Don't pass -O0 to clang_cc1, it is the default.

llvm-svn: 189910
diff --git a/clang/test/CodeGenCXX/init-invariant.cpp b/clang/test/CodeGenCXX/init-invariant.cpp
index 2f56e82..45816b2 100644
--- a/clang/test/CodeGenCXX/init-invariant.cpp
+++ b/clang/test/CodeGenCXX/init-invariant.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple i686-linux-gnu -emit-llvm %s -O0 -o - | FileCheck %s --check-prefix=CHECK-O0
+// RUN: %clang_cc1 -triple i686-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK-O0
 // RUN: %clang_cc1 -triple i686-linux-gnu -emit-llvm %s -O1 -o - | FileCheck %s
 
 // Check that we add an llvm.invariant.start to mark when a global becomes