| //===--- ToolChain.cpp - Collections of tools for one platform ------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Driver/ToolChain.h" |
| #include "clang/Basic/ObjCRuntime.h" |
| #include "clang/Driver/Action.h" |
| #include "clang/Driver/Arg.h" |
| #include "clang/Driver/ArgList.h" |
| #include "clang/Driver/Driver.h" |
| #include "clang/Driver/DriverDiagnostic.h" |
| #include "clang/Driver/Option.h" |
| #include "clang/Driver/Options.h" |
| #include "llvm/ADT/StringSwitch.h" |
| #include "llvm/Support/ErrorHandling.h" |
| using namespace clang::driver; |
| using namespace clang; |
| |
| ToolChain::ToolChain(const Driver &D, const llvm::Triple &T) |
| : D(D), Triple(T) { |
| } |
| |
| ToolChain::~ToolChain() { |
| } |
| |
| const Driver &ToolChain::getDriver() const { |
| return D; |
| } |
| |
| std::string ToolChain::getDefaultUniversalArchName() const { |
| // In universal driver terms, the arch name accepted by -arch isn't exactly |
| // the same as the ones that appear in the triple. Roughly speaking, this is |
| // an inverse of the darwin::getArchTypeForDarwinArchName() function, but the |
| // only interesting special case is powerpc. |
| switch (Triple.getArch()) { |
| case llvm::Triple::ppc: |
| return "ppc"; |
| case llvm::Triple::ppc64: |
| return "ppc64"; |
| default: |
| return Triple.getArchName(); |
| } |
| } |
| |
| bool ToolChain::IsUnwindTablesDefault() const { |
| return false; |
| } |
| |
| std::string ToolChain::GetFilePath(const char *Name) const { |
| return D.GetFilePath(Name, *this); |
| |
| } |
| |
| std::string ToolChain::GetProgramPath(const char *Name) const { |
| return D.GetProgramPath(Name, *this); |
| } |
| |
| types::ID ToolChain::LookupTypeForExtension(const char *Ext) const { |
| return types::lookupTypeForExtension(Ext); |
| } |
| |
| bool ToolChain::HasNativeLLVMSupport() const { |
| return false; |
| } |
| |
| ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const { |
| return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC, |
| VersionTuple()); |
| } |
| |
| /// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting. |
| // |
| // FIXME: tblgen this. |
| static const char *getARMTargetCPU(const ArgList &Args, |
| const llvm::Triple &Triple) { |
| // For Darwin targets, the -arch option (which is translated to a |
| // corresponding -march option) should determine the architecture |
| // (and the Mach-O slice) regardless of any -mcpu options. |
| if (!Triple.isOSDarwin()) { |
| // FIXME: Warn on inconsistent use of -mcpu and -march. |
| // If we have -mcpu=, use that. |
| if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) |
| return A->getValue(); |
| } |
| |
| StringRef MArch; |
| if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) { |
| // Otherwise, if we have -march= choose the base CPU for that arch. |
| MArch = A->getValue(); |
| } else { |
| // Otherwise, use the Arch from the triple. |
| MArch = Triple.getArchName(); |
| } |
| |
| return llvm::StringSwitch<const char *>(MArch) |
| .Cases("armv2", "armv2a","arm2") |
| .Case("armv3", "arm6") |
| .Case("armv3m", "arm7m") |
| .Cases("armv4", "armv4t", "arm7tdmi") |
| .Cases("armv5", "armv5t", "arm10tdmi") |
| .Cases("armv5e", "armv5te", "arm1026ejs") |
| .Case("armv5tej", "arm926ej-s") |
| .Cases("armv6", "armv6k", "arm1136jf-s") |
| .Case("armv6j", "arm1136j-s") |
| .Cases("armv6z", "armv6zk", "arm1176jzf-s") |
| .Case("armv6t2", "arm1156t2-s") |
| .Cases("armv7", "armv7a", "armv7-a", "cortex-a8") |
| .Cases("armv7l", "armv7-l", "cortex-a8") |
| .Cases("armv7f", "armv7-f", "cortex-a9-mp") |
| .Cases("armv7s", "armv7-s", "swift") |
| .Cases("armv7r", "armv7-r", "cortex-r4", "cortex-r5") |
| .Cases("armv7m", "armv7-m", "cortex-m3") |
| .Case("ep9312", "ep9312") |
| .Case("iwmmxt", "iwmmxt") |
| .Case("xscale", "xscale") |
| .Cases("armv6m", "armv6-m", "cortex-m0") |
| // If all else failed, return the most base CPU LLVM supports. |
| .Default("arm7tdmi"); |
| } |
| |
| /// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular |
| /// CPU. |
| // |
| // FIXME: This is redundant with -mcpu, why does LLVM use this. |
| // FIXME: tblgen this, or kill it! |
| static const char *getLLVMArchSuffixForARM(StringRef CPU) { |
| return llvm::StringSwitch<const char *>(CPU) |
| .Cases("arm7tdmi", "arm7tdmi-s", "arm710t", "v4t") |
| .Cases("arm720t", "arm9", "arm9tdmi", "v4t") |
| .Cases("arm920", "arm920t", "arm922t", "v4t") |
| .Cases("arm940t", "ep9312","v4t") |
| .Cases("arm10tdmi", "arm1020t", "v5") |
| .Cases("arm9e", "arm926ej-s", "arm946e-s", "v5e") |
| .Cases("arm966e-s", "arm968e-s", "arm10e", "v5e") |
| .Cases("arm1020e", "arm1022e", "xscale", "iwmmxt", "v5e") |
| .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s", "v6") |
| .Cases("arm1176jzf-s", "mpcorenovfp", "mpcore", "v6") |
| .Cases("arm1156t2-s", "arm1156t2f-s", "v6t2") |
| .Cases("cortex-a8", "cortex-a9", "cortex-a15", "v7") |
| .Case("cortex-m3", "v7m") |
| .Case("cortex-m4", "v7m") |
| .Case("cortex-m0", "v6m") |
| .Case("cortex-a9-mp", "v7f") |
| .Case("swift", "v7s") |
| .Default(""); |
| } |
| |
| std::string ToolChain::ComputeLLVMTriple(const ArgList &Args, |
| types::ID InputType) const { |
| switch (getTriple().getArch()) { |
| default: |
| return getTripleString(); |
| |
| case llvm::Triple::arm: |
| case llvm::Triple::thumb: { |
| // FIXME: Factor into subclasses. |
| llvm::Triple Triple = getTriple(); |
| |
| // Thumb2 is the default for V7 on Darwin. |
| // |
| // FIXME: Thumb should just be another -target-feaure, not in the triple. |
| StringRef Suffix = |
| getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple)); |
| bool ThumbDefault = (Suffix.startswith("v7") && getTriple().isOSDarwin()); |
| std::string ArchName = "arm"; |
| |
| // Assembly files should start in ARM mode. |
| if (InputType != types::TY_PP_Asm && |
| Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault)) |
| ArchName = "thumb"; |
| Triple.setArchName(ArchName + Suffix.str()); |
| |
| return Triple.getTriple(); |
| } |
| } |
| } |
| |
| std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args, |
| types::ID InputType) const { |
| // Diagnose use of Darwin OS deployment target arguments on non-Darwin. |
| if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ, |
| options::OPT_miphoneos_version_min_EQ, |
| options::OPT_mios_simulator_version_min_EQ)) |
| getDriver().Diag(diag::err_drv_clang_unsupported) |
| << A->getAsString(Args); |
| |
| return ComputeLLVMTriple(Args, InputType); |
| } |
| |
| void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, |
| ArgStringList &CC1Args) const { |
| // Each toolchain should provide the appropriate include flags. |
| } |
| |
| void ToolChain::addClangTargetOptions(const ArgList &DriverArgs, |
| ArgStringList &CC1Args) const { |
| } |
| |
| ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType( |
| const ArgList &Args) const |
| { |
| if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) { |
| StringRef Value = A->getValue(); |
| if (Value == "compiler-rt") |
| return ToolChain::RLT_CompilerRT; |
| if (Value == "libgcc") |
| return ToolChain::RLT_Libgcc; |
| getDriver().Diag(diag::err_drv_invalid_rtlib_name) |
| << A->getAsString(Args); |
| } |
| |
| return GetDefaultRuntimeLibType(); |
| } |
| |
| ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{ |
| if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) { |
| StringRef Value = A->getValue(); |
| if (Value == "libc++") |
| return ToolChain::CST_Libcxx; |
| if (Value == "libstdc++") |
| return ToolChain::CST_Libstdcxx; |
| getDriver().Diag(diag::err_drv_invalid_stdlib_name) |
| << A->getAsString(Args); |
| } |
| |
| return ToolChain::CST_Libstdcxx; |
| } |
| |
| /// \brief Utility function to add a system include directory to CC1 arguments. |
| /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs, |
| ArgStringList &CC1Args, |
| const Twine &Path) { |
| CC1Args.push_back("-internal-isystem"); |
| CC1Args.push_back(DriverArgs.MakeArgString(Path)); |
| } |
| |
| /// \brief Utility function to add a system include directory with extern "C" |
| /// semantics to CC1 arguments. |
| /// |
| /// Note that this should be used rarely, and only for directories that |
| /// historically and for legacy reasons are treated as having implicit extern |
| /// "C" semantics. These semantics are *ignored* by and large today, but its |
| /// important to preserve the preprocessor changes resulting from the |
| /// classification. |
| /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs, |
| ArgStringList &CC1Args, |
| const Twine &Path) { |
| CC1Args.push_back("-internal-externc-isystem"); |
| CC1Args.push_back(DriverArgs.MakeArgString(Path)); |
| } |
| |
| /// \brief Utility function to add a list of system include directories to CC1. |
| /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs, |
| ArgStringList &CC1Args, |
| ArrayRef<StringRef> Paths) { |
| for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end(); |
| I != E; ++I) { |
| CC1Args.push_back("-internal-isystem"); |
| CC1Args.push_back(DriverArgs.MakeArgString(*I)); |
| } |
| } |
| |
| void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, |
| ArgStringList &CC1Args) const { |
| // Header search paths should be handled by each of the subclasses. |
| // Historically, they have not been, and instead have been handled inside of |
| // the CC1-layer frontend. As the logic is hoisted out, this generic function |
| // will slowly stop being called. |
| // |
| // While it is being called, replicate a bit of a hack to propagate the |
| // '-stdlib=' flag down to CC1 so that it can in turn customize the C++ |
| // header search paths with it. Once all systems are overriding this |
| // function, the CC1 flag and this line can be removed. |
| DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ); |
| } |
| |
| void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args, |
| ArgStringList &CmdArgs) const { |
| CXXStdlibType Type = GetCXXStdlibType(Args); |
| |
| switch (Type) { |
| case ToolChain::CST_Libcxx: |
| CmdArgs.push_back("-lc++"); |
| break; |
| |
| case ToolChain::CST_Libstdcxx: |
| CmdArgs.push_back("-lstdc++"); |
| break; |
| } |
| } |
| |
| void ToolChain::AddCCKextLibArgs(const ArgList &Args, |
| ArgStringList &CmdArgs) const { |
| CmdArgs.push_back("-lcc_kext"); |
| } |
| |
| bool ToolChain::AddFastMathRuntimeIfAvailable(const ArgList &Args, |
| ArgStringList &CmdArgs) const { |
| // Check if -ffast-math or -funsafe-math is enabled. |
| Arg *A = Args.getLastArg(options::OPT_ffast_math, |
| options::OPT_fno_fast_math, |
| options::OPT_funsafe_math_optimizations, |
| options::OPT_fno_unsafe_math_optimizations); |
| |
| if (!A || A->getOption().getID() == options::OPT_fno_fast_math || |
| A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations) |
| return false; |
| |
| // If crtfastmath.o exists add it to the arguments. |
| std::string Path = GetFilePath("crtfastmath.o"); |
| if (Path == "crtfastmath.o") // Not found. |
| return false; |
| |
| CmdArgs.push_back(Args.MakeArgString(Path)); |
| return true; |
| } |