diff options
| 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 | ee409a916e9b97ed6bc2f48d8d6aac6b8b773d7b (patch) | |
| tree | 12e368032b763331926a01290bffec6c87598e30 /lib/CodeGen/CodeGenModule.cpp | |
| parent | 2283b4664b004aae034b08f305ad2bc1dff9868e (diff) | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156723 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CodeGenModule.cpp')
| -rw-r--r-- | lib/CodeGen/CodeGenModule.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp index 775f500fdb..f2dda5d658 100644 --- a/lib/CodeGen/CodeGenModule.cpp +++ b/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); |