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Implement the 'optnone' attribute, which suppresses most optimizations

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on a function.

llvm-svn: 205255
This commit is contained in:
Paul Robinson
2014-03-31 22:29:15 +00:00
parent e117992f00
commit f067435026
7 changed files with 129 additions and 1 deletions
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10
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -660,6 +660,10 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
// Naked implies noinline: we should not be inlining such functions.
B.addAttribute(llvm::Attribute::Naked);
B.addAttribute(llvm::Attribute::NoInline);
} else if (D->hasAttr<OptimizeNoneAttr>()) {
// OptimizeNone implies noinline; we should not be inlining such functions.
B.addAttribute(llvm::Attribute::OptimizeNone);
B.addAttribute(llvm::Attribute::NoInline);
} else if (D->hasAttr<NoDuplicateAttr>()) {
B.addAttribute(llvm::Attribute::NoDuplicate);
} else if (D->hasAttr<NoInlineAttr>()) {
@@ -679,6 +683,12 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
if (D->hasAttr<MinSizeAttr>())
B.addAttribute(llvm::Attribute::MinSize);
if (D->hasAttr<OptimizeNoneAttr>()) {
// OptimizeNone wins over OptimizeForSize and MinSize.
B.removeAttribute(llvm::Attribute::OptimizeForSize);
B.removeAttribute(llvm::Attribute::MinSize);
}
if (LangOpts.getStackProtector() == LangOptions::SSPOn)
B.addAttribute(llvm::Attribute::StackProtect);
else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)