Eliminate explicit control flow in tests

llvm-svn: 6961
diff --git a/llvm/test/Regression/Transforms/SimplifyCFG/EqualPHIEdgeBlockMerge.ll b/llvm/test/Regression/Transforms/SimplifyCFG/EqualPHIEdgeBlockMerge.ll
index b090e78..1a31ee4 100644
--- a/llvm/test/Regression/Transforms/SimplifyCFG/EqualPHIEdgeBlockMerge.ll
+++ b/llvm/test/Regression/Transforms/SimplifyCFG/EqualPHIEdgeBlockMerge.ll
@@ -1,9 +1,6 @@
 ; Test merging of blocks with phi nodes.
 ;
-; RUN: if as < %s | opt -simplifycfg | dis | grep 'N:'
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
+; RUN: as < %s | opt -simplifycfg | dis | not grep 'N:'
 ;
 
 int %test(bool %a) {