CodeGen: Unify two implementations of canDevirtualizeMemberFunctionCall.

They were mostly copy&paste of each other, move it to CodeGenFunction. Of course
the two implementations have diverged over time; the one in CGExprCXX seems to
be the more modern one so I picked that one and moved it to CGClass which feels
like a better home for it. No intended functionality change.

llvm-svn: 189203

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index f8dcfa3..ff7b700 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -1196,6 +1196,12 @@ public:
   /// to by This.
   llvm::Value *GetVTablePtr(llvm::Value *This, llvm::Type *Ty);
 
+
+  /// CanDevirtualizeMemberFunctionCalls - Checks whether virtual calls on given
+  /// expr can be devirtualized.
+  bool CanDevirtualizeMemberFunctionCall(const Expr *Base,
+                                         const CXXMethodDecl *MD);
+
   /// EnterDtorCleanups - Enter the cleanups necessary to complete the
   /// given phase of destruction for a destructor.  The end result
   /// should call destructors on members and base classes in reverse