r107852 is only safe with -enable-unsafe-fp-math to account for +0.0 == -0.0.

llvm-svn: 107856

1 files changed, 5 insertions, 3 deletions

diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index e3db5832980..8ca69cd6122 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -2295,11 +2295,13 @@ SDValue
 ARMTargetLowering::getVFPCmp(SDValue &LHS, SDValue &RHS, ISD::CondCode CC,
                              SDValue &ARMCC, SelectionDAG &DAG,
                              DebugLoc dl) const {
-  if ((CC == ISD::SETEQ || CC == ISD::SETOEQ ||
+  if (UnsafeFPMath &&
+      (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
        CC == ISD::SETNE || CC == ISD::SETUNE) &&
       canBitcastToInt(LHS.getNode()) && canBitcastToInt(RHS.getNode())) {
-    // If there are no othter uses of the CMP operands, and the condition
-    // code is EQ oe NE, we can optimize it to an integer comparison.
+    // If unsafe fp math optimization is enabled and there are no othter uses of
+    // the CMP operands, and the condition code is EQ oe NE, we can optimize it
+    // to an integer comparison.
     if (CC == ISD::SETOEQ)
       CC = ISD::SETEQ;
     else if (CC == ISD::SETUNE)