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Use a legal integer type for vector shuffle mask

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elements.  Otherwise LegalizeTypes will, reasonably
enough, legalize the mask, which may result in it
no longer being a BUILD_VECTOR node (LegalizeDAG
simply ignores the legality or not of vector masks).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57782 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-10-19 14:58:05 +00:00
parent 2a0b96c2c7
commit 94989acaab
1 changed files with 4 additions and 4 deletions
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8
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -5134,24 +5134,24 @@ SDValue DAGCombiner::XformToShuffleWithZero(SDNode *N) {
std::vector<SDValue> IdxOps;
unsigned NumOps = RHS.getNumOperands();
unsigned NumElts = NumOps;
MVT EVT = RHS.getValueType().getVectorElementType();
for (unsigned i = 0; i != NumElts; ++i) {
SDValue Elt = RHS.getOperand(i);
if (!isa<ConstantSDNode>(Elt))
return SDValue();
else if (cast<ConstantSDNode>(Elt)->isAllOnesValue())
IdxOps.push_back(DAG.getConstant(i, EVT));
IdxOps.push_back(DAG.getIntPtrConstant(i));
else if (cast<ConstantSDNode>(Elt)->isNullValue())
IdxOps.push_back(DAG.getConstant(NumElts, EVT));
IdxOps.push_back(DAG.getIntPtrConstant(NumElts));
else
return SDValue();
}
// Let's see if the target supports this vector_shuffle.
if (!TLI.isVectorClearMaskLegal(IdxOps, EVT, DAG))
if (!TLI.isVectorClearMaskLegal(IdxOps, TLI.getPointerTy(), DAG))
return SDValue();
// Return the new VECTOR_SHUFFLE node.
MVT EVT = RHS.getValueType().getVectorElementType();
MVT VT = MVT::getVectorVT(EVT, NumElts);
std::vector<SDValue> Ops;
LHS = DAG.getNode(ISD::BIT_CONVERT, VT, LHS);