[all-commits] [llvm/llvm-project] dc2867: Revert "[SCEVExpander] Add option to preserve LCSS...

[Florian Hahn via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: dc2867576886247cbe351e7c63618c09ab6af808
      https://github.com/llvm/llvm-project/commit/dc2867576886247cbe351e7c63618c09ab6af808
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2020-07-29 (Wed, 29 Jul 2020)

  Changed paths:
    M llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h
    M llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
    M llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
    M llvm/unittests/Transforms/Utils/ScalarEvolutionExpanderTest.cpp

  Log Message:
  -----------
  Revert "[SCEVExpander] Add option to preserve LCSSA directly."

This reverts commit 99166fd4fb422351f131fb1265cb85d5f6c5b8da, because it
breaks the polly builders.

polly/test/Isl/CodeGen/invariant_load_escaping_second_scop.ll fails
because a apparently unnecessary LCSSA phi node is introduced.

Make the bots green again, while I take a closer look.