Index: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -12030,8 +12030,8 @@
   // Selection pass has a hard time dealing with FP constants.
   bool AllowNewConst = (Level < AfterLegalizeDAG);
 
-  // If 'unsafe math' or nnan is enabled, fold lots of things.
-  if ((Options.UnsafeFPMath || Flags.hasNoNaNs()) && AllowNewConst) {
+  // If nnan is enabled, fold lots of things.
+  if ((Options.NoNaNsFPMath || Flags.hasNoNaNs()) && AllowNewConst) {
     // If allowed, fold (fadd (fneg x), x) -> 0.0
     if (N0.getOpcode() == ISD::FNEG && N0.getOperand(0) == N1)
       return DAG.getConstantFP(0.0, DL, VT);
@@ -12171,7 +12171,7 @@
 
   if (N0 == N1) {
     // (fsub x, x) -> 0.0
-    if (Options.UnsafeFPMath || Flags.hasNoNaNs())
+    if (Options.NoNaNsFPMath || Flags.hasNoNaNs())
       return DAG.getConstantFP(0.0f, DL, VT);
   }
 
@@ -12249,7 +12249,7 @@
   if (SDValue NewSel = foldBinOpIntoSelect(N))
     return NewSel;
 
-  if (Options.UnsafeFPMath ||
+  if ((Options.NoNaNsFPMath && Options.NoSignedZerosFPMath) ||
       (Flags.hasNoNaNs() && Flags.hasNoSignedZeros())) {
     // fold (fmul A, 0) -> 0
     if (N1CFP && N1CFP->isZero())
Index: llvm/trunk/test/CodeGen/ARM/nnan-fsub.ll
===================================================================
--- llvm/trunk/test/CodeGen/ARM/nnan-fsub.ll
+++ llvm/trunk/test/CodeGen/ARM/nnan-fsub.ll
@@ -0,0 +1,18 @@
+; RUN: llc -mcpu=cortex-a9 < %s | FileCheck -check-prefix=SAFE %s
+; RUN: llc -mcpu=cortex-a9 --enable-no-nans-fp-math < %s | FileCheck -check-prefix=FAST %s
+
+target triple = "armv7-apple-ios"
+
+; SAFE: test
+; FAST: test
+define float @test(float %x, float %y) {
+entry:
+; SAFE: vmul.f32
+; SAFE: vsub.f32
+; FAST: mov r0, #0
+  %0 = fmul float %x, %y
+  %1 = fsub float %0, %0
+  ret float %1
+}
+
+
Index: llvm/trunk/test/CodeGen/ARM/unsafe-fsub.ll
===================================================================
--- llvm/trunk/test/CodeGen/ARM/unsafe-fsub.ll
+++ llvm/trunk/test/CodeGen/ARM/unsafe-fsub.ll
@@ -1,18 +0,0 @@
-; RUN: llc -mcpu=cortex-a9 < %s | FileCheck -check-prefix=SAFE %s
-; RUN: llc -mcpu=cortex-a9 -enable-unsafe-fp-math < %s | FileCheck -check-prefix=FAST %s
-
-target triple = "armv7-apple-ios"
-
-; SAFE: test
-; FAST: test
-define float @test(float %x, float %y) {
-entry:
-; SAFE: vmul.f32
-; SAFE: vsub.f32
-; FAST: mov r0, #0
-  %0 = fmul float %x, %y
-  %1 = fsub float %0, %0
-  ret float %1
-}
-
-
Index: llvm/trunk/test/CodeGen/X86/fmul-combines.ll
===================================================================
--- llvm/trunk/test/CodeGen/X86/fmul-combines.ll
+++ llvm/trunk/test/CodeGen/X86/fmul-combines.ll
@@ -76,12 +76,12 @@
   ret <4 x float> %y
 }
 
-define <4 x float> @fmul0_v4f32(<4 x float> %x) #0 {
-; CHECK-LABEL: fmul0_v4f32:
+define <4 x float> @fmul0_v4f32_nsz_nnan(<4 x float> %x) #0 {
+; CHECK-LABEL: fmul0_v4f32_nsz_nnan:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    xorps %xmm0, %xmm0
 ; CHECK-NEXT:    retq
-  %y = fmul <4 x float> %x, <float 0.0, float 0.0, float 0.0, float 0.0>
+  %y = fmul nnan nsz <4 x float> %x, <float 0.0, float 0.0, float 0.0, float 0.0>
   ret <4 x float> %y
 }
 
@@ -90,7 +90,7 @@
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    xorps %xmm0, %xmm0
 ; CHECK-NEXT:    retq
-  %y = fmul <4 x float> %x, <float undef, float 0.0, float undef, float 0.0>
+  %y = fmul nnan nsz <4 x float> %x, <float undef, float 0.0, float undef, float 0.0>
   ret <4 x float> %y
 }
 
Index: llvm/trunk/test/CodeGen/X86/fp-fast.ll
===================================================================
--- llvm/trunk/test/CodeGen/X86/fp-fast.ll
+++ llvm/trunk/test/CodeGen/X86/fp-fast.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
-; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=avx -enable-unsafe-fp-math < %s | FileCheck %s
+; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=avx -enable-unsafe-fp-math --enable-no-nans-fp-math < %s | FileCheck %s
 
 define float @test1(float %a) {
 ; CHECK-LABEL: test1: