Abstract out parts of thunk emission code, add support for simple thunks when using -cxx-abi microsoft

Reviewed at http://llvm-reviews.chandlerc.com/D1787

llvm-svn: 192220

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/MicrosoftCXXABI.cpp b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
index 1d73b213b7d..7452c860d0b 100644
--- a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -173,8 +173,20 @@ public:
                                  CXXDtorType DtorType, SourceLocation CallLoc,
                                  llvm::Value *This);
 
+  void adjustCallArgsForDestructorThunk(CodeGenFunction &CGF, GlobalDecl GD,
+                                        CallArgList &CallArgs) {
+    assert(GD.getDtorType() == Dtor_Deleting &&
+           "Only deleting destructor thunks are available in this ABI");
+    CallArgs.add(RValue::get(getStructorImplicitParamValue(CGF)),
+                             CGM.getContext().IntTy);
+  }
+
   void emitVirtualInheritanceTables(const CXXRecordDecl *RD);
 
+  void setThunkLinkage(llvm::Function *Thunk, bool ForVTable) {
+    Thunk->setLinkage(llvm::GlobalValue::WeakAnyLinkage);
+  }
+
   void EmitGuardedInit(CodeGenFunction &CGF, const VarDecl &D,
                        llvm::GlobalVariable *DeclPtr,
                        bool PerformInit);