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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-05-12 21:10:52 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-05-12 21:10:52 +0000 |
| commit | 29c2b4330ce07a7af7452cf3ad2528d0e31952b0 (patch) | |
| tree | f5699efd7c32a0f611d2e216c5ea9194407df768 /clang/lib/CodeGen/CodeGenModule.cpp | |
| parent | c4b649d50a08730ffd0869c849c8dbc215faf527 (diff) | |
| download | bcm5719-llvm-29c2b4330ce07a7af7452cf3ad2528d0e31952b0.tar.gz bcm5719-llvm-29c2b4330ce07a7af7452cf3ad2528d0e31952b0.zip | |
Add support for __attribute__((hot)) and __attribute__((cold)).
Currently cold functions are marked with the "optsize" attribute in CodeGen
so they are always optimized for size. The hot attribute is just ignored,
LLVM doesn't have a way to express hotness at the moment.
llvm-svn: 156723
Diffstat (limited to 'clang/lib/CodeGen/CodeGenModule.cpp')
| -rw-r--r-- | clang/lib/CodeGen/CodeGenModule.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp index 775f500fdb1..f2dda5d658f 100644 --- a/clang/lib/CodeGen/CodeGenModule.cpp +++ b/clang/lib/CodeGen/CodeGenModule.cpp @@ -523,6 +523,10 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, !F->hasFnAttr(llvm::Attribute::NoInline)) F->addFnAttr(llvm::Attribute::AlwaysInline); + // FIXME: Communicate hot and cold attributes to LLVM more directly. + if (D->hasAttr<ColdAttr>()) + F->addFnAttr(llvm::Attribute::OptimizeForSize); + if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) F->setUnnamedAddr(true); |
