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Emit the 'alignstack' LLVM function attribute when we encounter a function

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marked 'force_align_arg_pointer'. Almost there; now all I need to do is finish
up the backend.

llvm-svn: 96100
This commit is contained in:
Charles Davis
2010-02-13 15:54:06 +00:00
parent a932bbca75
commit 4ea31ab369
2 changed files with 25 additions and 0 deletions
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17
clang/lib/CodeGen/TargetInfo.cpp
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@@ -325,6 +325,9 @@ class X86_32TargetCodeGenInfo : public TargetCodeGenInfo {
public:
X86_32TargetCodeGenInfo(ASTContext &Context, bool d, bool p)
:TargetCodeGenInfo(new X86_32ABIInfo(Context, d, p)) {}
void SetTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
CodeGen::CodeGenModule &CGM) const;
};
}
@@ -551,6 +554,20 @@ llvm::Value *X86_32ABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
return AddrTyped;
}
void X86_32TargetCodeGenInfo::SetTargetAttributes(const Decl *D,
llvm::GlobalValue *GV,
CodeGen::CodeGenModule &CGM) const {
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
if (FD->hasAttr<X86ForceAlignArgPointerAttr>()) {
// Get the LLVM function.
llvm::Function *Fn = cast<llvm::Function>(GV);
// Now add the 'alignstack' attribute with a value of 16.
Fn->addFnAttr(llvm::Attribute::constructStackAlignmentFromInt(16));
}
}
}
namespace {
/// X86_64ABIInfo - The X86_64 ABI information.
class X86_64ABIInfo : public ABIInfo {