diff --git a/test/CodeGen/X86/2003-08-03-CallArgLiveRanges.ll b/test/CodeGen/X86/2003-08-03-CallArgLiveRanges.ll
index 2e4cb1fe7ed..cb90bf644d5 100644
--- a/test/CodeGen/X86/2003-08-03-CallArgLiveRanges.ll
+++ b/test/CodeGen/X86/2003-08-03-CallArgLiveRanges.ll
@@ -4,7 +4,9 @@
 ; it makes a ton of annoying overlapping live ranges.  This code should not
 ; cause spills!
 ;
-; RUN: llc < %s -march=x86 -stats 2>&1 | not grep spilled
+; RUN: llc < %s -march=x86 -stats 2>&1 | FileCheck %s
+
+; CHECK-NOT: spilled
 
 target datalayout = "e-p:32:32"
 
diff --git a/test/CodeGen/X86/2006-11-27-SelectLegalize.ll b/test/CodeGen/X86/2006-11-27-SelectLegalize.ll
index ea2e6db61e1..ba83a8db839 100644
--- a/test/CodeGen/X86/2006-11-27-SelectLegalize.ll
+++ b/test/CodeGen/X86/2006-11-27-SelectLegalize.ll
@@ -1,6 +1,8 @@
-; RUN: llc < %s -march=x86 | grep test.*1
+; RUN: llc < %s -march=x86 | FileCheck %s
 ; PR1016
 
+; CHECK: {{test.*1}}
+
 define i32 @test(i32 %A, i32 %B, i32 %C) {
         %a = trunc i32 %A to i1         ; <i1> [#uses=1]
         %D = select i1 %a, i32 %B, i32 %C               ; <i32> [#uses=1]
diff --git a/test/CodeGen/X86/2007-04-24-Huge-Stack.ll b/test/CodeGen/X86/2007-04-24-Huge-Stack.ll
index 7528129971a..648718cc722 100644
--- a/test/CodeGen/X86/2007-04-24-Huge-Stack.ll
+++ b/test/CodeGen/X86/2007-04-24-Huge-Stack.ll
@@ -1,6 +1,8 @@
-; RUN: llc < %s -march=x86-64 | not grep 4294967112
+; RUN: llc < %s -march=x86-64 | FileCheck %s
 ; PR1348
 
+; CHECK-NOT: 4294967112
+
 	%struct.md5_ctx = type { i32, i32, i32, i32, [2 x i32], i32, [128 x i8], [4294967288 x i8] }
 
 define i8* @md5_buffer(i8* %buffer, i64 %len, i8* %resblock) {
diff --git a/test/CodeGen/X86/2007-06-15-IntToMMX.ll b/test/CodeGen/X86/2007-06-15-IntToMMX.ll
index 660d4fe7b19..5612d9eb282 100644
--- a/test/CodeGen/X86/2007-06-15-IntToMMX.ll
+++ b/test/CodeGen/X86/2007-06-15-IntToMMX.ll
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=x86-64 -mattr=+mmx | grep paddusw
+; RUN: llc < %s -march=x86-64 -mattr=+mmx | FileCheck %s
+
+; CHECK: paddusw
+
 @R = external global x86_mmx          ; <x86_mmx*> [#uses=1]
 
 define void @foo(<1 x i64> %A, <1 x i64> %B) {
diff --git a/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll b/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll
index 62624a7e344..4f7ae327d1f 100644
--- a/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll
+++ b/test/CodeGen/X86/2007-08-01-LiveVariablesBug.ll
@@ -1,4 +1,6 @@
-; RUN: llc < %s -march=x86 | not grep movl
+; RUN: llc < %s -march=x86 | FileCheck %s
+
+; CHECK-NOT: movl
 
 define zeroext i8 @t(i8 zeroext  %x, i8 zeroext  %y)   {
 	%tmp2 = add i8 %x, 2
diff --git a/test/CodeGen/X86/2008-01-09-LongDoubleSin.ll b/test/CodeGen/X86/2008-01-09-LongDoubleSin.ll
index 6997d535ff9..e8c957b1ff6 100644
--- a/test/CodeGen/X86/2008-01-09-LongDoubleSin.ll
+++ b/test/CodeGen/X86/2008-01-09-LongDoubleSin.ll
@@ -1,4 +1,6 @@
-; RUN: llc < %s -o - | grep sinl
+; RUN: llc < %s -o - | FileCheck %s
+
+; CHECK: sinl
 
 target triple = "i686-pc-linux-gnu"
 
diff --git a/test/CodeGen/X86/2009-02-25-CommuteBug.ll b/test/CodeGen/X86/2009-02-25-CommuteBug.ll
index 9ea34e27a17..5bec179534b 100644
--- a/test/CodeGen/X86/2009-02-25-CommuteBug.ll
+++ b/test/CodeGen/X86/2009-02-25-CommuteBug.ll
@@ -1,7 +1,9 @@
 ; REQUIRES: asserts
-; RUN: llc < %s -march=x86 -mattr=+sse2 -stats 2>&1 | not grep commuted
+; RUN: llc < %s -march=x86 -mattr=+sse2 -stats 2>&1 | FileCheck %s
 ; rdar://6608609
 
+; CHECK-NOT: commuted
+
 define <2 x double> @t(<2 x double> %A, <2 x double> %B, <2 x double> %C) nounwind readnone {
 entry:
 	%tmp.i2 = bitcast <2 x double> %B to <2 x i64>		; <<2 x i64>> [#uses=1]
diff --git a/test/CodeGen/X86/2009-04-16-SpillerUnfold.ll b/test/CodeGen/X86/2009-04-16-SpillerUnfold.ll
index 0607eda271a..679a65d93d0 100644
--- a/test/CodeGen/X86/2009-04-16-SpillerUnfold.ll
+++ b/test/CodeGen/X86/2009-04-16-SpillerUnfold.ll
@@ -1,8 +1,10 @@
 ; REQUIRES: asserts
-; RUN: llc < %s -mtriple=x86_64-apple-darwin10.0 -relocation-model=pic -disable-fp-elim -stats 2>&1 | grep "Number of modref unfolded"
+; RUN: llc < %s -mtriple=x86_64-apple-darwin10.0 -relocation-model=pic -disable-fp-elim -stats 2>&1 | FileCheck %s
 ; XFAIL: *
 ; 69408 removed the opportunity for this optimization to work
 
+; CHECK: {{Number of modref unfolded}}
+
 	%struct.SHA512_CTX = type { [8 x i64], i64, i64, %struct.anon, i32, i32 }
 	%struct.anon = type { [16 x i64] }
 @K512 = external constant [80 x i64], align 32		; <[80 x i64]*> [#uses=2]
diff --git a/test/CodeGen/X86/2009-04-24.ll b/test/CodeGen/X86/2009-04-24.ll
index 08bf9e3f9f3..d104c875760 100644
--- a/test/CodeGen/X86/2009-04-24.ll
+++ b/test/CodeGen/X86/2009-04-24.ll
@@ -1,8 +1,9 @@
-; RUN: llc < %s -march=x86-64 -mtriple=x86_64-linux-gnu -regalloc=fast -optimize-regalloc=0 -relocation-model=pic > %t2
-; RUN: grep "leaq.*TLSGD" %t2
-; RUN: grep "__tls_get_addr" %t2
+; RUN: llc < %s -march=x86-64 -mtriple=x86_64-linux-gnu -regalloc=fast -optimize-regalloc=0 -relocation-model=pic | FileCheck %s
 ; PR4004
 
+; CHECK: {{leaq.*TLSGD}}
+; CHECK: {{__tls_get_addr}}
+
 @i = thread_local global i32 15
 
 define i32 @f() {
diff --git a/test/CodeGen/X86/bswap-inline-asm.ll b/test/CodeGen/X86/bswap-inline-asm.ll
index 3bb9124633d..d69bfa6e7eb 100644
--- a/test/CodeGen/X86/bswap-inline-asm.ll
+++ b/test/CodeGen/X86/bswap-inline-asm.ll
@@ -1,6 +1,7 @@
-; RUN: llc < %s -mtriple=x86_64-apple-darwin > %t
-; RUN: not grep InlineAsm %t
-; RUN: FileCheck %s < %t
+; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck -check-prefix CHK %s
+; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
+
+; CHK-NOT: InlineAsm
 
 ; CHECK: foo:
 ; CHECK: bswapq
diff --git a/test/CodeGen/X86/long-setcc.ll b/test/CodeGen/X86/long-setcc.ll
index e0165fb01b5..13046d8b3de 100644
--- a/test/CodeGen/X86/long-setcc.ll
+++ b/test/CodeGen/X86/long-setcc.ll
@@ -1,18 +1,31 @@
-; RUN: llc < %s -march=x86 | grep cmp | count 1
-; RUN: llc < %s -march=x86 | grep shr | count 1
-; RUN: llc < %s -march=x86 | grep xor | count 1
+; RUN: llc < %s -march=x86 | FileCheck %s
 
 define i1 @t1(i64 %x) nounwind {
 	%B = icmp slt i64 %x, 0
 	ret i1 %B
 }
 
+; CHECK: t1
+; CHECK: shrl
+; CHECK-NOT: shrl
+; CHECK: ret
+
 define i1 @t2(i64 %x) nounwind {
 	%tmp = icmp ult i64 %x, 4294967296
 	ret i1 %tmp
 }
 
+; CHECK: t2
+; CHECK: cmp
+; CHECK-NOT: cmp
+; CHECK: ret
+
 define i1 @t3(i32 %x) nounwind {
 	%tmp = icmp ugt i32 %x, -1
 	ret i1 %tmp
 }
+
+; CHECK: t3
+; CHECK: xor
+; CHECK-NOT: xor
+; CHECK: ret
diff --git a/test/CodeGen/X86/lsr-normalization.ll b/test/CodeGen/X86/lsr-normalization.ll
index 932141d0448..bbf8f010efd 100644
--- a/test/CodeGen/X86/lsr-normalization.ll
+++ b/test/CodeGen/X86/lsr-normalization.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=x86-64 | grep div | count 1
+; RUN: llc < %s -march=x86-64 | FileCheck %s
 ; rdar://8168938
 
 ; This testcase involves SCEV normalization with the exit value from
@@ -6,6 +6,9 @@
 ; loop. The expression should be properly normalized and simplified,
 ; and require only a single division.
 
+; CHECK: div
+; CHECK-NOT: div
+
 %0 = type { %0*, %0* }
 
 @0 = private constant [13 x i8] c"Result: %lu\0A\00" ; <[13 x i8]*> [#uses=1]
diff --git a/test/CodeGen/X86/mul-legalize.ll b/test/CodeGen/X86/mul-legalize.ll
index 069737d4d10..339de310433 100644
--- a/test/CodeGen/X86/mul-legalize.ll
+++ b/test/CodeGen/X86/mul-legalize.ll
@@ -1,6 +1,8 @@
-; RUN: llc < %s -march=x86 | grep 24576
+; RUN: llc < %s -march=x86 | FileCheck %s
 ; PR2135
 
+; CHECK: 24576
+
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
 target triple = "i386-pc-linux-gnu"
 @.str = constant [13 x i8] c"c45531m.adb\00\00"		
diff --git a/test/CodeGen/X86/negative_zero.ll b/test/CodeGen/X86/negative_zero.ll
index 29474c21f24..c8c2cd753e0 100644
--- a/test/CodeGen/X86/negative_zero.ll
+++ b/test/CodeGen/X86/negative_zero.ll
@@ -1,4 +1,6 @@
-; RUN: llc < %s -march=x86 -mattr=-sse2,-sse3 | grep fchs
+; RUN: llc < %s -march=x86 -mattr=-sse2,-sse3 | FileCheck %s
+
+; CHECK: fchs
 
 
 define double @T() {
diff --git a/test/CodeGen/X86/optimize-max-2.ll b/test/CodeGen/X86/optimize-max-2.ll
index 8851c5b1a30..ce0843e4252 100644
--- a/test/CodeGen/X86/optimize-max-2.ll
+++ b/test/CodeGen/X86/optimize-max-2.ll
@@ -1,6 +1,8 @@
-; RUN: llc < %s -march=x86-64 > %t
-; RUN: grep cmov %t | count 2
-; RUN: grep jne %t | count 1
+; RUN: llc < %s -march=x86-64 | grep cmov %t | count 2
+; RUN: llc < %s -march=x86-64 | FileCheck %s
+
+; CHECK: jne
+; CHECK-NOT: jne
 
 ; LSR's OptimizeMax function shouldn't try to eliminate this max, because
 ; it has three operands.
diff --git a/test/CodeGen/X86/phys_subreg_coalesce.ll b/test/CodeGen/X86/phys_subreg_coalesce.ll
index 2c855ce8da6..8b2f61e1e2d 100644
--- a/test/CodeGen/X86/phys_subreg_coalesce.ll
+++ b/test/CodeGen/X86/phys_subreg_coalesce.ll
@@ -1,4 +1,6 @@
-; RUN: llc < %s -mtriple=x86_64-apple-darwin9 -mattr=+sse2 | not grep movl
+; RUN: llc < %s -mtriple=x86_64-apple-darwin9 -mattr=+sse2 | FileCheck %s
+
+; CHECK-NOT: movl
 
 	%struct.dpoint = type { double, double }
 
diff --git a/test/CodeGen/X86/vec_set-D.ll b/test/CodeGen/X86/vec_set-D.ll
index 3d6369e1c76..9c1e1acf0ba 100644
--- a/test/CodeGen/X86/vec_set-D.ll
+++ b/test/CodeGen/X86/vec_set-D.ll
@@ -1,4 +1,6 @@
-; RUN: llc < %s -march=x86 -mattr=+sse2 | grep movq
+; RUN: llc < %s -march=x86 -mattr=+sse2 | FileCheck %s
+
+; CHECK: movq
 
 define <4 x i32> @t(i32 %x, i32 %y) nounwind  {
 	%tmp1 = insertelement <4 x i32> zeroinitializer, i32 %x, i32 0
diff --git a/test/CodeGen/X86/vec_set-I.ll b/test/CodeGen/X86/vec_set-I.ll
index 64f36f99e4d..c5d6ab88a35 100644
--- a/test/CodeGen/X86/vec_set-I.ll
+++ b/test/CodeGen/X86/vec_set-I.ll
@@ -1,5 +1,8 @@
-; RUN: llc < %s -march=x86 -mattr=+sse2 | grep movd
-; RUN: llc < %s -march=x86 -mattr=+sse2 | not grep xorp
+; RUN: llc < %s -march=x86 -mattr=+sse2 | FileCheck %s
+
+; CHECK-NOT: xorp
+; CHECK: movd
+; CHECK-NOT: xorp
 
 define void @t1() nounwind  {
 	%tmp298.i.i = load <4 x float>* null, align 16
diff --git a/test/CodeGen/X86/x86-64-shortint.ll b/test/CodeGen/X86/x86-64-shortint.ll
index cbf658888ce..75f89023509 100644
--- a/test/CodeGen/X86/x86-64-shortint.ll
+++ b/test/CodeGen/X86/x86-64-shortint.ll
@@ -1,4 +1,6 @@
-; RUN: llc < %s | grep movswl
+; RUN: llc < %s | FileCheck %s
+
+; CHECK: movswl
 
 target datalayout = "e-p:64:64"
 target triple = "x86_64-apple-darwin8"