diff --git a/test/Analysis/BasicAA/cas.ll b/test/Analysis/BasicAA/cas.ll
index 87772bf..4ce7811 100644
--- a/test/Analysis/BasicAA/cas.ll
+++ b/test/Analysis/BasicAA/cas.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -basicaa -gvn -S | grep load | count 1
+; RUN: opt < %s -basicaa -gvn -instcombine -S | grep {ret i32 0}
 
 @flag0 = internal global i32 zeroinitializer
 @turn = internal global i32 zeroinitializer
@@ -6,9 +6,10 @@
 
 define i32 @main() {
   %a = load i32* @flag0
-	%b = tail call i32 @llvm.atomic.swap.i32.p0i32(i32* @turn, i32 1)
+  %b = tail call i32 @llvm.atomic.swap.i32.p0i32(i32* @turn, i32 1)
   %c = load i32* @flag0
-	ret i32 %c
+  %d = sub i32 %a, %c
+  ret i32 %d
 }
 
 declare i32 @llvm.atomic.swap.i32.p0i32(i32*, i32) nounwind
\ No newline at end of file