[all-commits] [llvm/llvm-project] 8b4b5c: [AMDGPU][SIInsertWaitCnts] skip meta instructions ...

[Sameer Sahasrabuddhe via All-commits]

  Branch: refs/heads/users/ssahasra/waitcnt-cleanup
  Home:   https://github.com/llvm/llvm-project
  Commit: 8b4b5cdd1bc5aef84b2661edb7df653c4a415fa8
      https://github.com/llvm/llvm-project/commit/8b4b5cdd1bc5aef84b2661edb7df653c4a415fa8
  Author: Sameer Sahasrabuddhe <sameer.sahasrabuddhe at amd.com>
  Date:   2025-06-30 (Mon, 30 Jun 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp

  Log Message:
  -----------
  [AMDGPU][SIInsertWaitCnts] skip meta instructions early

When iterating over a block, meta instructions have no effect on wait counts,
but their presence drops the reference to earlier waitcnt instructions before
they are processed. This results in spurious wait counts, which do not affect
correctness, but are also not required in the resulting program. Skipping meta
instructions as soon as they are seen cleans this up.



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