diff options
Diffstat (limited to 'clang/lib')
| -rw-r--r-- | clang/lib/Driver/ToolChains/Arch/X86.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/clang/lib/Driver/ToolChains/Arch/X86.cpp b/clang/lib/Driver/ToolChains/Arch/X86.cpp index d1e0c8253b7..477e04485bf 100644 --- a/clang/lib/Driver/ToolChains/Arch/X86.cpp +++ b/clang/lib/Driver/ToolChains/Arch/X86.cpp @@ -146,6 +146,7 @@ void x86::getX86TargetFeatures(const Driver &D, const llvm::Triple &Triple, // flags). This is a bit hacky but keeps existing usages working. We should // consider deprecating this and instead warn if the user requests external // retpoline thunks and *doesn't* request some form of retpolines. + auto SpectreOpt = clang::driver::options::ID::OPT_INVALID; if (Args.hasArgNoClaim(options::OPT_mretpoline, options::OPT_mno_retpoline, options::OPT_mspeculative_load_hardening, options::OPT_mno_speculative_load_hardening)) { @@ -153,12 +154,14 @@ void x86::getX86TargetFeatures(const Driver &D, const llvm::Triple &Triple, false)) { Features.push_back("+retpoline-indirect-calls"); Features.push_back("+retpoline-indirect-branches"); + SpectreOpt = options::OPT_mretpoline; } else if (Args.hasFlag(options::OPT_mspeculative_load_hardening, options::OPT_mno_speculative_load_hardening, false)) { // On x86, speculative load hardening relies on at least using retpolines // for indirect calls. Features.push_back("+retpoline-indirect-calls"); + SpectreOpt = options::OPT_mspeculative_load_hardening; } } else if (Args.hasFlag(options::OPT_mretpoline_external_thunk, options::OPT_mno_retpoline_external_thunk, false)) { @@ -166,6 +169,20 @@ void x86::getX86TargetFeatures(const Driver &D, const llvm::Triple &Triple, // eventually switch to an error here. Features.push_back("+retpoline-indirect-calls"); Features.push_back("+retpoline-indirect-branches"); + SpectreOpt = options::OPT_mretpoline_external_thunk; + } + + auto LVIOpt = clang::driver::options::ID::OPT_INVALID; + if (Args.hasFlag(options::OPT_mlvi_cfi, options::OPT_mno_lvi_cfi, false)) { + Features.push_back("+lvi-cfi"); + LVIOpt = options::OPT_mlvi_cfi; + } + + if (SpectreOpt != clang::driver::options::ID::OPT_INVALID && + LVIOpt != clang::driver::options::ID::OPT_INVALID) { + D.Diag(diag::err_drv_argument_not_allowed_with) + << D.getOpts().getOptionName(SpectreOpt) + << D.getOpts().getOptionName(LVIOpt); } // Now add any that the user explicitly requested on the command line, |
