Use function pointers, rather than references, to pass Destroyers
around, in the process cleaning up the various gcc/msvc compiler
workarounds.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149036 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index 581d463..446bef1 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -1047,13 +1047,13 @@
   private:
     llvm::Value *addr;
     const ObjCIvarDecl *ivar;
-    CodeGenFunction::Destroyer &destroyer;
+    CodeGenFunction::Destroyer *destroyer;
     bool useEHCleanupForArray;
   public:
     DestroyIvar(llvm::Value *addr, const ObjCIvarDecl *ivar,
                 CodeGenFunction::Destroyer *destroyer,
                 bool useEHCleanupForArray)
-      : addr(addr), ivar(ivar), destroyer(*destroyer),
+      : addr(addr), ivar(ivar), destroyer(destroyer),
         useEHCleanupForArray(useEHCleanupForArray) {}
 
     void Emit(CodeGenFunction &CGF, Flags flags) {
@@ -1093,11 +1093,11 @@
     // Use a call to objc_storeStrong to destroy strong ivars, for the
     // general benefit of the tools.
     if (dtorKind == QualType::DK_objc_strong_lifetime) {
-      destroyer = &destroyARCStrongWithStore;
+      destroyer = destroyARCStrongWithStore;
 
     // Otherwise use the default for the destruction kind.
     } else {
-      destroyer = &CGF.getDestroyer(dtorKind);
+      destroyer = CGF.getDestroyer(dtorKind);
     }
 
     CleanupKind cleanupKind = CGF.getCleanupKind(dtorKind);