[llvm] [PowerPC] Improve pwr7 codegen for v4i8 load (PR #104507)

[via llvm-commits]

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@@ -11490,13 +11490,38 @@ SDValue PPCTargetLowering::LowerIS_FPCLASS(SDValue Op,
 SDValue PPCTargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op,
                                                  SelectionDAG &DAG) const {
   SDLoc dl(Op);
+
+  MachineFunction &MF = DAG.getMachineFunction();
+  SDValue Op0 = Op.getOperand(0);
+  ReuseLoadInfo RLI;
+  if (Subtarget.hasVSX() && Op.getValueType() == MVT::v4i32 &&
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RolandF77 wrote:

The check for VSX was actually for the use of xxspltw. I was assuming anything with vectors had lfiwax, but there's no harm in checking.

https://github.com/llvm/llvm-project/pull/104507