[all-commits] [llvm/llvm-project] e302fa: [LoopUnroll] Forget exit values when making changes.

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e302fa89aa45afceedb711a264cfc486395aca17
      https://github.com/llvm/llvm-project/commit/e302fa89aa45afceedb711a264cfc486395aca17
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2022-10-18 (Tue, 18 Oct 2022)

  Changed paths:
    M llvm/lib/Transforms/Utils/LoopUnroll.cpp
    M llvm/test/Transforms/LoopUnroll/scev-forget-exit-phis.ll

  Log Message:
  -----------
  [LoopUnroll] Forget exit values when making changes.

When unrolling, the exit values in LCSSA phis will get updated.
Invalidate cached SCEV values for those phis in case SCEV looked through
a exit phi.

Fixes #58340.