[llvm] [VPlan] Introduce explicit broadcasts for live-ins. (PR #124644)

[via llvm-commits]

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@@ -825,6 +828,8 @@ bool VPInstruction::onlyFirstLaneUsed(const VPValue *Op) const {
   case VPInstruction::BranchOnCond:
   case VPInstruction::ResumePhi:
     return true;
+  case VPInstruction::PtrAdd:
+    return Op == getOperand(0) || vputils::onlyFirstLaneUsed(this);
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ayalz wrote:

Why restrict to first operand?

https://github.com/llvm/llvm-project/pull/124644