Remove the TypesCompatibleExprClass AST node. Merge its functionality into BinaryTypeTraitExpr.

llvm-svn: 121298
diff --git a/clang/lib/Parse/ParseExprCXX.cpp b/clang/lib/Parse/ParseExprCXX.cpp
index 9d6023e..8014dbd 100644
--- a/clang/lib/Parse/ParseExprCXX.cpp
+++ b/clang/lib/Parse/ParseExprCXX.cpp
@@ -1823,7 +1823,8 @@
 static BinaryTypeTrait BinaryTypeTraitFromTokKind(tok::TokenKind kind) {
   switch(kind) {
   default: llvm_unreachable("Not a known binary type trait");
-  case tok::kw___is_base_of:      return BTT_IsBaseOf;
+  case tok::kw___is_base_of:                 return BTT_IsBaseOf;
+  case tok::kw___builtin_types_compatible_p: return BTT_TypeCompatible;
   }
 }