Make Sema::CheckForConstantInitializer use Expr::Evaluate. This fixes PR3130.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60580 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/constant-builtins.c b/test/Sema/constant-builtins.c
index d6cf457..b1c5e2a 100644
--- a/test/Sema/constant-builtins.c
+++ b/test/Sema/constant-builtins.c
@@ -19,5 +19,6 @@
 
 short somefunc();
 
-short t = __builtin_constant_p(5353) ? 42 : somefunc(); // expected-warning {{expression is not a constant, but is accepted as one by GNU extensions}}
+short t = __builtin_constant_p(5353) ? 42 : somefunc();
+