Set SRet flags properly in '-cxx-abi microsoft'.

Also,
- abstract out the indirect/in memory/in registers decisions into the CGCXXABI
- fix handling of empty struct arguments for '-cxx-abi microsoft'
- add/fix tests



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179681 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/CodeGen/MicrosoftCXXABI.cpp b/lib/CodeGen/MicrosoftCXXABI.cpp
index a0e4f4d384..92bc538f20 100644
--- a/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -28,6 +28,17 @@ class MicrosoftCXXABI : public CGCXXABI {
 public:
   MicrosoftCXXABI(CodeGenModule &CGM) : CGCXXABI(CGM) {}
 
+  bool isReturnTypeIndirect(const CXXRecordDecl *RD) const {
+    // Structures that are not C++03 PODs are always indirect.
+    return !RD->isPOD();
+  }
+
+  RecordArgABI getRecordArgABI(const CXXRecordDecl *RD) const {
+    if (RD->hasNonTrivialCopyConstructor())
+      return RAA_DirectInMemory;
+    return RAA_Default;
+  }
+
   StringRef GetPureVirtualCallName() { return "_purecall"; }
   // No known support for deleted functions in MSVC yet, so this choice is
   // arbitrary.