convert to -verify mode.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100674 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/expr_usual_conversions.c b/test/Preprocessor/expr_usual_conversions.c
index b1bddd3..5ca2cb8 100644
--- a/test/Preprocessor/expr_usual_conversions.c
+++ b/test/Preprocessor/expr_usual_conversions.c
@@ -1,8 +1,9 @@
-// RUN: %clang_cc1 %s -E  2>&1 | grep warning | wc -l | grep 2
+// RUN: %clang_cc1 %s -E -verify
 
 #define INTMAX_MIN (-9223372036854775807LL -1)
 
-#if (-42 + 0U) / -2
+#if (-42 + 0U) /* expected-warning {{left side of operator converted from negative value to unsigned: -42 to 18446744073709551574}} */  \
+  / -2         /* expected-warning {{right side of operator converted from negative value to unsigned: -2 to 18446744073709551614}} */
 foo
 #endif