diff --git a/test/CodeGen/X86/fast-isel-fneg.ll b/test/CodeGen/X86/fast-isel-fneg.ll
index 99c728a..0c2ce6d 100644
--- a/test/CodeGen/X86/fast-isel-fneg.ll
+++ b/test/CodeGen/X86/fast-isel-fneg.ll
@@ -1,20 +1,50 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -fast-isel -fast-isel-abort=1 -mtriple=x86_64-apple-darwin10 | FileCheck %s
 ; RUN: llc < %s -fast-isel -mtriple=i686-- -mattr=+sse2 | FileCheck --check-prefix=SSE2 %s
 
-; SSE2: xor
-; SSE2: xor
-; SSE2-NOT: xor
-
-; CHECK-LABEL: doo:
-; CHECK: xor
 define double @doo(double %x) nounwind {
+; CHECK-LABEL: doo:
+; CHECK:       ## %bb.0:
+; CHECK-NEXT:    movq %xmm0, %rax
+; CHECK-NEXT:    movabsq $-9223372036854775808, %rcx ## imm = 0x8000000000000000
+; CHECK-NEXT:    xorq %rax, %rcx
+; CHECK-NEXT:    movq %rcx, %xmm0
+; CHECK-NEXT:    retq
+;
+; SSE2-LABEL: doo:
+; SSE2:       # %bb.0:
+; SSE2-NEXT:    pushl %ebp
+; SSE2-NEXT:    movl %esp, %ebp
+; SSE2-NEXT:    andl $-8, %esp
+; SSE2-NEXT:    subl $8, %esp
+; SSE2-NEXT:    movsd {{.*#+}} xmm0 = mem[0],zero
+; SSE2-NEXT:    xorps {{\.LCPI.*}}, %xmm0
+; SSE2-NEXT:    movlps %xmm0, (%esp)
+; SSE2-NEXT:    fldl (%esp)
+; SSE2-NEXT:    movl %ebp, %esp
+; SSE2-NEXT:    popl %ebp
+; SSE2-NEXT:    retl
   %y = fsub double -0.0, %x
   ret double %y
 }
 
-; CHECK-LABEL: foo:
-; CHECK: xor
 define float @foo(float %x) nounwind {
+; CHECK-LABEL: foo:
+; CHECK:       ## %bb.0:
+; CHECK-NEXT:    movd %xmm0, %eax
+; CHECK-NEXT:    xorl $2147483648, %eax ## imm = 0x80000000
+; CHECK-NEXT:    movd %eax, %xmm0
+; CHECK-NEXT:    retq
+;
+; SSE2-LABEL: foo:
+; SSE2:       # %bb.0:
+; SSE2-NEXT:    pushl %eax
+; SSE2-NEXT:    movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; SSE2-NEXT:    xorps {{\.LCPI.*}}, %xmm0
+; SSE2-NEXT:    movss %xmm0, (%esp)
+; SSE2-NEXT:    flds (%esp)
+; SSE2-NEXT:    popl %eax
+; SSE2-NEXT:    retl
   %y = fsub float -0.0, %x
   ret float %y
 }