[all-commits] [llvm/llvm-project] a086fb: [AMDGPU][gfx1250] Add wait_xcnt before any access ...

[Pierre van Houtryve via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a086fb2fbbc0f488dd2a2c60d09196ea7218742f
      https://github.com/llvm/llvm-project/commit/a086fb2fbbc0f488dd2a2c60d09196ea7218742f
  Author: Pierre van Houtryve <pierre.vanhoutryve at amd.com>
  Date:   2025-11-25 (Tue, 25 Nov 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/GCNSubtarget.h
    M llvm/lib/Target/AMDGPU/SIInstrInfo.h
    M llvm/lib/Target/AMDGPU/SIMemoryLegalizer.cpp
    M llvm/test/CodeGen/AMDGPU/bf16.ll
    M llvm/test/CodeGen/AMDGPU/integer-mad-patterns.ll
    A llvm/test/CodeGen/AMDGPU/memory-legalizer-buffer-atomics.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-flat-lastuse.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-flat-nontemporal.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-flat-volatile.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-global-lastuse.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-global-nontemporal.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-global-volatile.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-private-lastuse.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-private-nontemporal.ll
    M llvm/test/CodeGen/AMDGPU/memory-legalizer-private-volatile.ll
    M llvm/test/CodeGen/AMDGPU/preload-kernargs.ll
    M llvm/test/CodeGen/AMDGPU/spillv16.ll
    M llvm/test/CodeGen/AMDGPU/wait-before-stores-with-scope_sys.mir

  Log Message:
  -----------
  [AMDGPU][gfx1250] Add wait_xcnt before any access that cannot be repeated (#168852)

The xcnt wait is actually required before any memory access that can
only be done once, so atomic stores and volatile accesses are affected.
This patch also ensures buffer instructions are handled.



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