[llvm] [VPlan] Update scalar induction resume values in VPlan. (PR #110577)

[via llvm-commits]

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@@ -7621,21 +7646,8 @@ static void fixReductionScalarResumeWhenVectorizingEpilog(
   auto *EpiResumePhiVPI =
       cast<VPInstruction>(*find_if(EpiRedResult->users(), IsResumePhi));
   auto *EpiResumePhi = cast<PHINode>(State.get(EpiResumePhiVPI, true));
-  BasicBlock *LoopScalarPreHeader = EpiResumePhi->getParent();
-  bool Updated = false;
-  for (auto *Incoming : predecessors(LoopScalarPreHeader)) {
-    if (is_contained(MainResumePhi->blocks(), Incoming)) {
-      assert(EpiResumePhi->getIncomingValueForBlock(Incoming) ==
-                 RdxDesc.getRecurrenceStartValue() &&
-             "Trying to reset unexpected value");
-      assert(!Updated && "Should update at most 1 incoming value");
-      EpiResumePhi->setIncomingValueForBlock(
-          Incoming, MainResumePhi->getIncomingValueForBlock(Incoming));
-      Updated = true;
-    }
-  }
-  assert(Updated && "Must update EpiResumePhi.");
-  (void)Updated;
+  EpiResumePhi->setIncomingValueForBlock(
+      BypassBlock, MainResumePhi->getIncomingValueForBlock(BypassBlock));
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ayalz wrote:

Nice cleanup of searching for BypassBlock!

https://github.com/llvm/llvm-project/pull/110577