Emit the 'alignstack' LLVM function attribute when we encounter a function
marked 'force_align_arg_pointer'. Almost there; now all I need to do is finish
up the backend.
llvm-svn: 96100
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 6f650fc..a3d76c6 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -325,6 +325,9 @@
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 @@
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 {