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| author | serge-sans-paille <sguelton@redhat.com> | 2020-01-16 11:56:41 +0100 |
|---|---|---|
| committer | serge-sans-paille <sguelton@redhat.com> | 2020-01-31 14:02:33 +0100 |
| commit | fd09f12f32f57564d619a28b8826d33ade47b12e (patch) | |
| tree | db57ca81252bf810e3b6dd0af6bf5789ac1c7a9a /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | 24f0b6b6d8e798f76621af9ea6ccda0568d28703 (diff) | |
| download | llvm-fd09f12f32f57564d619a28b8826d33ade47b12e.zip llvm-fd09f12f32f57564d619a28b8826d33ade47b12e.tar.gz llvm-fd09f12f32f57564d619a28b8826d33ade47b12e.tar.bz2 | |
Implement -fsemantic-interposition
First attempt at implementing -fsemantic-interposition.
Rely on GlobalValue::isInterposable that already captures most of the expected
behavior.
Rely on a ModuleFlag to state whether we should respect SemanticInterposition or
not. The default remains no.
So this should be a no-op if -fsemantic-interposition isn't used, and if it is,
isInterposable being already used in most optimisation, they should honor it
properly.
Note that it only impacts architecture compiled with -fPIC and no pie.
Differential Revision: https://reviews.llvm.org/D72829
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
| -rw-r--r-- | clang/lib/Frontend/CompilerInvocation.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp index a8dfd8a..335f8cd 100644 --- a/clang/lib/Frontend/CompilerInvocation.cpp +++ b/clang/lib/Frontend/CompilerInvocation.cpp @@ -3036,6 +3036,10 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK, Opts.setDefaultCallingConv(DefaultCC); } + // -fsemantic-interposition + Opts.SemanticInterposition = + Args.hasArg(OPT_fsemantic_interposition) && Opts.PICLevel && !Opts.PIE; + // -mrtd option if (Arg *A = Args.getLastArg(OPT_mrtd)) { if (Opts.getDefaultCallingConv() != LangOptions::DCC_None) |