[all-commits] [llvm/llvm-project] 8f70b8: [CodeGen] Temporarily disable-lsr in HWASAN build

Vitaly Buka via All-commits all-commits at lists.llvm.org
Thu Dec 29 23:38:08 PST 2022

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8f70b848d339cabfaa8f1379d41dae11b9b75014
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2022-12-29 (Thu, 29 Dec 2022)

  Changed paths:
    M llvm/lib/CodeGen/TargetPassConfig.cpp

  Log Message:
  [CodeGen] Temporarily disable-lsr in HWASAN build

HWASAN exposes some non-determinism in the pass and triggers:
ScalarEvolution.cpp:11540: bool llvm::ScalarEvolution::isLoopEntryGuardedByCond(const Loop *, ICmpInst::Predicate, const SCEV *, const SCEV *): Assertion `isAvailableAtLoopEntry(LHS, L) && "LHS is not available at Loop Entry"' failed.

is broken after D137838. I tried to split D137838 into smaller patches
and the one which reproduced was just a move of cpp from one dir to another.

Maybe it has something do to with comparison of tagged pointeres and
PtrSets used in pass.

Issues is hard to reproduce, even slight changes in path, or preprocessing
cpp file hide it.

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