlag(options::OPT_fmodules_decluse, 3511 options::OPT_fno_modules_decluse, false)) { 3512 CmdArgs.push_back("-fmodules-decluse"); 3513 } 3514 3515 // -fmodules-strict-decluse is like -fmodule-decluse, but also checks that 3516 // all #included headers are part of modules. 3517 if (Args.hasFlag(options::OPT_fmodules_strict_decluse, 3518 options::OPT_fno_modules_strict_decluse, false)) { 3519 CmdArgs.push_back("-fmodules-strict-decluse"); 3520 } 3521 3522 // -fno-implicit-modules turns off implicitly compiling modules on demand. 3523 if (!Args.hasFlag(options::OPT_fimplicit_modules, 3524 options::OPT_fno_implicit_modules, HaveClangModules)) { 3525 if (HaveAnyModules) 3526 CmdArgs.push_back("-fno-implicit-modules"); 3527 } else if (HaveAnyModules) { 3528 // -fmodule-cache-path specifies where our implicitly-built module files 3529 // should be written. 3530 SmallString<128> Path; 3531 if (Arg *A = Args.getLastArg(options::OPT_fmodules_cache_path)) 3532 Path = A->getValue(); 3533 if (C.isForDiagnostics()) { 3534 // When generating crash reports, we want to emit the modules along with 3535 // the reproduction sources, so we ignore any provided module path. 3536 Path = Output.getFilename(); 3537 llvm::sys::path::replace_extension(Path, ".cache"); 3538 llvm::sys::path::append(Path, "modules"); 3539 } else if (Path.empty()) { 3540 // No module path was provided: use the default. 3541 llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/false, Path); 3542 llvm::sys::path::append(Path, "org.llvm.clang."); 3543 appendUserToPath(Path); 3544 llvm::sys::path::append(Path, "ModuleCache"); 3545 } 3546 const char Arg[] = "-fmodules-cache-path="; 3547 Path.insert(Path.begin(), Arg, Arg + strlen(Arg)); 3548 CmdArgs.push_back(Args.MakeArgString(Path)); 3549 } 3550 3551 if (HaveAnyModules) { 3552 // -fprebuilt-module-path specifies where to load the prebuilt module files. 3553 for (const Arg *A : Args.filtered(options::OPT_fprebuilt_module_path)) 3554 CmdArgs.push_back(Args.MakeArgString( 3555 std::string("-fprebuilt-module-path=") + A->getValue())); 3556 } 3557 3558 // -fmodule-name specifies the module that is currently being built (or 3559 // used for header checking by -fmodule-maps). 3560 Args.AddLastArg(CmdArgs, options::OPT_fmodule_name_EQ); 3561 3562 // -fmodule-map-file can be used to specify files containing module 3563 // definitions. 3564 Args.AddAllArgs(CmdArgs, options::OPT_fmodule_map_file); 3565 3566 // -fbuiltin-module-map can be used to load the clang 3567 // builtin headers modulemap file. 3568 if (Args.hasArg(options::OPT_fbuiltin_module_map)) { 3569 SmallString<128> BuiltinModuleMap(getToolChain().getDriver().ResourceDir); 3570 llvm::sys::path::append(BuiltinModuleMap, "include"); 3571 llvm::sys::path::append(BuiltinModuleMap, "module.modulemap"); 3572 if (llvm::sys::fs::exists(BuiltinModuleMap)) { 3573 CmdArgs.push_back(Args.MakeArgString("-fmodule-map-file=" + 3574 BuiltinModuleMap)); 3575 } 3576 } 3577 3578 // -fmodule-file can be used to specify files containing precompiled modules. 3579 if (HaveAnyModules) 3580 Args.AddAllArgs(CmdArgs, options::OPT_fmodule_file); 3581 else 3582 Args.ClaimAllArgs(options::OPT_fmodule_file); 3583 3584 // When building modules and generating crashdumps, we need to dump a module 3585 // dependency VFS alongside the output. 3586 if (HaveClangModules && C.isForDiagnostics()) { 3587 SmallString<128> VFSDir(Output.getFilename()); 3588 llvm::sys::path::replace_extension(VFSDir, ".cache"); 3589 // Add the cache directory as a temp so the crash diagnostics pick it up. 3590 C.addTempFile(Args.MakeArgString(VFSDir)); 3591 3592 llvm::sys::path::append(VFSDir, "vfs"); 3593 CmdArgs.push_back("-module-dependency-dir"); 3594 CmdArgs.push_back(Args.MakeArgString(VFSDir)); 3595 } 3596 3597 if (HaveClangModules) 3598 Args.AddLastArg(CmdArgs, options::OPT_fmodules_user_build_path); 3599 3600 // Pass through all -fmodules-ignore-macro arguments. 3601 Args.AddAllArgs(CmdArgs, options::OPT_fmodules_ignore_macro); 3602 Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_interval); 3603 Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_after); 3604 3605 Args.AddLastArg(CmdArgs, options::OPT_fbuild_session_timestamp); 3606 3607 if (Arg *A = Args.getLastArg(options::OPT_fbuild_session_file)) { 3608 if (Args.hasArg(options::OPT_fbuild_session_timestamp)) 3609 D.Diag(diag::err_drv_argument_not_allowed_with) 3610 << A->getAsString(Args) << "-fbuild-session-timestamp"; 3611 3612 llvm::sys::fs::file_status Status; 3613 if (llvm::sys::fs::status(A->getValue(), Status)) 3614 D.Diag(diag::err_drv_no_such_file) << A->getValue(); 3615 CmdArgs.push_back( 3616 Args.MakeArgString("-fbuild-session-timestamp=" + 3617 Twine((uint64_t)Status.getLastModificationTime() 3618 .time_since_epoch() 3619 .count()))); 3620 } 3621 3622 if (Args.getLastArg(options::OPT_fmodules_validate_once_per_build_session)) { 3623 if (!Args.getLastArg(options::OPT_fbuild_session_timestamp, 3624 options::OPT_fbuild_session_file)) 3625 D.Diag(diag::err_drv_modules_validate_once_requires_timestamp); 3626 3627 Args.AddLastArg(CmdArgs, 3628 options::OPT_fmodules_validate_once_per_build_session); 3629 } 3630 3631 Args.AddLastArg(CmdArgs, options::OPT_fmodules_validate_system_headers); 3632 Args.AddLastArg(CmdArgs, options::OPT_fmodules_disable_diagnostic_validation); 3633 3634 // -faccess-control is default. 3635 if (Args.hasFlag(options::OPT_fno_access_control, 3636 options::OPT_faccess_control, false)) 3637 CmdArgs.push_back("-fno-access-control"); 3638 3639 // -felide-constructors is the default. 3640 if (Args.hasFlag(options::OPT_fno_elide_constructors, 3641 options::OPT_felide_constructors, false)) 3642 CmdArgs.push_back("-fno-elide-constructors"); 3643 3644 ToolChain::RTTIMode RTTIMode = getToolChain().getRTTIMode(); 3645 3646 if (KernelOrKext || (types::isCXX(InputType) && 3647 (RTTIMode == ToolChain::RM_DisabledExplicitly || 3648 RTTIMode == ToolChain::RM_DisabledImplicitly))) 3649 CmdArgs.push_back("-fno-rtti"); 3650 3651 // -fshort-enums=0 is default for all architectures except Hexagon. 3652 if (Args.hasFlag(options::OPT_fshort_enums, options::OPT_fno_short_enums, 3653 getToolChain().getArch() == llvm::Triple::hexagon)) 3654 CmdArgs.push_back("-fshort-enums"); 3655 3656 // -fsigned-char is default. 3657 if (Arg *A = Args.getLastArg( 3658 options::OPT_fsigned_char, options::OPT_fno_signed_char, 3659 options::OPT_funsigned_char, options::OPT_fno_unsigned_char)) { 3660 if (A->getOption().matches(options::OPT_funsigned_char) || 3661 A->getOption().matches(options::OPT_fno_signed_char)) { 3662 CmdArgs.push_back("-fno-signed-char"); 3663 } 3664 } else if (!isSignedCharDefault(getToolChain().getTriple())) { 3665 CmdArgs.push_back("-fno-signed-char"); 3666 } 3667 3668 // -fuse-cxa-atexit is default. 3669 if (!Args.hasFlag( 3670 options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit, 3671 !IsWindowsCygnus && !IsWindowsGNU && 3672 getToolChain().getTriple().getOS() != llvm::Triple::Solaris && 3673 getToolChain().getArch() != llvm::Triple::hexagon && 3674 getToolChain().getArch() != llvm::Triple::xcore && 3675 ((getToolChain().getTriple().getVendor() != 3676 llvm::Triple::MipsTechnologies) || 3677 getToolChain().getTriple().hasEnvironment())) || 3678 KernelOrKext) 3679 CmdArgs.push_back("-fno-use-cxa-atexit"); 3680 3681 // -fms-extensions=0 is default. 3682 if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions, 3683 IsWindowsMSVC)) 3684 CmdArgs.push_back("-fms-extensions"); 3685 3686 // -fno-use-line-directives is default. 3687 if (Args.hasFlag(options::OPT_fuse_line_directives, 3688 options::OPT_fno_use_line_directives, false)) 3689 CmdArgs.push_back("-fuse-line-directives"); 3690 3691 // -fms-compatibility=0 is default. 3692 if (Args.hasFlag(options::OPT_fms_compatibility, 3693 options::OPT_fno_ms_compatibility, 3694 (IsWindowsMSVC && 3695 Args.hasFlag(options::OPT_fms_extensions, 3696 options::OPT_fno_ms_extensions, true)))) 3697 CmdArgs.push_back("-fms-compatibility"); 3698 3699 VersionTuple MSVT = 3700 getToolChain().computeMSVCVersion(&getToolChain().getDriver(), Args); 3701 if (!MSVT.empty()) 3702 CmdArgs.push_back( 3703 Args.MakeArgString("-fms-compatibility-version=" + MSVT.getAsString())); 3704 3705 bool IsMSVC2015Compatible = MSVT.getMajor() >= 19; 3706 if (ImplyVCPPCXXVer) { 3707 StringRef LanguageStandard; 3708 if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) { 3709 LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue()) 3710 .Case("c++14", "-std=c++14") 3711 .Case("c++latest", "-std=c++1z") 3712 .Default(""); 3713 if (LanguageStandard.empty()) 3714 D.Diag(clang::diag::warn_drv_unused_argument) 3715 << StdArg->getAsString(Args); 3716 } 3717 3718 if (LanguageStandard.empty()) { 3719 if (IsMSVC2015Compatible) 3720 LanguageStandard = "-std=c++14"; 3721 else 3722 LanguageStandard = "-std=c++11"; 3723 } 3724 3725 CmdArgs.push_back(LanguageStandard.data()); 3726 } 3727 3728 // -fno-borland-extensions is default. 3729 if (Args.hasFlag(options::OPT_fborland_extensions, 3730 options::OPT_fno_borland_extensions, false)) 3731 CmdArgs.push_back("-fborland-extensions"); 3732 3733 // -fno-declspec is default, except for PS4. 3734 if (Args.hasFlag(options::OPT_fdeclspec, options::OPT_fno_declspec, 3735 getToolChain().getTriple().isPS4())) 3736 CmdArgs.push_back("-fdeclspec"); 3737 else if (Args.hasArg(options::OPT_fno_declspec)) 3738 CmdArgs.push_back("-fno-declspec"); // Explicitly disabling __declspec. 3739 3740 // -fthreadsafe-static is default, except for MSVC compatibility versions less 3741 // than 19. 3742 if (!Args.hasFlag(options::OPT_fthreadsafe_statics, 3743 options::OPT_fno_threadsafe_statics, 3744 !IsWindowsMSVC || IsMSVC2015Compatible)) 3745 CmdArgs.push_back("-fno-threadsafe-statics"); 3746 3747 // -fno-delayed-template-parsing is default, except for Windows where MSVC STL 3748 // needs it. 3749 if (Args.hasFlag(options::OPT_fdelayed_template_parsing, 3750 options::OPT_fno_delayed_template_parsing, IsWindowsMSVC)) 3751 CmdArgs.push_back("-fdelayed-template-parsing"); 3752 3753 // -fgnu-keywords default varies depending on language; only pass if 3754 // specified. 3755 if (Arg *A = Args.getLastArg(options::OPT_fgnu_keywords, 3756 options::OPT_fno_gnu_keywords)) 3757 A->render(Args, CmdArgs); 3758 3759 if (Args.hasFlag(options::OPT_fgnu89_inline, options::OPT_fno_gnu89_inline, 3760 false)) 3761 CmdArgs.push_back("-fgnu89-inline"); 3762 3763 if (Args.hasArg(options::OPT_fno_inline)) 3764 CmdArgs.push_back("-fno-inline"); 3765 3766 if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions, 3767 options::OPT_finline_hint_functions, 3768 options::OPT_fno_inline_functions)) 3769 InlineArg->render(Args, CmdArgs); 3770 3771 Args.AddLastArg(CmdArgs, options::OPT_fexperimental_new_pass_manager, 3772 options::OPT_fno_experimental_new_pass_manager); 3773 3774 ObjCRuntime objcRuntime = AddObjCRuntimeArgs(Args, CmdArgs, rewriteKind); 3775 3776 // -fobjc-dispatch-method is only relevant with the nonfragile-abi, and 3777 // legacy is the default. Except for deployment target of 10.5, 3778 // next runtime is always legacy dispatch and -fno-objc-legacy-dispatch 3779 // gets ignored silently. 3780 if (objcRuntime.isNonFragile()) { 3781 if (!Args.hasFlag(options::OPT_fobjc_legacy_dispatch, 3782 options::OPT_fno_objc_legacy_dispatch, 3783 objcRuntime.isLegacyDispatchDefaultForArch( 3784 getToolChain().getArch()))) { 3785 if (getToolChain().UseObjCMixedDispatch()) 3786 CmdArgs.push_back("-fobjc-dispatch-method=mixed"); 3787 else 3788 CmdArgs.push_back("-fobjc-dispatch-method=non-legacy"); 3789 } 3790 } 3791 3792 // When ObjectiveC legacy runtime is in effect on MacOSX, 3793 // turn on the option to do Array/Dictionary subscripting 3794 // by default. 3795 if (getToolChain().getArch() == llvm::Triple::x86 && 3796 getToolChain().getTriple().isMacOSX() && 3797 !getToolChain().getTriple().isMacOSXVersionLT(10, 7) && 3798 objcRuntime.getKind() == ObjCRuntime::FragileMacOSX && 3799 objcRuntime.isNeXTFamily()) 3800 CmdArgs.push_back("-fobjc-subscripting-legacy-runtime"); 3801 3802 // -fencode-extended-block-signature=1 is default. 3803 if (getToolChain().IsEncodeExtendedBlockSignatureDefault()) { 3804 CmdArgs.push_back("-fencode-extended-block-signature"); 3805 } 3806 3807 // Allow -fno-objc-arr to trump -fobjc-arr/-fobjc-arc. 3808 // NOTE: This logic is duplicated in ToolChains.cpp. 3809 bool ARC = isObjCAutoRefCount(Args); 3810 if (ARC) { 3811 getToolChain().CheckObjCARC(); 3812 3813 CmdArgs.push_back("-fobjc-arc"); 3814 3815 // FIXME: It seems like this entire block, and several around it should be 3816 // wrapped in isObjC, but for now we just use it here as this is where it 3817 // was being used previously. 3818 if (types::isCXX(InputType) && types::isObjC(InputType)) { 3819 if (getToolChain().GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) 3820 CmdArgs.push_back("-fobjc-arc-cxxlib=libc++"); 3821 else 3822 CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++"); 3823 } 3824 3825 // Allow the user to enable full exceptions code emission. 3826 // We define off for Objective-CC, on for Objective-C++. 3827 if (Args.hasFlag(options::OPT_fobjc_arc_exceptions, 3828 options::OPT_fno_objc_arc_exceptions, 3829 /*default*/ types::isCXX(InputType))) 3830 CmdArgs.push_back("-fobjc-arc-exceptions"); 3831 } 3832 3833 // Silence warning for full exception code emission options when explicitly 3834 // set to use no ARC. 3835 if (Args.hasArg(options::OPT_fno_objc_arc)) { 3836 Args.ClaimAllArgs(options::OPT_fobjc_arc_exceptions); 3837 Args.ClaimAllArgs(options::OPT_fno_objc_arc_exceptions); 3838 } 3839 3840 // -fobjc-infer-related-result-type is the default, except in the Objective-C 3841 // rewriter. 3842 if (rewriteKind != RK_None) 3843 CmdArgs.push_back("-fno-objc-infer-related-result-type"); 3844 3845 // Pass down -fobjc-weak or -fno-objc-weak if present. 3846 if (types::isObjC(InputType)) { 3847 auto WeakArg = Args.getLastArg(options::OPT_fobjc_weak, 3848 options::OPT_fno_objc_weak); 3849 if (!WeakArg) { 3850 // nothing to do 3851 } else if (!objcRuntime.allowsWeak()) { 3852 if (WeakArg->getOption().matches(options::OPT_fobjc_weak)) 3853 D.Diag(diag::err_objc_weak_unsupported); 3854 } else { 3855 WeakArg->render(Args, CmdArgs); 3856 } 3857 } 3858 3859 if (Args.hasFlag(options::OPT_fapplication_extension, 3860 options::OPT_fno_application_extension, false)) 3861 CmdArgs.push_back("-fapplication-extension"); 3862 3863 // Handle GCC-style exception args. 3864 if (!C.getDriver().IsCLMode()) 3865 addExceptionArgs(Args, InputType, getToolChain(), KernelOrKext, objcRuntime, 3866 CmdArgs); 3867 3868 if (Args.hasArg(options::OPT_fsjlj_exceptions) || 3869 getToolChain().UseSjLjExceptions(Args)) 3870 CmdArgs.push_back("-fsjlj-exceptions"); 3871 3872 // C++ "sane" operator new. 3873 if (!Args.hasFlag(options::OPT_fassume_sane_operator_new, 3874 options::OPT_fno_assume_sane_operator_new)) 3875 CmdArgs.push_back("-fno-assume-sane-operator-new"); 3876 3877 // -frelaxed-template-template-args is off by default, as it is a severe 3878 // breaking change until a corresponding change to template partial ordering 3879 // is provided. 3880 if (Args.hasFlag(options::OPT_frelaxed_template_template_args, 3881 options::OPT_fno_relaxed_template_template_args, false)) 3882 CmdArgs.push_back("-frelaxed-template-template-args"); 3883 3884 // -fsized-deallocation is off by default, as it is an ABI-breaking change for 3885 // most platforms. 3886 if (Args.hasFlag(options::OPT_fsized_deallocation, 3887 options::OPT_fno_sized_deallocation, false)) 3888 CmdArgs.push_back("-fsized-deallocation"); 3889 3890 // -faligned-allocation is on by default in C++17 onwards and otherwise off 3891 // by default. 3892 if (Arg *A = Args.getLastArg(options::OPT_faligned_allocation, 3893 options::OPT_fno_aligned_allocation, 3894 options::OPT_faligned_new_EQ)) { 3895 if (A->getOption().matches(options::OPT_fno_aligned_allocation)) 3896 CmdArgs.push_back("-fno-aligned-allocation"); 3897 else 3898 CmdArgs.push_back("-faligned-allocation"); 3899 } 3900 3901 // The default new alignment can be specified using a dedicated option or via 3902 // a GCC-compatible option that also turns on aligned allocation. 3903 if (Arg *A = Args.getLastArg(options::OPT_fnew_alignment_EQ, 3904 options::OPT_faligned_new_EQ)) 3905 CmdArgs.push_back( 3906 Args.MakeArgString(Twine("-fnew-alignment=") + A->getValue())); 3907 3908 // -fconstant-cfstrings is default, and may be subject to argument translation 3909 // on Darwin. 3910 if (!Args.hasFlag(options::OPT_fconstant_cfstrings, 3911 options::OPT_fno_constant_cfstrings) || 3912 !Args.hasFlag(options::OPT_mconstant_cfstrings, 3913 options::OPT_mno_constant_cfstrings)) 3914 CmdArgs.push_back("-fno-constant-cfstrings"); 3915 3916 // -fshort-wchar default varies depending on platform; only 3917 // pass if specified. 3918 if (Arg *A = Args.getLastArg(options::OPT_fshort_wchar, 3919 options::OPT_fno_short_wchar)) 3920 A->render(Args, CmdArgs); 3921 3922 // -fno-pascal-strings is default, only pass non-default. 3923 if (Args.hasFlag(options::OPT_fpascal_strings, 3924 options::OPT_fno_pascal_strings, false)) 3925 CmdArgs.push_back("-fpascal-strings"); 3926 3927 // Honor -fpack-struct= and -fpack-struct, if given. Note that 3928 // -fno-pack-struct doesn't apply to -fpack-struct=. 3929 if (Arg *A = Args.getLastArg(options::OPT_fpack_struct_EQ)) { 3930 std::string PackStructStr = "-fpack-struct="; 3931 PackStructStr += A->getValue(); 3932 CmdArgs.push_back(Args.MakeArgString(PackStructStr)); 3933 } else if (Args.hasFlag(options::OPT_fpack_struct, 3934 options::OPT_fno_pack_struct, false)) { 3935 CmdArgs.push_back("-fpack-struct=1"); 3936 } 3937 3938 // Handle -fmax-type-align=N and -fno-type-align 3939 bool SkipMaxTypeAlign = Args.hasArg(options::OPT_fno_max_type_align); 3940 if (Arg *A = Args.getLastArg(options::OPT_fmax_type_align_EQ)) { 3941 if (!SkipMaxTypeAlign) { 3942 std::string MaxTypeAlignStr = "-fmax-type-align="; 3943 MaxTypeAlignStr += A->getValue(); 3944 CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr)); 3945 } 3946 } else if (getToolChain().getTriple().isOSDarwin()) { 3947 if (!SkipMaxTypeAlign) { 3948 std::string MaxTypeAlignStr = "-fmax-type-align=16"; 3949 CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr)); 3950 } 3951 } 3952 3953 // -fcommon is the default unless compiling kernel code or the target says so 3954 bool NoCommonDefault = 3955 KernelOrKext || isNoCommonDefault(getToolChain().getTriple()); 3956 if (!Args.hasFlag(options::OPT_fcommon, options::OPT_fno_common, 3957 !NoCommonDefault)) 3958 CmdArgs.push_back("-fno-common"); 3959 3960 // -fsigned-bitfields is default, and clang doesn't yet support 3961 // -funsigned-bitfields. 3962 if (!Args.hasFlag(options::OPT_fsigned_bitfields, 3963 options::OPT_funsigned_bitfields)) 3964 D.Diag(diag::warn_drv_clang_unsupported) 3965 << Args.getLastArg(options::OPT_funsigned_bitfields)->getAsString(Args); 3966 3967 // -fsigned-bitfields is default, and clang doesn't support -fno-for-scope. 3968 if (!Args.hasFlag(options::OPT_ffor_scope, options::OPT_fno_for_scope)) 3969 D.Diag(diag::err_drv_clang_unsupported) 3970 << Args.getLastArg(options::OPT_fno_for_scope)->getAsString(Args); 3971 3972 // -finput_charset=UTF-8 is default. Reject others 3973 if (Arg *inputCharset = Args.getLastArg(options::OPT_finput_charset_EQ)) { 3974 StringRef value = inputCharset->getValue(); 3975 if (!value.equals_lower("utf-8")) 3976 D.Diag(diag::err_drv_invalid_value) << inputCharset->getAsString(Args) 3977 << value; 3978 } 3979 3980 // -fexec_charset=UTF-8 is default. Reject others 3981 if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) { 3982 StringRef value = execCharset->getValue(); 3983 if (!value.equals_lower("utf-8")) 3984 D.Diag(diag::err_drv_invalid_value) << execCharset->getAsString(Args) 3985 << value; 3986 } 3987 3988 // -fcaret-diagnostics is default. 3989 if (!Args.hasFlag(options::OPT_fcaret_diagnostics, 3990 options::OPT_fno_caret_diagnostics, true)) 3991 CmdArgs.push_back("-fno-caret-diagnostics"); 3992 3993 // -fdiagnostics-fixit-info is default, only pass non-default. 3994 if (!Args.hasFlag(options::OPT_fdiagnostics_fixit_info, 3995 options::OPT_fno_diagnostics_fixit_info)) 3996 CmdArgs.push_back("-fno-diagnostics-fixit-info"); 3997 3998 // Enable -fdiagnostics-show-option by default. 3999 if (Args.hasFlag(options::OPT_fdiagnostics_show_option, 4000 options::OPT_fno_diagnostics_show_option)) 4001 CmdArgs.push_back("-fdiagnostics-show-option"); 4002 4003 if (const Arg *A = 4004 Args.getLastArg(options::OPT_fdiagnostics_show_category_EQ)) { 4005 CmdArgs.push_back("-fdiagnostics-show-category"); 4006 CmdArgs.push_back(A->getValue()); 4007 } 4008 4009 if (Args.hasFlag(options::OPT_fdiagnostics_show_hotness, 4010 options::OPT_fno_diagnostics_show_hotness, false)) 4011 CmdArgs.push_back("-fdiagnostics-show-hotness"); 4012 4013 if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_format_EQ)) { 4014 CmdArgs.push_back("-fdiagnostics-format"); 4015 CmdArgs.push_back(A->getValue()); 4016 } 4017 4018 if (Arg *A = Args.getLastArg( 4019 options::OPT_fdiagnostics_show_note_include_stack, 4020 options::OPT_fno_diagnostics_show_note_include_stack)) { 4021 if (A->getOption().matches( 4022 options::OPT_fdiagnostics_show_note_include_stack)) 4023 CmdArgs.push_back("-fdiagnostics-show-note-include-stack"); 4024 else 4025 CmdArgs.push_back("-fno-diagnostics-show-note-include-stack"); 4026 } 4027 4028 // Color diagnostics are parsed by the driver directly from argv 4029 // and later re-parsed to construct this job; claim any possible 4030 // color diagnostic here to avoid warn_drv_unused_argument and 4031 // diagnose bad OPT_fdiagnostics_color_EQ values. 4032 for (Arg *A : Args) { 4033 const Option &O = A->getOption(); 4034 if (!O.matches(options::OPT_fcolor_diagnostics) && 4035 !O.matches(options::OPT_fdiagnostics_color) && 4036 !O.matches(options::OPT_fno_color_diagnostics) && 4037 !O.matches(options::OPT_fno_diagnostics_color) && 4038 !O.matches(options::OPT_fdiagnostics_color_EQ)) 4039 continue; 4040 if (O.matches(options::OPT_fdiagnostics_color_EQ)) { 4041 StringRef Value(A->getValue()); 4042 if (Value != "always" && Value != "never" && Value != "auto") 4043 getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) 4044 << ("-fdiagnostics-color=" + Value).str(); 4045 } 4046 A->claim(); 4047 } 4048 if (D.getDiags().getDiagnosticOptions().ShowColors) 4049 CmdArgs.push_back("-fcolor-diagnostics"); 4050 4051 if (Args.hasArg(options::OPT_fansi_escape_codes)) 4052 CmdArgs.push_back("-fansi-escape-codes"); 4053 4054 if (!Args.hasFlag(options::OPT_fshow_source_location, 4055 options::OPT_fno_show_source_location)) 4056 CmdArgs.push_back("-fno-show-source-location"); 4057 4058 if (Args.hasArg(options::OPT_fdiagnostics_absolute_paths)) 4059 CmdArgs.push_back("-fdiagnostics-absolute-paths"); 4060 4061 if (!Args.hasFlag(options::OPT_fshow_column, options::OPT_fno_show_column, 4062 true)) 4063 CmdArgs.push_back("-fno-show-column"); 4064 4065 if (!Args.hasFlag(options::OPT_fspell_checking, 4066 options::OPT_fno_spell_checking)) 4067 CmdArgs.push_back("-fno-spell-checking"); 4068 4069 // -fno-asm-blocks is default. 4070 if (Args.hasFlag(options::OPT_fasm_blocks, options::OPT_fno_asm_blocks, 4071 false)) 4072 CmdArgs.push_back("-fasm-blocks"); 4073 4074 // -fgnu-inline-asm is default. 4075 if (!Args.hasFlag(options::OPT_fgnu_inline_asm, 4076 options::OPT_fno_gnu_inline_asm, true)) 4077 CmdArgs.push_back("-fno-gnu-inline-asm"); 4078 4079 // Enable vectorization per default according to the optimization level 4080 // selected. For optimization levels that want vectorization we use the alias 4081 // option to simplify the hasFlag logic. 4082 bool EnableVec = shouldEnableVectorizerAtOLevel(Args, false); 4083 OptSpecifier VectorizeAliasOption = 4084 EnableVec ? options::OPT_O_Group : options::OPT_fvectorize; 4085 if (Args.hasFlag(options::OPT_fvectorize, VectorizeAliasOption, 4086 options::OPT_fno_vectorize, EnableVec)) 4087 CmdArgs.push_back("-vectorize-loops"); 4088 4089 // -fslp-vectorize is enabled based on the optimization level selected. 4090 bool EnableSLPVec = shouldEnableVectorizerAtOLevel(Args, true); 4091 OptSpecifier SLPVectAliasOption = 4092 EnableSLPVec ? options::OPT_O_Group : options::OPT_fslp_vectorize; 4093 if (Args.hasFlag(options::OPT_fslp_vectorize, SLPVectAliasOption, 4094 options::OPT_fno_slp_vectorize, EnableSLPVec)) 4095 CmdArgs.push_back("-vectorize-slp"); 4096 4097 // -fno-slp-vectorize-aggressive is default. 4098 if (Args.hasFlag(options::OPT_fslp_vectorize_aggressive, 4099 options::OPT_fno_slp_vectorize_aggressive, false)) 4100 CmdArgs.push_back("-vectorize-slp-aggressive"); 4101 4102 if (Arg *A = Args.getLastArg(options::OPT_fshow_overloads_EQ)) 4103 A->render(Args, CmdArgs); 4104 4105 if (Arg *A = Args.getLastArg( 4106 options::OPT_fsanitize_undefined_strip_path_components_EQ)) 4107 A->render(Args, CmdArgs); 4108 4109 // -fdollars-in-identifiers default varies depending on platform and 4110 // language; only pass if specified. 4111 if (Arg *A = Args.getLastArg(options::OPT_fdollars_in_identifiers, 4112 options::OPT_fno_dollars_in_identifiers)) { 4113 if (A->getOption().matches(options::OPT_fdollars_in_identifiers)) 4114 CmdArgs.push_back("-fdollars-in-identifiers"); 4115 else 4116 CmdArgs.push_back("-fno-dollars-in-identifiers"); 4117 } 4118 4119 // -funit-at-a-time is default, and we don't support -fno-unit-at-a-time for 4120 // practical purposes. 4121 if (Arg *A = Args.getLastArg(options::OPT_funit_at_a_time, 4122 options::OPT_fno_unit_at_a_time)) { 4123 if (A->getOption().matches(options::OPT_fno_unit_at_a_time)) 4124 D.Diag(diag::warn_drv_clang_unsupported) << A->getAsString(Args); 4125 } 4126 4127 if (Args.hasFlag(options::OPT_fapple_pragma_pack, 4128 options::OPT_fno_apple_pragma_pack, false)) 4129 CmdArgs.push_back("-fapple-pragma-pack"); 4130 4131 // le32-specific flags: 4132 // -fno-math-builtin: clang should not convert math builtins to intrinsics 4133 // by default. 4134 if (getToolChain().getArch() == llvm::Triple::le32) { 4135 CmdArgs.push_back("-fno-math-builtin"); 4136 } 4137 4138 if (Args.hasFlag(options::OPT_fsave_optimization_record, 4139 options::OPT_fno_save_optimization_record, false)) { 4140 CmdArgs.push_back("-opt-record-file"); 4141 4142 const Arg *A = Args.getLastArg(options::OPT_foptimization_record_file_EQ); 4143 if (A) { 4144 CmdArgs.push_back(A->getValue()); 4145 } else { 4146 SmallString<128> F; 4147 if (Output.isFilename() && (Args.hasArg(options::OPT_c) || 4148 Args.hasArg(options::OPT_S))) { 4149 F = Output.getFilename(); 4150 } else { 4151 // Use the input filename. 4152 F = llvm::sys::path::stem(Input.getBaseInput()); 4153 4154 // If we're compiling for an offload architecture (i.e. a CUDA device), 4155 // we need to make the file name for the device compilation different 4156 // from the host compilation. 4157 if (!JA.isDeviceOffloading(Action::OFK_None) && 4158 !JA.isDeviceOffloading(Action::OFK_Host)) { 4159 llvm::sys::path::replace_extension(F, ""); 4160 F += Action::GetOffloadingFileNamePrefix(JA.getOffloadingDeviceKind(), 4161 Triple.normalize()); 4162 F += "-"; 4163 F += JA.getOffloadingArch(); 4164 } 4165 } 4166 4167 llvm::sys::path::replace_extension(F, "opt.yaml"); 4168 CmdArgs.push_back(Args.MakeArgString(F)); 4169 } 4170 } 4171 4172// Default to -fno-builtin-str{cat,cpy} on Darwin for ARM. 4173// 4174// FIXME: Now that PR4941 has been fixed this can be enabled. 4175#if 0 4176 if (getToolChain().getTriple().isOSDarwin() && 4177 (getToolChain().getArch() == llvm::Triple::arm || 4178 getToolChain().getArch() == llvm::Triple::thumb)) { 4179 if (!Args.hasArg(options::OPT_fbuiltin_strcat)) 4180 CmdArgs.push_back("-fno-builtin-strcat"); 4181 if (!Args.hasArg(options::OPT_fbuiltin_strcpy)) 4182 CmdArgs.push_back("-fno-builtin-strcpy"); 4183 } 4184#endif 4185 4186 // Enable rewrite includes if the user's asked for it or if we're generating 4187 // diagnostics. 4188 // TODO: Once -module-dependency-dir works with -frewrite-includes it'd be 4189 // nice to enable this when doing a crashdump for modules as well. 4190 if (Args.hasFlag(options::OPT_frewrite_includes, 4191 options::OPT_fno_rewrite_includes, false) || 4192 (C.isForDiagnostics() && !HaveAnyModules)) 4193 CmdArgs.push_back("-frewrite-includes"); 4194 4195 // Only allow -traditional or -traditional-cpp outside in preprocessing modes. 4196 if (Arg *A = Args.getLastArg(options::OPT_traditional, 4197 options::OPT_traditional_cpp)) { 4198 if (isa<PreprocessJobAction>(JA)) 4199 CmdArgs.push_back("-traditional-cpp"); 4200 else 4201 D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args); 4202 } 4203 4204 Args.AddLastArg(CmdArgs, options::OPT_dM); 4205 Args.AddLastArg(CmdArgs, options::OPT_dD); 4206 4207 // Handle serialized diagnostics. 4208 if (Arg *A = Args.getLastArg(options::OPT__serialize_diags)) { 4209 CmdArgs.push_back("-serialize-diagnostic-file"); 4210 CmdArgs.push_back(Args.MakeArgString(A->getValue())); 4211 } 4212 4213 if (Args.hasArg(options::OPT_fretain_comments_from_system_headers)) 4214 CmdArgs.push_back("-fretain-comments-from-system-headers"); 4215 4216 // Forward -fcomment-block-commands to -cc1. 4217 Args.AddAllArgs(CmdArgs, options::OPT_fcomment_block_commands); 4218 // Forward -fparse-all-comments to -cc1. 4219 Args.AddAllArgs(CmdArgs, options::OPT_fparse_all_comments); 4220 4221 // Turn -fplugin=name.so into -load name.so 4222 for (const Arg *A : Args.filtered(options::OPT_fplugin_EQ)) { 4223 CmdArgs.push_back("-load"); 4224 CmdArgs.push_back(A->getValue()); 4225 A->claim(); 4226 } 4227 4228 // Setup statistics file output. 4229 if (const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ)) { 4230 StringRef SaveStats = A->getValue(); 4231 4232 SmallString<128> StatsFile; 4233 bool DoSaveStats = false; 4234 if (SaveStats == "obj") { 4235 if (Output.isFilename()) { 4236 StatsFile.assign(Output.getFilename()); 4237 llvm::sys::path::remove_filename(StatsFile); 4238 } 4239 DoSaveStats = true; 4240 } else if (SaveStats == "cwd") { 4241 DoSaveStats = true; 4242 } else { 4243 D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats; 4244 } 4245 4246 if (DoSaveStats) { 4247 StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput()); 4248 llvm::sys::path::append(StatsFile, BaseName); 4249 llvm::sys::path::replace_extension(StatsFile, "stats"); 4250 CmdArgs.push_back(Args.MakeArgString(Twine("-stats-file=") + 4251 StatsFile)); 4252 } 4253 } 4254 4255 // Forward -Xclang arguments to -cc1, and -mllvm arguments to the LLVM option 4256 // parser. 4257 // -finclude-default-header flag is for preprocessor, 4258 // do not pass it to other cc1 commands when save-temps is enabled 4259 if (C.getDriver().isSaveTempsEnabled() && 4260 !isa<PreprocessJobAction>(JA)) { 4261 for (auto Arg : Args.filtered(options::OPT_Xclang)) { 4262 Arg->claim(); 4263 if (StringRef(Arg->getValue()) != "-finclude-default-header") 4264 CmdArgs.push_back(Arg->getValue()); 4265 } 4266 } 4267 else { 4268 Args.AddAllArgValues(CmdArgs, options::OPT_Xclang); 4269 } 4270 for (const Arg *A : Args.filtered(options::OPT_mllvm)) { 4271 A->claim(); 4272 4273 // We translate this by hand to the -cc1 argument, since nightly test uses 4274 // it and developers have been trained to spell it with -mllvm. Both 4275 // spellings are now deprecated and should be removed. 4276 if (StringRef(A->getValue(0)) == "-disable-llvm-optzns") { 4277 CmdArgs.push_back("-disable-llvm-optzns"); 4278 } else { 4279 A->render(Args, CmdArgs); 4280 } 4281 } 4282 4283 // With -save-temps, we want to save the unoptimized bitcode output from the 4284 // CompileJobAction, use -disable-llvm-passes to get pristine IR generated 4285 // by the frontend. 4286 // When -fembed-bitcode is enabled, optimized bitcode is emitted because it 4287 // has slightly different breakdown between stages. 4288 // FIXME: -fembed-bitcode -save-temps will save optimized bitcode instead of 4289 // pristine IR generated by the frontend. Ideally, a new compile action should 4290 // be added so both IR can be captured. 4291 if (C.getDriver().isSaveTempsEnabled() && 4292 !(C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO()) && 4293 isa<CompileJobAction>(JA)) 4294 CmdArgs.push_back("-disable-llvm-passes"); 4295 4296 if (Output.getType() == types::TY_Dependencies) { 4297 // Handled with other dependency code. 4298 } else if (Output.isFilename()) { 4299 CmdArgs.push_back("-o"); 4300 CmdArgs.push_back(Output.getFilename()); 4301 } else { 4302 assert(Output.isNothing() && "Invalid output."); 4303 } 4304 4305 addDashXForInput(Args, Input, CmdArgs); 4306 4307 if (Input.isFilename()) 4308 CmdArgs.push_back(Input.getFilename()); 4309 else 4310 Input.getInputArg().renderAsInput(Args, CmdArgs); 4311 4312 Args.AddAllArgs(CmdArgs, options::OPT_undef); 4313 4314 const char *Exec = getToolChain().getDriver().getClangProgramPath(); 4315 4316 // Optionally embed the -cc1 level arguments into the debug info, for build 4317 // analysis. 4318 // Also record command line arguments into the debug info if 4319 // -grecord-gcc-switches options is set on. 4320 // By default, -gno-record-gcc-switches is set on and no recording. 4321 if (getToolChain().UseDwarfDebugFlags() || 4322 Args.hasFlag(options::OPT_grecord_gcc_switches, 4323 options::OPT_gno_record_gcc_switches, false)) { 4324 ArgStringList OriginalArgs; 4325 for (const auto &Arg : Args) 4326 Arg->render(Args, OriginalArgs); 4327 4328 SmallString<256> Flags; 4329 Flags += Exec; 4330 for (const char *OriginalArg : OriginalArgs) { 4331 SmallString<128> EscapedArg; 4332 EscapeSpacesAndBackslashes(OriginalArg, EscapedArg); 4333 Flags += " "; 4334 Flags += EscapedArg; 4335 } 4336 CmdArgs.push_back("-dwarf-debug-flags"); 4337 CmdArgs.push_back(Args.MakeArgString(Flags)); 4338 } 4339 4340 // Add the split debug info name to the command lines here so we 4341 // can propagate it to the backend. 4342 bool SplitDwarf = SplitDwarfArg && getToolChain().getTriple().isOSLinux() && 4343 (isa<AssembleJobAction>(JA) || isa<CompileJobAction>(JA) || 4344 isa<BackendJobAction>(JA)); 4345 const char *SplitDwarfOut; 4346 if (SplitDwarf) { 4347 CmdArgs.push_back("-split-dwarf-file"); 4348 SplitDwarfOut = SplitDebugName(Args, Input); 4349 CmdArgs.push_back(SplitDwarfOut); 4350 } 4351 4352 // Host-side cuda compilation receives device-side outputs as Inputs[1...]. 4353 // Include them with -fcuda-include-gpubinary. 4354 if (IsCuda && Inputs.size() > 1) 4355 for (auto I = std::next(Inputs.begin()), E = Inputs.end(); I != E; ++I) { 4356 CmdArgs.push_back("-fcuda-include-gpubinary"); 4357 CmdArgs.push_back(I->getFilename()); 4358 } 4359 4360 // OpenMP offloading device jobs take the argument -fopenmp-host-ir-file-path 4361 // to specify the result of the compile phase on the host, so the meaningful 4362 // device declarations can be identified. Also, -fopenmp-is-device is passed 4363 // along to tell the frontend that it is generating code for a device, so that 4364 // only the relevant declarations are emitted. 4365 if (IsOpenMPDevice && Inputs.size() == 2) { 4366 CmdArgs.push_back("-fopenmp-is-device"); 4367 CmdArgs.push_back("-fopenmp-host-ir-file-path"); 4368 CmdArgs.push_back(Args.MakeArgString(Inputs.back().getFilename())); 4369 } 4370 4371 // For all the host OpenMP offloading compile jobs we need to pass the targets 4372 // information using -fopenmp-targets= option. 4373 if (isa<CompileJobAction>(JA) && JA.isHostOffloading(Action::OFK_OpenMP)) { 4374 SmallString<128> TargetInfo("-fopenmp-targets="); 4375 4376 Arg *Tgts = Args.getLastArg(options::OPT_fopenmp_targets_EQ); 4377 assert(Tgts && Tgts->getNumValues() && 4378 "OpenMP offloading has to have targets specified."); 4379 for (unsigned i = 0; i < Tgts->getNumValues(); ++i) { 4380 if (i) 4381 TargetInfo += ','; 4382 // We need to get the string from the triple because it may be not exactly 4383 // the same as the one we get directly from the arguments. 4384 llvm::Triple T(Tgts->getValue(i)); 4385 TargetInfo += T.getTriple(); 4386 } 4387 CmdArgs.push_back(Args.MakeArgString(TargetInfo.str())); 4388 } 4389 4390 bool WholeProgramVTables = 4391 Args.hasFlag(options::OPT_fwhole_program_vtables, 4392 options::OPT_fno_whole_program_vtables, false); 4393 if (WholeProgramVTables) { 4394 if (!D.isUsingLTO()) 4395 D.Diag(diag::err_drv_argument_only_allowed_with) 4396 << "-fwhole-program-vtables" 4397 << "-flto"; 4398 CmdArgs.push_back("-fwhole-program-vtables"); 4399 } 4400 4401 // Finally add the compile command to the compilation. 4402 if (Args.hasArg(options::OPT__SLASH_fallback) && 4403 Output.getType() == types::TY_Object && 4404 (InputType == types::TY_C || InputType == types::TY_CXX)) { 4405 auto CLCommand = 4406 getCLFallback()->GetCommand(C, JA, Output, Inputs, Args, LinkingOutput); 4407 C.addCommand(llvm::make_unique<FallbackCommand>( 4408 JA, *this, Exec, CmdArgs, Inputs, std::move(CLCommand))); 4409 } else if (Args.hasArg(options::OPT__SLASH_fallback) && 4410 isa<PrecompileJobAction>(JA)) { 4411 // In /fallback builds, run the main compilation even if the pch generation 4412 // fails, so that the main compilation's fallback to cl.exe runs. 4413 C.addCommand(llvm::make_unique<ForceSuccessCommand>(JA, *this, Exec, 4414 CmdArgs, Inputs)); 4415 } else { 4416 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs)); 4417 } 4418 4419 // Handle the debug info splitting at object creation time if we're 4420 // creating an object. 4421 // TODO: Currently only works on linux with newer objcopy. 4422 if (SplitDwarf && Output.getType() == types::TY_Object) 4423 SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output, SplitDwarfOut); 4424 4425 if (Arg *A = Args.getLastArg(options::OPT_pg)) 4426 if (Args.hasArg(options::OPT_fomit_frame_pointer)) 4427 D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer" 4428 << A->getAsString(Args); 4429 4430 // Claim some arguments which clang supports automatically. 4431 4432 // -fpch-preprocess is used with gcc to add a special marker in the output to 4433 // include the PCH file. Clang's PTH solution is completely transparent, so we 4434 // do not need to deal with it at all. 4435 Args.ClaimAllArgs(options::OPT_fpch_preprocess); 4436 4437 // Claim some arguments which clang doesn't support, but we don't 4438 // care to warn the user about. 4439 Args.ClaimAllArgs(options::OPT_clang_ignored_f_Group); 4440 Args.ClaimAllArgs(options::OPT_clang_ignored_m_Group); 4441 4442 // Disable warnings for clang -E -emit-llvm foo.c 4443 Args.ClaimAllArgs(options::OPT_emit_llvm); 4444} 4445 4446Clang::Clang(const ToolChain &TC) 4447 // CAUTION! The first constructor argument ("clang") is not arbitrary, 4448 // as it is for other tools. Some operations on a Tool actually test 4449 // whether that tool is Clang based on the Tool's Name as a string. 4450 : Tool("clang", "clang frontend", TC, RF_Full) {} 4451 4452Clang::~Clang() {} 4453 4454/// Add options related to the Objective-C runtime/ABI. 4455/// 4456/// Returns true if the runtime is non-fragile. 4457ObjCRuntime Clang::AddObjCRuntimeArgs(const ArgList &args, 4458 ArgStringList &cmdArgs, 4459 RewriteKind rewriteKind) const { 4460 // Look for the controlling runtime option. 4461 Arg *runtimeArg = 4462 args.getLastArg(options::OPT_fnext_runtime, options::OPT_fgnu_runtime, 4463 options::OPT_fobjc_runtime_EQ); 4464 4465 // Just forward -fobjc-runtime= to the frontend. This supercedes 4466 // options about fragility. 4467 if (runtimeArg && 4468 runtimeArg->getOption().matches(options::OPT_fobjc_runtime_EQ)) { 4469 ObjCRuntime runtime; 4470 StringRef value = runtimeArg->getValue(); 4471 if (runtime.tryParse(value)) { 4472 getToolChain().getDriver().Diag(diag::err_drv_unknown_objc_runtime) 4473 << value; 4474 } 4475 4476 runtimeArg->render(args, cmdArgs); 4477 return runtime; 4478 } 4479 4480 // Otherwise, we'll need the ABI "version". Version numbers are 4481 // slightly confusing for historical reasons: 4482 // 1 - Traditional "fragile" ABI 4483 // 2 - Non-fragile ABI, version 1 4484 // 3 - Non-fragile ABI, version 2 4485 unsigned objcABIVersion = 1; 4486 // If -fobjc-abi-version= is present, use that to set the version. 4487 if (Arg *abiArg = args.getLastArg(options::OPT_fobjc_abi_version_EQ)) { 4488 StringRef value = abiArg->getValue(); 4489 if (value == "1") 4490 objcABIVersion = 1; 4491 else if (value == "2") 4492 objcABIVersion = 2; 4493 else if (value == "3") 4494 objcABIVersion = 3; 4495 else 4496 getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) << value; 4497 } else { 4498 // Otherwise, determine if we are using the non-fragile ABI. 4499 bool nonFragileABIIsDefault = 4500 (rewriteKind == RK_NonFragile || 4501 (rewriteKind == RK_None && 4502 getToolChain().IsObjCNonFragileABIDefault())); 4503 if (args.hasFlag(options::OPT_fobjc_nonfragile_abi, 4504 options::OPT_fno_objc_nonfragile_abi, 4505 nonFragileABIIsDefault)) { 4506// Determine the non-fragile ABI version to use. 4507#ifdef DISABLE_DEFAULT_NONFRAGILEABI_TWO 4508 unsigned nonFragileABIVersion = 1; 4509#else 4510 unsigned nonFragileABIVersion = 2; 4511#endif 4512 4513 if (Arg *abiArg = 4514 args.getLastArg(options::OPT_fobjc_nonfragile_abi_version_EQ)) { 4515 StringRef value = abiArg->getValue(); 4516 if (value == "1") 4517 nonFragileABIVersion = 1; 4518 else if (value == "2") 4519 nonFragileABIVersion = 2; 4520 else 4521 getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) 4522 << value; 4523 } 4524 4525 objcABIVersion = 1 + nonFragileABIVersion; 4526 } else { 4527 objcABIVersion = 1; 4528 } 4529 } 4530 4531 // We don't actually care about the ABI version other than whether 4532 // it's non-fragile. 4533 bool isNonFragile = objcABIVersion != 1; 4534 4535 // If we have no runtime argument, ask the toolchain for its default runtime. 4536 // However, the rewriter only really supports the Mac runtime, so assume that. 4537 ObjCRuntime runtime; 4538 if (!runtimeArg) { 4539 switch (rewriteKind) { 4540 case RK_None: 4541 runtime = getToolChain().getDefaultObjCRuntime(isNonFragile); 4542 break; 4543 case RK_Fragile: 4544 runtime = ObjCRuntime(ObjCRuntime::FragileMacOSX, VersionTuple()); 4545 break; 4546 case RK_NonFragile: 4547 runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple()); 4548 break; 4549 } 4550 4551 // -fnext-runtime 4552 } else if (runtimeArg->getOption().matches(options::OPT_fnext_runtime)) { 4553 // On Darwin, make this use the default behavior for the toolchain. 4554 if (getToolChain().getTriple().isOSDarwin()) { 4555 runtime = getToolChain().getDefaultObjCRuntime(isNonFragile); 4556 4557 // Otherwise, build for a generic macosx port. 4558 } else { 4559 runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple()); 4560 } 4561 4562 // -fgnu-runtime 4563 } else { 4564 assert(runtimeArg->getOption().matches(options::OPT_fgnu_runtime)); 4565 // Legacy behaviour is to target the gnustep runtime if we are in 4566 // non-fragile mode or the GCC runtime in fragile mode. 4567 if (isNonFragile) 4568 runtime = ObjCRuntime(ObjCRuntime::GNUstep, VersionTuple(1, 6)); 4569 else 4570 runtime = ObjCRuntime(ObjCRuntime::GCC, VersionTuple()); 4571 } 4572 4573 cmdArgs.push_back( 4574 args.MakeArgString("-fobjc-runtime=" + runtime.getAsString())); 4575 return runtime; 4576} 4577 4578static bool maybeConsumeDash(const std::string &EH, size_t &I) { 4579 bool HaveDash = (I + 1 < EH.size() && EH[I + 1] == '-'); 4580 I += HaveDash; 4581 return !HaveDash; 4582} 4583 4584namespace { 4585struct EHFlags { 4586 bool Synch = false; 4587 bool Asynch = false; 4588 bool NoUnwindC = false; 4589}; 4590} // end anonymous namespace 4591 4592/// /EH controls whether to run destructor cleanups when exceptions are 4593/// thrown. There are three modifiers: 4594/// - s: Cleanup after "synchronous" exceptions, aka C++ exceptions. 4595/// - a: Cleanup after "asynchronous" exceptions, aka structured exceptions. 4596/// The 'a' modifier is unimplemented and fundamentally hard in LLVM IR. 4597/// - c: Assume that extern "C" functions are implicitly nounwind. 4598/// The default is /EHs-c-, meaning cleanups are disabled. 4599static EHFlags parseClangCLEHFlags(const Driver &D, const ArgList &Args) { 4600 EHFlags EH; 4601 4602 std::vector<std::string> EHArgs = 4603 Args.getAllArgValues(options::OPT__SLASH_EH); 4604 for (auto EHVal : EHArgs) { 4605 for (size_t I = 0, E = EHVal.size(); I != E; ++I) { 4606 switch (EHVal[I]) { 4607 case 'a': 4608 EH.Asynch = maybeConsumeDash(EHVal, I); 4609 if (EH.Asynch) 4610 EH.Synch = false; 4611 continue; 4612 case 'c': 4613 EH.NoUnwindC = maybeConsumeDash(EHVal, I); 4614 continue; 4615 case 's': 4616 EH.Synch = maybeConsumeDash(EHVal, I); 4617 if (EH.Synch) 4618 EH.Asynch = false; 4619 continue; 4620 default: 4621 break; 4622 } 4623 D.Diag(clang::diag::err_drv_invalid_value) << "/EH" << EHVal; 4624 break; 4625 } 4626 } 4627 // The /GX, /GX- flags are only processed if there are not /EH flags. 4628 // The default is that /GX is not specified. 4629 if (EHArgs.empty() && 4630 Args.hasFlag(options::OPT__SLASH_GX, options::OPT__SLASH_GX_, 4631 /*default=*/false)) { 4632 EH.Synch = true; 4633 EH.NoUnwindC = true; 4634 } 4635 4636 return EH; 4637} 4638 4639void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType, 4640 ArgStringList &CmdArgs, 4641 codegenoptions::DebugInfoKind *DebugInfoKind, 4642 bool *EmitCodeView) const { 4643 unsigned RTOptionID = options::OPT__SLASH_MT; 4644 4645 if (Args.hasArg(options::OPT__SLASH_LDd)) 4646 // The /LDd option implies /MTd. The dependent lib part can be overridden, 4647 // but defining _DEBUG is sticky. 4648 RTOptionID = options::OPT__SLASH_MTd; 4649 4650 if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group)) 4651 RTOptionID = A->getOption().getID(); 4652 4653 StringRef FlagForCRT; 4654 switch (RTOptionID) { 4655 case options::OPT__SLASH_MD: 4656 if (Args.hasArg(options::OPT__SLASH_LDd)) 4657 CmdArgs.push_back("-D_DEBUG"); 4658 CmdArgs.push_back("-D_MT"); 4659 CmdArgs.push_back("-D_DLL"); 4660 FlagForCRT = "--dependent-lib=msvcrt"; 4661 break; 4662 case options::OPT__SLASH_MDd: 4663 CmdArgs.push_back("-D_DEBUG"); 4664 CmdArgs.push_back("-D_MT"); 4665 CmdArgs.push_back("-D_DLL"); 4666 FlagForCRT = "--dependent-lib=msvcrtd"; 4667 break; 4668 case options::OPT__SLASH_MT: 4669 if (Args.hasArg(options::OPT__SLASH_LDd)) 4670 CmdArgs.push_back("-D_DEBUG"); 4671 CmdArgs.push_back("-D_MT"); 4672 CmdArgs.push_back("-flto-visibility-public-std"); 4673 FlagForCRT = "--dependent-lib=libcmt"; 4674 break; 4675 case options::OPT__SLASH_MTd: 4676 CmdArgs.push_back("-D_DEBUG"); 4677 CmdArgs.push_back("-D_MT"); 4678 CmdArgs.push_back("-flto-visibility-public-std"); 4679 FlagForCRT = "--dependent-lib=libcmtd"; 4680 break; 4681 default: 4682 llvm_unreachable("Unexpected option ID."); 4683 } 4684 4685 if (Args.hasArg(options::OPT__SLASH_Zl)) { 4686 CmdArgs.push_back("-D_VC_NODEFAULTLIB"); 4687 } else { 4688 CmdArgs.push_back(FlagForCRT.data()); 4689 4690 // This provides POSIX compatibility (maps 'open' to '_open'), which most 4691 // users want. The /Za flag to cl.exe turns this off, but it's not 4692 // implemented in clang. 4693 CmdArgs.push_back("--dependent-lib=oldnames"); 4694 } 4695 4696 // Both /showIncludes and /E (and /EP) write to stdout. Allowing both 4697 // would produce interleaved output, so ignore /showIncludes in such cases. 4698 if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_EP)) 4699 if (Arg *A = Args.getLastArg(options::OPT_show_includes)) 4700 A->render(Args, CmdArgs); 4701 4702 // This controls whether or not we emit RTTI data for polymorphic types. 4703 if (Args.hasFlag(options::OPT__SLASH_GR_, options::OPT__SLASH_GR, 4704 /*default=*/false)) 4705 CmdArgs.push_back("-fno-rtti-data"); 4706 4707 // This controls whether or not we emit stack-protector instrumentation. 4708 // In MSVC, Buffer Security Check (/GS) is on by default. 4709 if (Args.hasFlag(options::OPT__SLASH_GS, options::OPT__SLASH_GS_, 4710 /*default=*/true)) { 4711 CmdArgs.push_back("-stack-protector"); 4712 CmdArgs.push_back(Args.MakeArgString(Twine(LangOptions::SSPStrong))); 4713 } 4714 4715 // Emit CodeView if -Z7, -Zd, or -gline-tables-only are present. 4716 if (Arg *DebugInfoArg = 4717 Args.getLastArg(options::OPT__SLASH_Z7, options::OPT__SLASH_Zd, 4718 options::OPT_gline_tables_only)) { 4719 *EmitCodeView = true; 4720 if (DebugInfoArg->getOption().matches(options::OPT__SLASH_Z7)) 4721 *DebugInfoKind = codegenoptions::LimitedDebugInfo; 4722 else 4723 *DebugInfoKind = codegenoptions::DebugLineTablesOnly; 4724 CmdArgs.push_back("-gcodeview"); 4725 } else { 4726 *EmitCodeView = false; 4727 } 4728 4729 const Driver &D = getToolChain().getDriver(); 4730 EHFlags EH = parseClangCLEHFlags(D, Args); 4731 if (EH.Synch || EH.Asynch) { 4732 if (types::isCXX(InputType)) 4733 CmdArgs.push_back("-fcxx-exceptions"); 4734 CmdArgs.push_back("-fexceptions"); 4735 } 4736 if (types::isCXX(InputType) && EH.Synch && EH.NoUnwindC) 4737 CmdArgs.push_back("-fexternc-nounwind"); 4738 4739 // /EP should expand to -E -P. 4740 if (Args.hasArg(options::OPT__SLASH_EP)) { 4741 CmdArgs.push_back("-E"); 4742 CmdArgs.push_back("-P"); 4743 } 4744 4745 unsigned VolatileOptionID; 4746 if (getToolChain().getArch() == llvm::Triple::x86_64 || 4747 getToolChain().getArch() == llvm::Triple::x86) 4748 VolatileOptionID = options::OPT__SLASH_volatile_ms; 4749 else 4750 VolatileOptionID = options::OPT__SLASH_volatile_iso; 4751 4752 if (Arg *A = Args.getLastArg(options::OPT__SLASH_volatile_Group)) 4753 VolatileOptionID = A->getOption().getID(); 4754 4755 if (VolatileOptionID == options::OPT__SLASH_volatile_ms) 4756 CmdArgs.push_back("-fms-volatile"); 4757 4758 Arg *MostGeneralArg = Args.getLastArg(options::OPT__SLASH_vmg); 4759 Arg *BestCaseArg = Args.getLastArg(options::OPT__SLASH_vmb); 4760 if (MostGeneralArg && BestCaseArg) 4761 D.Diag(clang::diag::err_drv_argument_not_allowed_with) 4762 << MostGeneralArg->getAsString(Args) << BestCaseArg->getAsString(Args); 4763 4764 if (MostGeneralArg) { 4765 Arg *SingleArg = Args.getLastArg(options::OPT__SLASH_vms); 4766 Arg *MultipleArg = Args.getLastArg(options::OPT__SLASH_vmm); 4767 Arg *VirtualArg = Args.getLastArg(options::OPT__SLASH_vmv); 4768 4769 Arg *FirstConflict = SingleArg ? SingleArg : MultipleArg; 4770 Arg *SecondConflict = VirtualArg ? VirtualArg : MultipleArg; 4771 if (FirstConflict && SecondConflict && FirstConflict != SecondConflict) 4772 D.Diag(clang::diag::err_drv_argument_not_allowed_with) 4773 << FirstConflict->getAsString(Args) 4774 << SecondConflict->getAsString(Args); 4775 4776 if (SingleArg) 4777 CmdArgs.push_back("-fms-memptr-rep=single"); 4778 else if (MultipleArg) 4779 CmdArgs.push_back("-fms-memptr-rep=multiple"); 4780 else 4781 CmdArgs.push_back("-fms-memptr-rep=virtual"); 4782 } 4783 4784 if (Args.getLastArg(options::OPT__SLASH_Gd)) 4785 CmdArgs.push_back("-fdefault-calling-conv=cdecl"); 4786 else if (Args.getLastArg(options::OPT__SLASH_Gr)) 4787 CmdArgs.push_back("-fdefault-calling-conv=fastcall"); 4788 else if (Args.getLastArg(options::OPT__SLASH_Gz)) 4789 CmdArgs.push_back("-fdefault-calling-conv=stdcall"); 4790 else if (Args.getLastArg(options::OPT__SLASH_Gv)) 4791 CmdArgs.push_back("-fdefault-calling-conv=vectorcall"); 4792 4793 if (Arg *A = Args.getLastArg(options::OPT_vtordisp_mode_EQ)) 4794 A->render(Args, CmdArgs); 4795 4796 if (!Args.hasArg(options::OPT_fdiagnostics_format_EQ)) { 4797 CmdArgs.push_back("-fdiagnostics-format"); 4798 if (Args.hasArg(options::OPT__SLASH_fallback)) 4799 CmdArgs.push_back("msvc-fallback"); 4800 else 4801 CmdArgs.push_back("msvc"); 4802 } 4803} 4804 4805visualstudio::Compiler *Clang::getCLFallback() const { 4806 if (!CLFallback) 4807 CLFallback.reset(new visualstudio::Compiler(getToolChain())); 4808 return CLFallback.get(); 4809} 4810 4811 4812const char *Clang::getBaseInputName(const ArgList &Args, 4813 const InputInfo &Input) { 4814 return Args.MakeArgString(llvm::sys::path::filename(Input.getBaseInput())); 4815} 4816 4817const char *Clang::getBaseInputStem(const ArgList &Args, 4818 const InputInfoList &Inputs) { 4819 const char *Str = getBaseInputName(Args, Inputs[0]); 4820 4821 if (const char *End = strrchr(Str, '.')) 4822 return Args.MakeArgString(std::string(Str, End)); 4823 4824 return Str; 4825} 4826 4827const char *Clang::getDependencyFileName(const ArgList &Args, 4828 const InputInfoList &Inputs) { 4829 // FIXME: Think about this more. 4830 std::string Res; 4831 4832 if (Arg *OutputOpt = Args.getLastArg(options::OPT_o)) { 4833 std::string Str(OutputOpt->getValue()); 4834 Res = Str.substr(0, Str.rfind('.')); 4835 } else { 4836 Res = getBaseInputStem(Args, Inputs); 4837 } 4838 return Args.MakeArgString(Res + ".d"); 4839} 4840 4841// Begin ClangAs 4842 4843void ClangAs::AddMIPSTargetArgs(const ArgList &Args, 4844 ArgStringList &CmdArgs) const { 4845 StringRef CPUName; 4846 StringRef ABIName; 4847 const llvm::Triple &Triple = getToolChain().getTriple(); 4848 mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName); 4849 4850 CmdArgs.push_back("-target-abi"); 4851 CmdArgs.push_back(ABIName.data()); 4852} 4853 4854void ClangAs::AddX86TargetArgs(const ArgList &Args, 4855 ArgStringList &CmdArgs) const { 4856 if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) { 4857 StringRef Value = A->getValue(); 4858 if (Value == "intel" || Value == "att") { 4859 CmdArgs.push_back("-mllvm"); 4860 CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value)); 4861 } else { 4862 getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument) 4863 << A->getOption().getName() << Value; 4864 } 4865 } 4866} 4867 4868void ClangAs::ConstructJob(Compilation &C, const JobAction &JA, 4869 const InputInfo &Output, const InputInfoList &Inputs, 4870 const ArgList &Args, 4871 const char *LinkingOutput) const { 4872 ArgStringList CmdArgs; 4873 4874 assert(Inputs.size() == 1 && "Unexpected number of inputs."); 4875 const InputInfo &Input = Inputs[0]; 4876 4877 const llvm::Triple &Triple = getToolChain().getEffectiveTriple(); 4878 const std::string &TripleStr = Triple.getTriple(); 4879 4880 // Don't warn about "clang -w -c foo.s" 4881 Args.ClaimAllArgs(options::OPT_w); 4882 // and "clang -emit-llvm -c foo.s" 4883 Args.ClaimAllArgs(options::OPT_emit_llvm); 4884 4885 claimNoWarnArgs(Args); 4886 4887 // Invoke ourselves in -cc1as mode. 4888 // 4889 // FIXME: Implement custom jobs for internal actions. 4890 CmdArgs.push_back("-cc1as"); 4891 4892 // Add the "effective" target triple. 4893 CmdArgs.push_back("-triple"); 4894 CmdArgs.push_back(Args.MakeArgString(TripleStr)); 4895 4896 // Set the output mode, we currently only expect to be used as a real 4897 // assembler. 4898 CmdArgs.push_back("-filetype"); 4899 CmdArgs.push_back("obj"); 4900 4901 // Set the main file name, so that debug info works even with 4902 // -save-temps or preprocessed assembly. 4903 CmdArgs.push_back("-main-file-name"); 4904 CmdArgs.push_back(Clang::getBaseInputName(Args, Input)); 4905 4906 // Add the target cpu 4907 std::string CPU = getCPUName(Args, Triple, /*FromAs*/ true); 4908 if (!CPU.empty()) { 4909 CmdArgs.push_back("-target-cpu"); 4910 CmdArgs.push_back(Args.MakeArgString(CPU)); 4911 } 4912 4913 // Add the target features 4914 getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, true); 4915 4916 // Ignore explicit -force_cpusubtype_ALL option. 4917 (void)Args.hasArg(options::OPT_force__cpusubtype__ALL); 4918 4919 // Pass along any -I options so we get proper .include search paths. 4920 Args.AddAllArgs(CmdArgs, options::OPT_I_Group); 4921 4922 // Determine the original source input. 4923 const Action *SourceAction = &JA; 4924 while (SourceAction->getKind() != Action::InputClass) { 4925 assert(!SourceAction->getInputs().empty() && "unexpected root action!"); 4926 SourceAction = SourceAction->getInputs()[0]; 4927 } 4928 4929 // Forward -g and handle debug info related flags, assuming we are dealing 4930 // with an actual assembly file. 4931 bool WantDebug = false; 4932 unsigned DwarfVersion = 0; 4933 Args.ClaimAllArgs(options::OPT_g_Group); 4934 if (Arg *A = Args.getLastArg(options::OPT_g_Group)) { 4935 WantDebug = !A->getOption().matches(options::OPT_g0) && 4936 !A->getOption().matches(options::OPT_ggdb0); 4937 if (WantDebug) 4938 DwarfVersion = DwarfVersionNum(A->getSpelling()); 4939 } 4940 if (DwarfVersion == 0) 4941 DwarfVersion = getToolChain().GetDefaultDwarfVersion(); 4942 4943 codegenoptions::DebugInfoKind DebugInfoKind = codegenoptions::NoDebugInfo; 4944 4945 if (SourceAction->getType() == types::TY_Asm || 4946 SourceAction->getType() == types::TY_PP_Asm) { 4947 // You might think that it would be ok to set DebugInfoKind outside of 4948 // the guard for source type, however there is a test which asserts 4949 // that some assembler invocation receives no -debug-info-kind, 4950 // and it's not clear whether that test is just overly restrictive. 4951 DebugInfoKind = (WantDebug ? codegenoptions::LimitedDebugInfo 4952 : codegenoptions::NoDebugInfo); 4953 // Add the -fdebug-compilation-dir flag if needed. 4954 addDebugCompDirArg(Args, CmdArgs); 4955 4956 // Set the AT_producer to the clang version when using the integrated 4957 // assembler on assembly source files. 4958 CmdArgs.push_back("-dwarf-debug-producer"); 4959 CmdArgs.push_back(Args.MakeArgString(getClangFullVersion())); 4960 4961 // And pass along -I options 4962 Args.AddAllArgs(CmdArgs, options::OPT_I); 4963 } 4964 RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion, 4965 llvm::DebuggerKind::Default); 4966 4967 // Handle -fPIC et al -- the relocation-model affects the assembler 4968 // for some targets. 4969 llvm::Reloc::Model RelocationModel; 4970 unsigned PICLevel; 4971 bool IsPIE; 4972 std::tie(RelocationModel, PICLevel, IsPIE) = 4973 ParsePICArgs(getToolChain(), Args); 4974 4975 const char *RMName = RelocationModelName(RelocationModel); 4976 if (RMName) { 4977 CmdArgs.push_back("-mrelocation-model"); 4978 CmdArgs.push_back(RMName); 4979 } 4980 4981 // Optionally embed the -cc1as level arguments into the debug info, for build 4982 // analysis. 4983 if (getToolChain().UseDwarfDebugFlags()) { 4984 ArgStringList OriginalArgs; 4985 for (const auto &Arg : Args) 4986 Arg->render(Args, OriginalArgs); 4987 4988 SmallString<256> Flags; 4989 const char *Exec = getToolChain().getDriver().getClangProgramPath(); 4990 Flags += Exec; 4991 for (const char *OriginalArg : OriginalArgs) { 4992 SmallString<128> EscapedArg; 4993 EscapeSpacesAndBackslashes(OriginalArg, EscapedArg); 4994 Flags += " "; 4995 Flags += EscapedArg; 4996 } 4997 CmdArgs.push_back("-dwarf-debug-flags"); 4998 CmdArgs.push_back(Args.MakeArgString(Flags)); 4999 } 5000 5001 // FIXME: Add -static support, once we have it. 5002 5003 // Add target specific flags. 5004 switch (getToolChain().getArch()) { 5005 default: 5006 break; 5007 5008 case llvm::Triple::mips: 5009 case llvm::Triple::mipsel: 5010 case llvm::Triple::mips64: 5011 case llvm::Triple::mips64el: 5012 AddMIPSTargetArgs(Args, CmdArgs); 5013 break; 5014 5015 case llvm::Triple::x86: 5016 case llvm::Triple::x86_64: 5017 AddX86TargetArgs(Args, CmdArgs); 5018 break; 5019 5020 case llvm::Triple::arm: 5021 case llvm::Triple::armeb: 5022 case llvm::Triple::thumb: 5023 case llvm::Triple::thumbeb: 5024 // This isn't in AddARMTargetArgs because we want to do this for assembly 5025 // only, not C/C++. 5026 if (Args.hasFlag(options::OPT_mdefault_build_attributes, 5027 options::OPT_mno_default_build_attributes, true)) { 5028 CmdArgs.push_back("-mllvm"); 5029 CmdArgs.push_back("-arm-add-build-attributes"); 5030 } 5031 break; 5032 } 5033 5034 // Consume all the warning flags. Usually this would be handled more 5035 // gracefully by -cc1 (warning about unknown warning flags, etc) but -cc1as 5036 // doesn't handle that so rather than warning about unused flags that are 5037 // actually used, we'll lie by omission instead. 5038 // FIXME: Stop lying and consume only the appropriate driver flags 5039 Args.ClaimAllArgs(options::OPT_W_Group); 5040 5041 CollectArgsForIntegratedAssembler(C, Args, CmdArgs, 5042 getToolChain().getDriver()); 5043 5044 Args.AddAllArgs(CmdArgs, options::OPT_mllvm); 5045 5046 assert(Output.isFilename() && "Unexpected lipo output."); 5047 CmdArgs.push_back("-o"); 5048 CmdArgs.push_back(Output.getFilename()); 5049 5050 assert(Input.isFilename() && "Invalid input."); 5051 CmdArgs.push_back(Input.getFilename()); 5052 5053 const char *Exec = getToolChain().getDriver().getClangProgramPath(); 5054 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs)); 5055 5056 // Handle the debug info splitting at object creation time if we're 5057 // creating an object. 5058 // TODO: Currently only works on linux with newer objcopy. 5059 if (Args.hasArg(options::OPT_gsplit_dwarf) && 5060 getToolChain().getTriple().isOSLinux()) 5061 SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output, 5062 SplitDebugName(Args, Input)); 5063} 5064 5065// Begin OffloadBundler 5066 5067void OffloadBundler::ConstructJob(Compilation &C, const JobAction &JA, 5068 const InputInfo &Output, 5069 const InputInfoList &Inputs, 5070 const llvm::opt::ArgList &TCArgs, 5071 const char *LinkingOutput) const { 5072 // The version with only one output is expected to refer to a bundling job. 5073 assert(isa<OffloadBundlingJobAction>(JA) && "Expecting bundling job!"); 5074 5075 // The bundling command looks like this: 5076 // clang-offload-bundler -type=bc 5077 // -targets=host-triple,openmp-triple1,openmp-triple2 5078 // -outputs=input_file 5079 // -inputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2" 5080 5081 ArgStringList CmdArgs; 5082 5083 // Get the type. 5084 CmdArgs.push_back(TCArgs.MakeArgString( 5085 Twine("-type=") + types::getTypeTempSuffix(Output.getType()))); 5086 5087 assert(JA.getInputs().size() == Inputs.size() && 5088 "Not have inputs for all dependence actions??"); 5089 5090 // Get the targets. 5091 SmallString<128> Triples; 5092 Triples += "-targets="; 5093 for (unsigned I = 0; I < Inputs.size(); ++I) { 5094 if (I) 5095 Triples += ','; 5096 5097 Action::OffloadKind CurKind = Action::OFK_Host; 5098 const ToolChain *CurTC = &getToolChain(); 5099 const Action *CurDep = JA.getInputs()[I]; 5100 5101 if (const auto *OA = dyn_cast<OffloadAction>(CurDep)) { 5102 OA->doOnEachDependence([&](Action *A, const ToolChain *TC, const char *) { 5103 CurKind = A->getOffloadingDeviceKind(); 5104 CurTC = TC; 5105 }); 5106 } 5107 Triples += Action::GetOffloadKindName(CurKind); 5108 Triples += '-'; 5109 Triples += CurTC->getTriple().normalize(); 5110 } 5111 CmdArgs.push_back(TCArgs.MakeArgString(Triples)); 5112 5113 // Get bundled file command. 5114 CmdArgs.push_back( 5115 TCArgs.MakeArgString(Twine("-outputs=") + Output.getFilename())); 5116 5117 // Get unbundled files command. 5118 SmallString<128> UB; 5119 UB += "-inputs="; 5120 for (unsigned I = 0; I < Inputs.size(); ++I) { 5121 if (I) 5122 UB += ','; 5123 UB += Inputs[I].getFilename(); 5124 } 5125 CmdArgs.push_back(TCArgs.MakeArgString(UB)); 5126 5127 // All the inputs are encoded as commands. 5128 C.addCommand(llvm::make_unique<Command>( 5129 JA, *this, 5130 TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())), 5131 CmdArgs, None)); 5132} 5133 5134void OffloadBundler::ConstructJobMultipleOutputs( 5135 Compilation &C, const JobAction &JA, const InputInfoList &Outputs, 5136 const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, 5137 const char *LinkingOutput) const { 5138 // The version with multiple outputs is expected to refer to a unbundling job. 5139 auto &UA = cast<OffloadUnbundlingJobAction>(JA); 5140 5141 // The unbundling command looks like this: 5142 // clang-offload-bundler -type=bc 5143 // -targets=host-triple,openmp-triple1,openmp-triple2 5144 // -inputs=input_file 5145 // -outputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2" 5146 // -unbundle 5147 5148 ArgStringList CmdArgs; 5149 5150 assert(Inputs.size() == 1 && "Expecting to unbundle a single file!"); 5151 InputInfo Input = Inputs.front(); 5152 5153 // Get the type. 5154 CmdArgs.push_back(TCArgs.MakeArgString( 5155 Twine("-type=") + types::getTypeTempSuffix(Input.getType()))); 5156 5157 // Get the targets. 5158 SmallString<128> Triples; 5159 Triples += "-targets="; 5160 auto DepInfo = UA.getDependentActionsInfo(); 5161 for (unsigned I = 0; I < DepInfo.size(); ++I) { 5162 if (I) 5163 Triples += ','; 5164 5165 auto &Dep = DepInfo[I]; 5166 Triples += Action::GetOffloadKindName(Dep.DependentOffloadKind); 5167 Triples += '-'; 5168 Triples += Dep.DependentToolChain->getTriple().normalize(); 5169 } 5170 5171 CmdArgs.push_back(TCArgs.MakeArgString(Triples)); 5172 5173 // Get bundled file command. 5174 CmdArgs.push_back( 5175 TCArgs.MakeArgString(Twine("-inputs=") + Input.getFilename())); 5176 5177 // Get unbundled files command. 5178 SmallString<128> UB; 5179 UB += "-outputs="; 5180 for (unsigned I = 0; I < Outputs.size(); ++I) { 5181 if (I) 5182 UB += ','; 5183 UB += Outputs[I].getFilename(); 5184 } 5185 CmdArgs.push_back(TCArgs.MakeArgString(UB)); 5186 CmdArgs.push_back("-unbundle"); 5187 5188 // All the inputs are encoded as commands. 5189 C.addCommand(llvm::make_unique<Command>( 5190 JA, *this, 5191 TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())), 5192 CmdArgs, None)); 5193} 5194