[all-commits] [llvm/llvm-project] 076513: [Local] Only intersect llvm.access.group metadata ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 076513646cfd922b42ea0e87e2f07397a3ff41a4
      https://github.com/llvm/llvm-project/commit/076513646cfd922b42ea0e87e2f07397a3ff41a4
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-11-19 (Tue, 19 Nov 2024)

  Changed paths:
    M llvm/lib/Transforms/Utils/Local.cpp
    M llvm/test/Transforms/InstCombine/intersect-accessgroup.ll
    M llvm/test/Transforms/InstCombine/loadstore-metadata.ll
    M llvm/test/Transforms/PhaseOrdering/X86/preserve-access-group.ll

  Log Message:
  -----------
  [Local] Only intersect llvm.access.group metadata if instr moves. (#115868)

Preserve llvm.access.group metadata on the replacement instruction, if
it does not move. In that case, the program would be UB, if the parallel
property encoded in the metadata does not hold.

This matches the LangRef recently updated in #116220

PR https://github.com/llvm/llvm-project/pull/115868



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