Index: lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -718,6 +718,16 @@
     return 1;
 
   case ISD::FMUL:
+    if (Options->HonorSignDependentRoundingFPMathOption && 
+        !Options->UnsafeFPMath && !Flags.hasNoNaNs()) return 0;
+		
+    // fold (fneg (fmul X, Y)) -> (fmul (fneg X), Y) or (fmul X, (fneg Y))
+    if (char V = isNegatibleForFree(Op.getOperand(0), LegalOperations, TLI,
+                                    Options, Depth + 1))
+      return V;
+
+    return isNegatibleForFree(Op.getOperand(1), LegalOperations, TLI, Options,
+                              Depth + 1);
   case ISD::FDIV:
     if (Options->HonorSignDependentRoundingFPMath()) return 0;
 
@@ -783,7 +793,7 @@
 
   case ISD::FMUL:
   case ISD::FDIV:
-    assert(!Options.HonorSignDependentRoundingFPMath());
+    assert(!Options.HonorSignDependentRoundingFPMath() || Flags.hasNoNaNs());
 
     // fold (fneg (fmul X, Y)) -> (fmul (fneg X), Y)
     if (isNegatibleForFree(Op.getOperand(0), LegalOperations,
@@ -10502,12 +10512,15 @@
   if (SDValue NewSel = foldBinOpIntoSelect(N))
     return NewSel;
 
-  if (Options.UnsafeFPMath) {
+  if (Options.UnsafeFPMath || 
+      (Flags.hasNoNaNs() && Flags.hasNoSignedZeros())) {
     // fold (fmul A, 0) -> 0
     if (N1CFP && N1CFP->isZero())
       return N1;
+  } 
 
-    // fmul (fmul X, C1), X2 -> fmul X, C1 * C2
+  if (Options.UnsafeFPMath || Flags.hasAllowReassociation()) {
+    // fmul (fmul X, C1), C2 -> fmul X, C1 * C2
     if (N0.getOpcode() == ISD::FMUL) {
       // Fold scalars or any vector constants (not just splats).
       // This fold is done in general by InstCombine, but extra fmul insts
Index: test/CodeGen/X86/fmul-combines.ll
===================================================================
--- test/CodeGen/X86/fmul-combines.ll
+++ test/CodeGen/X86/fmul-combines.ll
@@ -92,7 +92,6 @@
 ; CHECK-LABEL: fmul_v4f32_two_consts_no_splat_reassoc:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    mulps {{.*}}(%rip), %xmm0
-; CHECK-NEXT:    mulps {{.*}}(%rip), %xmm0
 ; CHECK-NEXT:    retq
   %y = fmul <4 x float> %x, <float 1.0, float 2.0, float 3.0, float 4.0>
   %z = fmul reassoc <4 x float> %y, <float 5.0, float 6.0, float 7.0, float 8.0>
@@ -104,7 +103,6 @@
 define <4 x float> @fmul_v4f32_two_consts_no_splat_reassoc_2(<4 x float> %x) {
 ; CHECK-LABEL: fmul_v4f32_two_consts_no_splat_reassoc_2:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    addps %xmm0, %xmm0
 ; CHECK-NEXT:    mulps {{.*}}(%rip), %xmm0
 ; CHECK-NEXT:    retq
   %y = fadd <4 x float> %x, %x
Index: test/CodeGen/X86/fp-fold.ll
===================================================================
--- test/CodeGen/X86/fp-fold.ll
+++ test/CodeGen/X86/fp-fold.ll
@@ -103,16 +103,10 @@
 
 ; TODO: handle x*0 for fast flags the same as unsafe
 define float @fmul_zero(float %x) {
-; STRICT-LABEL: fmul_zero:
-; STRICT:       # %bb.0:
-; STRICT-NEXT:    xorps %xmm1, %xmm1
-; STRICT-NEXT:    mulss %xmm1, %xmm0
-; STRICT-NEXT:    retq
-;
-; UNSAFE-LABEL: fmul_zero:
-; UNSAFE:       # %bb.0:
-; UNSAFE-NEXT:    xorps %xmm0, %xmm0
-; UNSAFE-NEXT:    retq
+; ANY-LABEL: fmul_zero:
+; ANY:       # %bb.0:
+; ANY-NEXT:    xorps %xmm0, %xmm0
+; ANY-NEXT:    retq
   %r = fmul nnan nsz float %x, 0.0
   ret float %r
 }
@@ -124,3 +118,13 @@
   %r = fmul float %x, 1.0
   ret float %r
 }
+
+define float @fmul_x_const_const(float %x) {
+; ANY-LABEL: fmul_x_const_const:
+; ANY:       # %bb.0:
+; ANY-NEXT:    mulss {{.*}}(%rip), %xmm0
+; ANY-NEXT:    retq
+  %mul = fmul reassoc float %x, 9.0
+  %r = fmul reassoc float %mul, 4.0
+  ret float %r
+}