[llvm] [VPlan] Don't collect live-ins in collectUsersInExitBlocks. (NFC) (PR #123819)

[David Sherwood via llvm-commits]

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@@ -9077,11 +9081,6 @@ addUsersInExitBlocks(VPlan &Plan,
   // modeling the corresponding LCSSA phis.
   for (VPIRInstruction *ExitIRI : ExitUsersToFix) {
     for (const auto &[Idx, Op] : enumerate(ExitIRI->operands())) {
-      // Pass live-in values used by exit phis directly through to their users
-      // in the exit block.
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david-arm wrote:

Can you hold off on this patch for a bit until I've tested the interaction with https://github.com/llvm/llvm-project/pull/120567 please? I'm worried this essentially means that there is no sensible way to get hold of the predecessor.

https://github.com/llvm/llvm-project/pull/123819