Use opt -S instead of piping bitcode output through llvm-dis.

llvm-svn: 81257
diff --git a/llvm/test/Transforms/ConstProp/div-zero.ll b/llvm/test/Transforms/ConstProp/div-zero.ll
index 74c7449..e96061d 100644
--- a/llvm/test/Transforms/ConstProp/div-zero.ll
+++ b/llvm/test/Transforms/ConstProp/div-zero.ll
@@ -1,4 +1,4 @@
-; RUN: opt %s -instcombine | llvm-dis | grep {ret i32 0}
+; RUN: opt %s -instcombine -S | grep {ret i32 0}
 ; PR4424
 declare void @ext()