Index: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -11915,7 +11915,7 @@
 
   // Skip if current node is a reciprocal.
   SDValue N0 = N->getOperand(0);
-  ConstantFPSDNode *N0CFP = dyn_cast<ConstantFPSDNode>(N0);
+  ConstantFPSDNode *N0CFP = isConstOrConstSplatFP(N0, /* AllowUndefs */ true);
   if (N0CFP && N0CFP->isExactlyValue(1.0))
     return SDValue();
 
@@ -11993,6 +11993,9 @@
   if (SDValue NewSel = foldBinOpIntoSelect(N))
     return NewSel;
 
+  if (SDValue V = combineRepeatedFPDivisors(N))
+    return V;
+
   if (Options.UnsafeFPMath || Flags.hasAllowReciprocal()) {
     // fold (fdiv X, c2) -> fmul X, 1/c2 if losing precision is acceptable.
     if (N1CFP) {
@@ -12082,9 +12085,6 @@
     }
   }
 
-  if (SDValue CombineRepeatedDivisors = combineRepeatedFPDivisors(N))
-    return CombineRepeatedDivisors;
-
   return SDValue();
 }
 
Index: llvm/trunk/test/CodeGen/X86/fdiv-combine-vec.ll
===================================================================
--- llvm/trunk/test/CodeGen/X86/fdiv-combine-vec.ll
+++ llvm/trunk/test/CodeGen/X86/fdiv-combine-vec.ll
@@ -51,25 +51,17 @@
 define <4 x float> @splat_fdiv_v4f32(<4 x float> %x, float %y) {
 ; SSE-LABEL: splat_fdiv_v4f32:
 ; SSE:       # %bb.0:
-; SSE-NEXT:    shufps {{.*#+}} xmm1 = xmm1[0,0,0,0]
-; SSE-NEXT:    rcpps %xmm1, %xmm2
-; SSE-NEXT:    mulps %xmm2, %xmm1
-; SSE-NEXT:    movaps {{.*#+}} xmm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0]
-; SSE-NEXT:    subps %xmm1, %xmm3
-; SSE-NEXT:    mulps %xmm2, %xmm3
-; SSE-NEXT:    addps %xmm2, %xmm3
-; SSE-NEXT:    mulps %xmm3, %xmm0
+; SSE-NEXT:    movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; SSE-NEXT:    divss %xmm1, %xmm2
+; SSE-NEXT:    shufps {{.*#+}} xmm2 = xmm2[0,0,0,0]
+; SSE-NEXT:    mulps %xmm2, %xmm0
 ; SSE-NEXT:    retq
 ;
 ; AVX-LABEL: splat_fdiv_v4f32:
 ; AVX:       # %bb.0:
+; AVX-NEXT:    vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; AVX-NEXT:    vdivss %xmm1, %xmm2, %xmm1
 ; AVX-NEXT:    vpermilps {{.*#+}} xmm1 = xmm1[0,0,0,0]
-; AVX-NEXT:    vrcpps %xmm1, %xmm2
-; AVX-NEXT:    vmulps %xmm2, %xmm1, %xmm1
-; AVX-NEXT:    vmovaps {{.*#+}} xmm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0]
-; AVX-NEXT:    vsubps %xmm1, %xmm3, %xmm1
-; AVX-NEXT:    vmulps %xmm1, %xmm2, %xmm1
-; AVX-NEXT:    vaddps %xmm1, %xmm2, %xmm1
 ; AVX-NEXT:    vmulps %xmm1, %xmm0, %xmm0
 ; AVX-NEXT:    retq
   %vy = insertelement <4 x float> undef, float %y, i32 0
@@ -90,14 +82,10 @@
 ;
 ; AVX-LABEL: splat_fdiv_v8f32:
 ; AVX:       # %bb.0:
+; AVX-NEXT:    vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; AVX-NEXT:    vdivss %xmm1, %xmm2, %xmm1
 ; AVX-NEXT:    vpermilps {{.*#+}} xmm1 = xmm1[0,0,0,0]
 ; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm1, %ymm1
-; AVX-NEXT:    vrcpps %ymm1, %ymm2
-; AVX-NEXT:    vmulps %ymm2, %ymm1, %ymm1
-; AVX-NEXT:    vmovaps {{.*#+}} ymm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0]
-; AVX-NEXT:    vsubps %ymm1, %ymm3, %ymm1
-; AVX-NEXT:    vmulps %ymm1, %ymm2, %ymm1
-; AVX-NEXT:    vaddps %ymm1, %ymm2, %ymm1
 ; AVX-NEXT:    vmulps %ymm1, %ymm0, %ymm0
 ; AVX-NEXT:    retq
   %vy = insertelement <8 x float> undef, float %y, i32 0
@@ -109,25 +97,25 @@
 define <4 x float> @splat_fdiv_v4f32_estimate(<4 x float> %x, float %y) #0 {
 ; SSE-LABEL: splat_fdiv_v4f32_estimate:
 ; SSE:       # %bb.0:
-; SSE-NEXT:    shufps {{.*#+}} xmm1 = xmm1[0,0,0,0]
-; SSE-NEXT:    rcpps %xmm1, %xmm2
-; SSE-NEXT:    mulps %xmm2, %xmm1
-; SSE-NEXT:    movaps {{.*#+}} xmm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0]
-; SSE-NEXT:    subps %xmm1, %xmm3
-; SSE-NEXT:    mulps %xmm2, %xmm3
-; SSE-NEXT:    addps %xmm2, %xmm3
+; SSE-NEXT:    rcpss %xmm1, %xmm2
+; SSE-NEXT:    mulss %xmm2, %xmm1
+; SSE-NEXT:    movss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; SSE-NEXT:    subss %xmm1, %xmm3
+; SSE-NEXT:    mulss %xmm2, %xmm3
+; SSE-NEXT:    addss %xmm2, %xmm3
+; SSE-NEXT:    shufps {{.*#+}} xmm3 = xmm3[0,0,0,0]
 ; SSE-NEXT:    mulps %xmm3, %xmm0
 ; SSE-NEXT:    retq
 ;
 ; AVX-LABEL: splat_fdiv_v4f32_estimate:
 ; AVX:       # %bb.0:
+; AVX-NEXT:    vrcpss %xmm1, %xmm1, %xmm2
+; AVX-NEXT:    vmulss %xmm2, %xmm1, %xmm1
+; AVX-NEXT:    vmovss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; AVX-NEXT:    vsubss %xmm1, %xmm3, %xmm1
+; AVX-NEXT:    vmulss %xmm1, %xmm2, %xmm1
+; AVX-NEXT:    vaddss %xmm1, %xmm2, %xmm1
 ; AVX-NEXT:    vpermilps {{.*#+}} xmm1 = xmm1[0,0,0,0]
-; AVX-NEXT:    vrcpps %xmm1, %xmm2
-; AVX-NEXT:    vmulps %xmm2, %xmm1, %xmm1
-; AVX-NEXT:    vmovaps {{.*#+}} xmm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0]
-; AVX-NEXT:    vsubps %xmm1, %xmm3, %xmm1
-; AVX-NEXT:    vmulps %xmm1, %xmm2, %xmm1
-; AVX-NEXT:    vaddps %xmm1, %xmm2, %xmm1
 ; AVX-NEXT:    vmulps %xmm1, %xmm0, %xmm0
 ; AVX-NEXT:    retq
   %vy = insertelement <4 x float> undef, float %y, i32 0
@@ -152,14 +140,14 @@
 ;
 ; AVX-LABEL: splat_fdiv_v8f32_estimate:
 ; AVX:       # %bb.0:
+; AVX-NEXT:    vrcpss %xmm1, %xmm1, %xmm2
+; AVX-NEXT:    vmulss %xmm2, %xmm1, %xmm1
+; AVX-NEXT:    vmovss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; AVX-NEXT:    vsubss %xmm1, %xmm3, %xmm1
+; AVX-NEXT:    vmulss %xmm1, %xmm2, %xmm1
+; AVX-NEXT:    vaddss %xmm1, %xmm2, %xmm1
 ; AVX-NEXT:    vpermilps {{.*#+}} xmm1 = xmm1[0,0,0,0]
 ; AVX-NEXT:    vinsertf128 $1, %xmm1, %ymm1, %ymm1
-; AVX-NEXT:    vrcpps %ymm1, %ymm2
-; AVX-NEXT:    vmulps %ymm2, %ymm1, %ymm1
-; AVX-NEXT:    vmovaps {{.*#+}} ymm3 = [1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0,1.0E+0]
-; AVX-NEXT:    vsubps %ymm1, %ymm3, %ymm1
-; AVX-NEXT:    vmulps %ymm1, %ymm2, %ymm1
-; AVX-NEXT:    vaddps %ymm1, %ymm2, %ymm1
 ; AVX-NEXT:    vmulps %ymm1, %ymm0, %ymm0
 ; AVX-NEXT:    retq
   %vy = insertelement <8 x float> undef, float %y, i32 0