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[DAGCombiner] shorten code for bitcast+fabs fold; NFC 

llvm-svn: 343939
This commit is contained in:
Sanjay Patel 2018-10-07 15:18:30 +00:00
parent 31a3f2aaba
commit 46a9dc2e3e
1 changed files with 2 additions and 5 deletions
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7
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -12162,11 +12162,8 @@ SDValue DAGCombiner::visitFABS(SDNode *N) {
if (N0.getOpcode() == ISD::FNEG || N0.getOpcode() == ISD::FCOPYSIGN)
return DAG.getNode(ISD::FABS, SDLoc(N), VT, N0.getOperand(0));
// Transform fabs(bitconvert(x)) -> bitconvert(x & ~sign) to avoid loading
// constant pool values.
if (!TLI.isFAbsFree(VT) &&
N0.getOpcode() == ISD::BITCAST &&
N0.getNode()->hasOneUse()) {
// fabs(bitcast(x)) -> bitcast(x & ~sign) to avoid constant pool loads.
if (!TLI.isFAbsFree(VT) && N0.getOpcode() == ISD::BITCAST && N0.hasOneUse()) {
SDValue Int = N0.getOperand(0);
EVT IntVT = Int.getValueType();
if (IntVT.isInteger() && !IntVT.isVector()) {