Index: test/Transforms/InstCombine/not-fcmp.ll
===================================================================
--- test/Transforms/InstCombine/not-fcmp.ll
+++ test/Transforms/InstCombine/not-fcmp.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -instcombine -S | grep "fcmp uge"
+; RUN: opt < %s -instcombine -S | FileCheck %s
 ; PR1570
 
 define i1 @f(float %X, float %Y) {
@@ -6,5 +6,8 @@
         %tmp3 = fcmp olt float %X, %Y           ; <i1> [#uses=1]
         %toBoolnot5 = xor i1 %tmp3, true                ; <i1> [#uses=1]
         ret i1 %toBoolnot5
+; CHECK-LABEL: @f(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %toBoolnot5 = fcmp uge float %X, %Y
+; CHECK-NEXT: ret i1 %toBoolnot5
 }
-
Index: test/Transforms/InstCombine/not.ll
===================================================================
--- test/Transforms/InstCombine/not.ll
+++ test/Transforms/InstCombine/not.ll
@@ -1,7 +1,8 @@
 ; This test makes sure that these instructions are properly eliminated.
 ;
 
-; RUN: opt < %s -instcombine -S | not grep xor
+; RUN: opt < %s -instcombine -S | FileCheck %s
+; CHECK-NOT: xor
 
 define i32 @test1(i32 %A) {
         %B = xor i32 %A, -1             ; <i32> [#uses=1]