Rewrite test/Integer tests to use FileCheck instead of grep

llvm-svn: 179047
diff --git a/llvm/test/Integer/2007-01-19-TruncSext.ll b/llvm/test/Integer/2007-01-19-TruncSext.ll
index 3fee6bc..e6d89dd 100644
--- a/llvm/test/Integer/2007-01-19-TruncSext.ll
+++ b/llvm/test/Integer/2007-01-19-TruncSext.ll
@@ -1,7 +1,8 @@
 ; RUN: llvm-as %s -o - | llvm-dis > %t1.ll
 ; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
 ; RUN: diff %t1.ll %t2.ll
-; RUN: llvm-as < %s | lli --force-interpreter=true | grep -- -255
+; RUN: llvm-as < %s | lli --force-interpreter=true | FileCheck %s
+; CHECK: -255
 
 @ARRAY   = global [ 20 x i17 ] zeroinitializer
 @FORMAT  = constant [ 4 x i8 ] c"%d\0A\00"