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

2 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 593db2b901c..694121545ad 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -74,6 +74,9 @@ TargetInfo::TargetInfo(const std::string &T) : Triple(T) {
   // Default to no types using fpret.
   RealTypeUsesObjCFPRet = 0;
 
+  // Default to not using fp2ret for __Complex long double
+  ComplexLongDoubleUsesFP2Ret = false;
+
   // Default to using the Itanium ABI.
   CXXABI = CXXABI_Itanium;
 
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 60642b383a9..da32c93254d 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -2245,6 +2245,9 @@ public:
     // Use fpret only for long double.
     RealTypeUsesObjCFPRet = (1 << TargetInfo::LongDouble);
 
+    // Use fp2ret for _Complex long double.
+    ComplexLongDoubleUsesFP2Ret = true;
+
     // x86-64 has atomics up to 16 bytes.
     // FIXME: Once the backend is fixed, increase MaxAtomicInlineWidth to 128
     // on CPUs with cmpxchg16b