implement codegen support for __builtin_types_compatible_p


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40788 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index 3235034..4c79498 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -48,6 +48,8 @@
   class IntegerLiteral;
   class FloatingLiteral;
   class CharacterLiteral;
+  class TypesCompatibleExpr;
+  
   class CastExpr;
   class CallExpr;
   class UnaryOperator;
@@ -351,6 +353,7 @@
   RValue EmitIntegerLiteral(const IntegerLiteral *E);
   RValue EmitFloatingLiteral(const FloatingLiteral *E);
   RValue EmitCharacterLiteral(const CharacterLiteral *E);
+  RValue EmitTypesCompatibleExpr(const TypesCompatibleExpr *E);
    
   RValue EmitCastExpr(const Expr *Op, QualType DestTy);
   RValue EmitCallExpr(const CallExpr *E);