[all-commits] [llvm/llvm-project] 99d70e: [SCEV] Allow adds of constants in tryToReuseLCSSAP...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 99d70e09a9676d63513a496f52acf93ca7167f00
      https://github.com/llvm/llvm-project/commit/99d70e09a9676d63513a496f52acf93ca7167f00
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-07-31 (Thu, 31 Jul 2025)

  Changed paths:
    M llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
    M llvm/test/Transforms/LoopIdiom/reuse-lcssa-phi-scev-expansion.ll
    M llvm/test/Transforms/LoopVectorize/reuse-lcssa-phi-scev-expansion.ll

  Log Message:
  -----------
  [SCEV] Allow adds of constants in tryToReuseLCSSAPhi. (#150693)

Update the logic added in
https://github.com/llvm/llvm-project/pull/147824 to also allow adds of
constants. There are a number of cases where this can help remove
redundant phis and replace some computation with a ptrtoint (which
likely is free in the backend).

PR: https://github.com/llvm/llvm-project/pull/150693



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