In x86_64, when calling an Objective-C method that returns a _Complex long double, make sure to use the objc_msgSend_fp2ret function which ensures that the return value will be {0, 0} if the receiver is nil.

llvm-svn: 143350

1 files changed, 11 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index f9eaedab18f..6e3b70cef85 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -611,6 +611,17 @@ bool CodeGenModule::ReturnTypeUsesFPRet(QualType ResultType) {
   return false;
 }
 
+bool CodeGenModule::ReturnTypeUsesFP2Ret(QualType ResultType) {
+  if (const ComplexType *CT = ResultType->getAs<ComplexType>()) {
+    if (const BuiltinType *BT = CT->getElementType()->getAs<BuiltinType>()) {
+      if (BT->getKind() == BuiltinType::LongDouble)
+        return getContext().getTargetInfo().useObjCFP2RetForComplexLongDouble();
+    }
+  }
+
+  return false;
+}
+
 llvm::FunctionType *CodeGenTypes::GetFunctionType(GlobalDecl GD) {
   const CGFunctionInfo &FI = getFunctionInfo(GD);