diff options
Diffstat (limited to 'clang/lib/Driver/ToolChains/Arch/AArch64.cpp')
| -rw-r--r-- | clang/lib/Driver/ToolChains/Arch/AArch64.cpp | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/clang/lib/Driver/ToolChains/Arch/AArch64.cpp b/clang/lib/Driver/ToolChains/Arch/AArch64.cpp index ed8c7e94b013..0e354a49b59a 100644 --- a/clang/lib/Driver/ToolChains/Arch/AArch64.cpp +++ b/clang/lib/Driver/ToolChains/Arch/AArch64.cpp @@ -191,7 +191,7 @@ void aarch64::getAArch64TargetFeatures(const Driver &D, bool success = true; // Enable NEON by default. Features.push_back("+neon"); - llvm::StringRef WaMArch = ""; + llvm::StringRef WaMArch; if (ForAS) for (const auto *A : Args.filtered(options::OPT_Wa_COMMA, options::OPT_Xassembler)) @@ -201,7 +201,7 @@ void aarch64::getAArch64TargetFeatures(const Driver &D, // Call getAArch64ArchFeaturesFromMarch only if "-Wa,-march=" or // "-Xassembler -march" is detected. Otherwise it may return false // and causes Clang to error out. - if (WaMArch.size()) + if (!WaMArch.empty()) success = getAArch64ArchFeaturesFromMarch(D, WaMArch, Args, Features); else if ((A = Args.getLastArg(options::OPT_march_EQ))) success = getAArch64ArchFeaturesFromMarch(D, A->getValue(), Args, Features); @@ -222,8 +222,15 @@ void aarch64::getAArch64TargetFeatures(const Driver &D, success = getAArch64MicroArchFeaturesFromMcpu( D, getAArch64TargetCPU(Args, Triple, A), Args, Features); - if (!success) - D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args); + if (!success) { + auto Diag = D.Diag(diag::err_drv_clang_unsupported); + // If "-Wa,-march=" is used, 'WaMArch' will contain the argument's value, + // while 'A' is uninitialized. Only dereference 'A' in the other case. + if (!WaMArch.empty()) + Diag << "-march=" + WaMArch.str(); + else + Diag << A->getAsString(Args); + } if (Args.getLastArg(options::OPT_mgeneral_regs_only)) { Features.push_back("-fp-armv8"); |