Remove explicit control flow through the use of the 'not' script

llvm-svn: 6965
diff --git a/llvm/test/Regression/Transforms/GlobalDCE/basicvariabletest.ll b/llvm/test/Regression/Transforms/GlobalDCE/basicvariabletest.ll
index a3d65c7..1f5c61b 100644
--- a/llvm/test/Regression/Transforms/GlobalDCE/basicvariabletest.ll
+++ b/llvm/test/Regression/Transforms/GlobalDCE/basicvariabletest.ll
@@ -1,8 +1,4 @@
-; RUN: if as < %s | opt -globaldce | dis | grep global
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
-
+; RUN: as < %s | opt -globaldce | dis | not grep global
 
 %X = uninitialized global int
 %Y = internal global int 7