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[DAG] Remove pointless peephole from refineUniformBase [nfc]

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No need to special case add 0, N.  SelectionDAG::getNode contains the canonicalization and simplification for this case, so no need to duplicate it here.
This commit is contained in:
Philip Reames 2023-09-13 10:13:34 -07:00 committed by Philip Reames
parent e9e1892b83
commit 61757fbd04
1 changed files with 3 additions and 12 deletions
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15
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -11650,10 +11650,7 @@ bool refineUniformBase(SDValue &BasePtr, SDValue &Index, bool IndexIsScaled,
if (SDValue SplatVal = DAG.getSplatValue(Index);
SplatVal && !isNullConstant(SplatVal) &&
SplatVal.getValueType() == VT) {
if (isNullConstant(BasePtr))
BasePtr = SplatVal;
else
BasePtr = DAG.getNode(ISD::ADD, DL, VT, BasePtr, SplatVal);
BasePtr = DAG.getNode(ISD::ADD, DL, VT, BasePtr, SplatVal);
Index = DAG.getSplat(Index.getValueType(), DL, DAG.getConstant(0, DL, VT));
return true;
}
@ -11663,19 +11660,13 @@ bool refineUniformBase(SDValue &BasePtr, SDValue &Index, bool IndexIsScaled,
if (SDValue SplatVal = DAG.getSplatValue(Index.getOperand(0));
SplatVal && SplatVal.getValueType() == VT) {
if (isNullConstant(BasePtr))
BasePtr = SplatVal;
else
BasePtr = DAG.getNode(ISD::ADD, DL, VT, BasePtr, SplatVal);
BasePtr = DAG.getNode(ISD::ADD, DL, VT, BasePtr, SplatVal);
Index = Index.getOperand(1);
return true;
}
if (SDValue SplatVal = DAG.getSplatValue(Index.getOperand(1));
SplatVal && SplatVal.getValueType() == VT) {
if (isNullConstant(BasePtr))
BasePtr = SplatVal;
else
BasePtr = DAG.getNode(ISD::ADD, DL, VT, BasePtr, SplatVal);
BasePtr = DAG.getNode(ISD::ADD, DL, VT, BasePtr, SplatVal);
Index = Index.getOperand(0);
return true;
}