diff options
Diffstat (limited to 'clang/lib/Driver')
| -rw-r--r-- | clang/lib/Driver/Tools.cpp | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp index bc64d5c7fc1..c5bf7e48ced 100644 --- a/clang/lib/Driver/Tools.cpp +++ b/clang/lib/Driver/Tools.cpp @@ -1423,7 +1423,8 @@ static void AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args, CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU)); } -static void getX86TargetFeatures(const llvm::Triple &Triple, +static void getX86TargetFeatures(const Driver & D, + const llvm::Triple &Triple, const ArgList &Args, std::vector<const char *> &Features) { if (Triple.getArchName() == "x86_64h") { @@ -1446,6 +1447,31 @@ static void getX86TargetFeatures(const llvm::Triple &Triple, Features.push_back("+ssse3"); } + // Set features according to the -arch flag on MSVC + if (Arg *A = Args.getLastArg(options::OPT__SLASH_arch)) { + StringRef Arch = A->getValue(); + bool ArchUsed = false; + // First, look for flags that are shared in x86 and x86-64. + if (Triple.getArch() == llvm::Triple::x86_64 || + Triple.getArch() == llvm::Triple::x86) { + if (Arch == "AVX" || Arch == "AVX2") { + ArchUsed = true; + Features.push_back(Args.MakeArgString("+" + Arch.lower())); + } + } + // Then, look for x86-specific flags. + if (Triple.getArch() == llvm::Triple::x86) { + if (Arch == "IA32") { + ArchUsed = true; + } else if (Arch == "SSE" || Arch == "SSE2") { + ArchUsed = true; + Features.push_back(Args.MakeArgString("+" + Arch.lower())); + } + } + if (!ArchUsed) + D.Diag(clang::diag::warn_drv_unused_argument) << A->getAsString(Args); + } + // Now add any that the user explicitly requested on the command line, // which may override the defaults. for (arg_iterator it = Args.filtered_begin(options::OPT_m_x86_Features_Group), @@ -1608,7 +1634,7 @@ static void getTargetFeatures(const Driver &D, const llvm::Triple &Triple, break; case llvm::Triple::x86: case llvm::Triple::x86_64: - getX86TargetFeatures(Triple, Args, Features); + getX86TargetFeatures(D, Triple, Args, Features); break; } |
