Revert r81171 which was causing pr4927.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81415 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 8550ea9..f0c7086 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -615,25 +615,12 @@
unsigned OpReg = getRegForValue(BinaryOperator::getFNegArgument(I));
if (OpReg == 0) return false;
- // Bitcast the value to integer, twiddle the sign bit with xor,
- // and then bitcast it back to floating-point.
+ // Twiddle the sign bit with xor.
EVT VT = TLI.getValueType(I->getType());
if (VT.getSizeInBits() > 64) return false;
- EVT IntVT = EVT::getIntegerVT(I->getContext(), VT.getSizeInBits());
-
- unsigned IntReg = FastEmit_r(VT.getSimpleVT(), IntVT.getSimpleVT(),
- ISD::BIT_CONVERT, OpReg);
- if (IntReg == 0)
- return false;
-
- unsigned IntResultReg = FastEmit_ri_(IntVT.getSimpleVT(), ISD::XOR, IntReg,
- UINT64_C(1) << (VT.getSizeInBits()-1),
- IntVT.getSimpleVT());
- if (IntResultReg == 0)
- return false;
-
- unsigned ResultReg = FastEmit_r(IntVT.getSimpleVT(), VT.getSimpleVT(),
- ISD::BIT_CONVERT, IntResultReg);
+ unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISD::XOR, OpReg,
+ UINT64_C(1) << (VT.getSizeInBits()-1),
+ VT.getSimpleVT());
if (ResultReg == 0)
return false;