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[LegalizeVectorOps] Split most of ExpandStrictFPOp into a separate UnrollStrictFPOp method. Call that method from ExpandUINT_TO_FLOAT.

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ExpandStrictFPOp calls ExpandUINT_TO_FLOAT. Previously, ExpandUINT_TO_FLOAT
returned SDValue() if it wasn't able to handle and needed to unroll.
Then ExpandStrictFPOp would detect his SDValue() and do the unroll.

After this change, ExpandUINT_TO_FLOAT will directly call
UnrollStrictFPOp and return the unrolled result.
This commit is contained in:
Craig Topper 2020-01-04 17:03:33 -08:00
parent bdc5b287f8
commit c3e9b9b27d
1 changed files with 13 additions and 6 deletions
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19
lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
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@ -148,6 +148,8 @@ class VectorLegalizer {
SDValue ExpandFixedPointMul(SDValue Op);
SDValue ExpandStrictFPOp(SDValue Op);
SDValue UnrollStrictFPOp(SDValue Op);
/// Implements vector promotion.
///
/// This is essentially just bitcasting the operands to a different type and
@ -1208,8 +1210,11 @@ SDValue VectorLegalizer::ExpandUINT_TO_FLOAT(SDValue Op) {
TargetLowering::Expand) ||
(IsStrict && TLI.getOperationAction(ISD::STRICT_SINT_TO_FP, VT) ==
TargetLowering::Expand)) ||
TLI.getOperationAction(ISD::SRL, VT) == TargetLowering::Expand)
return IsStrict ? SDValue() : DAG.UnrollVectorOp(Op.getNode());
TLI.getOperationAction(ISD::SRL, VT) == TargetLowering::Expand) {
if (IsStrict)
return UnrollStrictFPOp(Op);
return DAG.UnrollVectorOp(Op.getNode());
}
unsigned BW = VT.getScalarSizeInBits();
assert((BW == 64 || BW == 32) &&
@ -1386,11 +1391,13 @@ SDValue VectorLegalizer::ExpandFixedPointMul(SDValue Op) {
}
SDValue VectorLegalizer::ExpandStrictFPOp(SDValue Op) {
if (Op.getOpcode() == ISD::STRICT_UINT_TO_FP) {
if (SDValue Res = ExpandUINT_TO_FLOAT(Op))
return Res;
}
if (Op.getOpcode() == ISD::STRICT_UINT_TO_FP)
return ExpandUINT_TO_FLOAT(Op);
return UnrollStrictFPOp(Op);
}
SDValue VectorLegalizer::UnrollStrictFPOp(SDValue Op) {
EVT VT = Op.getValue(0).getValueType();
EVT EltVT = VT.getVectorElementType();
unsigned NumElems = VT.getVectorNumElements();