================
@@ -6345,6 +6386,39 @@ bool SystemZTargetLowering::isVectorElementLoad(SDValue
Op) const {
return false;
}
+static SDValue mergeHighParts(SelectionDAG &DAG, const SDLoc &DL,
+ unsigned MergedBits, EVT VT, SDValue Op0,
+ SDValue Op1) {
+ MVT IntVecVT = MVT::getVectorVT(MVT::getIntegerVT(MergedBits),
+ SystemZ::VectorBits / MergedBits);
+ assert(VT.getSizeInBits() == 128 && IntVecVT.getSizeInBits() == 128 &&
+ "Handling full vectors only.");
+ Op0 = DAG.getNode(ISD::BITCAST, DL, IntVecVT, Op0);
+ Op1 = DAG.getNode(ISD::BITCAST, DL, IntVecVT, Op1);
+ SDValue Op = DAG.getNode(SystemZISD::MERGE_HIGH, DL, IntVecVT, Op0, Op1);
+ return DAG.getNode(ISD::BITCAST, DL, VT, Op);
+}
+
+static SDValue buildFPVecFromScalars4(SelectionDAG &DAG, const SDLoc &DL,
+ EVT VT, SmallVectorImpl<SDValue> &Elems,
+ unsigned Pos) {
+ SDValue Op01 = buildMergeScalars(DAG, DL, VT, Elems[Pos + 0], Elems[Pos +
1]);
+ SDValue Op23 = buildMergeScalars(DAG, DL, VT, Elems[Pos + 2], Elems[Pos +
3]);
+ // Avoid unnecessary undefs by reusing the other operand.
+ if (Op01.isUndef()) {
+ if (Op23.isUndef())
+ return Op01;
+ Op01 = Op23;
+ }
+ else if (Op23.isUndef())
----------------
arsenm wrote:
```suggestion
} else if (Op23.isUndef())
```
https://github.com/llvm/llvm-project/pull/171066
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