1//===- ToolChain.h - Collections of tools for one platform ------*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#ifndef LLVM_CLANG_DRIVER_TOOLCHAIN_H 10#define LLVM_CLANG_DRIVER_TOOLCHAIN_H 11 12#include "clang/Basic/DebugInfoOptions.h" 13#include "clang/Basic/LLVM.h" 14#include "clang/Basic/LangOptions.h" 15#include "clang/Basic/Sanitizers.h" 16#include "clang/Driver/Action.h" 17#include "clang/Driver/Multilib.h" 18#include "clang/Driver/Types.h" 19#include "llvm/ADT/APFloat.h" 20#include "llvm/ADT/ArrayRef.h" 21#include "llvm/ADT/FloatingPointMode.h" 22#include "llvm/ADT/SmallVector.h" 23#include "llvm/ADT/StringRef.h" 24#include "llvm/ADT/Triple.h" 25#include "llvm/MC/MCTargetOptions.h" 26#include "llvm/Option/Option.h" 27#include "llvm/Support/VersionTuple.h" 28#include "llvm/Target/TargetOptions.h" 29#include <cassert> 30#include <memory> 31#include <string> 32#include <utility> 33 34namespace llvm { 35namespace opt { 36 37class Arg; 38class ArgList; 39class DerivedArgList; 40 41} // namespace opt 42namespace vfs { 43 44class FileSystem; 45 46} // namespace vfs 47} // namespace llvm 48 49namespace clang { 50 51class ObjCRuntime; 52 53namespace driver { 54 55class Driver; 56class InputInfo; 57class SanitizerArgs; 58class Tool; 59class XRayArgs; 60 61/// Helper structure used to pass information extracted from clang executable 62/// name such as `i686-linux-android-g++`. 63struct ParsedClangName { 64 /// Target part of the executable name, as `i686-linux-android`. 65 std::string TargetPrefix; 66 67 /// Driver mode part of the executable name, as `g++`. 68 std::string ModeSuffix; 69 70 /// Corresponding driver mode argument, as '--driver-mode=g++' 71 const char *DriverMode = nullptr; 72 73 /// True if TargetPrefix is recognized as a registered target name. 74 bool TargetIsValid = false; 75 76 ParsedClangName() = default; 77 ParsedClangName(std::string Suffix, const char *Mode) 78 : ModeSuffix(Suffix), DriverMode(Mode) {} 79 ParsedClangName(std::string Target, std::string Suffix, const char *Mode, 80 bool IsRegistered) 81 : TargetPrefix(Target), ModeSuffix(Suffix), DriverMode(Mode), 82 TargetIsValid(IsRegistered) {} 83 84 bool isEmpty() const { 85 return TargetPrefix.empty() && ModeSuffix.empty() && DriverMode == nullptr; 86 } 87}; 88 89/// ToolChain - Access to tools for a single platform. 90class ToolChain { 91public: 92 using path_list = SmallVector<std::string, 16>; 93 94 enum CXXStdlibType { 95 CST_Libcxx, 96 CST_Libstdcxx 97 }; 98 99 enum RuntimeLibType { 100 RLT_CompilerRT, 101 RLT_Libgcc 102 }; 103 104 enum UnwindLibType { 105 UNW_None, 106 UNW_CompilerRT, 107 UNW_Libgcc 108 }; 109 110 enum RTTIMode { 111 RM_Enabled, 112 RM_Disabled, 113 }; 114 115 enum FileType { FT_Object, FT_Static, FT_Shared }; 116 117private: 118 friend class RegisterEffectiveTriple; 119 120 const Driver &D; 121 llvm::Triple Triple; 122 const llvm::opt::ArgList &Args; 123 124 // We need to initialize CachedRTTIArg before CachedRTTIMode 125 const llvm::opt::Arg *const CachedRTTIArg; 126 127 const RTTIMode CachedRTTIMode; 128 129 /// The list of toolchain specific path prefixes to search for libraries. 130 path_list LibraryPaths; 131 132 /// The list of toolchain specific path prefixes to search for files. 133 path_list FilePaths; 134 135 /// The list of toolchain specific path prefixes to search for programs. 136 path_list ProgramPaths; 137 138 mutable std::unique_ptr<Tool> Clang; 139 mutable std::unique_ptr<Tool> Flang; 140 mutable std::unique_ptr<Tool> Assemble; 141 mutable std::unique_ptr<Tool> Link; 142 mutable std::unique_ptr<Tool> StaticLibTool; 143 mutable std::unique_ptr<Tool> IfsMerge; 144 mutable std::unique_ptr<Tool> OffloadBundler; 145 mutable std::unique_ptr<Tool> OffloadWrapper; 146 147 Tool *getClang() const; 148 Tool *getFlang() const; 149 Tool *getAssemble() const; 150 Tool *getLink() const; 151 Tool *getStaticLibTool() const; 152 Tool *getIfsMerge() const; 153 Tool *getClangAs() const; 154 Tool *getOffloadBundler() const; 155 Tool *getOffloadWrapper() const; 156 157 mutable std::unique_ptr<SanitizerArgs> SanitizerArguments; 158 mutable std::unique_ptr<XRayArgs> XRayArguments; 159 160 /// The effective clang triple for the current Job. 161 mutable llvm::Triple EffectiveTriple; 162 163 /// Set the toolchain's effective clang triple. 164 void setEffectiveTriple(llvm::Triple ET) const { 165 EffectiveTriple = std::move(ET); 166 } 167 168protected: 169 MultilibSet Multilibs; 170 Multilib SelectedMultilib; 171 172 ToolChain(const Driver &D, const llvm::Triple &T, 173 const llvm::opt::ArgList &Args); 174 175 void setTripleEnvironment(llvm::Triple::EnvironmentType Env); 176 177 virtual Tool *buildAssembler() const; 178 virtual Tool *buildLinker() const; 179 virtual Tool *buildStaticLibTool() const; 180 virtual Tool *getTool(Action::ActionClass AC) const; 181 182 /// \name Utilities for implementing subclasses. 183 ///@{ 184 static void addSystemInclude(const llvm::opt::ArgList &DriverArgs, 185 llvm::opt::ArgStringList &CC1Args, 186 const Twine &Path); 187 static void addExternCSystemInclude(const llvm::opt::ArgList &DriverArgs, 188 llvm::opt::ArgStringList &CC1Args, 189 const Twine &Path); 190 static void 191 addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs, 192 llvm::opt::ArgStringList &CC1Args, 193 const Twine &Path); 194 static void addSystemIncludes(const llvm::opt::ArgList &DriverArgs, 195 llvm::opt::ArgStringList &CC1Args, 196 ArrayRef<StringRef> Paths); 197 ///@} 198 199public: 200 virtual ~ToolChain(); 201 202 // Accessors 203 204 const Driver &getDriver() const { return D; } 205 llvm::vfs::FileSystem &getVFS() const; 206 const llvm::Triple &getTriple() const { return Triple; } 207 208 /// Get the toolchain's aux triple, if it has one. 209 /// 210 /// Exactly what the aux triple represents depends on the toolchain, but for 211 /// example when compiling CUDA code for the GPU, the triple might be NVPTX, 212 /// while the aux triple is the host (CPU) toolchain, e.g. x86-linux-gnu. 213 virtual const llvm::Triple *getAuxTriple() const { return nullptr; } 214 215 /// Some toolchains need to modify the file name, for example to replace the 216 /// extension for object files with .cubin for OpenMP offloading to Nvidia 217 /// GPUs. 218 virtual std::string getInputFilename(const InputInfo &Input) const; 219 220 llvm::Triple::ArchType getArch() const { return Triple.getArch(); } 221 StringRef getArchName() const { return Triple.getArchName(); } 222 StringRef getPlatform() const { return Triple.getVendorName(); } 223 StringRef getOS() const { return Triple.getOSName(); } 224 225 /// Provide the default architecture name (as expected by -arch) for 226 /// this toolchain. 227 StringRef getDefaultUniversalArchName() const; 228 229 std::string getTripleString() const { 230 return Triple.getTriple(); 231 } 232 233 /// Get the toolchain's effective clang triple. 234 const llvm::Triple &getEffectiveTriple() const { 235 assert(!EffectiveTriple.getTriple().empty() && "No effective triple"); 236 return EffectiveTriple; 237 } 238 239 path_list &getLibraryPaths() { return LibraryPaths; } 240 const path_list &getLibraryPaths() const { return LibraryPaths; } 241 242 path_list &getFilePaths() { return FilePaths; } 243 const path_list &getFilePaths() const { return FilePaths; } 244 245 path_list &getProgramPaths() { return ProgramPaths; } 246 const path_list &getProgramPaths() const { return ProgramPaths; } 247 248 const MultilibSet &getMultilibs() const { return Multilibs; } 249 250 const Multilib &getMultilib() const { return SelectedMultilib; } 251 252 const SanitizerArgs& getSanitizerArgs() const; 253 254 const XRayArgs& getXRayArgs() const; 255 256 // Returns the Arg * that explicitly turned on/off rtti, or nullptr. 257 const llvm::opt::Arg *getRTTIArg() const { return CachedRTTIArg; } 258 259 // Returns the RTTIMode for the toolchain with the current arguments. 260 RTTIMode getRTTIMode() const { return CachedRTTIMode; } 261 262 /// Return any implicit target and/or mode flag for an invocation of 263 /// the compiler driver as `ProgName`. 264 /// 265 /// For example, when called with i686-linux-android-g++, the first element 266 /// of the return value will be set to `"i686-linux-android"` and the second 267 /// will be set to "--driver-mode=g++"`. 268 /// It is OK if the target name is not registered. In this case the return 269 /// value contains false in the field TargetIsValid. 270 /// 271 /// \pre `llvm::InitializeAllTargets()` has been called. 272 /// \param ProgName The name the Clang driver was invoked with (from, 273 /// e.g., argv[0]). 274 /// \return A structure of type ParsedClangName that contains the executable 275 /// name parts. 276 static ParsedClangName getTargetAndModeFromProgramName(StringRef ProgName); 277 278 // Tool access. 279 280 /// TranslateArgs - Create a new derived argument list for any argument 281 /// translations this ToolChain may wish to perform, or 0 if no tool chain 282 /// specific translations are needed. If \p DeviceOffloadKind is specified 283 /// the translation specific for that offload kind is performed. 284 /// 285 /// \param BoundArch - The bound architecture name, or 0. 286 /// \param DeviceOffloadKind - The device offload kind used for the 287 /// translation. 288 virtual llvm::opt::DerivedArgList * 289 TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch, 290 Action::OffloadKind DeviceOffloadKind) const { 291 return nullptr; 292 } 293 294 /// TranslateOpenMPTargetArgs - Create a new derived argument list for 295 /// that contains the OpenMP target specific flags passed via 296 /// -Xopenmp-target -opt=val OR -Xopenmp-target=<triple> -opt=val 297 virtual llvm::opt::DerivedArgList *TranslateOpenMPTargetArgs( 298 const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost, 299 SmallVectorImpl<llvm::opt::Arg *> &AllocatedArgs) const; 300 301 /// Append the argument following \p A to \p DAL assuming \p A is an Xarch 302 /// argument. If \p AllocatedArgs is null pointer, synthesized arguments are 303 /// added to \p DAL, otherwise they are appended to \p AllocatedArgs. 304 virtual void TranslateXarchArgs( 305 const llvm::opt::DerivedArgList &Args, llvm::opt::Arg *&A, 306 llvm::opt::DerivedArgList *DAL, 307 SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs = nullptr) const; 308 309 /// Translate -Xarch_ arguments. If there are no such arguments, return 310 /// a null pointer, otherwise return a DerivedArgList containing the 311 /// translated arguments. 312 virtual llvm::opt::DerivedArgList * 313 TranslateXarchArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch, 314 Action::OffloadKind DeviceOffloadKind, 315 SmallVectorImpl<llvm::opt::Arg *> *AllocatedArgs) const; 316 317 /// Choose a tool to use to handle the action \p JA. 318 /// 319 /// This can be overridden when a particular ToolChain needs to use 320 /// a compiler other than Clang. 321 virtual Tool *SelectTool(const JobAction &JA) const; 322 323 // Helper methods 324 325 std::string GetFilePath(const char *Name) const; 326 std::string GetProgramPath(const char *Name) const; 327 328 /// Returns the linker path, respecting the -fuse-ld= argument to determine 329 /// the linker suffix or name. 330 std::string GetLinkerPath() const; 331 332 /// Returns the linker path for emitting a static library. 333 std::string GetStaticLibToolPath() const; 334 335 /// Dispatch to the specific toolchain for verbose printing. 336 /// 337 /// This is used when handling the verbose option to print detailed, 338 /// toolchain-specific information useful for understanding the behavior of 339 /// the driver on a specific platform. 340 virtual void printVerboseInfo(raw_ostream &OS) const {} 341 342 // Platform defaults information 343 344 /// Returns true if the toolchain is targeting a non-native 345 /// architecture. 346 virtual bool isCrossCompiling() const; 347 348 /// HasNativeLTOLinker - Check whether the linker and related tools have 349 /// native LLVM support. 350 virtual bool HasNativeLLVMSupport() const; 351 352 /// LookupTypeForExtension - Return the default language type to use for the 353 /// given extension. 354 virtual types::ID LookupTypeForExtension(StringRef Ext) const; 355 356 /// IsBlocksDefault - Does this tool chain enable -fblocks by default. 357 virtual bool IsBlocksDefault() const { return false; } 358 359 /// IsIntegratedAssemblerDefault - Does this tool chain enable -integrated-as 360 /// by default. 361 virtual bool IsIntegratedAssemblerDefault() const { return false; } 362 363 /// Check if the toolchain should use the integrated assembler. 364 virtual bool useIntegratedAs() const; 365 366 /// IsMathErrnoDefault - Does this tool chain use -fmath-errno by default. 367 virtual bool IsMathErrnoDefault() const { return true; } 368 369 /// IsEncodeExtendedBlockSignatureDefault - Does this tool chain enable 370 /// -fencode-extended-block-signature by default. 371 virtual bool IsEncodeExtendedBlockSignatureDefault() const { return false; } 372 373 /// IsObjCNonFragileABIDefault - Does this tool chain set 374 /// -fobjc-nonfragile-abi by default. 375 virtual bool IsObjCNonFragileABIDefault() const { return false; } 376 377 /// UseObjCMixedDispatchDefault - When using non-legacy dispatch, should the 378 /// mixed dispatch method be used? 379 virtual bool UseObjCMixedDispatch() const { return false; } 380 381 /// Check whether to enable x86 relax relocations by default. 382 virtual bool useRelaxRelocations() const; 383 384 /// GetDefaultStackProtectorLevel - Get the default stack protector level for 385 /// this tool chain (0=off, 1=on, 2=strong, 3=all). 386 virtual unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const { 387 return 0; 388 } 389 390 /// Get the default trivial automatic variable initialization. 391 virtual LangOptions::TrivialAutoVarInitKind 392 GetDefaultTrivialAutoVarInit() const { 393 return LangOptions::TrivialAutoVarInitKind::Uninitialized; 394 } 395 396 /// GetDefaultLinker - Get the default linker to use. 397 virtual const char *getDefaultLinker() const { return "ld"; } 398 399 /// GetDefaultRuntimeLibType - Get the default runtime library variant to use. 400 virtual RuntimeLibType GetDefaultRuntimeLibType() const { 401 return ToolChain::RLT_Libgcc; 402 } 403 404 virtual CXXStdlibType GetDefaultCXXStdlibType() const { 405 return ToolChain::CST_Libstdcxx; 406 } 407 408 virtual UnwindLibType GetDefaultUnwindLibType() const { 409 return ToolChain::UNW_None; 410 } 411 412 virtual std::string getCompilerRTPath() const; 413 414 virtual std::string getCompilerRT(const llvm::opt::ArgList &Args, 415 StringRef Component, 416 FileType Type = ToolChain::FT_Static) const; 417 418 const char * 419 getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, 420 FileType Type = ToolChain::FT_Static) const; 421 422 std::string getCompilerRTBasename(const llvm::opt::ArgList &Args, 423 StringRef Component, 424 FileType Type = ToolChain::FT_Static, 425 bool AddArch = true) const; 426 427 // Returns target specific runtime path if it exists. 428 virtual Optional<std::string> getRuntimePath() const; 429 430 // Returns target specific C++ library path if it exists. 431 virtual Optional<std::string> getCXXStdlibPath() const; 432 433 // Returns <ResourceDir>/lib/<OSName>/<arch>. This is used by runtimes (such 434 // as OpenMP) to find arch-specific libraries. 435 std::string getArchSpecificLibPath() const; 436 437 // Returns <OSname> part of above. 438 StringRef getOSLibName() const; 439 440 /// needsProfileRT - returns true if instrumentation profile is on. 441 static bool needsProfileRT(const llvm::opt::ArgList &Args); 442 443 /// Returns true if gcov instrumentation (-fprofile-arcs or --coverage) is on. 444 static bool needsGCovInstrumentation(const llvm::opt::ArgList &Args); 445 446 /// IsUnwindTablesDefault - Does this tool chain use -funwind-tables 447 /// by default. 448 virtual bool IsUnwindTablesDefault(const llvm::opt::ArgList &Args) const; 449 450 /// Test whether this toolchain defaults to PIC. 451 virtual bool isPICDefault() const = 0; 452 453 /// Test whether this toolchain defaults to PIE. 454 virtual bool isPIEDefault() const = 0; 455 456 /// Test whether this toolchaind defaults to non-executable stacks. 457 virtual bool isNoExecStackDefault() const; 458 459 /// Tests whether this toolchain forces its default for PIC, PIE or 460 /// non-PIC. If this returns true, any PIC related flags should be ignored 461 /// and instead the results of \c isPICDefault() and \c isPIEDefault() are 462 /// used exclusively. 463 virtual bool isPICDefaultForced() const = 0; 464 465 /// SupportsProfiling - Does this tool chain support -pg. 466 virtual bool SupportsProfiling() const { return true; } 467 468 /// Complain if this tool chain doesn't support Objective-C ARC. 469 virtual void CheckObjCARC() const {} 470 471 /// Get the default debug info format. Typically, this is DWARF. 472 virtual codegenoptions::DebugInfoFormat getDefaultDebugFormat() const { 473 return codegenoptions::DIF_DWARF; 474 } 475 476 /// UseDwarfDebugFlags - Embed the compile options to clang into the Dwarf 477 /// compile unit information. 478 virtual bool UseDwarfDebugFlags() const { return false; } 479 480 // Return the DWARF version to emit, in the absence of arguments 481 // to the contrary. 482 virtual unsigned GetDefaultDwarfVersion() const { return 4; } 483 484 // True if the driver should assume "-fstandalone-debug" 485 // in the absence of an option specifying otherwise, 486 // provided that debugging was requested in the first place. 487 // i.e. a value of 'true' does not imply that debugging is wanted. 488 virtual bool GetDefaultStandaloneDebug() const { return false; } 489 490 // Return the default debugger "tuning." 491 virtual llvm::DebuggerKind getDefaultDebuggerTuning() const { 492 return llvm::DebuggerKind::GDB; 493 } 494 495 /// Does this toolchain supports given debug info option or not. 496 virtual bool supportsDebugInfoOption(const llvm::opt::Arg *) const { 497 return true; 498 } 499 500 /// Adjust debug information kind considering all passed options. 501 virtual void adjustDebugInfoKind(codegenoptions::DebugInfoKind &DebugInfoKind, 502 const llvm::opt::ArgList &Args) const {} 503 504 /// GetExceptionModel - Return the tool chain exception model. 505 virtual llvm::ExceptionHandling 506 GetExceptionModel(const llvm::opt::ArgList &Args) const; 507 508 /// SupportsEmbeddedBitcode - Does this tool chain support embedded bitcode. 509 virtual bool SupportsEmbeddedBitcode() const { return false; } 510 511 /// getThreadModel() - Which thread model does this target use? 512 virtual std::string getThreadModel() const { return "posix"; } 513 514 /// isThreadModelSupported() - Does this target support a thread model? 515 virtual bool isThreadModelSupported(const StringRef Model) const; 516 517 /// ComputeLLVMTriple - Return the LLVM target triple to use, after taking 518 /// command line arguments into account. 519 virtual std::string 520 ComputeLLVMTriple(const llvm::opt::ArgList &Args, 521 types::ID InputType = types::TY_INVALID) const; 522 523 /// ComputeEffectiveClangTriple - Return the Clang triple to use for this 524 /// target, which may take into account the command line arguments. For 525 /// example, on Darwin the -mmacosx-version-min= command line argument (which 526 /// sets the deployment target) determines the version in the triple passed to 527 /// Clang. 528 virtual std::string ComputeEffectiveClangTriple( 529 const llvm::opt::ArgList &Args, 530 types::ID InputType = types::TY_INVALID) const; 531 532 /// getDefaultObjCRuntime - Return the default Objective-C runtime 533 /// for this platform. 534 /// 535 /// FIXME: this really belongs on some sort of DeploymentTarget abstraction 536 virtual ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const; 537 538 /// hasBlocksRuntime - Given that the user is compiling with 539 /// -fblocks, does this tool chain guarantee the existence of a 540 /// blocks runtime? 541 /// 542 /// FIXME: this really belongs on some sort of DeploymentTarget abstraction 543 virtual bool hasBlocksRuntime() const { return true; } 544 545 /// Return the sysroot, possibly searching for a default sysroot using 546 /// target-specific logic. 547 virtual std::string computeSysRoot() const; 548 549 /// Add the clang cc1 arguments for system include paths. 550 /// 551 /// This routine is responsible for adding the necessary cc1 arguments to 552 /// include headers from standard system header directories. 553 virtual void 554 AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs, 555 llvm::opt::ArgStringList &CC1Args) const; 556 557 /// Add options that need to be passed to cc1 for this target. 558 virtual void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, 559 llvm::opt::ArgStringList &CC1Args, 560 Action::OffloadKind DeviceOffloadKind) const; 561 562 /// Add warning options that need to be passed to cc1 for this target. 563 virtual void addClangWarningOptions(llvm::opt::ArgStringList &CC1Args) const; 564 565 // GetRuntimeLibType - Determine the runtime library type to use with the 566 // given compilation arguments. 567 virtual RuntimeLibType 568 GetRuntimeLibType(const llvm::opt::ArgList &Args) const; 569 570 // GetCXXStdlibType - Determine the C++ standard library type to use with the 571 // given compilation arguments. 572 virtual CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const; 573 574 // GetUnwindLibType - Determine the unwind library type to use with the 575 // given compilation arguments. 576 virtual UnwindLibType GetUnwindLibType(const llvm::opt::ArgList &Args) const; 577 578 /// AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set 579 /// the include paths to use for the given C++ standard library type. 580 virtual void 581 AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs, 582 llvm::opt::ArgStringList &CC1Args) const; 583 584 /// AddClangCXXStdlibIsystemArgs - Add the clang -cc1 level arguments to set 585 /// the specified include paths for the C++ standard library. 586 void AddClangCXXStdlibIsystemArgs(const llvm::opt::ArgList &DriverArgs, 587 llvm::opt::ArgStringList &CC1Args) const; 588 589 /// Returns if the C++ standard library should be linked in. 590 /// Note that e.g. -lm should still be linked even if this returns false. 591 bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const; 592 593 /// AddCXXStdlibLibArgs - Add the system specific linker arguments to use 594 /// for the given C++ standard library type. 595 virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, 596 llvm::opt::ArgStringList &CmdArgs) const; 597 598 /// AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option. 599 void AddFilePathLibArgs(const llvm::opt::ArgList &Args, 600 llvm::opt::ArgStringList &CmdArgs) const; 601 602 /// AddCCKextLibArgs - Add the system specific linker arguments to use 603 /// for kernel extensions (Darwin-specific). 604 virtual void AddCCKextLibArgs(const llvm::opt::ArgList &Args, 605 llvm::opt::ArgStringList &CmdArgs) const; 606 607 /// If a runtime library exists that sets global flags for unsafe floating 608 /// point math, return true. 609 /// 610 /// This checks for presence of the -Ofast, -ffast-math or -funsafe-math flags. 611 virtual bool isFastMathRuntimeAvailable( 612 const llvm::opt::ArgList &Args, std::string &Path) const; 613 614 /// AddFastMathRuntimeIfAvailable - If a runtime library exists that sets 615 /// global flags for unsafe floating point math, add it and return true. 616 /// 617 /// This checks for presence of the -Ofast, -ffast-math or -funsafe-math flags. 618 bool addFastMathRuntimeIfAvailable( 619 const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const; 620 621 /// addProfileRTLibs - When -fprofile-instr-profile is specified, try to pass 622 /// a suitable profile runtime library to the linker. 623 virtual void addProfileRTLibs(const llvm::opt::ArgList &Args, 624 llvm::opt::ArgStringList &CmdArgs) const; 625 626 /// Add arguments to use system-specific CUDA includes. 627 virtual void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs, 628 llvm::opt::ArgStringList &CC1Args) const; 629 630 /// Add arguments to use system-specific HIP includes. 631 virtual void AddHIPIncludeArgs(const llvm::opt::ArgList &DriverArgs, 632 llvm::opt::ArgStringList &CC1Args) const; 633 634 /// Add arguments to use MCU GCC toolchain includes. 635 virtual void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs, 636 llvm::opt::ArgStringList &CC1Args) const; 637 638 /// On Windows, returns the MSVC compatibility version. 639 virtual VersionTuple computeMSVCVersion(const Driver *D, 640 const llvm::opt::ArgList &Args) const; 641 642 /// Return sanitizers which are available in this toolchain. 643 virtual SanitizerMask getSupportedSanitizers() const; 644 645 /// Return sanitizers which are enabled by default. 646 virtual SanitizerMask getDefaultSanitizers() const { 647 return SanitizerMask(); 648 } 649 650 /// Returns true when it's possible to split LTO unit to use whole 651 /// program devirtualization and CFI santiizers. 652 virtual bool canSplitThinLTOUnit() const { return true; } 653 654 /// Returns the output denormal handling type in the default floating point 655 /// environment for the given \p FPType if given. Otherwise, the default 656 /// assumed mode for any floating point type. 657 virtual llvm::DenormalMode getDefaultDenormalModeForType( 658 const llvm::opt::ArgList &DriverArgs, const JobAction &JA, 659 const llvm::fltSemantics *FPType = nullptr) const { 660 return llvm::DenormalMode::getIEEE(); 661 } 662}; 663 664/// Set a ToolChain's effective triple. Reset it when the registration object 665/// is destroyed. 666class RegisterEffectiveTriple { 667 const ToolChain &TC; 668 669public: 670 RegisterEffectiveTriple(const ToolChain &TC, llvm::Triple T) : TC(TC) { 671 TC.setEffectiveTriple(std::move(T)); 672 } 673 674 ~RegisterEffectiveTriple() { TC.setEffectiveTriple(llvm::Triple()); } 675}; 676 677} // namespace driver 678 679} // namespace clang 680 681#endif // LLVM_CLANG_DRIVER_TOOLCHAIN_H 682