1 //===--- LLVM.cpp - Clang+LLVM ToolChain Implementations --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 #include "Arch/AArch64.h"
13 #include "Arch/Mips.h"
15 #include "Arch/Sparc.h"
16 #include "Arch/SystemZ.h"
18 #include "CommonArgs.h"
20 #include "InputInfo.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/TargetParser.h"
39 #include "llvm/Support/YAMLParser.h"
42 #include <unistd.h> // For getuid().
45 using namespace clang::driver;
46 using namespace clang::driver::tools;
47 using namespace clang;
48 using namespace llvm::opt;
50 static void CheckPreprocessingOptions(const Driver &D, const ArgList &Args) {
52 Args.getLastArg(clang::driver::options::OPT_C, options::OPT_CC)) {
53 if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_P) &&
54 !Args.hasArg(options::OPT__SLASH_EP) && !D.CCCIsCPP()) {
55 D.Diag(clang::diag::err_drv_argument_only_allowed_with)
56 << A->getBaseArg().getAsString(Args)
57 << (D.IsCLMode() ? "/E, /P or /EP" : "-E");
62 static void CheckCodeGenerationOptions(const Driver &D, const ArgList &Args) {
63 // In gcc, only ARM checks this, but it seems reasonable to check universally.
64 if (Args.hasArg(options::OPT_static))
66 Args.getLastArg(options::OPT_dynamic, options::OPT_mdynamic_no_pic))
67 D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args)
71 // Add backslashes to escape spaces and other backslashes.
72 // This is used for the space-separated argument list specified with
73 // the -dwarf-debug-flags option.
74 static void EscapeSpacesAndBackslashes(const char *Arg,
75 SmallVectorImpl<char> &Res) {
89 // Quote target names for inclusion in GNU Make dependency files.
90 // Only the characters '$', '#', ' ', '\t' are quoted.
91 static void QuoteTarget(StringRef Target, SmallVectorImpl<char> &Res) {
92 for (unsigned i = 0, e = Target.size(); i != e; ++i) {
96 // Escape the preceding backslashes
97 for (int j = i - 1; j >= 0 && Target[j] == '\\'; --j)
100 // Escape the space/tab
113 Res.push_back(Target[i]);
117 /// Apply \a Work on the current tool chain \a RegularToolChain and any other
118 /// offloading tool chain that is associated with the current action \a JA.
120 forAllAssociatedToolChains(Compilation &C, const JobAction &JA,
121 const ToolChain &RegularToolChain,
122 llvm::function_ref<void(const ToolChain &)> Work) {
123 // Apply Work on the current/regular tool chain.
124 Work(RegularToolChain);
126 // Apply Work on all the offloading tool chains associated with the current
128 if (JA.isHostOffloading(Action::OFK_Cuda))
129 Work(*C.getSingleOffloadToolChain<Action::OFK_Cuda>());
130 else if (JA.isDeviceOffloading(Action::OFK_Cuda))
131 Work(*C.getSingleOffloadToolChain<Action::OFK_Host>());
133 if (JA.isHostOffloading(Action::OFK_OpenMP)) {
134 auto TCs = C.getOffloadToolChains<Action::OFK_OpenMP>();
135 for (auto II = TCs.first, IE = TCs.second; II != IE; ++II)
137 } else if (JA.isDeviceOffloading(Action::OFK_OpenMP))
138 Work(*C.getSingleOffloadToolChain<Action::OFK_Host>());
141 // TODO: Add support for other offloading programming models here.
145 /// This is a helper function for validating the optional refinement step
146 /// parameter in reciprocal argument strings. Return false if there is an error
147 /// parsing the refinement step. Otherwise, return true and set the Position
148 /// of the refinement step in the input string.
149 static bool getRefinementStep(StringRef In, const Driver &D,
150 const Arg &A, size_t &Position) {
151 const char RefinementStepToken = ':';
152 Position = In.find(RefinementStepToken);
153 if (Position != StringRef::npos) {
154 StringRef Option = A.getOption().getName();
155 StringRef RefStep = In.substr(Position + 1);
156 // Allow exactly one numeric character for the additional refinement
157 // step parameter. This is reasonable for all currently-supported
158 // operations and architectures because we would expect that a larger value
159 // of refinement steps would cause the estimate "optimization" to
160 // under-perform the native operation. Also, if the estimate does not
161 // converge quickly, it probably will not ever converge, so further
162 // refinement steps will not produce a better answer.
163 if (RefStep.size() != 1) {
164 D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
167 char RefStepChar = RefStep[0];
168 if (RefStepChar < '0' || RefStepChar > '9') {
169 D.Diag(diag::err_drv_invalid_value) << Option << RefStep;
176 /// The -mrecip flag requires processing of many optional parameters.
177 static void ParseMRecip(const Driver &D, const ArgList &Args,
178 ArgStringList &OutStrings) {
179 StringRef DisabledPrefixIn = "!";
180 StringRef DisabledPrefixOut = "!";
181 StringRef EnabledPrefixOut = "";
182 StringRef Out = "-mrecip=";
184 Arg *A = Args.getLastArg(options::OPT_mrecip, options::OPT_mrecip_EQ);
188 unsigned NumOptions = A->getNumValues();
189 if (NumOptions == 0) {
190 // No option is the same as "all".
191 OutStrings.push_back(Args.MakeArgString(Out + "all"));
195 // Pass through "all", "none", or "default" with an optional refinement step.
196 if (NumOptions == 1) {
197 StringRef Val = A->getValue(0);
199 if (!getRefinementStep(Val, D, *A, RefStepLoc))
201 StringRef ValBase = Val.slice(0, RefStepLoc);
202 if (ValBase == "all" || ValBase == "none" || ValBase == "default") {
203 OutStrings.push_back(Args.MakeArgString(Out + Val));
208 // Each reciprocal type may be enabled or disabled individually.
209 // Check each input value for validity, concatenate them all back together,
212 llvm::StringMap<bool> OptionStrings;
213 OptionStrings.insert(std::make_pair("divd", false));
214 OptionStrings.insert(std::make_pair("divf", false));
215 OptionStrings.insert(std::make_pair("vec-divd", false));
216 OptionStrings.insert(std::make_pair("vec-divf", false));
217 OptionStrings.insert(std::make_pair("sqrtd", false));
218 OptionStrings.insert(std::make_pair("sqrtf", false));
219 OptionStrings.insert(std::make_pair("vec-sqrtd", false));
220 OptionStrings.insert(std::make_pair("vec-sqrtf", false));
222 for (unsigned i = 0; i != NumOptions; ++i) {
223 StringRef Val = A->getValue(i);
225 bool IsDisabled = Val.startswith(DisabledPrefixIn);
226 // Ignore the disablement token for string matching.
231 if (!getRefinementStep(Val, D, *A, RefStep))
234 StringRef ValBase = Val.slice(0, RefStep);
235 llvm::StringMap<bool>::iterator OptionIter = OptionStrings.find(ValBase);
236 if (OptionIter == OptionStrings.end()) {
237 // Try again specifying float suffix.
238 OptionIter = OptionStrings.find(ValBase.str() + 'f');
239 if (OptionIter == OptionStrings.end()) {
240 // The input name did not match any known option string.
241 D.Diag(diag::err_drv_unknown_argument) << Val;
244 // The option was specified without a float or double suffix.
245 // Make sure that the double entry was not already specified.
246 // The float entry will be checked below.
247 if (OptionStrings[ValBase.str() + 'd']) {
248 D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
253 if (OptionIter->second == true) {
254 // Duplicate option specified.
255 D.Diag(diag::err_drv_invalid_value) << A->getOption().getName() << Val;
259 // Mark the matched option as found. Do not allow duplicate specifiers.
260 OptionIter->second = true;
262 // If the precision was not specified, also mark the double entry as found.
263 if (ValBase.back() != 'f' && ValBase.back() != 'd')
264 OptionStrings[ValBase.str() + 'd'] = true;
266 // Build the output string.
267 StringRef Prefix = IsDisabled ? DisabledPrefixOut : EnabledPrefixOut;
268 Out = Args.MakeArgString(Out + Prefix + Val);
269 if (i != NumOptions - 1)
270 Out = Args.MakeArgString(Out + ",");
273 OutStrings.push_back(Args.MakeArgString(Out));
276 static void getHexagonTargetFeatures(const ArgList &Args,
277 std::vector<StringRef> &Features) {
278 handleTargetFeaturesGroup(Args, Features,
279 options::OPT_m_hexagon_Features_Group);
281 bool UseLongCalls = false;
282 if (Arg *A = Args.getLastArg(options::OPT_mlong_calls,
283 options::OPT_mno_long_calls)) {
284 if (A->getOption().matches(options::OPT_mlong_calls))
288 Features.push_back(UseLongCalls ? "+long-calls" : "-long-calls");
291 static void getWebAssemblyTargetFeatures(const ArgList &Args,
292 std::vector<StringRef> &Features) {
293 handleTargetFeaturesGroup(Args, Features, options::OPT_m_wasm_Features_Group);
296 static void getAMDGPUTargetFeatures(const Driver &D, const ArgList &Args,
297 std::vector<StringRef> &Features) {
298 if (const Arg *dAbi = Args.getLastArg(options::OPT_mamdgpu_debugger_abi)) {
299 StringRef value = dAbi->getValue();
300 if (value == "1.0") {
301 Features.push_back("+amdgpu-debugger-insert-nops");
302 Features.push_back("+amdgpu-debugger-reserve-regs");
303 Features.push_back("+amdgpu-debugger-emit-prologue");
305 D.Diag(diag::err_drv_clang_unsupported) << dAbi->getAsString(Args);
309 handleTargetFeaturesGroup(
310 Args, Features, options::OPT_m_amdgpu_Features_Group);
313 static void getTargetFeatures(const ToolChain &TC, const llvm::Triple &Triple,
314 const ArgList &Args, ArgStringList &CmdArgs,
316 const Driver &D = TC.getDriver();
317 std::vector<StringRef> Features;
318 switch (Triple.getArch()) {
321 case llvm::Triple::mips:
322 case llvm::Triple::mipsel:
323 case llvm::Triple::mips64:
324 case llvm::Triple::mips64el:
325 mips::getMIPSTargetFeatures(D, Triple, Args, Features);
328 case llvm::Triple::arm:
329 case llvm::Triple::armeb:
330 case llvm::Triple::thumb:
331 case llvm::Triple::thumbeb:
332 arm::getARMTargetFeatures(TC, Triple, Args, CmdArgs, Features, ForAS);
335 case llvm::Triple::ppc:
336 case llvm::Triple::ppc64:
337 case llvm::Triple::ppc64le:
338 ppc::getPPCTargetFeatures(D, Triple, Args, Features);
340 case llvm::Triple::systemz:
341 systemz::getSystemZTargetFeatures(Args, Features);
343 case llvm::Triple::aarch64:
344 case llvm::Triple::aarch64_be:
345 aarch64::getAArch64TargetFeatures(D, Args, Features);
347 case llvm::Triple::x86:
348 case llvm::Triple::x86_64:
349 x86::getX86TargetFeatures(D, Triple, Args, Features);
351 case llvm::Triple::hexagon:
352 getHexagonTargetFeatures(Args, Features);
354 case llvm::Triple::wasm32:
355 case llvm::Triple::wasm64:
356 getWebAssemblyTargetFeatures(Args, Features);
358 case llvm::Triple::sparc:
359 case llvm::Triple::sparcel:
360 case llvm::Triple::sparcv9:
361 sparc::getSparcTargetFeatures(D, Args, Features);
363 case llvm::Triple::r600:
364 case llvm::Triple::amdgcn:
365 getAMDGPUTargetFeatures(D, Args, Features);
369 // Find the last of each feature.
370 llvm::StringMap<unsigned> LastOpt;
371 for (unsigned I = 0, N = Features.size(); I < N; ++I) {
372 StringRef Name = Features[I];
373 assert(Name[0] == '-' || Name[0] == '+');
374 LastOpt[Name.drop_front(1)] = I;
377 for (unsigned I = 0, N = Features.size(); I < N; ++I) {
378 // If this feature was overridden, ignore it.
379 StringRef Name = Features[I];
380 llvm::StringMap<unsigned>::iterator LastI = LastOpt.find(Name.drop_front(1));
381 assert(LastI != LastOpt.end());
382 unsigned Last = LastI->second;
386 CmdArgs.push_back("-target-feature");
387 CmdArgs.push_back(Name.data());
392 shouldUseExceptionTablesForObjCExceptions(const ObjCRuntime &runtime,
393 const llvm::Triple &Triple) {
394 // We use the zero-cost exception tables for Objective-C if the non-fragile
395 // ABI is enabled or when compiling for x86_64 and ARM on Snow Leopard and
397 if (runtime.isNonFragile())
400 if (!Triple.isMacOSX())
403 return (!Triple.isMacOSXVersionLT(10, 5) &&
404 (Triple.getArch() == llvm::Triple::x86_64 ||
405 Triple.getArch() == llvm::Triple::arm));
408 /// Adds exception related arguments to the driver command arguments. There's a
409 /// master flag, -fexceptions and also language specific flags to enable/disable
410 /// C++ and Objective-C exceptions. This makes it possible to for example
411 /// disable C++ exceptions but enable Objective-C exceptions.
412 static void addExceptionArgs(const ArgList &Args, types::ID InputType,
413 const ToolChain &TC, bool KernelOrKext,
414 const ObjCRuntime &objcRuntime,
415 ArgStringList &CmdArgs) {
416 const Driver &D = TC.getDriver();
417 const llvm::Triple &Triple = TC.getTriple();
420 // -mkernel and -fapple-kext imply no exceptions, so claim exception related
421 // arguments now to avoid warnings about unused arguments.
422 Args.ClaimAllArgs(options::OPT_fexceptions);
423 Args.ClaimAllArgs(options::OPT_fno_exceptions);
424 Args.ClaimAllArgs(options::OPT_fobjc_exceptions);
425 Args.ClaimAllArgs(options::OPT_fno_objc_exceptions);
426 Args.ClaimAllArgs(options::OPT_fcxx_exceptions);
427 Args.ClaimAllArgs(options::OPT_fno_cxx_exceptions);
431 // See if the user explicitly enabled exceptions.
432 bool EH = Args.hasFlag(options::OPT_fexceptions, options::OPT_fno_exceptions,
435 // Obj-C exceptions are enabled by default, regardless of -fexceptions. This
436 // is not necessarily sensible, but follows GCC.
437 if (types::isObjC(InputType) &&
438 Args.hasFlag(options::OPT_fobjc_exceptions,
439 options::OPT_fno_objc_exceptions, true)) {
440 CmdArgs.push_back("-fobjc-exceptions");
442 EH |= shouldUseExceptionTablesForObjCExceptions(objcRuntime, Triple);
445 if (types::isCXX(InputType)) {
446 // Disable C++ EH by default on XCore and PS4.
447 bool CXXExceptionsEnabled =
448 Triple.getArch() != llvm::Triple::xcore && !Triple.isPS4CPU();
449 Arg *ExceptionArg = Args.getLastArg(
450 options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions,
451 options::OPT_fexceptions, options::OPT_fno_exceptions);
453 CXXExceptionsEnabled =
454 ExceptionArg->getOption().matches(options::OPT_fcxx_exceptions) ||
455 ExceptionArg->getOption().matches(options::OPT_fexceptions);
457 if (CXXExceptionsEnabled) {
458 if (Triple.isPS4CPU()) {
459 ToolChain::RTTIMode RTTIMode = TC.getRTTIMode();
460 assert(ExceptionArg &&
461 "On the PS4 exceptions should only be enabled if passing "
463 if (RTTIMode == ToolChain::RM_DisabledExplicitly) {
464 const Arg *RTTIArg = TC.getRTTIArg();
465 assert(RTTIArg && "RTTI disabled explicitly but no RTTIArg!");
466 D.Diag(diag::err_drv_argument_not_allowed_with)
467 << RTTIArg->getAsString(Args) << ExceptionArg->getAsString(Args);
468 } else if (RTTIMode == ToolChain::RM_EnabledImplicitly)
469 D.Diag(diag::warn_drv_enabling_rtti_with_exceptions);
471 assert(TC.getRTTIMode() != ToolChain::RM_DisabledImplicitly);
473 CmdArgs.push_back("-fcxx-exceptions");
480 CmdArgs.push_back("-fexceptions");
483 static bool ShouldDisableAutolink(const ArgList &Args, const ToolChain &TC) {
485 if (TC.getTriple().isOSDarwin()) {
486 // The native darwin assembler doesn't support the linker_option directives,
487 // so we disable them if we think the .s file will be passed to it.
488 Default = TC.useIntegratedAs();
490 return !Args.hasFlag(options::OPT_fautolink, options::OPT_fno_autolink,
494 static bool ShouldDisableDwarfDirectory(const ArgList &Args,
495 const ToolChain &TC) {
496 bool UseDwarfDirectory =
497 Args.hasFlag(options::OPT_fdwarf_directory_asm,
498 options::OPT_fno_dwarf_directory_asm, TC.useIntegratedAs());
499 return !UseDwarfDirectory;
502 // Convert an arg of the form "-gN" or "-ggdbN" or one of their aliases
503 // to the corresponding DebugInfoKind.
504 static codegenoptions::DebugInfoKind DebugLevelToInfoKind(const Arg &A) {
505 assert(A.getOption().matches(options::OPT_gN_Group) &&
506 "Not a -g option that specifies a debug-info level");
507 if (A.getOption().matches(options::OPT_g0) ||
508 A.getOption().matches(options::OPT_ggdb0))
509 return codegenoptions::NoDebugInfo;
510 if (A.getOption().matches(options::OPT_gline_tables_only) ||
511 A.getOption().matches(options::OPT_ggdb1))
512 return codegenoptions::DebugLineTablesOnly;
513 return codegenoptions::LimitedDebugInfo;
516 static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
517 switch (Triple.getArch()){
520 case llvm::Triple::arm:
521 case llvm::Triple::thumb:
522 // ARM Darwin targets require a frame pointer to be always present to aid
523 // offline debugging via backtraces.
524 return Triple.isOSDarwin();
528 static bool useFramePointerForTargetByDefault(const ArgList &Args,
529 const llvm::Triple &Triple) {
530 switch (Triple.getArch()) {
531 case llvm::Triple::xcore:
532 case llvm::Triple::wasm32:
533 case llvm::Triple::wasm64:
534 // XCore never wants frame pointers, regardless of OS.
535 // WebAssembly never wants frame pointers.
541 if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI) {
542 switch (Triple.getArch()) {
543 // Don't use a frame pointer on linux if optimizing for certain targets.
544 case llvm::Triple::mips64:
545 case llvm::Triple::mips64el:
546 case llvm::Triple::mips:
547 case llvm::Triple::mipsel:
548 case llvm::Triple::ppc:
549 case llvm::Triple::ppc64:
550 case llvm::Triple::ppc64le:
551 case llvm::Triple::systemz:
552 case llvm::Triple::x86:
553 case llvm::Triple::x86_64:
554 return !areOptimizationsEnabled(Args);
560 if (Triple.isOSWindows()) {
561 switch (Triple.getArch()) {
562 case llvm::Triple::x86:
563 return !areOptimizationsEnabled(Args);
564 case llvm::Triple::x86_64:
565 return Triple.isOSBinFormatMachO();
566 case llvm::Triple::arm:
567 case llvm::Triple::thumb:
568 // Windows on ARM builds with FPO disabled to aid fast stack walking
571 // All other supported Windows ISAs use xdata unwind information, so frame
572 // pointers are not generally useful.
580 static bool shouldUseFramePointer(const ArgList &Args,
581 const llvm::Triple &Triple) {
582 if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer,
583 options::OPT_fomit_frame_pointer))
584 return A->getOption().matches(options::OPT_fno_omit_frame_pointer) ||
585 mustUseNonLeafFramePointerForTarget(Triple);
587 if (Args.hasArg(options::OPT_pg))
590 return useFramePointerForTargetByDefault(Args, Triple);
593 static bool shouldUseLeafFramePointer(const ArgList &Args,
594 const llvm::Triple &Triple) {
595 if (Arg *A = Args.getLastArg(options::OPT_mno_omit_leaf_frame_pointer,
596 options::OPT_momit_leaf_frame_pointer))
597 return A->getOption().matches(options::OPT_mno_omit_leaf_frame_pointer);
599 if (Args.hasArg(options::OPT_pg))
602 if (Triple.isPS4CPU())
605 return useFramePointerForTargetByDefault(Args, Triple);
608 /// Add a CC1 option to specify the debug compilation directory.
609 static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs) {
610 SmallString<128> cwd;
611 if (!llvm::sys::fs::current_path(cwd)) {
612 CmdArgs.push_back("-fdebug-compilation-dir");
613 CmdArgs.push_back(Args.MakeArgString(cwd));
617 /// \brief Vectorize at all optimization levels greater than 1 except for -Oz.
618 /// For -Oz the loop vectorizer is disable, while the slp vectorizer is enabled.
619 static bool shouldEnableVectorizerAtOLevel(const ArgList &Args, bool isSlpVec) {
620 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
621 if (A->getOption().matches(options::OPT_O4) ||
622 A->getOption().matches(options::OPT_Ofast))
625 if (A->getOption().matches(options::OPT_O0))
628 assert(A->getOption().matches(options::OPT_O) && "Must have a -O flag");
631 StringRef S(A->getValue());
635 // Don't vectorize -Oz, unless it's the slp vectorizer.
639 unsigned OptLevel = 0;
640 if (S.getAsInteger(10, OptLevel))
649 /// Add -x lang to \p CmdArgs for \p Input.
650 static void addDashXForInput(const ArgList &Args, const InputInfo &Input,
651 ArgStringList &CmdArgs) {
652 // When using -verify-pch, we don't want to provide the type
653 // 'precompiled-header' if it was inferred from the file extension
654 if (Args.hasArg(options::OPT_verify_pch) && Input.getType() == types::TY_PCH)
657 CmdArgs.push_back("-x");
658 if (Args.hasArg(options::OPT_rewrite_objc))
659 CmdArgs.push_back(types::getTypeName(types::TY_PP_ObjCXX));
661 // Map the driver type to the frontend type. This is mostly an identity
662 // mapping, except that the distinction between module interface units
663 // and other source files does not exist at the frontend layer.
664 const char *ClangType;
665 switch (Input.getType()) {
666 case types::TY_CXXModule:
669 case types::TY_PP_CXXModule:
670 ClangType = "c++-cpp-output";
673 ClangType = types::getTypeName(Input.getType());
676 CmdArgs.push_back(ClangType);
680 static void appendUserToPath(SmallVectorImpl<char> &Result) {
682 const char *Username = getenv("LOGNAME");
684 const char *Username = getenv("USERNAME");
687 // Validate that LoginName can be used in a path, and get its length.
689 for (const char *P = Username; *P; ++P, ++Len) {
690 if (!clang::isAlphanumeric(*P) && *P != '_') {
696 if (Username && Len > 0) {
697 Result.append(Username, Username + Len);
702 // Fallback to user id.
704 std::string UID = llvm::utostr(getuid());
706 // FIXME: Windows seems to have an 'SID' that might work.
707 std::string UID = "9999";
709 Result.append(UID.begin(), UID.end());
712 static void addPGOAndCoverageFlags(Compilation &C, const Driver &D,
713 const InputInfo &Output, const ArgList &Args,
714 ArgStringList &CmdArgs) {
716 auto *PGOGenerateArg = Args.getLastArg(options::OPT_fprofile_generate,
717 options::OPT_fprofile_generate_EQ,
718 options::OPT_fno_profile_generate);
719 if (PGOGenerateArg &&
720 PGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
721 PGOGenerateArg = nullptr;
723 auto *ProfileGenerateArg = Args.getLastArg(
724 options::OPT_fprofile_instr_generate,
725 options::OPT_fprofile_instr_generate_EQ,
726 options::OPT_fno_profile_instr_generate);
727 if (ProfileGenerateArg &&
728 ProfileGenerateArg->getOption().matches(
729 options::OPT_fno_profile_instr_generate))
730 ProfileGenerateArg = nullptr;
732 if (PGOGenerateArg && ProfileGenerateArg)
733 D.Diag(diag::err_drv_argument_not_allowed_with)
734 << PGOGenerateArg->getSpelling() << ProfileGenerateArg->getSpelling();
736 auto *ProfileUseArg = getLastProfileUseArg(Args);
738 if (PGOGenerateArg && ProfileUseArg)
739 D.Diag(diag::err_drv_argument_not_allowed_with)
740 << ProfileUseArg->getSpelling() << PGOGenerateArg->getSpelling();
742 if (ProfileGenerateArg && ProfileUseArg)
743 D.Diag(diag::err_drv_argument_not_allowed_with)
744 << ProfileGenerateArg->getSpelling() << ProfileUseArg->getSpelling();
746 if (ProfileGenerateArg) {
747 if (ProfileGenerateArg->getOption().matches(
748 options::OPT_fprofile_instr_generate_EQ))
749 CmdArgs.push_back(Args.MakeArgString(Twine("-fprofile-instrument-path=") +
750 ProfileGenerateArg->getValue()));
751 // The default is to use Clang Instrumentation.
752 CmdArgs.push_back("-fprofile-instrument=clang");
755 if (PGOGenerateArg) {
756 CmdArgs.push_back("-fprofile-instrument=llvm");
757 if (PGOGenerateArg->getOption().matches(
758 options::OPT_fprofile_generate_EQ)) {
759 SmallString<128> Path(PGOGenerateArg->getValue());
760 llvm::sys::path::append(Path, "default_%m.profraw");
762 Args.MakeArgString(Twine("-fprofile-instrument-path=") + Path));
767 if (ProfileUseArg->getOption().matches(options::OPT_fprofile_instr_use_EQ))
768 CmdArgs.push_back(Args.MakeArgString(
769 Twine("-fprofile-instrument-use-path=") + ProfileUseArg->getValue()));
770 else if ((ProfileUseArg->getOption().matches(
771 options::OPT_fprofile_use_EQ) ||
772 ProfileUseArg->getOption().matches(
773 options::OPT_fprofile_instr_use))) {
774 SmallString<128> Path(
775 ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue());
776 if (Path.empty() || llvm::sys::fs::is_directory(Path))
777 llvm::sys::path::append(Path, "default.profdata");
779 Args.MakeArgString(Twine("-fprofile-instrument-use-path=") + Path));
783 if (Args.hasArg(options::OPT_ftest_coverage) ||
784 Args.hasArg(options::OPT_coverage))
785 CmdArgs.push_back("-femit-coverage-notes");
786 if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
788 Args.hasArg(options::OPT_coverage))
789 CmdArgs.push_back("-femit-coverage-data");
791 if (Args.hasFlag(options::OPT_fcoverage_mapping,
792 options::OPT_fno_coverage_mapping, false)) {
793 if (!ProfileGenerateArg)
794 D.Diag(clang::diag::err_drv_argument_only_allowed_with)
795 << "-fcoverage-mapping"
796 << "-fprofile-instr-generate";
798 CmdArgs.push_back("-fcoverage-mapping");
801 if (C.getArgs().hasArg(options::OPT_c) ||
802 C.getArgs().hasArg(options::OPT_S)) {
803 if (Output.isFilename()) {
804 CmdArgs.push_back("-coverage-notes-file");
805 SmallString<128> OutputFilename;
806 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
807 OutputFilename = FinalOutput->getValue();
809 OutputFilename = llvm::sys::path::filename(Output.getBaseInput());
810 SmallString<128> CoverageFilename = OutputFilename;
811 if (llvm::sys::path::is_relative(CoverageFilename)) {
812 SmallString<128> Pwd;
813 if (!llvm::sys::fs::current_path(Pwd)) {
814 llvm::sys::path::append(Pwd, CoverageFilename);
815 CoverageFilename.swap(Pwd);
818 llvm::sys::path::replace_extension(CoverageFilename, "gcno");
819 CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
821 // Leave -fprofile-dir= an unused argument unless .gcda emission is
822 // enabled. To be polite, with '-fprofile-arcs -fno-profile-arcs' consider
823 // the flag used. There is no -fno-profile-dir, so the user has no
824 // targeted way to suppress the warning.
825 if (Args.hasArg(options::OPT_fprofile_arcs) ||
826 Args.hasArg(options::OPT_coverage)) {
827 CmdArgs.push_back("-coverage-data-file");
828 if (Arg *FProfileDir = Args.getLastArg(options::OPT_fprofile_dir)) {
829 CoverageFilename = FProfileDir->getValue();
830 llvm::sys::path::append(CoverageFilename, OutputFilename);
832 llvm::sys::path::replace_extension(CoverageFilename, "gcda");
833 CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
839 /// \brief Check whether the given input tree contains any compilation actions.
840 static bool ContainsCompileAction(const Action *A) {
841 if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A))
844 for (const auto &AI : A->inputs())
845 if (ContainsCompileAction(AI))
851 /// \brief Check if -relax-all should be passed to the internal assembler.
852 /// This is done by default when compiling non-assembler source with -O0.
853 static bool UseRelaxAll(Compilation &C, const ArgList &Args) {
854 bool RelaxDefault = true;
856 if (Arg *A = Args.getLastArg(options::OPT_O_Group))
857 RelaxDefault = A->getOption().matches(options::OPT_O0);
860 RelaxDefault = false;
861 for (const auto &Act : C.getActions()) {
862 if (ContainsCompileAction(Act)) {
869 return Args.hasFlag(options::OPT_mrelax_all, options::OPT_mno_relax_all,
873 // Extract the integer N from a string spelled "-dwarf-N", returning 0
874 // on mismatch. The StringRef input (rather than an Arg) allows
875 // for use by the "-Xassembler" option parser.
876 static unsigned DwarfVersionNum(StringRef ArgValue) {
877 return llvm::StringSwitch<unsigned>(ArgValue)
878 .Case("-gdwarf-2", 2)
879 .Case("-gdwarf-3", 3)
880 .Case("-gdwarf-4", 4)
881 .Case("-gdwarf-5", 5)
885 static void RenderDebugEnablingArgs(const ArgList &Args, ArgStringList &CmdArgs,
886 codegenoptions::DebugInfoKind DebugInfoKind,
887 unsigned DwarfVersion,
888 llvm::DebuggerKind DebuggerTuning) {
889 switch (DebugInfoKind) {
890 case codegenoptions::DebugLineTablesOnly:
891 CmdArgs.push_back("-debug-info-kind=line-tables-only");
893 case codegenoptions::LimitedDebugInfo:
894 CmdArgs.push_back("-debug-info-kind=limited");
896 case codegenoptions::FullDebugInfo:
897 CmdArgs.push_back("-debug-info-kind=standalone");
902 if (DwarfVersion > 0)
904 Args.MakeArgString("-dwarf-version=" + Twine(DwarfVersion)));
905 switch (DebuggerTuning) {
906 case llvm::DebuggerKind::GDB:
907 CmdArgs.push_back("-debugger-tuning=gdb");
909 case llvm::DebuggerKind::LLDB:
910 CmdArgs.push_back("-debugger-tuning=lldb");
912 case llvm::DebuggerKind::SCE:
913 CmdArgs.push_back("-debugger-tuning=sce");
920 static void RenderDebugInfoCompressionArgs(const ArgList &Args,
921 ArgStringList &CmdArgs,
923 const Arg *A = Args.getLastArg(options::OPT_gz, options::OPT_gz_EQ);
927 if (A->getOption().getID() == options::OPT_gz) {
928 if (llvm::zlib::isAvailable())
929 CmdArgs.push_back("-compress-debug-sections");
931 D.Diag(diag::warn_debug_compression_unavailable);
935 StringRef Value = A->getValue();
936 if (Value == "none") {
937 CmdArgs.push_back("-compress-debug-sections=none");
938 } else if (Value == "zlib" || Value == "zlib-gnu") {
939 if (llvm::zlib::isAvailable()) {
941 Args.MakeArgString("-compress-debug-sections=" + Twine(Value)));
943 D.Diag(diag::warn_debug_compression_unavailable);
946 D.Diag(diag::err_drv_unsupported_option_argument)
947 << A->getOption().getName() << Value;
951 static const char *RelocationModelName(llvm::Reloc::Model Model) {
953 case llvm::Reloc::Static:
955 case llvm::Reloc::PIC_:
957 case llvm::Reloc::DynamicNoPIC:
958 return "dynamic-no-pic";
959 case llvm::Reloc::ROPI:
961 case llvm::Reloc::RWPI:
963 case llvm::Reloc::ROPI_RWPI:
966 llvm_unreachable("Unknown Reloc::Model kind");
969 void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA,
970 const Driver &D, const ArgList &Args,
971 ArgStringList &CmdArgs,
972 const InputInfo &Output,
973 const InputInfoList &Inputs) const {
975 const bool IsIAMCU = getToolChain().getTriple().isOSIAMCU();
977 CheckPreprocessingOptions(D, Args);
979 Args.AddLastArg(CmdArgs, options::OPT_C);
980 Args.AddLastArg(CmdArgs, options::OPT_CC);
982 // Handle dependency file generation.
983 if ((A = Args.getLastArg(options::OPT_M, options::OPT_MM)) ||
984 (A = Args.getLastArg(options::OPT_MD)) ||
985 (A = Args.getLastArg(options::OPT_MMD))) {
986 // Determine the output location.
988 if (Arg *MF = Args.getLastArg(options::OPT_MF)) {
989 DepFile = MF->getValue();
990 C.addFailureResultFile(DepFile, &JA);
991 } else if (Output.getType() == types::TY_Dependencies) {
992 DepFile = Output.getFilename();
993 } else if (A->getOption().matches(options::OPT_M) ||
994 A->getOption().matches(options::OPT_MM)) {
997 DepFile = getDependencyFileName(Args, Inputs);
998 C.addFailureResultFile(DepFile, &JA);
1000 CmdArgs.push_back("-dependency-file");
1001 CmdArgs.push_back(DepFile);
1003 // Add a default target if one wasn't specified.
1004 if (!Args.hasArg(options::OPT_MT) && !Args.hasArg(options::OPT_MQ)) {
1005 const char *DepTarget;
1007 // If user provided -o, that is the dependency target, except
1008 // when we are only generating a dependency file.
1009 Arg *OutputOpt = Args.getLastArg(options::OPT_o);
1010 if (OutputOpt && Output.getType() != types::TY_Dependencies) {
1011 DepTarget = OutputOpt->getValue();
1013 // Otherwise derive from the base input.
1015 // FIXME: This should use the computed output file location.
1016 SmallString<128> P(Inputs[0].getBaseInput());
1017 llvm::sys::path::replace_extension(P, "o");
1018 DepTarget = Args.MakeArgString(llvm::sys::path::filename(P));
1021 if (!A->getOption().matches(options::OPT_MD) && !A->getOption().matches(options::OPT_MMD)) {
1022 CmdArgs.push_back("-w");
1024 CmdArgs.push_back("-MT");
1025 SmallString<128> Quoted;
1026 QuoteTarget(DepTarget, Quoted);
1027 CmdArgs.push_back(Args.MakeArgString(Quoted));
1030 if (A->getOption().matches(options::OPT_M) ||
1031 A->getOption().matches(options::OPT_MD))
1032 CmdArgs.push_back("-sys-header-deps");
1033 if ((isa<PrecompileJobAction>(JA) &&
1034 !Args.hasArg(options::OPT_fno_module_file_deps)) ||
1035 Args.hasArg(options::OPT_fmodule_file_deps))
1036 CmdArgs.push_back("-module-file-deps");
1039 if (Args.hasArg(options::OPT_MG)) {
1040 if (!A || A->getOption().matches(options::OPT_MD) ||
1041 A->getOption().matches(options::OPT_MMD))
1042 D.Diag(diag::err_drv_mg_requires_m_or_mm);
1043 CmdArgs.push_back("-MG");
1046 Args.AddLastArg(CmdArgs, options::OPT_MP);
1047 Args.AddLastArg(CmdArgs, options::OPT_MV);
1049 // Convert all -MQ <target> args to -MT <quoted target>
1050 for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) {
1053 if (A->getOption().matches(options::OPT_MQ)) {
1054 CmdArgs.push_back("-MT");
1055 SmallString<128> Quoted;
1056 QuoteTarget(A->getValue(), Quoted);
1057 CmdArgs.push_back(Args.MakeArgString(Quoted));
1059 // -MT flag - no change
1061 A->render(Args, CmdArgs);
1065 // Add offload include arguments specific for CUDA. This must happen before
1066 // we -I or -include anything else, because we must pick up the CUDA headers
1067 // from the particular CUDA installation, rather than from e.g.
1068 // /usr/local/include.
1069 if (JA.isOffloading(Action::OFK_Cuda))
1070 getToolChain().AddCudaIncludeArgs(Args, CmdArgs);
1072 // Add -i* options, and automatically translate to
1073 // -include-pch/-include-pth for transparent PCH support. It's
1074 // wonky, but we include looking for .gch so we can support seamless
1075 // replacement into a build system already set up to be generating
1077 int YcIndex = -1, YuIndex = -1;
1080 const Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
1081 const Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
1082 for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) {
1083 // Walk the whole i_Group and skip non "-include" flags so that the index
1084 // here matches the index in the next loop below.
1086 if (!A->getOption().matches(options::OPT_include))
1088 if (YcArg && strcmp(A->getValue(), YcArg->getValue()) == 0)
1090 if (YuArg && strcmp(A->getValue(), YuArg->getValue()) == 0)
1094 if (isa<PrecompileJobAction>(JA) && YcIndex != -1) {
1095 Driver::InputList Inputs;
1096 D.BuildInputs(getToolChain(), C.getArgs(), Inputs);
1097 assert(Inputs.size() == 1 && "Need one input when building pch");
1098 CmdArgs.push_back(Args.MakeArgString(Twine("-find-pch-source=") +
1099 Inputs[0].second->getValue()));
1102 bool RenderedImplicitInclude = false;
1104 for (const Arg *A : Args.filtered(options::OPT_clang_i_Group)) {
1107 if (getToolChain().getDriver().IsCLMode() &&
1108 A->getOption().matches(options::OPT_include)) {
1109 // In clang-cl mode, /Ycfoo.h means that all code up to a foo.h
1110 // include is compiled into foo.h, and everything after goes into
1111 // the .obj file. /Yufoo.h means that all includes prior to and including
1112 // foo.h are completely skipped and replaced with a use of the pch file
1113 // for foo.h. (Each flag can have at most one value, multiple /Yc flags
1114 // just mean that the last one wins.) If /Yc and /Yu are both present
1115 // and refer to the same file, /Yc wins.
1116 // Note that OPT__SLASH_FI gets mapped to OPT_include.
1117 // FIXME: The code here assumes that /Yc and /Yu refer to the same file.
1118 // cl.exe seems to support both flags with different values, but that
1119 // seems strange (which flag does /Fp now refer to?), so don't implement
1120 // that until someone needs it.
1121 int PchIndex = YcIndex != -1 ? YcIndex : YuIndex;
1122 if (PchIndex != -1) {
1123 if (isa<PrecompileJobAction>(JA)) {
1124 // When building the pch, skip all includes after the pch.
1125 assert(YcIndex != -1 && PchIndex == YcIndex);
1129 // When using the pch, skip all includes prior to the pch.
1130 if (AI < PchIndex) {
1134 if (AI == PchIndex) {
1136 CmdArgs.push_back("-include-pch");
1138 Args.MakeArgString(D.GetClPchPath(C, A->getValue())));
1143 } else if (A->getOption().matches(options::OPT_include)) {
1144 // Handling of gcc-style gch precompiled headers.
1145 bool IsFirstImplicitInclude = !RenderedImplicitInclude;
1146 RenderedImplicitInclude = true;
1148 // Use PCH if the user requested it.
1149 bool UsePCH = D.CCCUsePCH;
1151 bool FoundPTH = false;
1152 bool FoundPCH = false;
1153 SmallString<128> P(A->getValue());
1154 // We want the files to have a name like foo.h.pch. Add a dummy extension
1155 // so that replace_extension does the right thing.
1158 llvm::sys::path::replace_extension(P, "pch");
1159 if (llvm::sys::fs::exists(P))
1164 llvm::sys::path::replace_extension(P, "pth");
1165 if (llvm::sys::fs::exists(P))
1169 if (!FoundPCH && !FoundPTH) {
1170 llvm::sys::path::replace_extension(P, "gch");
1171 if (llvm::sys::fs::exists(P)) {
1177 if (FoundPCH || FoundPTH) {
1178 if (IsFirstImplicitInclude) {
1181 CmdArgs.push_back("-include-pch");
1183 CmdArgs.push_back("-include-pth");
1184 CmdArgs.push_back(Args.MakeArgString(P));
1187 // Ignore the PCH if not first on command line and emit warning.
1188 D.Diag(diag::warn_drv_pch_not_first_include) << P
1189 << A->getAsString(Args);
1192 } else if (A->getOption().matches(options::OPT_isystem_after)) {
1193 // Handling of paths which must come late. These entries are handled by
1194 // the toolchain itself after the resource dir is inserted in the right
1196 // Do not claim the argument so that the use of the argument does not
1197 // silently go unnoticed on toolchains which do not honour the option.
1201 // Not translated, render as usual.
1203 A->render(Args, CmdArgs);
1206 Args.AddAllArgs(CmdArgs,
1207 {options::OPT_D, options::OPT_U, options::OPT_I_Group,
1208 options::OPT_F, options::OPT_index_header_map});
1210 // Add -Wp, and -Xpreprocessor if using the preprocessor.
1212 // FIXME: There is a very unfortunate problem here, some troubled
1213 // souls abuse -Wp, to pass preprocessor options in gcc syntax. To
1214 // really support that we would have to parse and then translate
1215 // those options. :(
1216 Args.AddAllArgValues(CmdArgs, options::OPT_Wp_COMMA,
1217 options::OPT_Xpreprocessor);
1219 // -I- is a deprecated GCC feature, reject it.
1220 if (Arg *A = Args.getLastArg(options::OPT_I_))
1221 D.Diag(diag::err_drv_I_dash_not_supported) << A->getAsString(Args);
1223 // If we have a --sysroot, and don't have an explicit -isysroot flag, add an
1224 // -isysroot to the CC1 invocation.
1225 StringRef sysroot = C.getSysRoot();
1226 if (sysroot != "") {
1227 if (!Args.hasArg(options::OPT_isysroot)) {
1228 CmdArgs.push_back("-isysroot");
1229 CmdArgs.push_back(C.getArgs().MakeArgString(sysroot));
1233 // Parse additional include paths from environment variables.
1234 // FIXME: We should probably sink the logic for handling these from the
1235 // frontend into the driver. It will allow deleting 4 otherwise unused flags.
1236 // CPATH - included following the user specified includes (but prior to
1237 // builtin and standard includes).
1238 addDirectoryList(Args, CmdArgs, "-I", "CPATH");
1239 // C_INCLUDE_PATH - system includes enabled when compiling C.
1240 addDirectoryList(Args, CmdArgs, "-c-isystem", "C_INCLUDE_PATH");
1241 // CPLUS_INCLUDE_PATH - system includes enabled when compiling C++.
1242 addDirectoryList(Args, CmdArgs, "-cxx-isystem", "CPLUS_INCLUDE_PATH");
1243 // OBJC_INCLUDE_PATH - system includes enabled when compiling ObjC.
1244 addDirectoryList(Args, CmdArgs, "-objc-isystem", "OBJC_INCLUDE_PATH");
1245 // OBJCPLUS_INCLUDE_PATH - system includes enabled when compiling ObjC++.
1246 addDirectoryList(Args, CmdArgs, "-objcxx-isystem", "OBJCPLUS_INCLUDE_PATH");
1248 // While adding the include arguments, we also attempt to retrieve the
1249 // arguments of related offloading toolchains or arguments that are specific
1250 // of an offloading programming model.
1252 // Add C++ include arguments, if needed.
1253 if (types::isCXX(Inputs[0].getType()))
1254 forAllAssociatedToolChains(C, JA, getToolChain(),
1255 [&Args, &CmdArgs](const ToolChain &TC) {
1256 TC.AddClangCXXStdlibIncludeArgs(Args, CmdArgs);
1259 // Add system include arguments for all targets but IAMCU.
1261 forAllAssociatedToolChains(C, JA, getToolChain(),
1262 [&Args, &CmdArgs](const ToolChain &TC) {
1263 TC.AddClangSystemIncludeArgs(Args, CmdArgs);
1266 // For IAMCU add special include arguments.
1267 getToolChain().AddIAMCUIncludeArgs(Args, CmdArgs);
1271 // FIXME: Move to target hook.
1272 static bool isSignedCharDefault(const llvm::Triple &Triple) {
1273 switch (Triple.getArch()) {
1277 case llvm::Triple::aarch64:
1278 case llvm::Triple::aarch64_be:
1279 case llvm::Triple::arm:
1280 case llvm::Triple::armeb:
1281 case llvm::Triple::thumb:
1282 case llvm::Triple::thumbeb:
1283 if (Triple.isOSDarwin() || Triple.isOSWindows())
1287 case llvm::Triple::ppc:
1288 case llvm::Triple::ppc64:
1289 if (Triple.isOSDarwin())
1293 case llvm::Triple::hexagon:
1294 case llvm::Triple::ppc64le:
1295 case llvm::Triple::systemz:
1296 case llvm::Triple::xcore:
1301 static bool isNoCommonDefault(const llvm::Triple &Triple) {
1302 switch (Triple.getArch()) {
1306 case llvm::Triple::xcore:
1307 case llvm::Triple::wasm32:
1308 case llvm::Triple::wasm64:
1313 void Clang::AddARMTargetArgs(const llvm::Triple &Triple, const ArgList &Args,
1314 ArgStringList &CmdArgs, bool KernelOrKext) const {
1315 // Select the ABI to use.
1316 // FIXME: Support -meabi.
1317 // FIXME: Parts of this are duplicated in the backend, unify this somehow.
1318 const char *ABIName = nullptr;
1319 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1320 ABIName = A->getValue();
1322 std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
1323 ABIName = llvm::ARM::computeDefaultTargetABI(Triple, CPU).data();
1326 CmdArgs.push_back("-target-abi");
1327 CmdArgs.push_back(ABIName);
1329 // Determine floating point ABI from the options & target defaults.
1330 arm::FloatABI ABI = arm::getARMFloatABI(getToolChain(), Args);
1331 if (ABI == arm::FloatABI::Soft) {
1332 // Floating point operations and argument passing are soft.
1333 // FIXME: This changes CPP defines, we need -target-soft-float.
1334 CmdArgs.push_back("-msoft-float");
1335 CmdArgs.push_back("-mfloat-abi");
1336 CmdArgs.push_back("soft");
1337 } else if (ABI == arm::FloatABI::SoftFP) {
1338 // Floating point operations are hard, but argument passing is soft.
1339 CmdArgs.push_back("-mfloat-abi");
1340 CmdArgs.push_back("soft");
1342 // Floating point operations and argument passing are hard.
1343 assert(ABI == arm::FloatABI::Hard && "Invalid float abi!");
1344 CmdArgs.push_back("-mfloat-abi");
1345 CmdArgs.push_back("hard");
1348 // Forward the -mglobal-merge option for explicit control over the pass.
1349 if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1350 options::OPT_mno_global_merge)) {
1351 CmdArgs.push_back("-backend-option");
1352 if (A->getOption().matches(options::OPT_mno_global_merge))
1353 CmdArgs.push_back("-arm-global-merge=false");
1355 CmdArgs.push_back("-arm-global-merge=true");
1358 if (!Args.hasFlag(options::OPT_mimplicit_float,
1359 options::OPT_mno_implicit_float, true))
1360 CmdArgs.push_back("-no-implicit-float");
1363 void Clang::AddAArch64TargetArgs(const ArgList &Args,
1364 ArgStringList &CmdArgs) const {
1365 const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
1367 if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1368 Args.hasArg(options::OPT_mkernel) ||
1369 Args.hasArg(options::OPT_fapple_kext))
1370 CmdArgs.push_back("-disable-red-zone");
1372 if (!Args.hasFlag(options::OPT_mimplicit_float,
1373 options::OPT_mno_implicit_float, true))
1374 CmdArgs.push_back("-no-implicit-float");
1376 const char *ABIName = nullptr;
1377 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1378 ABIName = A->getValue();
1379 else if (Triple.isOSDarwin())
1380 ABIName = "darwinpcs";
1384 CmdArgs.push_back("-target-abi");
1385 CmdArgs.push_back(ABIName);
1387 if (Arg *A = Args.getLastArg(options::OPT_mfix_cortex_a53_835769,
1388 options::OPT_mno_fix_cortex_a53_835769)) {
1389 CmdArgs.push_back("-backend-option");
1390 if (A->getOption().matches(options::OPT_mfix_cortex_a53_835769))
1391 CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
1393 CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=0");
1394 } else if (Triple.isAndroid()) {
1395 // Enabled A53 errata (835769) workaround by default on android
1396 CmdArgs.push_back("-backend-option");
1397 CmdArgs.push_back("-aarch64-fix-cortex-a53-835769=1");
1400 // Forward the -mglobal-merge option for explicit control over the pass.
1401 if (Arg *A = Args.getLastArg(options::OPT_mglobal_merge,
1402 options::OPT_mno_global_merge)) {
1403 CmdArgs.push_back("-backend-option");
1404 if (A->getOption().matches(options::OPT_mno_global_merge))
1405 CmdArgs.push_back("-aarch64-enable-global-merge=false");
1407 CmdArgs.push_back("-aarch64-enable-global-merge=true");
1411 void Clang::AddMIPSTargetArgs(const ArgList &Args,
1412 ArgStringList &CmdArgs) const {
1413 const Driver &D = getToolChain().getDriver();
1416 const llvm::Triple &Triple = getToolChain().getTriple();
1417 mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
1419 CmdArgs.push_back("-target-abi");
1420 CmdArgs.push_back(ABIName.data());
1422 mips::FloatABI ABI = mips::getMipsFloatABI(D, Args);
1423 if (ABI == mips::FloatABI::Soft) {
1424 // Floating point operations and argument passing are soft.
1425 CmdArgs.push_back("-msoft-float");
1426 CmdArgs.push_back("-mfloat-abi");
1427 CmdArgs.push_back("soft");
1429 // Floating point operations and argument passing are hard.
1430 assert(ABI == mips::FloatABI::Hard && "Invalid float abi!");
1431 CmdArgs.push_back("-mfloat-abi");
1432 CmdArgs.push_back("hard");
1435 if (Arg *A = Args.getLastArg(options::OPT_mxgot, options::OPT_mno_xgot)) {
1436 if (A->getOption().matches(options::OPT_mxgot)) {
1437 CmdArgs.push_back("-mllvm");
1438 CmdArgs.push_back("-mxgot");
1442 if (Arg *A = Args.getLastArg(options::OPT_mldc1_sdc1,
1443 options::OPT_mno_ldc1_sdc1)) {
1444 if (A->getOption().matches(options::OPT_mno_ldc1_sdc1)) {
1445 CmdArgs.push_back("-mllvm");
1446 CmdArgs.push_back("-mno-ldc1-sdc1");
1450 if (Arg *A = Args.getLastArg(options::OPT_mcheck_zero_division,
1451 options::OPT_mno_check_zero_division)) {
1452 if (A->getOption().matches(options::OPT_mno_check_zero_division)) {
1453 CmdArgs.push_back("-mllvm");
1454 CmdArgs.push_back("-mno-check-zero-division");
1458 if (Arg *A = Args.getLastArg(options::OPT_G)) {
1459 StringRef v = A->getValue();
1460 CmdArgs.push_back("-mllvm");
1461 CmdArgs.push_back(Args.MakeArgString("-mips-ssection-threshold=" + v));
1465 if (Arg *A = Args.getLastArg(options::OPT_mcompact_branches_EQ)) {
1466 StringRef Val = StringRef(A->getValue());
1467 if (mips::hasCompactBranches(CPUName)) {
1468 if (Val == "never" || Val == "always" || Val == "optimal") {
1469 CmdArgs.push_back("-mllvm");
1470 CmdArgs.push_back(Args.MakeArgString("-mips-compact-branches=" + Val));
1472 D.Diag(diag::err_drv_unsupported_option_argument)
1473 << A->getOption().getName() << Val;
1475 D.Diag(diag::warn_target_unsupported_compact_branches) << CPUName;
1479 void Clang::AddPPCTargetArgs(const ArgList &Args,
1480 ArgStringList &CmdArgs) const {
1481 // Select the ABI to use.
1482 const char *ABIName = nullptr;
1483 if (getToolChain().getTriple().isOSLinux())
1484 switch (getToolChain().getArch()) {
1485 case llvm::Triple::ppc64: {
1486 // When targeting a processor that supports QPX, or if QPX is
1487 // specifically enabled, default to using the ABI that supports QPX (so
1488 // long as it is not specifically disabled).
1489 bool HasQPX = false;
1490 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
1491 HasQPX = A->getValue() == StringRef("a2q");
1492 HasQPX = Args.hasFlag(options::OPT_mqpx, options::OPT_mno_qpx, HasQPX);
1494 ABIName = "elfv1-qpx";
1501 case llvm::Triple::ppc64le:
1508 if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
1509 // The ppc64 linux abis are all "altivec" abis by default. Accept and ignore
1510 // the option if given as we don't have backend support for any targets
1511 // that don't use the altivec abi.
1512 if (StringRef(A->getValue()) != "altivec")
1513 ABIName = A->getValue();
1515 ppc::FloatABI FloatABI =
1516 ppc::getPPCFloatABI(getToolChain().getDriver(), Args);
1518 if (FloatABI == ppc::FloatABI::Soft) {
1519 // Floating point operations and argument passing are soft.
1520 CmdArgs.push_back("-msoft-float");
1521 CmdArgs.push_back("-mfloat-abi");
1522 CmdArgs.push_back("soft");
1524 // Floating point operations and argument passing are hard.
1525 assert(FloatABI == ppc::FloatABI::Hard && "Invalid float abi!");
1526 CmdArgs.push_back("-mfloat-abi");
1527 CmdArgs.push_back("hard");
1531 CmdArgs.push_back("-target-abi");
1532 CmdArgs.push_back(ABIName);
1536 void Clang::AddSparcTargetArgs(const ArgList &Args,
1537 ArgStringList &CmdArgs) const {
1538 sparc::FloatABI FloatABI =
1539 sparc::getSparcFloatABI(getToolChain().getDriver(), Args);
1541 if (FloatABI == sparc::FloatABI::Soft) {
1542 // Floating point operations and argument passing are soft.
1543 CmdArgs.push_back("-msoft-float");
1544 CmdArgs.push_back("-mfloat-abi");
1545 CmdArgs.push_back("soft");
1547 // Floating point operations and argument passing are hard.
1548 assert(FloatABI == sparc::FloatABI::Hard && "Invalid float abi!");
1549 CmdArgs.push_back("-mfloat-abi");
1550 CmdArgs.push_back("hard");
1554 void Clang::AddSystemZTargetArgs(const ArgList &Args,
1555 ArgStringList &CmdArgs) const {
1556 if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false))
1557 CmdArgs.push_back("-mbackchain");
1560 void Clang::AddX86TargetArgs(const ArgList &Args,
1561 ArgStringList &CmdArgs) const {
1562 if (!Args.hasFlag(options::OPT_mred_zone, options::OPT_mno_red_zone, true) ||
1563 Args.hasArg(options::OPT_mkernel) ||
1564 Args.hasArg(options::OPT_fapple_kext))
1565 CmdArgs.push_back("-disable-red-zone");
1567 // Default to avoid implicit floating-point for kernel/kext code, but allow
1568 // that to be overridden with -mno-soft-float.
1569 bool NoImplicitFloat = (Args.hasArg(options::OPT_mkernel) ||
1570 Args.hasArg(options::OPT_fapple_kext));
1571 if (Arg *A = Args.getLastArg(
1572 options::OPT_msoft_float, options::OPT_mno_soft_float,
1573 options::OPT_mimplicit_float, options::OPT_mno_implicit_float)) {
1574 const Option &O = A->getOption();
1575 NoImplicitFloat = (O.matches(options::OPT_mno_implicit_float) ||
1576 O.matches(options::OPT_msoft_float));
1578 if (NoImplicitFloat)
1579 CmdArgs.push_back("-no-implicit-float");
1581 if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
1582 StringRef Value = A->getValue();
1583 if (Value == "intel" || Value == "att") {
1584 CmdArgs.push_back("-mllvm");
1585 CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
1587 getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
1588 << A->getOption().getName() << Value;
1592 // Set flags to support MCU ABI.
1593 if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
1594 CmdArgs.push_back("-mfloat-abi");
1595 CmdArgs.push_back("soft");
1596 CmdArgs.push_back("-mstack-alignment=4");
1600 void Clang::AddHexagonTargetArgs(const ArgList &Args,
1601 ArgStringList &CmdArgs) const {
1602 CmdArgs.push_back("-mqdsp6-compat");
1603 CmdArgs.push_back("-Wreturn-type");
1605 if (auto G = toolchains::HexagonToolChain::getSmallDataThreshold(Args)) {
1606 std::string N = llvm::utostr(G.getValue());
1607 std::string Opt = std::string("-hexagon-small-data-threshold=") + N;
1608 CmdArgs.push_back("-mllvm");
1609 CmdArgs.push_back(Args.MakeArgString(Opt));
1612 if (!Args.hasArg(options::OPT_fno_short_enums))
1613 CmdArgs.push_back("-fshort-enums");
1614 if (Args.getLastArg(options::OPT_mieee_rnd_near)) {
1615 CmdArgs.push_back("-mllvm");
1616 CmdArgs.push_back("-enable-hexagon-ieee-rnd-near");
1618 CmdArgs.push_back("-mllvm");
1619 CmdArgs.push_back("-machine-sink-split=0");
1622 void Clang::AddLanaiTargetArgs(const ArgList &Args,
1623 ArgStringList &CmdArgs) const {
1624 if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
1625 StringRef CPUName = A->getValue();
1627 CmdArgs.push_back("-target-cpu");
1628 CmdArgs.push_back(Args.MakeArgString(CPUName));
1630 if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
1631 StringRef Value = A->getValue();
1632 // Only support mregparm=4 to support old usage. Report error for all other
1635 if (Value.getAsInteger(10, Mregparm)) {
1636 if (Mregparm != 4) {
1637 getToolChain().getDriver().Diag(
1638 diag::err_drv_unsupported_option_argument)
1639 << A->getOption().getName() << Value;
1645 void Clang::AddWebAssemblyTargetArgs(const ArgList &Args,
1646 ArgStringList &CmdArgs) const {
1647 // Default to "hidden" visibility.
1648 if (!Args.hasArg(options::OPT_fvisibility_EQ,
1649 options::OPT_fvisibility_ms_compat)) {
1650 CmdArgs.push_back("-fvisibility");
1651 CmdArgs.push_back("hidden");
1655 void Clang::DumpCompilationDatabase(Compilation &C, StringRef Filename,
1656 StringRef Target, const InputInfo &Output,
1657 const InputInfo &Input, const ArgList &Args) const {
1658 // If this is a dry run, do not create the compilation database file.
1659 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1662 using llvm::yaml::escape;
1663 const Driver &D = getToolChain().getDriver();
1665 if (!CompilationDatabase) {
1667 auto File = llvm::make_unique<llvm::raw_fd_ostream>(Filename, EC, llvm::sys::fs::F_Text);
1669 D.Diag(clang::diag::err_drv_compilationdatabase) << Filename
1673 CompilationDatabase = std::move(File);
1675 auto &CDB = *CompilationDatabase;
1676 SmallString<128> Buf;
1677 if (llvm::sys::fs::current_path(Buf))
1679 CDB << "{ \"directory\": \"" << escape(Buf) << "\"";
1680 CDB << ", \"file\": \"" << escape(Input.getFilename()) << "\"";
1681 CDB << ", \"output\": \"" << escape(Output.getFilename()) << "\"";
1682 CDB << ", \"arguments\": [\"" << escape(D.ClangExecutable) << "\"";
1684 Buf += types::getTypeName(Input.getType());
1685 CDB << ", \"" << escape(Buf) << "\"";
1686 if (!D.SysRoot.empty() && !Args.hasArg(options::OPT__sysroot_EQ)) {
1689 CDB << ", \"" << escape(Buf) << "\"";
1691 CDB << ", \"" << escape(Input.getFilename()) << "\"";
1692 for (auto &A: Args) {
1693 auto &O = A->getOption();
1694 // Skip language selection, which is positional.
1695 if (O.getID() == options::OPT_x)
1697 // Skip writing dependency output and the compilation database itself.
1698 if (O.getGroup().isValid() && O.getGroup().getID() == options::OPT_M_Group)
1701 if (O.getKind() == Option::InputClass)
1703 // All other arguments are quoted and appended.
1705 A->render(Args, ASL);
1707 CDB << ", \"" << escape(it) << "\"";
1711 CDB << ", \"" << escape(Buf) << "\"]},\n";
1714 static void CollectArgsForIntegratedAssembler(Compilation &C,
1715 const ArgList &Args,
1716 ArgStringList &CmdArgs,
1718 if (UseRelaxAll(C, Args))
1719 CmdArgs.push_back("-mrelax-all");
1721 // Only default to -mincremental-linker-compatible if we think we are
1722 // targeting the MSVC linker.
1723 bool DefaultIncrementalLinkerCompatible =
1724 C.getDefaultToolChain().getTriple().isWindowsMSVCEnvironment();
1725 if (Args.hasFlag(options::OPT_mincremental_linker_compatible,
1726 options::OPT_mno_incremental_linker_compatible,
1727 DefaultIncrementalLinkerCompatible))
1728 CmdArgs.push_back("-mincremental-linker-compatible");
1730 switch (C.getDefaultToolChain().getArch()) {
1731 case llvm::Triple::arm:
1732 case llvm::Triple::armeb:
1733 case llvm::Triple::thumb:
1734 case llvm::Triple::thumbeb:
1735 if (Arg *A = Args.getLastArg(options::OPT_mimplicit_it_EQ)) {
1736 StringRef Value = A->getValue();
1737 if (Value == "always" || Value == "never" || Value == "arm" ||
1739 CmdArgs.push_back("-mllvm");
1740 CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value));
1742 D.Diag(diag::err_drv_unsupported_option_argument)
1743 << A->getOption().getName() << Value;
1751 // When passing -I arguments to the assembler we sometimes need to
1752 // unconditionally take the next argument. For example, when parsing
1753 // '-Wa,-I -Wa,foo' we need to accept the -Wa,foo arg after seeing the
1754 // -Wa,-I arg and when parsing '-Wa,-I,foo' we need to accept the 'foo'
1755 // arg after parsing the '-I' arg.
1756 bool TakeNextArg = false;
1758 bool UseRelaxRelocations = ENABLE_X86_RELAX_RELOCATIONS;
1759 const char *MipsTargetFeature = nullptr;
1761 Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) {
1764 for (StringRef Value : A->getValues()) {
1766 CmdArgs.push_back(Value.data());
1767 TakeNextArg = false;
1771 if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() &&
1772 Value == "-mbig-obj")
1773 continue; // LLVM handles bigobj automatically
1775 switch (C.getDefaultToolChain().getArch()) {
1778 case llvm::Triple::mips:
1779 case llvm::Triple::mipsel:
1780 case llvm::Triple::mips64:
1781 case llvm::Triple::mips64el:
1782 if (Value == "--trap") {
1783 CmdArgs.push_back("-target-feature");
1784 CmdArgs.push_back("+use-tcc-in-div");
1787 if (Value == "--break") {
1788 CmdArgs.push_back("-target-feature");
1789 CmdArgs.push_back("-use-tcc-in-div");
1792 if (Value.startswith("-msoft-float")) {
1793 CmdArgs.push_back("-target-feature");
1794 CmdArgs.push_back("+soft-float");
1797 if (Value.startswith("-mhard-float")) {
1798 CmdArgs.push_back("-target-feature");
1799 CmdArgs.push_back("-soft-float");
1803 MipsTargetFeature = llvm::StringSwitch<const char *>(Value)
1804 .Case("-mips1", "+mips1")
1805 .Case("-mips2", "+mips2")
1806 .Case("-mips3", "+mips3")
1807 .Case("-mips4", "+mips4")
1808 .Case("-mips5", "+mips5")
1809 .Case("-mips32", "+mips32")
1810 .Case("-mips32r2", "+mips32r2")
1811 .Case("-mips32r3", "+mips32r3")
1812 .Case("-mips32r5", "+mips32r5")
1813 .Case("-mips32r6", "+mips32r6")
1814 .Case("-mips64", "+mips64")
1815 .Case("-mips64r2", "+mips64r2")
1816 .Case("-mips64r3", "+mips64r3")
1817 .Case("-mips64r5", "+mips64r5")
1818 .Case("-mips64r6", "+mips64r6")
1820 if (MipsTargetFeature)
1824 if (Value == "-force_cpusubtype_ALL") {
1825 // Do nothing, this is the default and we don't support anything else.
1826 } else if (Value == "-L") {
1827 CmdArgs.push_back("-msave-temp-labels");
1828 } else if (Value == "--fatal-warnings") {
1829 CmdArgs.push_back("-massembler-fatal-warnings");
1830 } else if (Value == "--noexecstack") {
1831 CmdArgs.push_back("-mnoexecstack");
1832 } else if (Value.startswith("-compress-debug-sections") ||
1833 Value.startswith("--compress-debug-sections") ||
1834 Value == "-nocompress-debug-sections" ||
1835 Value == "--nocompress-debug-sections") {
1836 CmdArgs.push_back(Value.data());
1837 } else if (Value == "-mrelax-relocations=yes" ||
1838 Value == "--mrelax-relocations=yes") {
1839 UseRelaxRelocations = true;
1840 } else if (Value == "-mrelax-relocations=no" ||
1841 Value == "--mrelax-relocations=no") {
1842 UseRelaxRelocations = false;
1843 } else if (Value.startswith("-I")) {
1844 CmdArgs.push_back(Value.data());
1845 // We need to consume the next argument if the current arg is a plain
1846 // -I. The next arg will be the include directory.
1849 } else if (Value.startswith("-gdwarf-")) {
1850 // "-gdwarf-N" options are not cc1as options.
1851 unsigned DwarfVersion = DwarfVersionNum(Value);
1852 if (DwarfVersion == 0) { // Send it onward, and let cc1as complain.
1853 CmdArgs.push_back(Value.data());
1855 RenderDebugEnablingArgs(Args, CmdArgs,
1856 codegenoptions::LimitedDebugInfo,
1857 DwarfVersion, llvm::DebuggerKind::Default);
1859 } else if (Value.startswith("-mcpu") || Value.startswith("-mfpu") ||
1860 Value.startswith("-mhwdiv") || Value.startswith("-march")) {
1861 // Do nothing, we'll validate it later.
1862 } else if (Value == "-defsym") {
1863 if (A->getNumValues() != 2) {
1864 D.Diag(diag::err_drv_defsym_invalid_format) << Value;
1867 const char *S = A->getValue(1);
1868 auto Pair = StringRef(S).split('=');
1869 auto Sym = Pair.first;
1870 auto SVal = Pair.second;
1872 if (Sym.empty() || SVal.empty()) {
1873 D.Diag(diag::err_drv_defsym_invalid_format) << S;
1877 if (SVal.getAsInteger(0, IVal)) {
1878 D.Diag(diag::err_drv_defsym_invalid_symval) << SVal;
1881 CmdArgs.push_back(Value.data());
1884 D.Diag(diag::err_drv_unsupported_option_argument)
1885 << A->getOption().getName() << Value;
1889 if (UseRelaxRelocations)
1890 CmdArgs.push_back("--mrelax-relocations");
1891 if (MipsTargetFeature != nullptr) {
1892 CmdArgs.push_back("-target-feature");
1893 CmdArgs.push_back(MipsTargetFeature);
1897 void 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();
1904 Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
1905 const Driver &D = getToolChain().getDriver();
1906 ArgStringList CmdArgs;
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
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.");
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();
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.
1932 const llvm::Triple *AuxTriple = getToolChain().getAuxTriple();
1933 IsWindowsMSVC |= AuxTriple && AuxTriple->isWindowsMSVCEnvironment();
1934 IsWindowsGNU |= AuxTriple && AuxTriple->isWindowsGNUEnvironment();
1935 IsWindowsCygnus |= AuxTriple && AuxTriple->isWindowsCygwinEnvironment();
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";
1942 // Invoke ourselves in -cc1 mode.
1944 // FIXME: Implement custom jobs for internal actions.
1945 CmdArgs.push_back("-cc1");
1947 // Add the "effective" target triple.
1948 CmdArgs.push_back("-triple");
1949 CmdArgs.push_back(Args.MakeArgString(TripleStr));
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);
1957 // We have to pass the triple of the host if compiling for a CUDA device and
1959 std::string NormalizedTriple;
1960 if (JA.isDeviceOffloading(Action::OFK_Cuda))
1961 NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Host>()
1965 NormalizedTriple = C.getSingleOffloadToolChain<Action::OFK_Cuda>()
1969 CmdArgs.push_back("-aux-triple");
1970 CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
1973 if (IsOpenMPDevice) {
1974 // We have to pass the triple of the host if compiling for an OpenMP device.
1975 std::string NormalizedTriple =
1976 C.getSingleOffloadToolChain<Action::OFK_Host>()
1979 CmdArgs.push_back("-aux-triple");
1980 CmdArgs.push_back(Args.MakeArgString(NormalizedTriple));
1983 if (Triple.isOSWindows() && (Triple.getArch() == llvm::Triple::arm ||
1984 Triple.getArch() == llvm::Triple::thumb)) {
1985 unsigned Offset = Triple.getArch() == llvm::Triple::arm ? 4 : 6;
1987 Triple.getArchName().substr(Offset).getAsInteger(10, Version);
1989 D.Diag(diag::err_target_unsupported_arch) << Triple.getArchName()
1993 // Push all default warning arguments that are specific to
1994 // the given target. These come before user provided warning options
1996 getToolChain().addClangWarningOptions(CmdArgs);
1998 // Select the appropriate action.
1999 RewriteKind rewriteKind = RK_None;
2001 if (isa<AnalyzeJobAction>(JA)) {
2002 assert(JA.getType() == types::TY_Plist && "Invalid output type.");
2003 CmdArgs.push_back("-analyze");
2004 } else if (isa<MigrateJobAction>(JA)) {
2005 CmdArgs.push_back("-migrate");
2006 } else if (isa<PreprocessJobAction>(JA)) {
2007 if (Output.getType() == types::TY_Dependencies)
2008 CmdArgs.push_back("-Eonly");
2010 CmdArgs.push_back("-E");
2011 if (Args.hasArg(options::OPT_rewrite_objc) &&
2012 !Args.hasArg(options::OPT_g_Group))
2013 CmdArgs.push_back("-P");
2015 } else if (isa<AssembleJobAction>(JA)) {
2016 CmdArgs.push_back("-emit-obj");
2018 CollectArgsForIntegratedAssembler(C, Args, CmdArgs, D);
2020 // Also ignore explicit -force_cpusubtype_ALL option.
2021 (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
2022 } else if (isa<PrecompileJobAction>(JA)) {
2023 // Use PCH if the user requested it.
2024 bool UsePCH = D.CCCUsePCH;
2026 if (JA.getType() == types::TY_Nothing)
2027 CmdArgs.push_back("-fsyntax-only");
2028 else if (JA.getType() == types::TY_ModuleFile)
2029 CmdArgs.push_back("-emit-module-interface");
2031 CmdArgs.push_back("-emit-pch");
2033 CmdArgs.push_back("-emit-pth");
2034 } else if (isa<VerifyPCHJobAction>(JA)) {
2035 CmdArgs.push_back("-verify-pch");
2037 assert((isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) &&
2038 "Invalid action for clang tool.");
2039 if (JA.getType() == types::TY_Nothing) {
2040 CmdArgs.push_back("-fsyntax-only");
2041 } else if (JA.getType() == types::TY_LLVM_IR ||
2042 JA.getType() == types::TY_LTO_IR) {
2043 CmdArgs.push_back("-emit-llvm");
2044 } else if (JA.getType() == types::TY_LLVM_BC ||
2045 JA.getType() == types::TY_LTO_BC) {
2046 CmdArgs.push_back("-emit-llvm-bc");
2047 } else if (JA.getType() == types::TY_PP_Asm) {
2048 CmdArgs.push_back("-S");
2049 } else if (JA.getType() == types::TY_AST) {
2050 CmdArgs.push_back("-emit-pch");
2051 } else if (JA.getType() == types::TY_ModuleFile) {
2052 CmdArgs.push_back("-module-file-info");
2053 } else if (JA.getType() == types::TY_RewrittenObjC) {
2054 CmdArgs.push_back("-rewrite-objc");
2055 rewriteKind = RK_NonFragile;
2056 } else if (JA.getType() == types::TY_RewrittenLegacyObjC) {
2057 CmdArgs.push_back("-rewrite-objc");
2058 rewriteKind = RK_Fragile;
2060 assert(JA.getType() == types::TY_PP_Asm && "Unexpected output type!");
2063 // Preserve use-list order by default when emitting bitcode, so that
2064 // loading the bitcode up in 'opt' or 'llc' and running passes gives the
2065 // same result as running passes here. For LTO, we don't need to preserve
2066 // the use-list order, since serialization to bitcode is part of the flow.
2067 if (JA.getType() == types::TY_LLVM_BC)
2068 CmdArgs.push_back("-emit-llvm-uselists");
2070 if (D.isUsingLTO()) {
2071 Args.AddLastArg(CmdArgs, options::OPT_flto, options::OPT_flto_EQ);
2073 // The Darwin linker currently uses the legacy LTO API, which does not
2074 // support LTO unit features (CFI, whole program vtable opt) under
2076 if (!getToolChain().getTriple().isOSDarwin() ||
2077 D.getLTOMode() == LTOK_Full)
2078 CmdArgs.push_back("-flto-unit");
2082 if (const Arg *A = Args.getLastArg(options::OPT_fthinlto_index_EQ)) {
2083 if (!types::isLLVMIR(Input.getType()))
2084 D.Diag(diag::err_drv_argument_only_allowed_with) << A->getAsString(Args)
2086 Args.AddLastArg(CmdArgs, options::OPT_fthinlto_index_EQ);
2089 // Embed-bitcode option.
2090 if (C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO() &&
2091 (isa<BackendJobAction>(JA) || isa<AssembleJobAction>(JA))) {
2092 // Add flags implied by -fembed-bitcode.
2093 Args.AddLastArg(CmdArgs, options::OPT_fembed_bitcode_EQ);
2094 // Disable all llvm IR level optimizations.
2095 CmdArgs.push_back("-disable-llvm-passes");
2097 if (C.getDriver().embedBitcodeMarkerOnly() && !C.getDriver().isUsingLTO())
2098 CmdArgs.push_back("-fembed-bitcode=marker");
2100 // We normally speed up the clang process a bit by skipping destructors at
2101 // exit, but when we're generating diagnostics we can rely on some of the
2103 if (!C.isForDiagnostics())
2104 CmdArgs.push_back("-disable-free");
2106 // Disable the verification pass in -asserts builds.
2108 CmdArgs.push_back("-disable-llvm-verifier");
2109 // Discard LLVM value names in -asserts builds.
2110 CmdArgs.push_back("-discard-value-names");
2113 // Set the main file name, so that debug info works even with
2115 CmdArgs.push_back("-main-file-name");
2116 CmdArgs.push_back(getBaseInputName(Args, Input));
2118 // Some flags which affect the language (via preprocessor
2120 if (Args.hasArg(options::OPT_static))
2121 CmdArgs.push_back("-static-define");
2123 if (isa<AnalyzeJobAction>(JA)) {
2124 // Enable region store model by default.
2125 CmdArgs.push_back("-analyzer-store=region");
2127 // Treat blocks as analysis entry points.
2128 CmdArgs.push_back("-analyzer-opt-analyze-nested-blocks");
2130 CmdArgs.push_back("-analyzer-eagerly-assume");
2132 // Add default argument set.
2133 if (!Args.hasArg(options::OPT__analyzer_no_default_checks)) {
2134 CmdArgs.push_back("-analyzer-checker=core");
2135 CmdArgs.push_back("-analyzer-checker=apiModeling");
2137 if (!IsWindowsMSVC) {
2138 CmdArgs.push_back("-analyzer-checker=unix");
2140 // Enable "unix" checkers that also work on Windows.
2141 CmdArgs.push_back("-analyzer-checker=unix.API");
2142 CmdArgs.push_back("-analyzer-checker=unix.Malloc");
2143 CmdArgs.push_back("-analyzer-checker=unix.MallocSizeof");
2144 CmdArgs.push_back("-analyzer-checker=unix.MismatchedDeallocator");
2145 CmdArgs.push_back("-analyzer-checker=unix.cstring.BadSizeArg");
2146 CmdArgs.push_back("-analyzer-checker=unix.cstring.NullArg");
2149 // Disable some unix checkers for PS4.
2151 CmdArgs.push_back("-analyzer-disable-checker=unix.API");
2152 CmdArgs.push_back("-analyzer-disable-checker=unix.Vfork");
2155 if (getToolChain().getTriple().getVendor() == llvm::Triple::Apple)
2156 CmdArgs.push_back("-analyzer-checker=osx");
2158 CmdArgs.push_back("-analyzer-checker=deadcode");
2160 if (types::isCXX(Input.getType()))
2161 CmdArgs.push_back("-analyzer-checker=cplusplus");
2165 "-analyzer-checker=security.insecureAPI.UncheckedReturn");
2166 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.getpw");
2167 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.gets");
2168 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mktemp");
2169 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.mkstemp");
2170 CmdArgs.push_back("-analyzer-checker=security.insecureAPI.vfork");
2173 // Default nullability checks.
2174 CmdArgs.push_back("-analyzer-checker=nullability.NullPassedToNonnull");
2176 "-analyzer-checker=nullability.NullReturnedFromNonnull");
2179 // Set the output format. The default is plist, for (lame) historical
2181 CmdArgs.push_back("-analyzer-output");
2182 if (Arg *A = Args.getLastArg(options::OPT__analyzer_output))
2183 CmdArgs.push_back(A->getValue());
2185 CmdArgs.push_back("plist");
2187 // Disable the presentation of standard compiler warnings when
2188 // using --analyze. We only want to show static analyzer diagnostics
2189 // or frontend errors.
2190 CmdArgs.push_back("-w");
2192 // Add -Xanalyzer arguments when running as analyzer.
2193 Args.AddAllArgValues(CmdArgs, options::OPT_Xanalyzer);
2196 CheckCodeGenerationOptions(D, Args);
2198 llvm::Reloc::Model RelocationModel;
2201 std::tie(RelocationModel, PICLevel, IsPIE) =
2202 ParsePICArgs(getToolChain(), Args);
2204 const char *RMName = RelocationModelName(RelocationModel);
2206 if ((RelocationModel == llvm::Reloc::ROPI ||
2207 RelocationModel == llvm::Reloc::ROPI_RWPI) &&
2208 types::isCXX(Input.getType()) &&
2209 !Args.hasArg(options::OPT_fallow_unsupported))
2210 D.Diag(diag::err_drv_ropi_incompatible_with_cxx);
2213 CmdArgs.push_back("-mrelocation-model");
2214 CmdArgs.push_back(RMName);
2217 CmdArgs.push_back("-pic-level");
2218 CmdArgs.push_back(PICLevel == 1 ? "1" : "2");
2220 CmdArgs.push_back("-pic-is-pie");
2223 if (Arg *A = Args.getLastArg(options::OPT_meabi)) {
2224 CmdArgs.push_back("-meabi");
2225 CmdArgs.push_back(A->getValue());
2228 CmdArgs.push_back("-mthread-model");
2229 if (Arg *A = Args.getLastArg(options::OPT_mthread_model))
2230 CmdArgs.push_back(A->getValue());
2232 CmdArgs.push_back(Args.MakeArgString(getToolChain().getThreadModel()));
2234 Args.AddLastArg(CmdArgs, options::OPT_fveclib);
2236 if (!Args.hasFlag(options::OPT_fmerge_all_constants,
2237 options::OPT_fno_merge_all_constants))
2238 CmdArgs.push_back("-fno-merge-all-constants");
2240 // LLVM Code Generator Options.
2242 if (Args.hasArg(options::OPT_frewrite_map_file) ||
2243 Args.hasArg(options::OPT_frewrite_map_file_EQ)) {
2244 for (const Arg *A : Args.filtered(options::OPT_frewrite_map_file,
2245 options::OPT_frewrite_map_file_EQ)) {
2246 StringRef Map = A->getValue();
2247 if (!llvm::sys::fs::exists(Map)) {
2248 D.Diag(diag::err_drv_no_such_file) << Map;
2250 CmdArgs.push_back("-frewrite-map-file");
2251 CmdArgs.push_back(A->getValue());
2257 if (Arg *A = Args.getLastArg(options::OPT_Wframe_larger_than_EQ)) {
2258 StringRef v = A->getValue();
2259 CmdArgs.push_back("-mllvm");
2260 CmdArgs.push_back(Args.MakeArgString("-warn-stack-size=" + v));
2264 if (!Args.hasFlag(options::OPT_fjump_tables, options::OPT_fno_jump_tables,
2266 CmdArgs.push_back("-fno-jump-tables");
2268 if (!Args.hasFlag(options::OPT_fpreserve_as_comments,
2269 options::OPT_fno_preserve_as_comments, true))
2270 CmdArgs.push_back("-fno-preserve-as-comments");
2272 if (Arg *A = Args.getLastArg(options::OPT_mregparm_EQ)) {
2273 CmdArgs.push_back("-mregparm");
2274 CmdArgs.push_back(A->getValue());
2277 if (Arg *A = Args.getLastArg(options::OPT_fpcc_struct_return,
2278 options::OPT_freg_struct_return)) {
2279 if (getToolChain().getArch() != llvm::Triple::x86) {
2280 D.Diag(diag::err_drv_unsupported_opt_for_target)
2281 << A->getSpelling() << getToolChain().getTriple().str();
2282 } else if (A->getOption().matches(options::OPT_fpcc_struct_return)) {
2283 CmdArgs.push_back("-fpcc-struct-return");
2285 assert(A->getOption().matches(options::OPT_freg_struct_return));
2286 CmdArgs.push_back("-freg-struct-return");
2290 if (Args.hasFlag(options::OPT_mrtd, options::OPT_mno_rtd, false))
2291 CmdArgs.push_back("-fdefault-calling-conv=stdcall");
2293 if (shouldUseFramePointer(Args, getToolChain().getTriple()))
2294 CmdArgs.push_back("-mdisable-fp-elim");
2295 if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss,
2296 options::OPT_fno_zero_initialized_in_bss))
2297 CmdArgs.push_back("-mno-zero-initialized-in-bss");
2299 bool OFastEnabled = isOptimizationLevelFast(Args);
2300 // If -Ofast is the optimization level, then -fstrict-aliasing should be
2301 // enabled. This alias option is being used to simplify the hasFlag logic.
2302 OptSpecifier StrictAliasingAliasOption =
2303 OFastEnabled ? options::OPT_Ofast : options::OPT_fstrict_aliasing;
2304 // We turn strict aliasing off by default if we're in CL mode, since MSVC
2305 // doesn't do any TBAA.
2306 bool TBAAOnByDefault = !getToolChain().getDriver().IsCLMode();
2307 if (!Args.hasFlag(options::OPT_fstrict_aliasing, StrictAliasingAliasOption,
2308 options::OPT_fno_strict_aliasing, TBAAOnByDefault))
2309 CmdArgs.push_back("-relaxed-aliasing");
2310 if (!Args.hasFlag(options::OPT_fstruct_path_tbaa,
2311 options::OPT_fno_struct_path_tbaa))
2312 CmdArgs.push_back("-no-struct-path-tbaa");
2313 if (Args.hasFlag(options::OPT_fstrict_enums, options::OPT_fno_strict_enums,
2315 CmdArgs.push_back("-fstrict-enums");
2316 if (!Args.hasFlag(options::OPT_fstrict_return, options::OPT_fno_strict_return,
2318 CmdArgs.push_back("-fno-strict-return");
2319 if (Args.hasFlag(options::OPT_fallow_editor_placeholders,
2320 options::OPT_fno_allow_editor_placeholders, false))
2321 CmdArgs.push_back("-fallow-editor-placeholders");
2322 if (Args.hasFlag(options::OPT_fstrict_vtable_pointers,
2323 options::OPT_fno_strict_vtable_pointers,
2325 CmdArgs.push_back("-fstrict-vtable-pointers");
2326 if (!Args.hasFlag(options::OPT_foptimize_sibling_calls,
2327 options::OPT_fno_optimize_sibling_calls))
2328 CmdArgs.push_back("-mdisable-tail-calls");
2330 // Handle segmented stacks.
2331 if (Args.hasArg(options::OPT_fsplit_stack))
2332 CmdArgs.push_back("-split-stacks");
2334 // Handle various floating point optimization flags, mapping them to the
2335 // appropriate LLVM code generation flags. This is complicated by several
2336 // "umbrella" flags, so we do this by stepping through the flags incrementally
2337 // adjusting what we think is enabled/disabled, then at the end settting the
2338 // LLVM flags based on the final state.
2339 bool HonorInfs = true;
2340 bool HonorNans = true;
2341 // -fmath-errno is the default on some platforms, e.g. BSD-derived OSes.
2342 bool MathErrno = getToolChain().IsMathErrnoDefault();
2343 bool AssociativeMath = false;
2344 bool ReciprocalMath = false;
2345 bool SignedZeros = true;
2346 bool TrappingMath = true;
2347 StringRef DenormalFpMath = "";
2348 StringRef FpContract = "";
2350 for (Arg *A : Args) {
2351 switch (A->getOption().getID()) {
2352 // If this isn't an FP option skip the claim below
2356 // Options controlling individual features
2357 case options::OPT_fhonor_infinities: HonorInfs = true; break;
2358 case options::OPT_fno_honor_infinities: HonorInfs = false; break;
2359 case options::OPT_fhonor_nans: HonorNans = true; break;
2360 case options::OPT_fno_honor_nans: HonorNans = false; break;
2361 case options::OPT_fmath_errno: MathErrno = true; break;
2362 case options::OPT_fno_math_errno: MathErrno = false; break;
2363 case options::OPT_fassociative_math: AssociativeMath = true; break;
2364 case options::OPT_fno_associative_math: AssociativeMath = false; break;
2365 case options::OPT_freciprocal_math: ReciprocalMath = true; break;
2366 case options::OPT_fno_reciprocal_math: ReciprocalMath = false; break;
2367 case options::OPT_fsigned_zeros: SignedZeros = true; break;
2368 case options::OPT_fno_signed_zeros: SignedZeros = false; break;
2369 case options::OPT_ftrapping_math: TrappingMath = true; break;
2370 case options::OPT_fno_trapping_math: TrappingMath = false; break;
2372 case options::OPT_fdenormal_fp_math_EQ:
2373 DenormalFpMath = A->getValue();
2376 // Validate and pass through -fp-contract option.
2377 case options::OPT_ffp_contract: {
2378 StringRef Val = A->getValue();
2379 if (Val == "fast" || Val == "on" || Val == "off") {
2382 D.Diag(diag::err_drv_unsupported_option_argument)
2383 << A->getOption().getName() << Val;
2388 case options::OPT_ffinite_math_only:
2392 case options::OPT_fno_finite_math_only:
2397 case options::OPT_funsafe_math_optimizations:
2398 AssociativeMath = true;
2399 ReciprocalMath = true;
2400 SignedZeros = false;
2401 TrappingMath = false;
2403 case options::OPT_fno_unsafe_math_optimizations:
2404 AssociativeMath = false;
2405 ReciprocalMath = false;
2407 TrappingMath = true;
2408 // -fno_unsafe_math_optimizations restores default denormal handling
2409 DenormalFpMath = "";
2412 case options::OPT_Ofast:
2413 // If -Ofast is the optimization level, then -ffast-math should be enabled
2417 case options::OPT_ffast_math:
2421 AssociativeMath = true;
2422 ReciprocalMath = true;
2423 SignedZeros = false;
2424 TrappingMath = false;
2425 // If fast-math is set then set the fp-contract mode to fast.
2426 FpContract = "fast";
2428 case options::OPT_fno_fast_math:
2431 // Turning on -ffast-math (with either flag) removes the need for
2432 // MathErrno. However, turning *off* -ffast-math merely restores the
2433 // toolchain default (which may be false).
2434 MathErrno = getToolChain().IsMathErrnoDefault();
2435 AssociativeMath = false;
2436 ReciprocalMath = false;
2438 TrappingMath = true;
2439 // -fno_fast_math restores default denormal and fpcontract handling
2440 DenormalFpMath = "";
2444 // If we handled this option claim it
2449 CmdArgs.push_back("-menable-no-infs");
2452 CmdArgs.push_back("-menable-no-nans");
2455 CmdArgs.push_back("-fmath-errno");
2457 if (!MathErrno && AssociativeMath && ReciprocalMath && !SignedZeros &&
2459 CmdArgs.push_back("-menable-unsafe-fp-math");
2462 CmdArgs.push_back("-fno-signed-zeros");
2465 CmdArgs.push_back("-freciprocal-math");
2468 CmdArgs.push_back("-fno-trapping-math");
2470 if (!DenormalFpMath.empty())
2471 CmdArgs.push_back(Args.MakeArgString("-fdenormal-fp-math="+DenormalFpMath));
2473 if (!FpContract.empty())
2474 CmdArgs.push_back(Args.MakeArgString("-ffp-contract="+FpContract));
2476 ParseMRecip(getToolChain().getDriver(), Args, CmdArgs);
2478 // -ffast-math enables the __FAST_MATH__ preprocessor macro, but check for the
2479 // individual features enabled by -ffast-math instead of the option itself as
2480 // that's consistent with gcc's behaviour.
2481 if (!HonorInfs && !HonorNans && !MathErrno && AssociativeMath &&
2482 ReciprocalMath && !SignedZeros && !TrappingMath)
2483 CmdArgs.push_back("-ffast-math");
2485 // Handle __FINITE_MATH_ONLY__ similarly.
2486 if (!HonorInfs && !HonorNans)
2487 CmdArgs.push_back("-ffinite-math-only");
2489 // Decide whether to use verbose asm. Verbose assembly is the default on
2490 // toolchains which have the integrated assembler on by default.
2491 bool IsIntegratedAssemblerDefault =
2492 getToolChain().IsIntegratedAssemblerDefault();
2493 if (Args.hasFlag(options::OPT_fverbose_asm, options::OPT_fno_verbose_asm,
2494 IsIntegratedAssemblerDefault) ||
2495 Args.hasArg(options::OPT_dA))
2496 CmdArgs.push_back("-masm-verbose");
2498 if (!Args.hasFlag(options::OPT_fintegrated_as, options::OPT_fno_integrated_as,
2499 IsIntegratedAssemblerDefault))
2500 CmdArgs.push_back("-no-integrated-as");
2502 if (Args.hasArg(options::OPT_fdebug_pass_structure)) {
2503 CmdArgs.push_back("-mdebug-pass");
2504 CmdArgs.push_back("Structure");
2506 if (Args.hasArg(options::OPT_fdebug_pass_arguments)) {
2507 CmdArgs.push_back("-mdebug-pass");
2508 CmdArgs.push_back("Arguments");
2511 // Enable -mconstructor-aliases except on darwin, where we have to work around
2512 // a linker bug (see <rdar://problem/7651567>), and CUDA device code, where
2513 // aliases aren't supported.
2514 if (!getToolChain().getTriple().isOSDarwin() &&
2515 !getToolChain().getTriple().isNVPTX())
2516 CmdArgs.push_back("-mconstructor-aliases");
2518 // Darwin's kernel doesn't support guard variables; just die if we
2520 if (KernelOrKext && getToolChain().getTriple().isOSDarwin())
2521 CmdArgs.push_back("-fforbid-guard-variables");
2523 if (Args.hasFlag(options::OPT_mms_bitfields, options::OPT_mno_ms_bitfields,
2525 CmdArgs.push_back("-mms-bitfields");
2528 if (Args.hasFlag(options::OPT_mpie_copy_relocations,
2529 options::OPT_mno_pie_copy_relocations,
2531 CmdArgs.push_back("-mpie-copy-relocations");
2534 // This is a coarse approximation of what llvm-gcc actually does, both
2535 // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more
2536 // complicated ways.
2537 bool AsynchronousUnwindTables =
2538 Args.hasFlag(options::OPT_fasynchronous_unwind_tables,
2539 options::OPT_fno_asynchronous_unwind_tables,
2540 (getToolChain().IsUnwindTablesDefault() ||
2541 getToolChain().getSanitizerArgs().needsUnwindTables()) &&
2543 if (Args.hasFlag(options::OPT_funwind_tables, options::OPT_fno_unwind_tables,
2544 AsynchronousUnwindTables))
2545 CmdArgs.push_back("-munwind-tables");
2547 getToolChain().addClangTargetOptions(Args, CmdArgs);
2549 if (Arg *A = Args.getLastArg(options::OPT_flimited_precision_EQ)) {
2550 CmdArgs.push_back("-mlimit-float-precision");
2551 CmdArgs.push_back(A->getValue());
2554 // FIXME: Handle -mtune=.
2555 (void)Args.hasArg(options::OPT_mtune_EQ);
2557 if (Arg *A = Args.getLastArg(options::OPT_mcmodel_EQ)) {
2558 CmdArgs.push_back("-mcode-model");
2559 CmdArgs.push_back(A->getValue());
2562 // Add the target cpu
2563 std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
2565 CmdArgs.push_back("-target-cpu");
2566 CmdArgs.push_back(Args.MakeArgString(CPU));
2569 if (const Arg *A = Args.getLastArg(options::OPT_mfpmath_EQ)) {
2570 CmdArgs.push_back("-mfpmath");
2571 CmdArgs.push_back(A->getValue());
2574 // Add the target features
2575 getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, false);
2577 // Add target specific flags.
2578 switch (getToolChain().getArch()) {
2582 case llvm::Triple::arm:
2583 case llvm::Triple::armeb:
2584 case llvm::Triple::thumb:
2585 case llvm::Triple::thumbeb:
2586 // Use the effective triple, which takes into account the deployment target.
2587 AddARMTargetArgs(Triple, Args, CmdArgs, KernelOrKext);
2590 case llvm::Triple::aarch64:
2591 case llvm::Triple::aarch64_be:
2592 AddAArch64TargetArgs(Args, CmdArgs);
2595 case llvm::Triple::mips:
2596 case llvm::Triple::mipsel:
2597 case llvm::Triple::mips64:
2598 case llvm::Triple::mips64el:
2599 AddMIPSTargetArgs(Args, CmdArgs);
2602 case llvm::Triple::ppc:
2603 case llvm::Triple::ppc64:
2604 case llvm::Triple::ppc64le:
2605 AddPPCTargetArgs(Args, CmdArgs);
2608 case llvm::Triple::sparc:
2609 case llvm::Triple::sparcel:
2610 case llvm::Triple::sparcv9:
2611 AddSparcTargetArgs(Args, CmdArgs);
2614 case llvm::Triple::systemz:
2615 AddSystemZTargetArgs(Args, CmdArgs);
2618 case llvm::Triple::x86:
2619 case llvm::Triple::x86_64:
2620 AddX86TargetArgs(Args, CmdArgs);
2623 case llvm::Triple::lanai:
2624 AddLanaiTargetArgs(Args, CmdArgs);
2627 case llvm::Triple::hexagon:
2628 AddHexagonTargetArgs(Args, CmdArgs);
2631 case llvm::Triple::wasm32:
2632 case llvm::Triple::wasm64:
2633 AddWebAssemblyTargetArgs(Args, CmdArgs);
2637 // The 'g' groups options involve a somewhat intricate sequence of decisions
2638 // about what to pass from the driver to the frontend, but by the time they
2639 // reach cc1 they've been factored into three well-defined orthogonal choices:
2640 // * what level of debug info to generate
2641 // * what dwarf version to write
2642 // * what debugger tuning to use
2643 // This avoids having to monkey around further in cc1 other than to disable
2644 // codeview if not running in a Windows environment. Perhaps even that
2645 // decision should be made in the driver as well though.
2646 unsigned DwarfVersion = 0;
2647 llvm::DebuggerKind DebuggerTuning = getToolChain().getDefaultDebuggerTuning();
2648 // These two are potentially updated by AddClangCLArgs.
2649 codegenoptions::DebugInfoKind DebugInfoKind = codegenoptions::NoDebugInfo;
2650 bool EmitCodeView = false;
2652 // Add clang-cl arguments.
2653 types::ID InputType = Input.getType();
2654 if (getToolChain().getDriver().IsCLMode())
2655 AddClangCLArgs(Args, InputType, CmdArgs, &DebugInfoKind, &EmitCodeView);
2657 // Pass the linker version in use.
2658 if (Arg *A = Args.getLastArg(options::OPT_mlinker_version_EQ)) {
2659 CmdArgs.push_back("-target-linker-version");
2660 CmdArgs.push_back(A->getValue());
2663 if (!shouldUseLeafFramePointer(Args, getToolChain().getTriple()))
2664 CmdArgs.push_back("-momit-leaf-frame-pointer");
2666 // Explicitly error on some things we know we don't support and can't just
2668 if (!Args.hasArg(options::OPT_fallow_unsupported)) {
2670 if (types::isCXX(InputType) && getToolChain().getTriple().isOSDarwin() &&
2671 getToolChain().getArch() == llvm::Triple::x86) {
2672 if ((Unsupported = Args.getLastArg(options::OPT_fapple_kext)) ||
2673 (Unsupported = Args.getLastArg(options::OPT_mkernel)))
2674 D.Diag(diag::err_drv_clang_unsupported_opt_cxx_darwin_i386)
2675 << Unsupported->getOption().getName();
2677 // The faltivec option has been superseded by the maltivec option.
2678 if ((Unsupported = Args.getLastArg(options::OPT_faltivec)))
2679 D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
2680 << Unsupported->getOption().getName()
2681 << "please use -maltivec and include altivec.h explicitly";
2682 if ((Unsupported = Args.getLastArg(options::OPT_fno_altivec)))
2683 D.Diag(diag::err_drv_clang_unsupported_opt_faltivec)
2684 << Unsupported->getOption().getName() << "please use -mno-altivec";
2687 Args.AddAllArgs(CmdArgs, options::OPT_v);
2688 Args.AddLastArg(CmdArgs, options::OPT_H);
2689 if (D.CCPrintHeaders && !D.CCGenDiagnostics) {
2690 CmdArgs.push_back("-header-include-file");
2691 CmdArgs.push_back(D.CCPrintHeadersFilename ? D.CCPrintHeadersFilename
2694 Args.AddLastArg(CmdArgs, options::OPT_P);
2695 Args.AddLastArg(CmdArgs, options::OPT_print_ivar_layout);
2697 if (D.CCLogDiagnostics && !D.CCGenDiagnostics) {
2698 CmdArgs.push_back("-diagnostic-log-file");
2699 CmdArgs.push_back(D.CCLogDiagnosticsFilename ? D.CCLogDiagnosticsFilename
2703 bool splitDwarfInlining =
2704 Args.hasFlag(options::OPT_fsplit_dwarf_inlining,
2705 options::OPT_fno_split_dwarf_inlining, true);
2707 Args.ClaimAllArgs(options::OPT_g_Group);
2708 Arg *SplitDwarfArg = Args.getLastArg(options::OPT_gsplit_dwarf);
2709 if (Arg *A = Args.getLastArg(options::OPT_g_Group)) {
2710 // If the last option explicitly specified a debug-info level, use it.
2711 if (A->getOption().matches(options::OPT_gN_Group)) {
2712 DebugInfoKind = DebugLevelToInfoKind(*A);
2713 // If you say "-gsplit-dwarf -gline-tables-only", -gsplit-dwarf loses.
2714 // But -gsplit-dwarf is not a g_group option, hence we have to check the
2715 // order explicitly. (If -gsplit-dwarf wins, we fix DebugInfoKind later.)
2716 // This gets a bit more complicated if you've disabled inline info in the
2717 // skeleton CUs (splitDwarfInlining) - then there's value in composing
2718 // split-dwarf and line-tables-only, so let those compose naturally in
2720 // And if you just turned off debug info, (-gsplit-dwarf -g0) - do that.
2721 if (SplitDwarfArg) {
2722 if (A->getIndex() > SplitDwarfArg->getIndex()) {
2723 if (DebugInfoKind == codegenoptions::NoDebugInfo ||
2724 (DebugInfoKind == codegenoptions::DebugLineTablesOnly &&
2725 splitDwarfInlining))
2726 SplitDwarfArg = nullptr;
2727 } else if (splitDwarfInlining)
2728 DebugInfoKind = codegenoptions::NoDebugInfo;
2731 // For any other 'g' option, use Limited.
2732 DebugInfoKind = codegenoptions::LimitedDebugInfo;
2735 // If a debugger tuning argument appeared, remember it.
2736 if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
2737 options::OPT_ggdbN_Group)) {
2738 if (A->getOption().matches(options::OPT_glldb))
2739 DebuggerTuning = llvm::DebuggerKind::LLDB;
2740 else if (A->getOption().matches(options::OPT_gsce))
2741 DebuggerTuning = llvm::DebuggerKind::SCE;
2743 DebuggerTuning = llvm::DebuggerKind::GDB;
2746 // If a -gdwarf argument appeared, remember it.
2747 if (Arg *A = Args.getLastArg(options::OPT_gdwarf_2, options::OPT_gdwarf_3,
2748 options::OPT_gdwarf_4, options::OPT_gdwarf_5))
2749 DwarfVersion = DwarfVersionNum(A->getSpelling());
2751 // Forward -gcodeview. EmitCodeView might have been set by CL-compatibility
2752 // argument parsing.
2753 if (Args.hasArg(options::OPT_gcodeview) || EmitCodeView) {
2754 // DwarfVersion remains at 0 if no explicit choice was made.
2755 CmdArgs.push_back("-gcodeview");
2756 } else if (DwarfVersion == 0 &&
2757 DebugInfoKind != codegenoptions::NoDebugInfo) {
2758 DwarfVersion = getToolChain().GetDefaultDwarfVersion();
2761 // We ignore flag -gstrict-dwarf for now.
2762 // And we handle flag -grecord-gcc-switches later with DwarfDebugFlags.
2763 Args.ClaimAllArgs(options::OPT_g_flags_Group);
2765 // Column info is included by default for everything except PS4 and CodeView.
2766 // Clang doesn't track end columns, just starting columns, which, in theory,
2767 // is fine for CodeView (and PDB). In practice, however, the Microsoft
2768 // debuggers don't handle missing end columns well, so it's better not to
2769 // include any column info.
2770 if (Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info,
2771 /*Default=*/ !IsPS4CPU && !(IsWindowsMSVC && EmitCodeView)))
2772 CmdArgs.push_back("-dwarf-column-info");
2774 // FIXME: Move backend command line options to the module.
2775 // If -gline-tables-only is the last option it wins.
2776 if (DebugInfoKind != codegenoptions::DebugLineTablesOnly &&
2777 Args.hasArg(options::OPT_gmodules)) {
2778 DebugInfoKind = codegenoptions::LimitedDebugInfo;
2779 CmdArgs.push_back("-dwarf-ext-refs");
2780 CmdArgs.push_back("-fmodule-format=obj");
2783 // -gsplit-dwarf should turn on -g and enable the backend dwarf
2784 // splitting and extraction.
2785 // FIXME: Currently only works on Linux.
2786 if (getToolChain().getTriple().isOSLinux()) {
2787 if (!splitDwarfInlining)
2788 CmdArgs.push_back("-fno-split-dwarf-inlining");
2789 if (SplitDwarfArg) {
2790 if (DebugInfoKind == codegenoptions::NoDebugInfo)
2791 DebugInfoKind = codegenoptions::LimitedDebugInfo;
2792 CmdArgs.push_back("-enable-split-dwarf");
2796 // After we've dealt with all combinations of things that could
2797 // make DebugInfoKind be other than None or DebugLineTablesOnly,
2798 // figure out if we need to "upgrade" it to standalone debug info.
2799 // We parse these two '-f' options whether or not they will be used,
2800 // to claim them even if you wrote "-fstandalone-debug -gline-tables-only"
2801 bool NeedFullDebug = Args.hasFlag(options::OPT_fstandalone_debug,
2802 options::OPT_fno_standalone_debug,
2803 getToolChain().GetDefaultStandaloneDebug());
2804 if (DebugInfoKind == codegenoptions::LimitedDebugInfo && NeedFullDebug)
2805 DebugInfoKind = codegenoptions::FullDebugInfo;
2806 RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion,
2809 // -fdebug-macro turns on macro debug info generation.
2810 if (Args.hasFlag(options::OPT_fdebug_macro, options::OPT_fno_debug_macro,
2812 CmdArgs.push_back("-debug-info-macro");
2814 // -ggnu-pubnames turns on gnu style pubnames in the backend.
2815 if (Args.hasArg(options::OPT_ggnu_pubnames)) {
2816 CmdArgs.push_back("-backend-option");
2817 CmdArgs.push_back("-generate-gnu-dwarf-pub-sections");
2820 // -gdwarf-aranges turns on the emission of the aranges section in the
2822 // Always enabled on the PS4.
2823 if (Args.hasArg(options::OPT_gdwarf_aranges) || IsPS4CPU) {
2824 CmdArgs.push_back("-backend-option");
2825 CmdArgs.push_back("-generate-arange-section");
2828 if (Args.hasFlag(options::OPT_fdebug_types_section,
2829 options::OPT_fno_debug_types_section, false)) {
2830 CmdArgs.push_back("-backend-option");
2831 CmdArgs.push_back("-generate-type-units");
2834 RenderDebugInfoCompressionArgs(Args, CmdArgs, D);
2836 bool UseSeparateSections = isUseSeparateSections(Triple);
2838 if (Args.hasFlag(options::OPT_ffunction_sections,
2839 options::OPT_fno_function_sections, UseSeparateSections)) {
2840 CmdArgs.push_back("-ffunction-sections");
2843 if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
2844 UseSeparateSections)) {
2845 CmdArgs.push_back("-fdata-sections");
2848 if (!Args.hasFlag(options::OPT_funique_section_names,
2849 options::OPT_fno_unique_section_names, true))
2850 CmdArgs.push_back("-fno-unique-section-names");
2852 Args.AddAllArgs(CmdArgs, options::OPT_finstrument_functions);
2854 addPGOAndCoverageFlags(C, D, Output, Args, CmdArgs);
2856 // Add runtime flag for PS4 when PGO or Coverage are enabled.
2857 if (getToolChain().getTriple().isPS4CPU())
2858 PS4cpu::addProfileRTArgs(getToolChain(), Args, CmdArgs);
2860 // Pass options for controlling the default header search paths.
2861 if (Args.hasArg(options::OPT_nostdinc)) {
2862 CmdArgs.push_back("-nostdsysteminc");
2863 CmdArgs.push_back("-nobuiltininc");
2865 if (Args.hasArg(options::OPT_nostdlibinc))
2866 CmdArgs.push_back("-nostdsysteminc");
2867 Args.AddLastArg(CmdArgs, options::OPT_nostdincxx);
2868 Args.AddLastArg(CmdArgs, options::OPT_nobuiltininc);
2871 // Pass the path to compiler resource files.
2872 CmdArgs.push_back("-resource-dir");
2873 CmdArgs.push_back(D.ResourceDir.c_str());
2875 Args.AddLastArg(CmdArgs, options::OPT_working_directory);
2877 bool ARCMTEnabled = false;
2878 if (!Args.hasArg(options::OPT_fno_objc_arc, options::OPT_fobjc_arc)) {
2879 if (const Arg *A = Args.getLastArg(options::OPT_ccc_arcmt_check,
2880 options::OPT_ccc_arcmt_modify,
2881 options::OPT_ccc_arcmt_migrate)) {
2882 ARCMTEnabled = true;
2883 switch (A->getOption().getID()) {
2885 llvm_unreachable("missed a case");
2886 case options::OPT_ccc_arcmt_check:
2887 CmdArgs.push_back("-arcmt-check");
2889 case options::OPT_ccc_arcmt_modify:
2890 CmdArgs.push_back("-arcmt-modify");
2892 case options::OPT_ccc_arcmt_migrate:
2893 CmdArgs.push_back("-arcmt-migrate");
2894 CmdArgs.push_back("-mt-migrate-directory");
2895 CmdArgs.push_back(A->getValue());
2897 Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_report_output);
2898 Args.AddLastArg(CmdArgs, options::OPT_arcmt_migrate_emit_arc_errors);
2903 Args.ClaimAllArgs(options::OPT_ccc_arcmt_check);
2904 Args.ClaimAllArgs(options::OPT_ccc_arcmt_modify);
2905 Args.ClaimAllArgs(options::OPT_ccc_arcmt_migrate);
2908 if (const Arg *A = Args.getLastArg(options::OPT_ccc_objcmt_migrate)) {
2910 D.Diag(diag::err_drv_argument_not_allowed_with) << A->getAsString(Args)
2911 << "-ccc-arcmt-migrate";
2913 CmdArgs.push_back("-mt-migrate-directory");
2914 CmdArgs.push_back(A->getValue());
2916 if (!Args.hasArg(options::OPT_objcmt_migrate_literals,
2917 options::OPT_objcmt_migrate_subscripting,
2918 options::OPT_objcmt_migrate_property)) {
2919 // None specified, means enable them all.
2920 CmdArgs.push_back("-objcmt-migrate-literals");
2921 CmdArgs.push_back("-objcmt-migrate-subscripting");
2922 CmdArgs.push_back("-objcmt-migrate-property");
2924 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
2925 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
2926 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
2929 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_literals);
2930 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_subscripting);
2931 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property);
2932 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_all);
2933 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readonly_property);
2934 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_readwrite_property);
2935 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_property_dot_syntax);
2936 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_annotation);
2937 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_instancetype);
2938 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_nsmacros);
2939 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_protocol_conformance);
2940 Args.AddLastArg(CmdArgs, options::OPT_objcmt_atomic_property);
2941 Args.AddLastArg(CmdArgs, options::OPT_objcmt_returns_innerpointer_property);
2942 Args.AddLastArg(CmdArgs, options::OPT_objcmt_ns_nonatomic_iosonly);
2943 Args.AddLastArg(CmdArgs, options::OPT_objcmt_migrate_designated_init);
2944 Args.AddLastArg(CmdArgs, options::OPT_objcmt_whitelist_dir_path);
2947 // Add preprocessing options like -I, -D, etc. if we are using the
2950 // FIXME: Support -fpreprocessed
2951 if (types::getPreprocessedType(InputType) != types::TY_INVALID)
2952 AddPreprocessingOptions(C, JA, D, Args, CmdArgs, Output, Inputs);
2954 // Don't warn about "clang -c -DPIC -fPIC test.i" because libtool.m4 assumes
2955 // that "The compiler can only warn and ignore the option if not recognized".
2956 // When building with ccache, it will pass -D options to clang even on
2957 // preprocessed inputs and configure concludes that -fPIC is not supported.
2958 Args.ClaimAllArgs(options::OPT_D);
2960 // Manually translate -O4 to -O3; let clang reject others.
2961 if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
2962 if (A->getOption().matches(options::OPT_O4)) {
2963 CmdArgs.push_back("-O3");
2964 D.Diag(diag::warn_O4_is_O3);
2966 A->render(Args, CmdArgs);
2970 // Warn about ignored options to clang.
2972 Args.filtered(options::OPT_clang_ignored_gcc_optimization_f_Group)) {
2973 D.Diag(diag::warn_ignored_gcc_optimization) << A->getAsString(Args);
2977 claimNoWarnArgs(Args);
2979 Args.AddAllArgs(CmdArgs, options::OPT_R_Group);
2981 Args.AddAllArgs(CmdArgs, options::OPT_W_Group);
2982 if (Args.hasFlag(options::OPT_pedantic, options::OPT_no_pedantic, false))
2983 CmdArgs.push_back("-pedantic");
2984 Args.AddLastArg(CmdArgs, options::OPT_pedantic_errors);
2985 Args.AddLastArg(CmdArgs, options::OPT_w);
2987 // Handle -{std, ansi, trigraphs} -- take the last of -{std, ansi}
2988 // (-ansi is equivalent to -std=c89 or -std=c++98).
2990 // If a std is supplied, only add -trigraphs if it follows the
2992 bool ImplyVCPPCXXVer = false;
2993 if (Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi)) {
2994 if (Std->getOption().matches(options::OPT_ansi))
2995 if (types::isCXX(InputType))
2996 CmdArgs.push_back("-std=c++98");
2998 CmdArgs.push_back("-std=c89");
3000 Std->render(Args, CmdArgs);
3002 // If -f(no-)trigraphs appears after the language standard flag, honor it.
3003 if (Arg *A = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi,
3004 options::OPT_ftrigraphs,
3005 options::OPT_fno_trigraphs))
3007 A->render(Args, CmdArgs);
3009 // Honor -std-default.
3011 // FIXME: Clang doesn't correctly handle -std= when the input language
3012 // doesn't match. For the time being just ignore this for C++ inputs;
3013 // eventually we want to do all the standard defaulting here instead of
3014 // splitting it between the driver and clang -cc1.
3015 if (!types::isCXX(InputType))
3016 Args.AddAllArgsTranslated(CmdArgs, options::OPT_std_default_EQ, "-std=",
3018 else if (IsWindowsMSVC)
3019 ImplyVCPPCXXVer = true;
3021 Args.AddLastArg(CmdArgs, options::OPT_ftrigraphs,
3022 options::OPT_fno_trigraphs);
3025 // GCC's behavior for -Wwrite-strings is a bit strange:
3026 // * In C, this "warning flag" changes the types of string literals from
3027 // 'char[N]' to 'const char[N]', and thus triggers an unrelated warning
3028 // for the discarded qualifier.
3029 // * In C++, this is just a normal warning flag.
3031 // Implementing this warning correctly in C is hard, so we follow GCC's
3032 // behavior for now. FIXME: Directly diagnose uses of a string literal as
3033 // a non-const char* in C, rather than using this crude hack.
3034 if (!types::isCXX(InputType)) {
3035 // FIXME: This should behave just like a warning flag, and thus should also
3036 // respect -Weverything, -Wno-everything, -Werror=write-strings, and so on.
3038 Args.getLastArg(options::OPT_Wwrite_strings,
3039 options::OPT_Wno_write_strings, options::OPT_w);
3041 WriteStrings->getOption().matches(options::OPT_Wwrite_strings))
3042 CmdArgs.push_back("-fconst-strings");
3045 // GCC provides a macro definition '__DEPRECATED' when -Wdeprecated is active
3046 // during C++ compilation, which it is by default. GCC keeps this define even
3047 // in the presence of '-w', match this behavior bug-for-bug.
3048 if (types::isCXX(InputType) &&
3049 Args.hasFlag(options::OPT_Wdeprecated, options::OPT_Wno_deprecated,
3051 CmdArgs.push_back("-fdeprecated-macro");
3054 // Translate GCC's misnamer '-fasm' arguments to '-fgnu-keywords'.
3055 if (Arg *Asm = Args.getLastArg(options::OPT_fasm, options::OPT_fno_asm)) {
3056 if (Asm->getOption().matches(options::OPT_fasm))
3057 CmdArgs.push_back("-fgnu-keywords");
3059 CmdArgs.push_back("-fno-gnu-keywords");
3062 if (ShouldDisableDwarfDirectory(Args, getToolChain()))
3063 CmdArgs.push_back("-fno-dwarf-directory-asm");
3065 if (ShouldDisableAutolink(Args, getToolChain()))
3066 CmdArgs.push_back("-fno-autolink");
3068 // Add in -fdebug-compilation-dir if necessary.
3069 addDebugCompDirArg(Args, CmdArgs);
3071 for (const Arg *A : Args.filtered(options::OPT_fdebug_prefix_map_EQ)) {
3072 StringRef Map = A->getValue();
3073 if (Map.find('=') == StringRef::npos)
3074 D.Diag(diag::err_drv_invalid_argument_to_fdebug_prefix_map) << Map;
3076 CmdArgs.push_back(Args.MakeArgString("-fdebug-prefix-map=" + Map));
3080 if (Arg *A = Args.getLastArg(options::OPT_ftemplate_depth_,
3081 options::OPT_ftemplate_depth_EQ)) {
3082 CmdArgs.push_back("-ftemplate-depth");
3083 CmdArgs.push_back(A->getValue());
3086 if (Arg *A = Args.getLastArg(options::OPT_foperator_arrow_depth_EQ)) {
3087 CmdArgs.push_back("-foperator-arrow-depth");
3088 CmdArgs.push_back(A->getValue());
3091 if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_depth_EQ)) {
3092 CmdArgs.push_back("-fconstexpr-depth");
3093 CmdArgs.push_back(A->getValue());
3096 if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_steps_EQ)) {
3097 CmdArgs.push_back("-fconstexpr-steps");
3098 CmdArgs.push_back(A->getValue());
3101 if (Arg *A = Args.getLastArg(options::OPT_fbracket_depth_EQ)) {
3102 CmdArgs.push_back("-fbracket-depth");
3103 CmdArgs.push_back(A->getValue());
3106 if (Arg *A = Args.getLastArg(options::OPT_Wlarge_by_value_copy_EQ,
3107 options::OPT_Wlarge_by_value_copy_def)) {
3108 if (A->getNumValues()) {
3109 StringRef bytes = A->getValue();
3110 CmdArgs.push_back(Args.MakeArgString("-Wlarge-by-value-copy=" + bytes));
3112 CmdArgs.push_back("-Wlarge-by-value-copy=64"); // default value
3115 if (Args.hasArg(options::OPT_relocatable_pch))
3116 CmdArgs.push_back("-relocatable-pch");
3118 if (Arg *A = Args.getLastArg(options::OPT_fconstant_string_class_EQ)) {
3119 CmdArgs.push_back("-fconstant-string-class");
3120 CmdArgs.push_back(A->getValue());
3123 if (Arg *A = Args.getLastArg(options::OPT_ftabstop_EQ)) {
3124 CmdArgs.push_back("-ftabstop");
3125 CmdArgs.push_back(A->getValue());
3128 CmdArgs.push_back("-ferror-limit");
3129 if (Arg *A = Args.getLastArg(options::OPT_ferror_limit_EQ))
3130 CmdArgs.push_back(A->getValue());
3132 CmdArgs.push_back("19");
3134 if (Arg *A = Args.getLastArg(options::OPT_fmacro_backtrace_limit_EQ)) {
3135 CmdArgs.push_back("-fmacro-backtrace-limit");
3136 CmdArgs.push_back(A->getValue());
3139 if (Arg *A = Args.getLastArg(options::OPT_ftemplate_backtrace_limit_EQ)) {
3140 CmdArgs.push_back("-ftemplate-backtrace-limit");
3141 CmdArgs.push_back(A->getValue());
3144 if (Arg *A = Args.getLastArg(options::OPT_fconstexpr_backtrace_limit_EQ)) {
3145 CmdArgs.push_back("-fconstexpr-backtrace-limit");
3146 CmdArgs.push_back(A->getValue());
3149 if (Arg *A = Args.getLastArg(options::OPT_fspell_checking_limit_EQ)) {
3150 CmdArgs.push_back("-fspell-checking-limit");
3151 CmdArgs.push_back(A->getValue());
3154 // Pass -fmessage-length=.
3155 CmdArgs.push_back("-fmessage-length");
3156 if (Arg *A = Args.getLastArg(options::OPT_fmessage_length_EQ)) {
3157 CmdArgs.push_back(A->getValue());
3159 // If -fmessage-length=N was not specified, determine whether this is a
3160 // terminal and, if so, implicitly define -fmessage-length appropriately.
3161 unsigned N = llvm::sys::Process::StandardErrColumns();
3162 CmdArgs.push_back(Args.MakeArgString(Twine(N)));
3165 // -fvisibility= and -fvisibility-ms-compat are of a piece.
3166 if (const Arg *A = Args.getLastArg(options::OPT_fvisibility_EQ,
3167 options::OPT_fvisibility_ms_compat)) {
3168 if (A->getOption().matches(options::OPT_fvisibility_EQ)) {
3169 CmdArgs.push_back("-fvisibility");
3170 CmdArgs.push_back(A->getValue());
3172 assert(A->getOption().matches(options::OPT_fvisibility_ms_compat));
3173 CmdArgs.push_back("-fvisibility");
3174 CmdArgs.push_back("hidden");
3175 CmdArgs.push_back("-ftype-visibility");
3176 CmdArgs.push_back("default");
3180 Args.AddLastArg(CmdArgs, options::OPT_fvisibility_inlines_hidden);
3182 Args.AddLastArg(CmdArgs, options::OPT_ftlsmodel_EQ);
3184 // -fhosted is default.
3185 bool IsHosted = true;
3186 if (Args.hasFlag(options::OPT_ffreestanding, options::OPT_fhosted, false) ||
3188 CmdArgs.push_back("-ffreestanding");
3192 // Forward -f (flag) options which we can pass directly.
3193 Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
3194 Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
3195 Args.AddLastArg(CmdArgs, options::OPT_fno_operator_names);
3196 // Emulated TLS is enabled by default on Android, and can be enabled manually
3197 // with -femulated-tls.
3198 bool EmulatedTLSDefault = Triple.isAndroid() || Triple.isWindowsCygwinEnvironment();
3199 if (Args.hasFlag(options::OPT_femulated_tls, options::OPT_fno_emulated_tls,
3200 EmulatedTLSDefault))
3201 CmdArgs.push_back("-femulated-tls");
3202 // AltiVec-like language extensions aren't relevant for assembling.
3203 if (!isa<PreprocessJobAction>(JA) || Output.getType() != types::TY_PP_Asm)
3204 Args.AddLastArg(CmdArgs, options::OPT_fzvector);
3206 Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_show_template_tree);
3207 Args.AddLastArg(CmdArgs, options::OPT_fno_elide_type);
3209 // Forward flags for OpenMP. We don't do this if the current action is an
3210 // device offloading action other than OpenMP.
3211 if (Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
3212 options::OPT_fno_openmp, false) &&
3213 (JA.isDeviceOffloading(Action::OFK_None) ||
3214 JA.isDeviceOffloading(Action::OFK_OpenMP))) {
3215 switch (getToolChain().getDriver().getOpenMPRuntime(Args)) {
3216 case Driver::OMPRT_OMP:
3217 case Driver::OMPRT_IOMP5:
3218 // Clang can generate useful OpenMP code for these two runtime libraries.
3219 CmdArgs.push_back("-fopenmp");
3221 // If no option regarding the use of TLS in OpenMP codegeneration is
3222 // given, decide a default based on the target. Otherwise rely on the
3223 // options and pass the right information to the frontend.
3224 if (!Args.hasFlag(options::OPT_fopenmp_use_tls,
3225 options::OPT_fnoopenmp_use_tls, /*Default=*/true))
3226 CmdArgs.push_back("-fnoopenmp-use-tls");
3227 Args.AddAllArgs(CmdArgs, options::OPT_fopenmp_version_EQ);
3230 // By default, if Clang doesn't know how to generate useful OpenMP code
3231 // for a specific runtime library, we just don't pass the '-fopenmp' flag
3232 // down to the actual compilation.
3233 // FIXME: It would be better to have a mode which *only* omits IR
3234 // generation based on the OpenMP support so that we get consistent
3235 // semantic analysis, etc.
3240 const SanitizerArgs &Sanitize = getToolChain().getSanitizerArgs();
3241 Sanitize.addArgs(getToolChain(), Args, CmdArgs, InputType);
3243 const XRayArgs &XRay = getToolChain().getXRayArgs();
3244 XRay.addArgs(getToolChain(), Args, CmdArgs, InputType);
3246 if (getToolChain().SupportsProfiling())
3247 Args.AddLastArg(CmdArgs, options::OPT_pg);
3249 if (getToolChain().SupportsProfiling())
3250 Args.AddLastArg(CmdArgs, options::OPT_mfentry);
3252 // -flax-vector-conversions is default.
3253 if (!Args.hasFlag(options::OPT_flax_vector_conversions,
3254 options::OPT_fno_lax_vector_conversions))
3255 CmdArgs.push_back("-fno-lax-vector-conversions");
3257 if (Args.getLastArg(options::OPT_fapple_kext) ||
3258 (Args.hasArg(options::OPT_mkernel) && types::isCXX(InputType)))
3259 CmdArgs.push_back("-fapple-kext");
3261 Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch);
3262 Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_print_source_range_info);
3263 Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits);
3264 Args.AddLastArg(CmdArgs, options::OPT_ftime_report);
3265 Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
3267 if (Arg *A = Args.getLastArg(options::OPT_ftrapv_handler_EQ)) {
3268 CmdArgs.push_back("-ftrapv-handler");
3269 CmdArgs.push_back(A->getValue());
3272 Args.AddLastArg(CmdArgs, options::OPT_ftrap_function_EQ);
3274 // -fno-strict-overflow implies -fwrapv if it isn't disabled, but
3275 // -fstrict-overflow won't turn off an explicitly enabled -fwrapv.
3276 if (Arg *A = Args.getLastArg(options::OPT_fwrapv, options::OPT_fno_wrapv)) {
3277 if (A->getOption().matches(options::OPT_fwrapv))
3278 CmdArgs.push_back("-fwrapv");
3279 } else if (Arg *A = Args.getLastArg(options::OPT_fstrict_overflow,
3280 options::OPT_fno_strict_overflow)) {
3281 if (A->getOption().matches(options::OPT_fno_strict_overflow))
3282 CmdArgs.push_back("-fwrapv");
3285 if (Arg *A = Args.getLastArg(options::OPT_freroll_loops,
3286 options::OPT_fno_reroll_loops))
3287 if (A->getOption().matches(options::OPT_freroll_loops))
3288 CmdArgs.push_back("-freroll-loops");
3290 Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings);
3291 Args.AddLastArg(CmdArgs, options::OPT_funroll_loops,
3292 options::OPT_fno_unroll_loops);
3294 Args.AddLastArg(CmdArgs, options::OPT_pthread);
3296 // -stack-protector=0 is default.
3297 unsigned StackProtectorLevel = 0;
3298 // NVPTX doesn't support stack protectors; from the compiler's perspective, it
3299 // doesn't even have a stack!
3300 if (!Triple.isNVPTX()) {
3301 if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector,
3302 options::OPT_fstack_protector_all,
3303 options::OPT_fstack_protector_strong,
3304 options::OPT_fstack_protector)) {
3305 if (A->getOption().matches(options::OPT_fstack_protector)) {
3306 StackProtectorLevel = std::max<unsigned>(
3308 getToolChain().GetDefaultStackProtectorLevel(KernelOrKext));
3309 } else if (A->getOption().matches(options::OPT_fstack_protector_strong))
3310 StackProtectorLevel = LangOptions::SSPStrong;
3311 else if (A->getOption().matches(options::OPT_fstack_protector_all))
3312 StackProtectorLevel = LangOptions::SSPReq;
3314 StackProtectorLevel =
3315 getToolChain().GetDefaultStackProtectorLevel(KernelOrKext);
3316 // Only use a default stack protector on Darwin in case -ffreestanding
3317 // is not specified.
3318 if (Triple.isOSDarwin() && !IsHosted)
3319 StackProtectorLevel = 0;
3322 if (StackProtectorLevel) {
3323 CmdArgs.push_back("-stack-protector");
3324 CmdArgs.push_back(Args.MakeArgString(Twine(StackProtectorLevel)));
3327 // --param ssp-buffer-size=
3328 for (const Arg *A : Args.filtered(options::OPT__param)) {
3329 StringRef Str(A->getValue());
3330 if (Str.startswith("ssp-buffer-size=")) {
3331 if (StackProtectorLevel) {
3332 CmdArgs.push_back("-stack-protector-buffer-size");
3333 // FIXME: Verify the argument is a valid integer.
3334 CmdArgs.push_back(Args.MakeArgString(Str.drop_front(16)));
3340 // Translate -mstackrealign
3341 if (Args.hasFlag(options::OPT_mstackrealign, options::OPT_mno_stackrealign,
3343 CmdArgs.push_back(Args.MakeArgString("-mstackrealign"));
3345 if (Args.hasArg(options::OPT_mstack_alignment)) {
3346 StringRef alignment = Args.getLastArgValue(options::OPT_mstack_alignment);
3347 CmdArgs.push_back(Args.MakeArgString("-mstack-alignment=" + alignment));
3350 if (Args.hasArg(options::OPT_mstack_probe_size)) {
3351 StringRef Size = Args.getLastArgValue(options::OPT_mstack_probe_size);
3354 CmdArgs.push_back(Args.MakeArgString("-mstack-probe-size=" + Size));
3356 CmdArgs.push_back("-mstack-probe-size=0");
3359 switch (getToolChain().getArch()) {
3360 case llvm::Triple::aarch64:
3361 case llvm::Triple::aarch64_be:
3362 case llvm::Triple::arm:
3363 case llvm::Triple::armeb:
3364 case llvm::Triple::thumb:
3365 case llvm::Triple::thumbeb:
3366 CmdArgs.push_back("-fallow-half-arguments-and-returns");
3373 if (Arg *A = Args.getLastArg(options::OPT_mrestrict_it,
3374 options::OPT_mno_restrict_it)) {
3375 if (A->getOption().matches(options::OPT_mrestrict_it)) {
3376 CmdArgs.push_back("-backend-option");
3377 CmdArgs.push_back("-arm-restrict-it");
3379 CmdArgs.push_back("-backend-option");
3380 CmdArgs.push_back("-arm-no-restrict-it");
3382 } else if (Triple.isOSWindows() &&
3383 (Triple.getArch() == llvm::Triple::arm ||
3384 Triple.getArch() == llvm::Triple::thumb)) {
3385 // Windows on ARM expects restricted IT blocks
3386 CmdArgs.push_back("-backend-option");
3387 CmdArgs.push_back("-arm-restrict-it");
3390 // Forward -cl options to -cc1
3391 if (Args.getLastArg(options::OPT_cl_opt_disable)) {
3392 CmdArgs.push_back("-cl-opt-disable");
3394 if (Args.getLastArg(options::OPT_cl_strict_aliasing)) {
3395 CmdArgs.push_back("-cl-strict-aliasing");
3397 if (Args.getLastArg(options::OPT_cl_single_precision_constant)) {
3398 CmdArgs.push_back("-cl-single-precision-constant");
3400 if (Args.getLastArg(options::OPT_cl_finite_math_only)) {
3401 CmdArgs.push_back("-cl-finite-math-only");
3403 if (Args.getLastArg(options::OPT_cl_kernel_arg_info)) {
3404 CmdArgs.push_back("-cl-kernel-arg-info");
3406 if (Args.getLastArg(options::OPT_cl_unsafe_math_optimizations)) {
3407 CmdArgs.push_back("-cl-unsafe-math-optimizations");
3409 if (Args.getLastArg(options::OPT_cl_fast_relaxed_math)) {
3410 CmdArgs.push_back("-cl-fast-relaxed-math");
3412 if (Args.getLastArg(options::OPT_cl_mad_enable)) {
3413 CmdArgs.push_back("-cl-mad-enable");
3415 if (Args.getLastArg(options::OPT_cl_no_signed_zeros)) {
3416 CmdArgs.push_back("-cl-no-signed-zeros");
3418 if (Arg *A = Args.getLastArg(options::OPT_cl_std_EQ)) {
3419 std::string CLStdStr = "-cl-std=";
3420 CLStdStr += A->getValue();
3421 CmdArgs.push_back(Args.MakeArgString(CLStdStr));
3423 if (Args.getLastArg(options::OPT_cl_denorms_are_zero)) {
3424 CmdArgs.push_back("-cl-denorms-are-zero");
3426 if (Args.getLastArg(options::OPT_cl_fp32_correctly_rounded_divide_sqrt)) {
3427 CmdArgs.push_back("-cl-fp32-correctly-rounded-divide-sqrt");
3430 // Forward -f options with positive and negative forms; we translate
3432 if (Arg *A = getLastProfileSampleUseArg(Args)) {
3433 StringRef fname = A->getValue();
3434 if (!llvm::sys::fs::exists(fname))
3435 D.Diag(diag::err_drv_no_such_file) << fname;
3437 A->render(Args, CmdArgs);
3440 if (Args.hasFlag(options::OPT_fdebug_info_for_profiling,
3441 options::OPT_fno_debug_info_for_profiling, false))
3442 CmdArgs.push_back("-fdebug-info-for-profiling");
3444 // -fbuiltin is default unless -mkernel is used.
3446 Args.hasFlag(options::OPT_fbuiltin, options::OPT_fno_builtin,
3447 !Args.hasArg(options::OPT_mkernel));
3449 CmdArgs.push_back("-fno-builtin");
3451 // -ffreestanding implies -fno-builtin.
3452 if (Args.hasArg(options::OPT_ffreestanding))
3453 UseBuiltins = false;
3455 // Process the -fno-builtin-* options.
3456 for (const auto &Arg : Args) {
3457 const Option &O = Arg->getOption();
3458 if (!O.matches(options::OPT_fno_builtin_))
3462 // If -fno-builtin is specified, then there's no need to pass the option to
3467 StringRef FuncName = Arg->getValue();
3468 CmdArgs.push_back(Args.MakeArgString("-fno-builtin-" + FuncName));
3471 if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
3472 options::OPT_fno_assume_sane_operator_new))
3473 CmdArgs.push_back("-fno-assume-sane-operator-new");
3475 // -fblocks=0 is default.
3476 if (Args.hasFlag(options::OPT_fblocks, options::OPT_fno_blocks,
3477 getToolChain().IsBlocksDefault()) ||
3478 (Args.hasArg(options::OPT_fgnu_runtime) &&
3479 Args.hasArg(options::OPT_fobjc_nonfragile_abi) &&
3480 !Args.hasArg(options::OPT_fno_blocks))) {
3481 CmdArgs.push_back("-fblocks");
3483 if (!Args.hasArg(options::OPT_fgnu_runtime) &&
3484 !getToolChain().hasBlocksRuntime())
3485 CmdArgs.push_back("-fblocks-runtime-optional");
3488 if (Args.hasFlag(options::OPT_fcoroutines_ts, options::OPT_fno_coroutines_ts,
3490 types::isCXX(InputType)) {
3491 CmdArgs.push_back("-fcoroutines-ts");
3494 // -fmodules enables the use of precompiled modules (off by default).
3495 // Users can pass -fno-cxx-modules to turn off modules support for
3496 // C++/Objective-C++ programs.
3497 bool HaveClangModules = false;
3498 if (Args.hasFlag(options::OPT_fmodules, options::OPT_fno_modules, false)) {
3499 bool AllowedInCXX = Args.hasFlag(options::OPT_fcxx_modules,
3500 options::OPT_fno_cxx_modules, true);
3501 if (AllowedInCXX || !types::isCXX(InputType)) {
3502 CmdArgs.push_back("-fmodules");
3503 HaveClangModules = true;
3507 bool HaveAnyModules = HaveClangModules;
3508 if (Args.hasArg(options::OPT_fmodules_ts)) {
3509 CmdArgs.push_back("-fmodules-ts");
3510 HaveAnyModules = true;
3513 // -fmodule-maps enables implicit reading of module map files. By default,
3514 // this is enabled if we are using Clang's flavor of precompiled modules.
3515 if (Args.hasFlag(options::OPT_fimplicit_module_maps,
3516 options::OPT_fno_implicit_module_maps, HaveClangModules)) {
3517 CmdArgs.push_back("-fimplicit-module-maps");
3520 // -fmodules-decluse checks that modules used are declared so (off by
3522 if (Args.hasFlag(options::OPT_fmodules_decluse,
3523 options::OPT_fno_modules_decluse, false)) {
3524 CmdArgs.push_back("-fmodules-decluse");
3527 // -fmodules-strict-decluse is like -fmodule-decluse, but also checks that
3528 // all #included headers are part of modules.
3529 if (Args.hasFlag(options::OPT_fmodules_strict_decluse,
3530 options::OPT_fno_modules_strict_decluse, false)) {
3531 CmdArgs.push_back("-fmodules-strict-decluse");
3534 // -fno-implicit-modules turns off implicitly compiling modules on demand.
3535 if (!Args.hasFlag(options::OPT_fimplicit_modules,
3536 options::OPT_fno_implicit_modules, HaveClangModules)) {
3538 CmdArgs.push_back("-fno-implicit-modules");
3539 } else if (HaveAnyModules) {
3540 // -fmodule-cache-path specifies where our implicitly-built module files
3541 // should be written.
3542 SmallString<128> Path;
3543 if (Arg *A = Args.getLastArg(options::OPT_fmodules_cache_path))
3544 Path = A->getValue();
3545 if (C.isForDiagnostics()) {
3546 // When generating crash reports, we want to emit the modules along with
3547 // the reproduction sources, so we ignore any provided module path.
3548 Path = Output.getFilename();
3549 llvm::sys::path::replace_extension(Path, ".cache");
3550 llvm::sys::path::append(Path, "modules");
3551 } else if (Path.empty()) {
3552 // No module path was provided: use the default.
3553 llvm::sys::path::system_temp_directory(/*erasedOnReboot=*/false, Path);
3554 llvm::sys::path::append(Path, "org.llvm.clang.");
3555 appendUserToPath(Path);
3556 llvm::sys::path::append(Path, "ModuleCache");
3558 const char Arg[] = "-fmodules-cache-path=";
3559 Path.insert(Path.begin(), Arg, Arg + strlen(Arg));
3560 CmdArgs.push_back(Args.MakeArgString(Path));
3563 if (HaveAnyModules) {
3564 // -fprebuilt-module-path specifies where to load the prebuilt module files.
3565 for (const Arg *A : Args.filtered(options::OPT_fprebuilt_module_path))
3566 CmdArgs.push_back(Args.MakeArgString(
3567 std::string("-fprebuilt-module-path=") + A->getValue()));
3570 // -fmodule-name specifies the module that is currently being built (or
3571 // used for header checking by -fmodule-maps).
3572 Args.AddLastArg(CmdArgs, options::OPT_fmodule_name_EQ);
3574 // -fmodule-map-file can be used to specify files containing module
3576 Args.AddAllArgs(CmdArgs, options::OPT_fmodule_map_file);
3578 // -fbuiltin-module-map can be used to load the clang
3579 // builtin headers modulemap file.
3580 if (Args.hasArg(options::OPT_fbuiltin_module_map)) {
3581 SmallString<128> BuiltinModuleMap(getToolChain().getDriver().ResourceDir);
3582 llvm::sys::path::append(BuiltinModuleMap, "include");
3583 llvm::sys::path::append(BuiltinModuleMap, "module.modulemap");
3584 if (llvm::sys::fs::exists(BuiltinModuleMap)) {
3585 CmdArgs.push_back(Args.MakeArgString("-fmodule-map-file=" +
3590 // -fmodule-file can be used to specify files containing precompiled modules.
3592 Args.AddAllArgs(CmdArgs, options::OPT_fmodule_file);
3594 Args.ClaimAllArgs(options::OPT_fmodule_file);
3596 // When building modules and generating crashdumps, we need to dump a module
3597 // dependency VFS alongside the output.
3598 if (HaveClangModules && C.isForDiagnostics()) {
3599 SmallString<128> VFSDir(Output.getFilename());
3600 llvm::sys::path::replace_extension(VFSDir, ".cache");
3601 // Add the cache directory as a temp so the crash diagnostics pick it up.
3602 C.addTempFile(Args.MakeArgString(VFSDir));
3604 llvm::sys::path::append(VFSDir, "vfs");
3605 CmdArgs.push_back("-module-dependency-dir");
3606 CmdArgs.push_back(Args.MakeArgString(VFSDir));
3609 if (HaveClangModules)
3610 Args.AddLastArg(CmdArgs, options::OPT_fmodules_user_build_path);
3612 // Pass through all -fmodules-ignore-macro arguments.
3613 Args.AddAllArgs(CmdArgs, options::OPT_fmodules_ignore_macro);
3614 Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_interval);
3615 Args.AddLastArg(CmdArgs, options::OPT_fmodules_prune_after);
3617 Args.AddLastArg(CmdArgs, options::OPT_fbuild_session_timestamp);
3619 if (Arg *A = Args.getLastArg(options::OPT_fbuild_session_file)) {
3620 if (Args.hasArg(options::OPT_fbuild_session_timestamp))
3621 D.Diag(diag::err_drv_argument_not_allowed_with)
3622 << A->getAsString(Args) << "-fbuild-session-timestamp";
3624 llvm::sys::fs::file_status Status;
3625 if (llvm::sys::fs::status(A->getValue(), Status))
3626 D.Diag(diag::err_drv_no_such_file) << A->getValue();
3628 Args.MakeArgString("-fbuild-session-timestamp=" +
3629 Twine((uint64_t)Status.getLastModificationTime()
3634 if (Args.getLastArg(options::OPT_fmodules_validate_once_per_build_session)) {
3635 if (!Args.getLastArg(options::OPT_fbuild_session_timestamp,
3636 options::OPT_fbuild_session_file))
3637 D.Diag(diag::err_drv_modules_validate_once_requires_timestamp);
3639 Args.AddLastArg(CmdArgs,
3640 options::OPT_fmodules_validate_once_per_build_session);
3643 Args.AddLastArg(CmdArgs, options::OPT_fmodules_validate_system_headers);
3644 Args.AddLastArg(CmdArgs, options::OPT_fmodules_disable_diagnostic_validation);
3646 // -faccess-control is default.
3647 if (Args.hasFlag(options::OPT_fno_access_control,
3648 options::OPT_faccess_control, false))
3649 CmdArgs.push_back("-fno-access-control");
3651 // -felide-constructors is the default.
3652 if (Args.hasFlag(options::OPT_fno_elide_constructors,
3653 options::OPT_felide_constructors, false))
3654 CmdArgs.push_back("-fno-elide-constructors");
3656 ToolChain::RTTIMode RTTIMode = getToolChain().getRTTIMode();
3658 if (KernelOrKext || (types::isCXX(InputType) &&
3659 (RTTIMode == ToolChain::RM_DisabledExplicitly ||
3660 RTTIMode == ToolChain::RM_DisabledImplicitly)))
3661 CmdArgs.push_back("-fno-rtti");
3663 // -fshort-enums=0 is default for all architectures except Hexagon.
3664 if (Args.hasFlag(options::OPT_fshort_enums, options::OPT_fno_short_enums,
3665 getToolChain().getArch() == llvm::Triple::hexagon))
3666 CmdArgs.push_back("-fshort-enums");
3668 // -fsigned-char is default.
3669 if (Arg *A = Args.getLastArg(
3670 options::OPT_fsigned_char, options::OPT_fno_signed_char,
3671 options::OPT_funsigned_char, options::OPT_fno_unsigned_char)) {
3672 if (A->getOption().matches(options::OPT_funsigned_char) ||
3673 A->getOption().matches(options::OPT_fno_signed_char)) {
3674 CmdArgs.push_back("-fno-signed-char");
3676 } else if (!isSignedCharDefault(getToolChain().getTriple())) {
3677 CmdArgs.push_back("-fno-signed-char");
3680 // -fuse-cxa-atexit is default.
3682 options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
3683 !IsWindowsCygnus && !IsWindowsGNU &&
3684 getToolChain().getTriple().getOS() != llvm::Triple::Solaris &&
3685 getToolChain().getArch() != llvm::Triple::hexagon &&
3686 getToolChain().getArch() != llvm::Triple::xcore &&
3687 ((getToolChain().getTriple().getVendor() !=
3688 llvm::Triple::MipsTechnologies) ||
3689 getToolChain().getTriple().hasEnvironment())) ||
3691 CmdArgs.push_back("-fno-use-cxa-atexit");
3693 // -fms-extensions=0 is default.
3694 if (Args.hasFlag(options::OPT_fms_extensions, options::OPT_fno_ms_extensions,
3696 CmdArgs.push_back("-fms-extensions");
3698 // -fno-use-line-directives is default.
3699 if (Args.hasFlag(options::OPT_fuse_line_directives,
3700 options::OPT_fno_use_line_directives, false))
3701 CmdArgs.push_back("-fuse-line-directives");
3703 // -fms-compatibility=0 is default.
3704 if (Args.hasFlag(options::OPT_fms_compatibility,
3705 options::OPT_fno_ms_compatibility,
3707 Args.hasFlag(options::OPT_fms_extensions,
3708 options::OPT_fno_ms_extensions, true))))
3709 CmdArgs.push_back("-fms-compatibility");
3712 getToolChain().computeMSVCVersion(&getToolChain().getDriver(), Args);
3715 Args.MakeArgString("-fms-compatibility-version=" + MSVT.getAsString()));
3717 bool IsMSVC2015Compatible = MSVT.getMajor() >= 19;
3718 if (ImplyVCPPCXXVer) {
3719 StringRef LanguageStandard;
3720 if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) {
3721 LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue())
3722 .Case("c++14", "-std=c++14")
3723 .Case("c++latest", "-std=c++1z")
3725 if (LanguageStandard.empty())
3726 D.Diag(clang::diag::warn_drv_unused_argument)
3727 << StdArg->getAsString(Args);
3730 if (LanguageStandard.empty()) {
3731 if (IsMSVC2015Compatible)
3732 LanguageStandard = "-std=c++14";
3734 LanguageStandard = "-std=c++11";
3737 CmdArgs.push_back(LanguageStandard.data());
3740 // -fno-borland-extensions is default.
3741 if (Args.hasFlag(options::OPT_fborland_extensions,
3742 options::OPT_fno_borland_extensions, false))
3743 CmdArgs.push_back("-fborland-extensions");
3745 // -fno-declspec is default, except for PS4.
3746 if (Args.hasFlag(options::OPT_fdeclspec, options::OPT_fno_declspec,
3747 getToolChain().getTriple().isPS4()))
3748 CmdArgs.push_back("-fdeclspec");
3749 else if (Args.hasArg(options::OPT_fno_declspec))
3750 CmdArgs.push_back("-fno-declspec"); // Explicitly disabling __declspec.
3752 // -fthreadsafe-static is default, except for MSVC compatibility versions less
3754 if (!Args.hasFlag(options::OPT_fthreadsafe_statics,
3755 options::OPT_fno_threadsafe_statics,
3756 !IsWindowsMSVC || IsMSVC2015Compatible))
3757 CmdArgs.push_back("-fno-threadsafe-statics");
3759 // -fno-delayed-template-parsing is default, except for Windows where MSVC STL
3761 if (Args.hasFlag(options::OPT_fdelayed_template_parsing,
3762 options::OPT_fno_delayed_template_parsing, IsWindowsMSVC))
3763 CmdArgs.push_back("-fdelayed-template-parsing");
3765 // -fgnu-keywords default varies depending on language; only pass if
3767 if (Arg *A = Args.getLastArg(options::OPT_fgnu_keywords,
3768 options::OPT_fno_gnu_keywords))
3769 A->render(Args, CmdArgs);
3771 if (Args.hasFlag(options::OPT_fgnu89_inline, options::OPT_fno_gnu89_inline,
3773 CmdArgs.push_back("-fgnu89-inline");
3775 if (Args.hasArg(options::OPT_fno_inline))
3776 CmdArgs.push_back("-fno-inline");
3778 if (Arg* InlineArg = Args.getLastArg(options::OPT_finline_functions,
3779 options::OPT_finline_hint_functions,
3780 options::OPT_fno_inline_functions))
3781 InlineArg->render(Args, CmdArgs);
3783 Args.AddLastArg(CmdArgs, options::OPT_fexperimental_new_pass_manager,
3784 options::OPT_fno_experimental_new_pass_manager);
3786 ObjCRuntime objcRuntime = AddObjCRuntimeArgs(Args, CmdArgs, rewriteKind);
3788 // -fobjc-dispatch-method is only relevant with the nonfragile-abi, and
3789 // legacy is the default. Except for deployment target of 10.5,
3790 // next runtime is always legacy dispatch and -fno-objc-legacy-dispatch
3791 // gets ignored silently.
3792 if (objcRuntime.isNonFragile()) {
3793 if (!Args.hasFlag(options::OPT_fobjc_legacy_dispatch,
3794 options::OPT_fno_objc_legacy_dispatch,
3795 objcRuntime.isLegacyDispatchDefaultForArch(
3796 getToolChain().getArch()))) {
3797 if (getToolChain().UseObjCMixedDispatch())
3798 CmdArgs.push_back("-fobjc-dispatch-method=mixed");
3800 CmdArgs.push_back("-fobjc-dispatch-method=non-legacy");
3804 // When ObjectiveC legacy runtime is in effect on MacOSX,
3805 // turn on the option to do Array/Dictionary subscripting
3807 if (getToolChain().getArch() == llvm::Triple::x86 &&
3808 getToolChain().getTriple().isMacOSX() &&
3809 !getToolChain().getTriple().isMacOSXVersionLT(10, 7) &&
3810 objcRuntime.getKind() == ObjCRuntime::FragileMacOSX &&
3811 objcRuntime.isNeXTFamily())
3812 CmdArgs.push_back("-fobjc-subscripting-legacy-runtime");
3814 // -fencode-extended-block-signature=1 is default.
3815 if (getToolChain().IsEncodeExtendedBlockSignatureDefault()) {
3816 CmdArgs.push_back("-fencode-extended-block-signature");
3819 // Allow -fno-objc-arr to trump -fobjc-arr/-fobjc-arc.
3820 // NOTE: This logic is duplicated in ToolChains.cpp.
3821 bool ARC = isObjCAutoRefCount(Args);
3823 getToolChain().CheckObjCARC();
3825 CmdArgs.push_back("-fobjc-arc");
3827 // FIXME: It seems like this entire block, and several around it should be
3828 // wrapped in isObjC, but for now we just use it here as this is where it
3829 // was being used previously.
3830 if (types::isCXX(InputType) && types::isObjC(InputType)) {
3831 if (getToolChain().GetCXXStdlibType(Args) == ToolChain::CST_Libcxx)
3832 CmdArgs.push_back("-fobjc-arc-cxxlib=libc++");
3834 CmdArgs.push_back("-fobjc-arc-cxxlib=libstdc++");
3837 // Allow the user to enable full exceptions code emission.
3838 // We define off for Objective-CC, on for Objective-C++.
3839 if (Args.hasFlag(options::OPT_fobjc_arc_exceptions,
3840 options::OPT_fno_objc_arc_exceptions,
3841 /*default*/ types::isCXX(InputType)))
3842 CmdArgs.push_back("-fobjc-arc-exceptions");
3845 // Silence warning for full exception code emission options when explicitly
3846 // set to use no ARC.
3847 if (Args.hasArg(options::OPT_fno_objc_arc)) {
3848 Args.ClaimAllArgs(options::OPT_fobjc_arc_exceptions);
3849 Args.ClaimAllArgs(options::OPT_fno_objc_arc_exceptions);
3852 // -fobjc-infer-related-result-type is the default, except in the Objective-C
3854 if (rewriteKind != RK_None)
3855 CmdArgs.push_back("-fno-objc-infer-related-result-type");
3857 // Pass down -fobjc-weak or -fno-objc-weak if present.
3858 if (types::isObjC(InputType)) {
3859 auto WeakArg = Args.getLastArg(options::OPT_fobjc_weak,
3860 options::OPT_fno_objc_weak);
3863 } else if (!objcRuntime.allowsWeak()) {
3864 if (WeakArg->getOption().matches(options::OPT_fobjc_weak))
3865 D.Diag(diag::err_objc_weak_unsupported);
3867 WeakArg->render(Args, CmdArgs);
3871 if (Args.hasFlag(options::OPT_fapplication_extension,
3872 options::OPT_fno_application_extension, false))
3873 CmdArgs.push_back("-fapplication-extension");
3875 // Handle GCC-style exception args.
3876 if (!C.getDriver().IsCLMode())
3877 addExceptionArgs(Args, InputType, getToolChain(), KernelOrKext, objcRuntime,
3880 if (Args.hasArg(options::OPT_fsjlj_exceptions) ||
3881 getToolChain().UseSjLjExceptions(Args))
3882 CmdArgs.push_back("-fsjlj-exceptions");
3884 // C++ "sane" operator new.
3885 if (!Args.hasFlag(options::OPT_fassume_sane_operator_new,
3886 options::OPT_fno_assume_sane_operator_new))
3887 CmdArgs.push_back("-fno-assume-sane-operator-new");
3889 // -frelaxed-template-template-args is off by default, as it is a severe
3890 // breaking change until a corresponding change to template partial ordering
3892 if (Args.hasFlag(options::OPT_frelaxed_template_template_args,
3893 options::OPT_fno_relaxed_template_template_args, false))
3894 CmdArgs.push_back("-frelaxed-template-template-args");
3896 // -fsized-deallocation is off by default, as it is an ABI-breaking change for
3898 if (Args.hasFlag(options::OPT_fsized_deallocation,
3899 options::OPT_fno_sized_deallocation, false))
3900 CmdArgs.push_back("-fsized-deallocation");
3902 // -faligned-allocation is on by default in C++17 onwards and otherwise off
3904 if (Arg *A = Args.getLastArg(options::OPT_faligned_allocation,
3905 options::OPT_fno_aligned_allocation,
3906 options::OPT_faligned_new_EQ)) {
3907 if (A->getOption().matches(options::OPT_fno_aligned_allocation))
3908 CmdArgs.push_back("-fno-aligned-allocation");
3910 CmdArgs.push_back("-faligned-allocation");
3913 // The default new alignment can be specified using a dedicated option or via
3914 // a GCC-compatible option that also turns on aligned allocation.
3915 if (Arg *A = Args.getLastArg(options::OPT_fnew_alignment_EQ,
3916 options::OPT_faligned_new_EQ))
3918 Args.MakeArgString(Twine("-fnew-alignment=") + A->getValue()));
3920 // -fconstant-cfstrings is default, and may be subject to argument translation
3922 if (!Args.hasFlag(options::OPT_fconstant_cfstrings,
3923 options::OPT_fno_constant_cfstrings) ||
3924 !Args.hasFlag(options::OPT_mconstant_cfstrings,
3925 options::OPT_mno_constant_cfstrings))
3926 CmdArgs.push_back("-fno-constant-cfstrings");
3928 // -fshort-wchar default varies depending on platform; only
3929 // pass if specified.
3930 if (Arg *A = Args.getLastArg(options::OPT_fshort_wchar,
3931 options::OPT_fno_short_wchar))
3932 A->render(Args, CmdArgs);
3934 // -fno-pascal-strings is default, only pass non-default.
3935 if (Args.hasFlag(options::OPT_fpascal_strings,
3936 options::OPT_fno_pascal_strings, false))
3937 CmdArgs.push_back("-fpascal-strings");
3939 // Honor -fpack-struct= and -fpack-struct, if given. Note that
3940 // -fno-pack-struct doesn't apply to -fpack-struct=.
3941 if (Arg *A = Args.getLastArg(options::OPT_fpack_struct_EQ)) {
3942 std::string PackStructStr = "-fpack-struct=";
3943 PackStructStr += A->getValue();
3944 CmdArgs.push_back(Args.MakeArgString(PackStructStr));
3945 } else if (Args.hasFlag(options::OPT_fpack_struct,
3946 options::OPT_fno_pack_struct, false)) {
3947 CmdArgs.push_back("-fpack-struct=1");
3950 // Handle -fmax-type-align=N and -fno-type-align
3951 bool SkipMaxTypeAlign = Args.hasArg(options::OPT_fno_max_type_align);
3952 if (Arg *A = Args.getLastArg(options::OPT_fmax_type_align_EQ)) {
3953 if (!SkipMaxTypeAlign) {
3954 std::string MaxTypeAlignStr = "-fmax-type-align=";
3955 MaxTypeAlignStr += A->getValue();
3956 CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
3958 } else if (getToolChain().getTriple().isOSDarwin()) {
3959 if (!SkipMaxTypeAlign) {
3960 std::string MaxTypeAlignStr = "-fmax-type-align=16";
3961 CmdArgs.push_back(Args.MakeArgString(MaxTypeAlignStr));
3965 // -fcommon is the default unless compiling kernel code or the target says so
3966 bool NoCommonDefault =
3967 KernelOrKext || isNoCommonDefault(getToolChain().getTriple());
3968 if (!Args.hasFlag(options::OPT_fcommon, options::OPT_fno_common,
3970 CmdArgs.push_back("-fno-common");
3972 // -fsigned-bitfields is default, and clang doesn't yet support
3973 // -funsigned-bitfields.
3974 if (!Args.hasFlag(options::OPT_fsigned_bitfields,
3975 options::OPT_funsigned_bitfields))
3976 D.Diag(diag::warn_drv_clang_unsupported)
3977 << Args.getLastArg(options::OPT_funsigned_bitfields)->getAsString(Args);
3979 // -fsigned-bitfields is default, and clang doesn't support -fno-for-scope.
3980 if (!Args.hasFlag(options::OPT_ffor_scope, options::OPT_fno_for_scope))
3981 D.Diag(diag::err_drv_clang_unsupported)
3982 << Args.getLastArg(options::OPT_fno_for_scope)->getAsString(Args);
3984 // -finput_charset=UTF-8 is default. Reject others
3985 if (Arg *inputCharset = Args.getLastArg(options::OPT_finput_charset_EQ)) {
3986 StringRef value = inputCharset->getValue();
3987 if (!value.equals_lower("utf-8"))
3988 D.Diag(diag::err_drv_invalid_value) << inputCharset->getAsString(Args)
3992 // -fexec_charset=UTF-8 is default. Reject others
3993 if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) {
3994 StringRef value = execCharset->getValue();
3995 if (!value.equals_lower("utf-8"))
3996 D.Diag(diag::err_drv_invalid_value) << execCharset->getAsString(Args)
4000 bool CaretDefault = true;
4001 bool ColumnDefault = true;
4002 if (Arg *DiagArg = Args.getLastArg(options::OPT__SLASH_diagnostics_classic,
4003 options::OPT__SLASH_diagnostics_column,
4004 options::OPT__SLASH_diagnostics_caret)) {
4005 switch (DiagArg->getOption().getID()) {
4006 case options::OPT__SLASH_diagnostics_caret:
4007 CaretDefault = true;
4008 ColumnDefault = true;
4010 case options::OPT__SLASH_diagnostics_column:
4011 CaretDefault = false;
4012 ColumnDefault = true;
4014 case options::OPT__SLASH_diagnostics_classic:
4015 CaretDefault = false;
4016 ColumnDefault = false;
4021 // -fcaret-diagnostics is default.
4022 if (!Args.hasFlag(options::OPT_fcaret_diagnostics,
4023 options::OPT_fno_caret_diagnostics, CaretDefault))
4024 CmdArgs.push_back("-fno-caret-diagnostics");
4026 // -fdiagnostics-fixit-info is default, only pass non-default.
4027 if (!Args.hasFlag(options::OPT_fdiagnostics_fixit_info,
4028 options::OPT_fno_diagnostics_fixit_info))
4029 CmdArgs.push_back("-fno-diagnostics-fixit-info");
4031 // Enable -fdiagnostics-show-option by default.
4032 if (Args.hasFlag(options::OPT_fdiagnostics_show_option,
4033 options::OPT_fno_diagnostics_show_option))
4034 CmdArgs.push_back("-fdiagnostics-show-option");
4037 Args.getLastArg(options::OPT_fdiagnostics_show_category_EQ)) {
4038 CmdArgs.push_back("-fdiagnostics-show-category");
4039 CmdArgs.push_back(A->getValue());
4042 if (Args.hasFlag(options::OPT_fdiagnostics_show_hotness,
4043 options::OPT_fno_diagnostics_show_hotness, false))
4044 CmdArgs.push_back("-fdiagnostics-show-hotness");
4047 Args.getLastArg(options::OPT_fdiagnostics_hotness_threshold_EQ)) {
4048 std::string Opt = std::string("-fdiagnostics-hotness-threshold=") + A->getValue();
4049 CmdArgs.push_back(Args.MakeArgString(Opt));
4052 if (const Arg *A = Args.getLastArg(options::OPT_fdiagnostics_format_EQ)) {
4053 CmdArgs.push_back("-fdiagnostics-format");
4054 CmdArgs.push_back(A->getValue());
4057 if (Arg *A = Args.getLastArg(
4058 options::OPT_fdiagnostics_show_note_include_stack,
4059 options::OPT_fno_diagnostics_show_note_include_stack)) {
4060 if (A->getOption().matches(
4061 options::OPT_fdiagnostics_show_note_include_stack))
4062 CmdArgs.push_back("-fdiagnostics-show-note-include-stack");
4064 CmdArgs.push_back("-fno-diagnostics-show-note-include-stack");
4067 // Color diagnostics are parsed by the driver directly from argv
4068 // and later re-parsed to construct this job; claim any possible
4069 // color diagnostic here to avoid warn_drv_unused_argument and
4070 // diagnose bad OPT_fdiagnostics_color_EQ values.
4071 for (Arg *A : Args) {
4072 const Option &O = A->getOption();
4073 if (!O.matches(options::OPT_fcolor_diagnostics) &&
4074 !O.matches(options::OPT_fdiagnostics_color) &&
4075 !O.matches(options::OPT_fno_color_diagnostics) &&
4076 !O.matches(options::OPT_fno_diagnostics_color) &&
4077 !O.matches(options::OPT_fdiagnostics_color_EQ))
4079 if (O.matches(options::OPT_fdiagnostics_color_EQ)) {
4080 StringRef Value(A->getValue());
4081 if (Value != "always" && Value != "never" && Value != "auto")
4082 getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported)
4083 << ("-fdiagnostics-color=" + Value).str();
4087 if (D.getDiags().getDiagnosticOptions().ShowColors)
4088 CmdArgs.push_back("-fcolor-diagnostics");
4090 if (Args.hasArg(options::OPT_fansi_escape_codes))
4091 CmdArgs.push_back("-fansi-escape-codes");
4093 if (!Args.hasFlag(options::OPT_fshow_source_location,
4094 options::OPT_fno_show_source_location))
4095 CmdArgs.push_back("-fno-show-source-location");
4097 if (Args.hasArg(options::OPT_fdiagnostics_absolute_paths))
4098 CmdArgs.push_back("-fdiagnostics-absolute-paths");
4100 if (!Args.hasFlag(options::OPT_fshow_column, options::OPT_fno_show_column,
4102 CmdArgs.push_back("-fno-show-column");
4104 if (!Args.hasFlag(options::OPT_fspell_checking,
4105 options::OPT_fno_spell_checking))
4106 CmdArgs.push_back("-fno-spell-checking");
4108 // -fno-asm-blocks is default.
4109 if (Args.hasFlag(options::OPT_fasm_blocks, options::OPT_fno_asm_blocks,
4111 CmdArgs.push_back("-fasm-blocks");
4113 // -fgnu-inline-asm is default.
4114 if (!Args.hasFlag(options::OPT_fgnu_inline_asm,
4115 options::OPT_fno_gnu_inline_asm, true))
4116 CmdArgs.push_back("-fno-gnu-inline-asm");
4118 // Enable vectorization per default according to the optimization level
4119 // selected. For optimization levels that want vectorization we use the alias
4120 // option to simplify the hasFlag logic.
4121 bool EnableVec = shouldEnableVectorizerAtOLevel(Args, false);
4122 OptSpecifier VectorizeAliasOption =
4123 EnableVec ? options::OPT_O_Group : options::OPT_fvectorize;
4124 if (Args.hasFlag(options::OPT_fvectorize, VectorizeAliasOption,
4125 options::OPT_fno_vectorize, EnableVec))
4126 CmdArgs.push_back("-vectorize-loops");
4128 // -fslp-vectorize is enabled based on the optimization level selected.
4129 bool EnableSLPVec = shouldEnableVectorizerAtOLevel(Args, true);
4130 OptSpecifier SLPVectAliasOption =
4131 EnableSLPVec ? options::OPT_O_Group : options::OPT_fslp_vectorize;
4132 if (Args.hasFlag(options::OPT_fslp_vectorize, SLPVectAliasOption,
4133 options::OPT_fno_slp_vectorize, EnableSLPVec))
4134 CmdArgs.push_back("-vectorize-slp");
4136 if (Arg *A = Args.getLastArg(options::OPT_fshow_overloads_EQ))
4137 A->render(Args, CmdArgs);
4139 if (Arg *A = Args.getLastArg(
4140 options::OPT_fsanitize_undefined_strip_path_components_EQ))
4141 A->render(Args, CmdArgs);
4143 // -fdollars-in-identifiers default varies depending on platform and
4144 // language; only pass if specified.
4145 if (Arg *A = Args.getLastArg(options::OPT_fdollars_in_identifiers,
4146 options::OPT_fno_dollars_in_identifiers)) {
4147 if (A->getOption().matches(options::OPT_fdollars_in_identifiers))
4148 CmdArgs.push_back("-fdollars-in-identifiers");
4150 CmdArgs.push_back("-fno-dollars-in-identifiers");
4153 // -funit-at-a-time is default, and we don't support -fno-unit-at-a-time for
4154 // practical purposes.
4155 if (Arg *A = Args.getLastArg(options::OPT_funit_at_a_time,
4156 options::OPT_fno_unit_at_a_time)) {
4157 if (A->getOption().matches(options::OPT_fno_unit_at_a_time))
4158 D.Diag(diag::warn_drv_clang_unsupported) << A->getAsString(Args);
4161 if (Args.hasFlag(options::OPT_fapple_pragma_pack,
4162 options::OPT_fno_apple_pragma_pack, false))
4163 CmdArgs.push_back("-fapple-pragma-pack");
4165 // le32-specific flags:
4166 // -fno-math-builtin: clang should not convert math builtins to intrinsics
4168 if (getToolChain().getArch() == llvm::Triple::le32) {
4169 CmdArgs.push_back("-fno-math-builtin");
4172 if (Args.hasFlag(options::OPT_fsave_optimization_record,
4173 options::OPT_fno_save_optimization_record, false)) {
4174 CmdArgs.push_back("-opt-record-file");
4176 const Arg *A = Args.getLastArg(options::OPT_foptimization_record_file_EQ);
4178 CmdArgs.push_back(A->getValue());
4181 if (Output.isFilename() && (Args.hasArg(options::OPT_c) ||
4182 Args.hasArg(options::OPT_S))) {
4183 F = Output.getFilename();
4185 // Use the input filename.
4186 F = llvm::sys::path::stem(Input.getBaseInput());
4188 // If we're compiling for an offload architecture (i.e. a CUDA device),
4189 // we need to make the file name for the device compilation different
4190 // from the host compilation.
4191 if (!JA.isDeviceOffloading(Action::OFK_None) &&
4192 !JA.isDeviceOffloading(Action::OFK_Host)) {
4193 llvm::sys::path::replace_extension(F, "");
4194 F += Action::GetOffloadingFileNamePrefix(JA.getOffloadingDeviceKind(),
4195 Triple.normalize());
4197 F += JA.getOffloadingArch();
4201 llvm::sys::path::replace_extension(F, "opt.yaml");
4202 CmdArgs.push_back(Args.MakeArgString(F));
4206 // Default to -fno-builtin-str{cat,cpy} on Darwin for ARM.
4208 // FIXME: Now that PR4941 has been fixed this can be enabled.
4210 if (getToolChain().getTriple().isOSDarwin() &&
4211 (getToolChain().getArch() == llvm::Triple::arm ||
4212 getToolChain().getArch() == llvm::Triple::thumb)) {
4213 if (!Args.hasArg(options::OPT_fbuiltin_strcat))
4214 CmdArgs.push_back("-fno-builtin-strcat");
4215 if (!Args.hasArg(options::OPT_fbuiltin_strcpy))
4216 CmdArgs.push_back("-fno-builtin-strcpy");
4220 bool RewriteImports = Args.hasFlag(options::OPT_frewrite_imports,
4221 options::OPT_fno_rewrite_imports, false);
4223 CmdArgs.push_back("-frewrite-imports");
4225 // Enable rewrite includes if the user's asked for it or if we're generating
4227 // TODO: Once -module-dependency-dir works with -frewrite-includes it'd be
4228 // nice to enable this when doing a crashdump for modules as well.
4229 if (Args.hasFlag(options::OPT_frewrite_includes,
4230 options::OPT_fno_rewrite_includes, false) ||
4231 (C.isForDiagnostics() && (RewriteImports || !HaveAnyModules)))
4232 CmdArgs.push_back("-frewrite-includes");
4234 // Only allow -traditional or -traditional-cpp outside in preprocessing modes.
4235 if (Arg *A = Args.getLastArg(options::OPT_traditional,
4236 options::OPT_traditional_cpp)) {
4237 if (isa<PreprocessJobAction>(JA))
4238 CmdArgs.push_back("-traditional-cpp");
4240 D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
4243 Args.AddLastArg(CmdArgs, options::OPT_dM);
4244 Args.AddLastArg(CmdArgs, options::OPT_dD);
4246 // Handle serialized diagnostics.
4247 if (Arg *A = Args.getLastArg(options::OPT__serialize_diags)) {
4248 CmdArgs.push_back("-serialize-diagnostic-file");
4249 CmdArgs.push_back(Args.MakeArgString(A->getValue()));
4252 if (Args.hasArg(options::OPT_fretain_comments_from_system_headers))
4253 CmdArgs.push_back("-fretain-comments-from-system-headers");
4255 // Forward -fcomment-block-commands to -cc1.
4256 Args.AddAllArgs(CmdArgs, options::OPT_fcomment_block_commands);
4257 // Forward -fparse-all-comments to -cc1.
4258 Args.AddAllArgs(CmdArgs, options::OPT_fparse_all_comments);
4260 // Turn -fplugin=name.so into -load name.so
4261 for (const Arg *A : Args.filtered(options::OPT_fplugin_EQ)) {
4262 CmdArgs.push_back("-load");
4263 CmdArgs.push_back(A->getValue());
4267 // Setup statistics file output.
4268 if (const Arg *A = Args.getLastArg(options::OPT_save_stats_EQ)) {
4269 StringRef SaveStats = A->getValue();
4271 SmallString<128> StatsFile;
4272 bool DoSaveStats = false;
4273 if (SaveStats == "obj") {
4274 if (Output.isFilename()) {
4275 StatsFile.assign(Output.getFilename());
4276 llvm::sys::path::remove_filename(StatsFile);
4279 } else if (SaveStats == "cwd") {
4282 D.Diag(diag::err_drv_invalid_value) << A->getAsString(Args) << SaveStats;
4286 StringRef BaseName = llvm::sys::path::filename(Input.getBaseInput());
4287 llvm::sys::path::append(StatsFile, BaseName);
4288 llvm::sys::path::replace_extension(StatsFile, "stats");
4289 CmdArgs.push_back(Args.MakeArgString(Twine("-stats-file=") +
4294 // Forward -Xclang arguments to -cc1, and -mllvm arguments to the LLVM option
4296 // -finclude-default-header flag is for preprocessor,
4297 // do not pass it to other cc1 commands when save-temps is enabled
4298 if (C.getDriver().isSaveTempsEnabled() &&
4299 !isa<PreprocessJobAction>(JA)) {
4300 for (auto Arg : Args.filtered(options::OPT_Xclang)) {
4302 if (StringRef(Arg->getValue()) != "-finclude-default-header")
4303 CmdArgs.push_back(Arg->getValue());
4307 Args.AddAllArgValues(CmdArgs, options::OPT_Xclang);
4309 for (const Arg *A : Args.filtered(options::OPT_mllvm)) {
4312 // We translate this by hand to the -cc1 argument, since nightly test uses
4313 // it and developers have been trained to spell it with -mllvm. Both
4314 // spellings are now deprecated and should be removed.
4315 if (StringRef(A->getValue(0)) == "-disable-llvm-optzns") {
4316 CmdArgs.push_back("-disable-llvm-optzns");
4318 A->render(Args, CmdArgs);
4322 // With -save-temps, we want to save the unoptimized bitcode output from the
4323 // CompileJobAction, use -disable-llvm-passes to get pristine IR generated
4325 // When -fembed-bitcode is enabled, optimized bitcode is emitted because it
4326 // has slightly different breakdown between stages.
4327 // FIXME: -fembed-bitcode -save-temps will save optimized bitcode instead of
4328 // pristine IR generated by the frontend. Ideally, a new compile action should
4329 // be added so both IR can be captured.
4330 if (C.getDriver().isSaveTempsEnabled() &&
4331 !(C.getDriver().embedBitcodeInObject() && !C.getDriver().isUsingLTO()) &&
4332 isa<CompileJobAction>(JA))
4333 CmdArgs.push_back("-disable-llvm-passes");
4335 if (Output.getType() == types::TY_Dependencies) {
4336 // Handled with other dependency code.
4337 } else if (Output.isFilename()) {
4338 CmdArgs.push_back("-o");
4339 CmdArgs.push_back(Output.getFilename());
4341 assert(Output.isNothing() && "Invalid output.");
4344 addDashXForInput(Args, Input, CmdArgs);
4346 if (Input.isFilename())
4347 CmdArgs.push_back(Input.getFilename());
4349 Input.getInputArg().renderAsInput(Args, CmdArgs);
4351 Args.AddAllArgs(CmdArgs, options::OPT_undef);
4353 const char *Exec = getToolChain().getDriver().getClangProgramPath();
4355 // Optionally embed the -cc1 level arguments into the debug info, for build
4357 // Also record command line arguments into the debug info if
4358 // -grecord-gcc-switches options is set on.
4359 // By default, -gno-record-gcc-switches is set on and no recording.
4360 if (getToolChain().UseDwarfDebugFlags() ||
4361 Args.hasFlag(options::OPT_grecord_gcc_switches,
4362 options::OPT_gno_record_gcc_switches, false)) {
4363 ArgStringList OriginalArgs;
4364 for (const auto &Arg : Args)
4365 Arg->render(Args, OriginalArgs);
4367 SmallString<256> Flags;
4369 for (const char *OriginalArg : OriginalArgs) {
4370 SmallString<128> EscapedArg;
4371 EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
4373 Flags += EscapedArg;
4375 CmdArgs.push_back("-dwarf-debug-flags");
4376 CmdArgs.push_back(Args.MakeArgString(Flags));
4379 // Add the split debug info name to the command lines here so we
4380 // can propagate it to the backend.
4381 bool SplitDwarf = SplitDwarfArg && getToolChain().getTriple().isOSLinux() &&
4382 (isa<AssembleJobAction>(JA) || isa<CompileJobAction>(JA) ||
4383 isa<BackendJobAction>(JA));
4384 const char *SplitDwarfOut;
4386 CmdArgs.push_back("-split-dwarf-file");
4387 SplitDwarfOut = SplitDebugName(Args, Input);
4388 CmdArgs.push_back(SplitDwarfOut);
4391 // Host-side cuda compilation receives device-side outputs as Inputs[1...].
4392 // Include them with -fcuda-include-gpubinary.
4393 if (IsCuda && Inputs.size() > 1)
4394 for (auto I = std::next(Inputs.begin()), E = Inputs.end(); I != E; ++I) {
4395 CmdArgs.push_back("-fcuda-include-gpubinary");
4396 CmdArgs.push_back(I->getFilename());
4399 // OpenMP offloading device jobs take the argument -fopenmp-host-ir-file-path
4400 // to specify the result of the compile phase on the host, so the meaningful
4401 // device declarations can be identified. Also, -fopenmp-is-device is passed
4402 // along to tell the frontend that it is generating code for a device, so that
4403 // only the relevant declarations are emitted.
4404 if (IsOpenMPDevice) {
4405 CmdArgs.push_back("-fopenmp-is-device");
4406 if (Inputs.size() == 2) {
4407 CmdArgs.push_back("-fopenmp-host-ir-file-path");
4408 CmdArgs.push_back(Args.MakeArgString(Inputs.back().getFilename()));
4412 // For all the host OpenMP offloading compile jobs we need to pass the targets
4413 // information using -fopenmp-targets= option.
4414 if (isa<CompileJobAction>(JA) && JA.isHostOffloading(Action::OFK_OpenMP)) {
4415 SmallString<128> TargetInfo("-fopenmp-targets=");
4417 Arg *Tgts = Args.getLastArg(options::OPT_fopenmp_targets_EQ);
4418 assert(Tgts && Tgts->getNumValues() &&
4419 "OpenMP offloading has to have targets specified.");
4420 for (unsigned i = 0; i < Tgts->getNumValues(); ++i) {
4423 // We need to get the string from the triple because it may be not exactly
4424 // the same as the one we get directly from the arguments.
4425 llvm::Triple T(Tgts->getValue(i));
4426 TargetInfo += T.getTriple();
4428 CmdArgs.push_back(Args.MakeArgString(TargetInfo.str()));
4431 bool WholeProgramVTables =
4432 Args.hasFlag(options::OPT_fwhole_program_vtables,
4433 options::OPT_fno_whole_program_vtables, false);
4434 if (WholeProgramVTables) {
4435 if (!D.isUsingLTO())
4436 D.Diag(diag::err_drv_argument_only_allowed_with)
4437 << "-fwhole-program-vtables"
4439 CmdArgs.push_back("-fwhole-program-vtables");
4442 // Finally add the compile command to the compilation.
4443 if (Args.hasArg(options::OPT__SLASH_fallback) &&
4444 Output.getType() == types::TY_Object &&
4445 (InputType == types::TY_C || InputType == types::TY_CXX)) {
4447 getCLFallback()->GetCommand(C, JA, Output, Inputs, Args, LinkingOutput);
4448 C.addCommand(llvm::make_unique<FallbackCommand>(
4449 JA, *this, Exec, CmdArgs, Inputs, std::move(CLCommand)));
4450 } else if (Args.hasArg(options::OPT__SLASH_fallback) &&
4451 isa<PrecompileJobAction>(JA)) {
4452 // In /fallback builds, run the main compilation even if the pch generation
4453 // fails, so that the main compilation's fallback to cl.exe runs.
4454 C.addCommand(llvm::make_unique<ForceSuccessCommand>(JA, *this, Exec,
4457 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
4460 // Handle the debug info splitting at object creation time if we're
4461 // creating an object.
4462 // TODO: Currently only works on linux with newer objcopy.
4463 if (SplitDwarf && Output.getType() == types::TY_Object)
4464 SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output, SplitDwarfOut);
4466 if (Arg *A = Args.getLastArg(options::OPT_pg))
4467 if (Args.hasArg(options::OPT_fomit_frame_pointer))
4468 D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
4469 << A->getAsString(Args);
4471 // Claim some arguments which clang supports automatically.
4473 // -fpch-preprocess is used with gcc to add a special marker in the output to
4474 // include the PCH file. Clang's PTH solution is completely transparent, so we
4475 // do not need to deal with it at all.
4476 Args.ClaimAllArgs(options::OPT_fpch_preprocess);
4478 // Claim some arguments which clang doesn't support, but we don't
4479 // care to warn the user about.
4480 Args.ClaimAllArgs(options::OPT_clang_ignored_f_Group);
4481 Args.ClaimAllArgs(options::OPT_clang_ignored_m_Group);
4483 // Disable warnings for clang -E -emit-llvm foo.c
4484 Args.ClaimAllArgs(options::OPT_emit_llvm);
4487 Clang::Clang(const ToolChain &TC)
4488 // CAUTION! The first constructor argument ("clang") is not arbitrary,
4489 // as it is for other tools. Some operations on a Tool actually test
4490 // whether that tool is Clang based on the Tool's Name as a string.
4491 : Tool("clang", "clang frontend", TC, RF_Full) {}
4495 /// Add options related to the Objective-C runtime/ABI.
4497 /// Returns true if the runtime is non-fragile.
4498 ObjCRuntime Clang::AddObjCRuntimeArgs(const ArgList &args,
4499 ArgStringList &cmdArgs,
4500 RewriteKind rewriteKind) const {
4501 // Look for the controlling runtime option.
4503 args.getLastArg(options::OPT_fnext_runtime, options::OPT_fgnu_runtime,
4504 options::OPT_fobjc_runtime_EQ);
4506 // Just forward -fobjc-runtime= to the frontend. This supercedes
4507 // options about fragility.
4509 runtimeArg->getOption().matches(options::OPT_fobjc_runtime_EQ)) {
4510 ObjCRuntime runtime;
4511 StringRef value = runtimeArg->getValue();
4512 if (runtime.tryParse(value)) {
4513 getToolChain().getDriver().Diag(diag::err_drv_unknown_objc_runtime)
4517 runtimeArg->render(args, cmdArgs);
4521 // Otherwise, we'll need the ABI "version". Version numbers are
4522 // slightly confusing for historical reasons:
4523 // 1 - Traditional "fragile" ABI
4524 // 2 - Non-fragile ABI, version 1
4525 // 3 - Non-fragile ABI, version 2
4526 unsigned objcABIVersion = 1;
4527 // If -fobjc-abi-version= is present, use that to set the version.
4528 if (Arg *abiArg = args.getLastArg(options::OPT_fobjc_abi_version_EQ)) {
4529 StringRef value = abiArg->getValue();
4532 else if (value == "2")
4534 else if (value == "3")
4537 getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported) << value;
4539 // Otherwise, determine if we are using the non-fragile ABI.
4540 bool nonFragileABIIsDefault =
4541 (rewriteKind == RK_NonFragile ||
4542 (rewriteKind == RK_None &&
4543 getToolChain().IsObjCNonFragileABIDefault()));
4544 if (args.hasFlag(options::OPT_fobjc_nonfragile_abi,
4545 options::OPT_fno_objc_nonfragile_abi,
4546 nonFragileABIIsDefault)) {
4547 // Determine the non-fragile ABI version to use.
4548 #ifdef DISABLE_DEFAULT_NONFRAGILEABI_TWO
4549 unsigned nonFragileABIVersion = 1;
4551 unsigned nonFragileABIVersion = 2;
4555 args.getLastArg(options::OPT_fobjc_nonfragile_abi_version_EQ)) {
4556 StringRef value = abiArg->getValue();
4558 nonFragileABIVersion = 1;
4559 else if (value == "2")
4560 nonFragileABIVersion = 2;
4562 getToolChain().getDriver().Diag(diag::err_drv_clang_unsupported)
4566 objcABIVersion = 1 + nonFragileABIVersion;
4572 // We don't actually care about the ABI version other than whether
4573 // it's non-fragile.
4574 bool isNonFragile = objcABIVersion != 1;
4576 // If we have no runtime argument, ask the toolchain for its default runtime.
4577 // However, the rewriter only really supports the Mac runtime, so assume that.
4578 ObjCRuntime runtime;
4580 switch (rewriteKind) {
4582 runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
4585 runtime = ObjCRuntime(ObjCRuntime::FragileMacOSX, VersionTuple());
4588 runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
4593 } else if (runtimeArg->getOption().matches(options::OPT_fnext_runtime)) {
4594 // On Darwin, make this use the default behavior for the toolchain.
4595 if (getToolChain().getTriple().isOSDarwin()) {
4596 runtime = getToolChain().getDefaultObjCRuntime(isNonFragile);
4598 // Otherwise, build for a generic macosx port.
4600 runtime = ObjCRuntime(ObjCRuntime::MacOSX, VersionTuple());
4605 assert(runtimeArg->getOption().matches(options::OPT_fgnu_runtime));
4606 // Legacy behaviour is to target the gnustep runtime if we are in
4607 // non-fragile mode or the GCC runtime in fragile mode.
4609 runtime = ObjCRuntime(ObjCRuntime::GNUstep, VersionTuple(1, 6));
4611 runtime = ObjCRuntime(ObjCRuntime::GCC, VersionTuple());
4615 args.MakeArgString("-fobjc-runtime=" + runtime.getAsString()));
4619 static bool maybeConsumeDash(const std::string &EH, size_t &I) {
4620 bool HaveDash = (I + 1 < EH.size() && EH[I + 1] == '-');
4628 bool Asynch = false;
4629 bool NoUnwindC = false;
4631 } // end anonymous namespace
4633 /// /EH controls whether to run destructor cleanups when exceptions are
4634 /// thrown. There are three modifiers:
4635 /// - s: Cleanup after "synchronous" exceptions, aka C++ exceptions.
4636 /// - a: Cleanup after "asynchronous" exceptions, aka structured exceptions.
4637 /// The 'a' modifier is unimplemented and fundamentally hard in LLVM IR.
4638 /// - c: Assume that extern "C" functions are implicitly nounwind.
4639 /// The default is /EHs-c-, meaning cleanups are disabled.
4640 static EHFlags parseClangCLEHFlags(const Driver &D, const ArgList &Args) {
4643 std::vector<std::string> EHArgs =
4644 Args.getAllArgValues(options::OPT__SLASH_EH);
4645 for (auto EHVal : EHArgs) {
4646 for (size_t I = 0, E = EHVal.size(); I != E; ++I) {
4649 EH.Asynch = maybeConsumeDash(EHVal, I);
4654 EH.NoUnwindC = maybeConsumeDash(EHVal, I);
4657 EH.Synch = maybeConsumeDash(EHVal, I);
4664 D.Diag(clang::diag::err_drv_invalid_value) << "/EH" << EHVal;
4668 // The /GX, /GX- flags are only processed if there are not /EH flags.
4669 // The default is that /GX is not specified.
4670 if (EHArgs.empty() &&
4671 Args.hasFlag(options::OPT__SLASH_GX, options::OPT__SLASH_GX_,
4672 /*default=*/false)) {
4674 EH.NoUnwindC = true;
4680 void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType,
4681 ArgStringList &CmdArgs,
4682 codegenoptions::DebugInfoKind *DebugInfoKind,
4683 bool *EmitCodeView) const {
4684 unsigned RTOptionID = options::OPT__SLASH_MT;
4686 if (Args.hasArg(options::OPT__SLASH_LDd))
4687 // The /LDd option implies /MTd. The dependent lib part can be overridden,
4688 // but defining _DEBUG is sticky.
4689 RTOptionID = options::OPT__SLASH_MTd;
4691 if (Arg *A = Args.getLastArg(options::OPT__SLASH_M_Group))
4692 RTOptionID = A->getOption().getID();
4694 StringRef FlagForCRT;
4695 switch (RTOptionID) {
4696 case options::OPT__SLASH_MD:
4697 if (Args.hasArg(options::OPT__SLASH_LDd))
4698 CmdArgs.push_back("-D_DEBUG");
4699 CmdArgs.push_back("-D_MT");
4700 CmdArgs.push_back("-D_DLL");
4701 FlagForCRT = "--dependent-lib=msvcrt";
4703 case options::OPT__SLASH_MDd:
4704 CmdArgs.push_back("-D_DEBUG");
4705 CmdArgs.push_back("-D_MT");
4706 CmdArgs.push_back("-D_DLL");
4707 FlagForCRT = "--dependent-lib=msvcrtd";
4709 case options::OPT__SLASH_MT:
4710 if (Args.hasArg(options::OPT__SLASH_LDd))
4711 CmdArgs.push_back("-D_DEBUG");
4712 CmdArgs.push_back("-D_MT");
4713 CmdArgs.push_back("-flto-visibility-public-std");
4714 FlagForCRT = "--dependent-lib=libcmt";
4716 case options::OPT__SLASH_MTd:
4717 CmdArgs.push_back("-D_DEBUG");
4718 CmdArgs.push_back("-D_MT");
4719 CmdArgs.push_back("-flto-visibility-public-std");
4720 FlagForCRT = "--dependent-lib=libcmtd";
4723 llvm_unreachable("Unexpected option ID.");
4726 if (Args.hasArg(options::OPT__SLASH_Zl)) {
4727 CmdArgs.push_back("-D_VC_NODEFAULTLIB");
4729 CmdArgs.push_back(FlagForCRT.data());
4731 // This provides POSIX compatibility (maps 'open' to '_open'), which most
4732 // users want. The /Za flag to cl.exe turns this off, but it's not
4733 // implemented in clang.
4734 CmdArgs.push_back("--dependent-lib=oldnames");
4737 // Both /showIncludes and /E (and /EP) write to stdout. Allowing both
4738 // would produce interleaved output, so ignore /showIncludes in such cases.
4739 if (!Args.hasArg(options::OPT_E) && !Args.hasArg(options::OPT__SLASH_EP))
4740 if (Arg *A = Args.getLastArg(options::OPT_show_includes))
4741 A->render(Args, CmdArgs);
4743 // This controls whether or not we emit RTTI data for polymorphic types.
4744 if (Args.hasFlag(options::OPT__SLASH_GR_, options::OPT__SLASH_GR,
4746 CmdArgs.push_back("-fno-rtti-data");
4748 // This controls whether or not we emit stack-protector instrumentation.
4749 // In MSVC, Buffer Security Check (/GS) is on by default.
4750 if (Args.hasFlag(options::OPT__SLASH_GS, options::OPT__SLASH_GS_,
4751 /*default=*/true)) {
4752 CmdArgs.push_back("-stack-protector");
4753 CmdArgs.push_back(Args.MakeArgString(Twine(LangOptions::SSPStrong)));
4756 // Emit CodeView if -Z7, -Zd, or -gline-tables-only are present.
4757 if (Arg *DebugInfoArg =
4758 Args.getLastArg(options::OPT__SLASH_Z7, options::OPT__SLASH_Zd,
4759 options::OPT_gline_tables_only)) {
4760 *EmitCodeView = true;
4761 if (DebugInfoArg->getOption().matches(options::OPT__SLASH_Z7))
4762 *DebugInfoKind = codegenoptions::LimitedDebugInfo;
4764 *DebugInfoKind = codegenoptions::DebugLineTablesOnly;
4765 CmdArgs.push_back("-gcodeview");
4767 *EmitCodeView = false;
4770 const Driver &D = getToolChain().getDriver();
4771 EHFlags EH = parseClangCLEHFlags(D, Args);
4772 if (EH.Synch || EH.Asynch) {
4773 if (types::isCXX(InputType))
4774 CmdArgs.push_back("-fcxx-exceptions");
4775 CmdArgs.push_back("-fexceptions");
4777 if (types::isCXX(InputType) && EH.Synch && EH.NoUnwindC)
4778 CmdArgs.push_back("-fexternc-nounwind");
4780 // /EP should expand to -E -P.
4781 if (Args.hasArg(options::OPT__SLASH_EP)) {
4782 CmdArgs.push_back("-E");
4783 CmdArgs.push_back("-P");
4786 unsigned VolatileOptionID;
4787 if (getToolChain().getArch() == llvm::Triple::x86_64 ||
4788 getToolChain().getArch() == llvm::Triple::x86)
4789 VolatileOptionID = options::OPT__SLASH_volatile_ms;
4791 VolatileOptionID = options::OPT__SLASH_volatile_iso;
4793 if (Arg *A = Args.getLastArg(options::OPT__SLASH_volatile_Group))
4794 VolatileOptionID = A->getOption().getID();
4796 if (VolatileOptionID == options::OPT__SLASH_volatile_ms)
4797 CmdArgs.push_back("-fms-volatile");
4799 Arg *MostGeneralArg = Args.getLastArg(options::OPT__SLASH_vmg);
4800 Arg *BestCaseArg = Args.getLastArg(options::OPT__SLASH_vmb);
4801 if (MostGeneralArg && BestCaseArg)
4802 D.Diag(clang::diag::err_drv_argument_not_allowed_with)
4803 << MostGeneralArg->getAsString(Args) << BestCaseArg->getAsString(Args);
4805 if (MostGeneralArg) {
4806 Arg *SingleArg = Args.getLastArg(options::OPT__SLASH_vms);
4807 Arg *MultipleArg = Args.getLastArg(options::OPT__SLASH_vmm);
4808 Arg *VirtualArg = Args.getLastArg(options::OPT__SLASH_vmv);
4810 Arg *FirstConflict = SingleArg ? SingleArg : MultipleArg;
4811 Arg *SecondConflict = VirtualArg ? VirtualArg : MultipleArg;
4812 if (FirstConflict && SecondConflict && FirstConflict != SecondConflict)
4813 D.Diag(clang::diag::err_drv_argument_not_allowed_with)
4814 << FirstConflict->getAsString(Args)
4815 << SecondConflict->getAsString(Args);
4818 CmdArgs.push_back("-fms-memptr-rep=single");
4819 else if (MultipleArg)
4820 CmdArgs.push_back("-fms-memptr-rep=multiple");
4822 CmdArgs.push_back("-fms-memptr-rep=virtual");
4825 // Parse the default calling convention options.
4827 Args.getLastArg(options::OPT__SLASH_Gd, options::OPT__SLASH_Gr,
4828 options::OPT__SLASH_Gz, options::OPT__SLASH_Gv)) {
4829 unsigned DCCOptId = CCArg->getOption().getID();
4830 const char *DCCFlag = nullptr;
4831 bool ArchSupported = true;
4832 llvm::Triple::ArchType Arch = getToolChain().getArch();
4834 case options::OPT__SLASH_Gd:
4835 DCCFlag = "-fdefault-calling-conv=cdecl";
4837 case options::OPT__SLASH_Gr:
4838 ArchSupported = Arch == llvm::Triple::x86;
4839 DCCFlag = "-fdefault-calling-conv=fastcall";
4841 case options::OPT__SLASH_Gz:
4842 ArchSupported = Arch == llvm::Triple::x86;
4843 DCCFlag = "-fdefault-calling-conv=stdcall";
4845 case options::OPT__SLASH_Gv:
4846 ArchSupported = Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64;
4847 DCCFlag = "-fdefault-calling-conv=vectorcall";
4851 // MSVC doesn't warn if /Gr or /Gz is used on x64, so we don't either.
4852 if (ArchSupported && DCCFlag)
4853 CmdArgs.push_back(DCCFlag);
4856 if (Arg *A = Args.getLastArg(options::OPT_vtordisp_mode_EQ))
4857 A->render(Args, CmdArgs);
4859 if (!Args.hasArg(options::OPT_fdiagnostics_format_EQ)) {
4860 CmdArgs.push_back("-fdiagnostics-format");
4861 if (Args.hasArg(options::OPT__SLASH_fallback))
4862 CmdArgs.push_back("msvc-fallback");
4864 CmdArgs.push_back("msvc");
4868 visualstudio::Compiler *Clang::getCLFallback() const {
4870 CLFallback.reset(new visualstudio::Compiler(getToolChain()));
4871 return CLFallback.get();
4875 const char *Clang::getBaseInputName(const ArgList &Args,
4876 const InputInfo &Input) {
4877 return Args.MakeArgString(llvm::sys::path::filename(Input.getBaseInput()));
4880 const char *Clang::getBaseInputStem(const ArgList &Args,
4881 const InputInfoList &Inputs) {
4882 const char *Str = getBaseInputName(Args, Inputs[0]);
4884 if (const char *End = strrchr(Str, '.'))
4885 return Args.MakeArgString(std::string(Str, End));
4890 const char *Clang::getDependencyFileName(const ArgList &Args,
4891 const InputInfoList &Inputs) {
4892 // FIXME: Think about this more.
4895 if (Arg *OutputOpt = Args.getLastArg(options::OPT_o)) {
4896 std::string Str(OutputOpt->getValue());
4897 Res = Str.substr(0, Str.rfind('.'));
4899 Res = getBaseInputStem(Args, Inputs);
4901 return Args.MakeArgString(Res + ".d");
4906 void ClangAs::AddMIPSTargetArgs(const ArgList &Args,
4907 ArgStringList &CmdArgs) const {
4910 const llvm::Triple &Triple = getToolChain().getTriple();
4911 mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
4913 CmdArgs.push_back("-target-abi");
4914 CmdArgs.push_back(ABIName.data());
4917 void ClangAs::AddX86TargetArgs(const ArgList &Args,
4918 ArgStringList &CmdArgs) const {
4919 if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
4920 StringRef Value = A->getValue();
4921 if (Value == "intel" || Value == "att") {
4922 CmdArgs.push_back("-mllvm");
4923 CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
4925 getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
4926 << A->getOption().getName() << Value;
4931 void ClangAs::ConstructJob(Compilation &C, const JobAction &JA,
4932 const InputInfo &Output, const InputInfoList &Inputs,
4933 const ArgList &Args,
4934 const char *LinkingOutput) const {
4935 ArgStringList CmdArgs;
4937 assert(Inputs.size() == 1 && "Unexpected number of inputs.");
4938 const InputInfo &Input = Inputs[0];
4940 const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
4941 const std::string &TripleStr = Triple.getTriple();
4942 const auto &D = getToolChain().getDriver();
4944 // Don't warn about "clang -w -c foo.s"
4945 Args.ClaimAllArgs(options::OPT_w);
4946 // and "clang -emit-llvm -c foo.s"
4947 Args.ClaimAllArgs(options::OPT_emit_llvm);
4949 claimNoWarnArgs(Args);
4951 // Invoke ourselves in -cc1as mode.
4953 // FIXME: Implement custom jobs for internal actions.
4954 CmdArgs.push_back("-cc1as");
4956 // Add the "effective" target triple.
4957 CmdArgs.push_back("-triple");
4958 CmdArgs.push_back(Args.MakeArgString(TripleStr));
4960 // Set the output mode, we currently only expect to be used as a real
4962 CmdArgs.push_back("-filetype");
4963 CmdArgs.push_back("obj");
4965 // Set the main file name, so that debug info works even with
4966 // -save-temps or preprocessed assembly.
4967 CmdArgs.push_back("-main-file-name");
4968 CmdArgs.push_back(Clang::getBaseInputName(Args, Input));
4970 // Add the target cpu
4971 std::string CPU = getCPUName(Args, Triple, /*FromAs*/ true);
4973 CmdArgs.push_back("-target-cpu");
4974 CmdArgs.push_back(Args.MakeArgString(CPU));
4977 // Add the target features
4978 getTargetFeatures(getToolChain(), Triple, Args, CmdArgs, true);
4980 // Ignore explicit -force_cpusubtype_ALL option.
4981 (void)Args.hasArg(options::OPT_force__cpusubtype__ALL);
4983 // Pass along any -I options so we get proper .include search paths.
4984 Args.AddAllArgs(CmdArgs, options::OPT_I_Group);
4986 // Determine the original source input.
4987 const Action *SourceAction = &JA;
4988 while (SourceAction->getKind() != Action::InputClass) {
4989 assert(!SourceAction->getInputs().empty() && "unexpected root action!");
4990 SourceAction = SourceAction->getInputs()[0];
4993 // Forward -g and handle debug info related flags, assuming we are dealing
4994 // with an actual assembly file.
4995 bool WantDebug = false;
4996 unsigned DwarfVersion = 0;
4997 Args.ClaimAllArgs(options::OPT_g_Group);
4998 if (Arg *A = Args.getLastArg(options::OPT_g_Group)) {
4999 WantDebug = !A->getOption().matches(options::OPT_g0) &&
5000 !A->getOption().matches(options::OPT_ggdb0);
5002 DwarfVersion = DwarfVersionNum(A->getSpelling());
5004 if (DwarfVersion == 0)
5005 DwarfVersion = getToolChain().GetDefaultDwarfVersion();
5007 codegenoptions::DebugInfoKind DebugInfoKind = codegenoptions::NoDebugInfo;
5009 if (SourceAction->getType() == types::TY_Asm ||
5010 SourceAction->getType() == types::TY_PP_Asm) {
5011 // You might think that it would be ok to set DebugInfoKind outside of
5012 // the guard for source type, however there is a test which asserts
5013 // that some assembler invocation receives no -debug-info-kind,
5014 // and it's not clear whether that test is just overly restrictive.
5015 DebugInfoKind = (WantDebug ? codegenoptions::LimitedDebugInfo
5016 : codegenoptions::NoDebugInfo);
5017 // Add the -fdebug-compilation-dir flag if needed.
5018 addDebugCompDirArg(Args, CmdArgs);
5020 // Set the AT_producer to the clang version when using the integrated
5021 // assembler on assembly source files.
5022 CmdArgs.push_back("-dwarf-debug-producer");
5023 CmdArgs.push_back(Args.MakeArgString(getClangFullVersion()));
5025 // And pass along -I options
5026 Args.AddAllArgs(CmdArgs, options::OPT_I);
5028 RenderDebugEnablingArgs(Args, CmdArgs, DebugInfoKind, DwarfVersion,
5029 llvm::DebuggerKind::Default);
5030 RenderDebugInfoCompressionArgs(Args, CmdArgs, D);
5033 // Handle -fPIC et al -- the relocation-model affects the assembler
5034 // for some targets.
5035 llvm::Reloc::Model RelocationModel;
5038 std::tie(RelocationModel, PICLevel, IsPIE) =
5039 ParsePICArgs(getToolChain(), Args);
5041 const char *RMName = RelocationModelName(RelocationModel);
5043 CmdArgs.push_back("-mrelocation-model");
5044 CmdArgs.push_back(RMName);
5047 // Optionally embed the -cc1as level arguments into the debug info, for build
5049 if (getToolChain().UseDwarfDebugFlags()) {
5050 ArgStringList OriginalArgs;
5051 for (const auto &Arg : Args)
5052 Arg->render(Args, OriginalArgs);
5054 SmallString<256> Flags;
5055 const char *Exec = getToolChain().getDriver().getClangProgramPath();
5057 for (const char *OriginalArg : OriginalArgs) {
5058 SmallString<128> EscapedArg;
5059 EscapeSpacesAndBackslashes(OriginalArg, EscapedArg);
5061 Flags += EscapedArg;
5063 CmdArgs.push_back("-dwarf-debug-flags");
5064 CmdArgs.push_back(Args.MakeArgString(Flags));
5067 // FIXME: Add -static support, once we have it.
5069 // Add target specific flags.
5070 switch (getToolChain().getArch()) {
5074 case llvm::Triple::mips:
5075 case llvm::Triple::mipsel:
5076 case llvm::Triple::mips64:
5077 case llvm::Triple::mips64el:
5078 AddMIPSTargetArgs(Args, CmdArgs);
5081 case llvm::Triple::x86:
5082 case llvm::Triple::x86_64:
5083 AddX86TargetArgs(Args, CmdArgs);
5086 case llvm::Triple::arm:
5087 case llvm::Triple::armeb:
5088 case llvm::Triple::thumb:
5089 case llvm::Triple::thumbeb:
5090 // This isn't in AddARMTargetArgs because we want to do this for assembly
5092 if (Args.hasFlag(options::OPT_mdefault_build_attributes,
5093 options::OPT_mno_default_build_attributes, true)) {
5094 CmdArgs.push_back("-mllvm");
5095 CmdArgs.push_back("-arm-add-build-attributes");
5100 // Consume all the warning flags. Usually this would be handled more
5101 // gracefully by -cc1 (warning about unknown warning flags, etc) but -cc1as
5102 // doesn't handle that so rather than warning about unused flags that are
5103 // actually used, we'll lie by omission instead.
5104 // FIXME: Stop lying and consume only the appropriate driver flags
5105 Args.ClaimAllArgs(options::OPT_W_Group);
5107 CollectArgsForIntegratedAssembler(C, Args, CmdArgs,
5108 getToolChain().getDriver());
5110 Args.AddAllArgs(CmdArgs, options::OPT_mllvm);
5112 assert(Output.isFilename() && "Unexpected lipo output.");
5113 CmdArgs.push_back("-o");
5114 CmdArgs.push_back(Output.getFilename());
5116 assert(Input.isFilename() && "Invalid input.");
5117 CmdArgs.push_back(Input.getFilename());
5119 const char *Exec = getToolChain().getDriver().getClangProgramPath();
5120 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
5122 // Handle the debug info splitting at object creation time if we're
5123 // creating an object.
5124 // TODO: Currently only works on linux with newer objcopy.
5125 if (Args.hasArg(options::OPT_gsplit_dwarf) &&
5126 getToolChain().getTriple().isOSLinux())
5127 SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
5128 SplitDebugName(Args, Input));
5131 // Begin OffloadBundler
5133 void OffloadBundler::ConstructJob(Compilation &C, const JobAction &JA,
5134 const InputInfo &Output,
5135 const InputInfoList &Inputs,
5136 const llvm::opt::ArgList &TCArgs,
5137 const char *LinkingOutput) const {
5138 // The version with only one output is expected to refer to a bundling job.
5139 assert(isa<OffloadBundlingJobAction>(JA) && "Expecting bundling job!");
5141 // The bundling command looks like this:
5142 // clang-offload-bundler -type=bc
5143 // -targets=host-triple,openmp-triple1,openmp-triple2
5144 // -outputs=input_file
5145 // -inputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2"
5147 ArgStringList CmdArgs;
5150 CmdArgs.push_back(TCArgs.MakeArgString(
5151 Twine("-type=") + types::getTypeTempSuffix(Output.getType())));
5153 assert(JA.getInputs().size() == Inputs.size() &&
5154 "Not have inputs for all dependence actions??");
5157 SmallString<128> Triples;
5158 Triples += "-targets=";
5159 for (unsigned I = 0; I < Inputs.size(); ++I) {
5163 Action::OffloadKind CurKind = Action::OFK_Host;
5164 const ToolChain *CurTC = &getToolChain();
5165 const Action *CurDep = JA.getInputs()[I];
5167 if (const auto *OA = dyn_cast<OffloadAction>(CurDep)) {
5168 OA->doOnEachDependence([&](Action *A, const ToolChain *TC, const char *) {
5169 CurKind = A->getOffloadingDeviceKind();
5173 Triples += Action::GetOffloadKindName(CurKind);
5175 Triples += CurTC->getTriple().normalize();
5177 CmdArgs.push_back(TCArgs.MakeArgString(Triples));
5179 // Get bundled file command.
5181 TCArgs.MakeArgString(Twine("-outputs=") + Output.getFilename()));
5183 // Get unbundled files command.
5184 SmallString<128> UB;
5186 for (unsigned I = 0; I < Inputs.size(); ++I) {
5189 UB += Inputs[I].getFilename();
5191 CmdArgs.push_back(TCArgs.MakeArgString(UB));
5193 // All the inputs are encoded as commands.
5194 C.addCommand(llvm::make_unique<Command>(
5196 TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),
5200 void OffloadBundler::ConstructJobMultipleOutputs(
5201 Compilation &C, const JobAction &JA, const InputInfoList &Outputs,
5202 const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs,
5203 const char *LinkingOutput) const {
5204 // The version with multiple outputs is expected to refer to a unbundling job.
5205 auto &UA = cast<OffloadUnbundlingJobAction>(JA);
5207 // The unbundling command looks like this:
5208 // clang-offload-bundler -type=bc
5209 // -targets=host-triple,openmp-triple1,openmp-triple2
5210 // -inputs=input_file
5211 // -outputs=unbundle_file_host,unbundle_file_tgt1,unbundle_file_tgt2"
5214 ArgStringList CmdArgs;
5216 assert(Inputs.size() == 1 && "Expecting to unbundle a single file!");
5217 InputInfo Input = Inputs.front();
5220 CmdArgs.push_back(TCArgs.MakeArgString(
5221 Twine("-type=") + types::getTypeTempSuffix(Input.getType())));
5224 SmallString<128> Triples;
5225 Triples += "-targets=";
5226 auto DepInfo = UA.getDependentActionsInfo();
5227 for (unsigned I = 0; I < DepInfo.size(); ++I) {
5231 auto &Dep = DepInfo[I];
5232 Triples += Action::GetOffloadKindName(Dep.DependentOffloadKind);
5234 Triples += Dep.DependentToolChain->getTriple().normalize();
5237 CmdArgs.push_back(TCArgs.MakeArgString(Triples));
5239 // Get bundled file command.
5241 TCArgs.MakeArgString(Twine("-inputs=") + Input.getFilename()));
5243 // Get unbundled files command.
5244 SmallString<128> UB;
5246 for (unsigned I = 0; I < Outputs.size(); ++I) {
5249 UB += Outputs[I].getFilename();
5251 CmdArgs.push_back(TCArgs.MakeArgString(UB));
5252 CmdArgs.push_back("-unbundle");
5254 // All the inputs are encoded as commands.
5255 C.addCommand(llvm::make_unique<Command>(
5257 TCArgs.MakeArgString(getToolChain().GetProgramPath(getShortName())),