Fixed diff comparison.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160076 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Bitcode/2012-05-07-SwitchInstRangesSupport.ll b/test/Bitcode/2012-05-07-SwitchInstRangesSupport.ll
index 4f51ba8..583b9a8 100644
--- a/test/Bitcode/2012-05-07-SwitchInstRangesSupport.ll
+++ b/test/Bitcode/2012-05-07-SwitchInstRangesSupport.ll
@@ -6,7 +6,7 @@
 ; RUN: llvm-dis %t.bc -o - | tail -n +2 > %t.ll
 ; RUN: llvm-as %t.ll -o %t2.bc
 ; RUN: llvm-dis %t2.bc -o - | tail -n +2 > %t2.ll
-; RUN: diff %t.ll %t2.ll | not grep .*
+; RUN: llvm-diff %t.ll %t2.ll
 
 define void @test() {
   %mem = alloca i32