[all-commits] [llvm/llvm-project] 8e5f6d: [AMDGPU] Remove redundant s_cmp_lg_* sX, 0 (#162352)

[LU-JOHN via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8e5f6dd37cc7d5312a00c24af42026d239c1e9f8
      https://github.com/llvm/llvm-project/commit/8e5f6dd37cc7d5312a00c24af42026d239c1e9f8
  Author: LU-JOHN <John.Lu at amd.com>
  Date:   2025-10-18 (Sat, 18 Oct 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.h
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.ballot.i32.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.ballot.i64.ll
    M llvm/test/CodeGen/AMDGPU/addsub64_carry.ll
    M llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-idiv.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_buffer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_global_pointer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_local_pointer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_raw_buffer.ll
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_struct_buffer.ll
    M llvm/test/CodeGen/AMDGPU/carryout-selection.ll
    M llvm/test/CodeGen/AMDGPU/ctlz_zero_undef.ll
    M llvm/test/CodeGen/AMDGPU/ctpop16.ll
    M llvm/test/CodeGen/AMDGPU/expand-scalar-carry-out-select-user.ll
    M llvm/test/CodeGen/AMDGPU/fcopysign.f16.ll
    M llvm/test/CodeGen/AMDGPU/fptrunc.f16.ll
    M llvm/test/CodeGen/AMDGPU/fptrunc.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fadd.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fmax.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fmin.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_scan_fsub.ll
    M llvm/test/CodeGen/AMDGPU/insert-delay-alu-bug.ll
    M llvm/test/CodeGen/AMDGPU/local-atomicrmw-fadd.ll
    M llvm/test/CodeGen/AMDGPU/optimize-compare.mir
    M llvm/test/CodeGen/AMDGPU/s_cmp_0.ll
    M llvm/test/CodeGen/AMDGPU/s_uaddo_usubo_pseudo.ll
    M llvm/test/CodeGen/AMDGPU/sdiv64.ll
    M llvm/test/CodeGen/AMDGPU/srem.ll
    M llvm/test/CodeGen/AMDGPU/srem64.ll
    M llvm/test/CodeGen/AMDGPU/uaddo.ll
    M llvm/test/CodeGen/AMDGPU/udiv64.ll
    M llvm/test/CodeGen/AMDGPU/urem64.ll
    M llvm/test/CodeGen/AMDGPU/usubo.ll
    M llvm/test/CodeGen/AMDGPU/wave32.ll
    M llvm/test/CodeGen/AMDGPU/workitem-intrinsic-opts.ll

  Log Message:
  -----------
  [AMDGPU] Remove redundant s_cmp_lg_* sX, 0  (#162352)

Remove redundant s_cmp_lg_* sX, 0 if SALU instruction already sets SCC
if sX!=0.

---------

Signed-off-by: John Lu <John.Lu at amd.com>



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