[all-commits] [llvm/llvm-project] 4b3ba6: [SCEVExpander] Clear flags when reusing GEP (#109293)

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4b3ba64ba71c06b6bc9db347a66a7316f5edbcc4
      https://github.com/llvm/llvm-project/commit/4b3ba64ba71c06b6bc9db347a66a7316f5edbcc4
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-10-01 (Tue, 01 Oct 2024)

  Changed paths:
    M llvm/include/llvm/Transforms/Utils/ScalarEvolutionExpander.h
    M llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
    M llvm/test/CodeGen/WebAssembly/simd-shift-in-loop.ll
    M llvm/test/Transforms/LoopStrengthReduce/AMDGPU/preserve-addrspace-assert.ll
    M llvm/test/Transforms/LoopStrengthReduce/ARM/illegal-addr-modes.ll
    M llvm/unittests/Transforms/Utils/ScalarEvolutionExpanderTest.cpp

  Log Message:
  -----------
  [SCEVExpander] Clear flags when reusing GEP (#109293)

As pointed out in the review of #102133, SCEVExpander currently
incorrectly reuses GEP instructions that have poison-generating flags
set. Fix this by clearing the flags on the reused instruction.



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