Make CallExpr::isBuiltinConstantExpr slightly more efficient.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46594 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/Expr.cpp b/AST/Expr.cpp
index 88c1b23..f02e817 100644
--- a/AST/Expr.cpp
+++ b/AST/Expr.cpp
@@ -130,9 +130,16 @@
if (!DRE)
return false;
- // We have a DeclRefExpr.
- if (strcmp(DRE->getDecl()->getName(),
- "__builtin___CFStringMakeConstantString") == 0)
+ const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
+ if (!FDecl)
+ return false;
+
+ unsigned builtinID = FDecl->getIdentifier()->getBuiltinID();
+ if (!builtinID)
+ return false;
+
+ // We have a builtin that is a constant expression
+ if (builtinID == Builtin::BI__builtin___CFStringMakeConstantString)
return true;
return false;
}