[all-commits] [llvm/llvm-project] 1fbdbb: Revert "Recommit "[SCEV] Look through single value...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1fbdbb559569641f6d509b569966901c8fb02b63
      https://github.com/llvm/llvm-project/commit/1fbdbb559569641f6d509b569966901c8fb02b63
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2021-09-30 (Thu, 30 Sep 2021)

  Changed paths:
    M llvm/lib/Analysis/ScalarEvolution.cpp
    M llvm/test/Analysis/DependenceAnalysis/lcssa.ll
    M llvm/test/Analysis/ScalarEvolution/cycled_phis.ll
    M llvm/test/Analysis/ScalarEvolution/incorrect-exit-count.ll
    M llvm/test/Analysis/ScalarEvolution/solve-quadratic-i1.ll
    M llvm/test/Analysis/ScalarEvolution/solve-quadratic-overflow.ll
    M llvm/test/Transforms/LoopStrengthReduce/funclet.ll
    M llvm/test/Transforms/LoopVectorize/pr45259.ll

  Log Message:
  -----------
  Revert "Recommit "[SCEV] Look through single value PHIs." (take 2)"

This reverts commit 764d9aa97905f202385b4f25f8d234630b4feef3.

This patch exposed a few additional cases where SCEV expressions are not
properly invalidated.

See PR52024, PR52023.