Culling out use of unions for converting FP to bits and vice versa.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22838 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 6afa9d0..81b0803 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -224,12 +224,8 @@
N->getValueType(0)));
break;
case ISD::ConstantFP: {
- union {
- double DV;
- uint64_t IV;
- };
- DV = cast<ConstantFPSDNode>(N)->getValue();
- ConstantFPs.erase(std::make_pair(IV, N->getValueType(0)));
+ uint64_t V = DoubleToBits(cast<ConstantFPSDNode>(N)->getValue());
+ ConstantFPs.erase(std::make_pair(V, N->getValueType(0)));
break;
}
case ISD::CONDCODE:
@@ -385,14 +381,7 @@
// Do the map lookup using the actual bit pattern for the floating point
// value, so that we don't have problems with 0.0 comparing equal to -0.0, and
// we don't have issues with SNANs.
- union {
- double DV;
- uint64_t IV;
- };
-
- DV = Val;
-
- SDNode *&N = ConstantFPs[std::make_pair(IV, VT)];
+ SDNode *&N = ConstantFPs[std::make_pair(DoubleToBits(Val), VT)];
if (N) return SDOperand(N, 0);
N = new ConstantFPSDNode(Val, VT);
AllNodes.push_back(N);