[all-commits] [llvm/llvm-project] 615504: [PGO] Add a debugging switch for wave profile meta...

[Yaxun (Sam) Liu via All-commits]

  Branch: refs/heads/users/yxsamliu/pgo-wave-profile-loader
  Home:   https://github.com/llvm/llvm-project
  Commit: 615504e67a64d21cc25de485df7d88a3a6a6d9fd
      https://github.com/llvm/llvm-project/commit/615504e67a64d21cc25de485df7d88a3a6a6d9fd
  Author: Yaxun (Sam) Liu <yaxun.liu at amd.com>
  Date:   2026-09-28 (Mon, 28 Sep 2026)

  Changed paths:
    M llvm/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
    M llvm/test/Transforms/PGOProfile/wave-profile-use.ll

  Log Message:
  -----------
  [PGO] Add a debugging switch for wave profile metadata

Add the hidden pgo-wave-metadata option, enabled by default, for debugging,
performance comparisons and disabling wave annotations when investigating
regressions without turning off ordinary PGO or uniformity hints.

Gate wave metadata emission while retaining the existing clearing of stale
function and block annotations during profile use. Profile collection and
ordinary count reconstruction are unchanged.

Test default/explicit enablement, disabling, retained counts and uniformity
hints, and replacement profiles with missing, mismatched or zero counts.



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