[llvm] [VPlan] Expand VPWidenPointerInductionRecipe into separate recipes (PR #148274)

[Luke Lau via llvm-commits]

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@@ -1083,6 +1090,8 @@ bool VPInstruction::onlyFirstLaneUsed(const VPValue *Op) const {
     return true;
   case VPInstruction::PtrAdd:
     return Op == getOperand(0) || vputils::onlyFirstLaneUsed(this);
+  case VPInstruction::WidePtrAdd:
+    return Op == getOperand(0);
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lukel97 wrote:

Unlike PtrAdd, WidePtrAdd always needs a scalar base address and vector offset, and always produces a vector value. 

PtrAdd can generate a scalar which is why it needs the onlyFirstLaneUsed check

https://github.com/llvm/llvm-project/pull/148274