[all-commits] [llvm/llvm-project] c7189b: [AMDGPU] Use explicit carry nodes for i64 wide int...

[Shilei Tian via All-commits]

  Branch: refs/heads/users/shiltian/explicit-carry
  Home:   https://github.com/llvm/llvm-project
  Commit: c7189bad7fadbdccad5520942a06d6c3f15d083c
      https://github.com/llvm/llvm-project/commit/c7189bad7fadbdccad5520942a06d6c3f15d083c
  Author: Shilei Tian <i at tianshilei.me>
  Date:   2026-06-18 (Thu, 18 Jun 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/test/CodeGen/AMDGPU/a-v-flat-atomicrmw.ll
    M llvm/test/CodeGen/AMDGPU/a-v-global-atomicrmw.ll
    M llvm/test/CodeGen/AMDGPU/addsub64_carry.ll
    M llvm/test/CodeGen/AMDGPU/carryout-selection.ll
    M llvm/test/CodeGen/AMDGPU/dag-divergence.ll
    M llvm/test/CodeGen/AMDGPU/div_i128.ll
    M llvm/test/CodeGen/AMDGPU/div_v2i128.ll
    M llvm/test/CodeGen/AMDGPU/flat-saddr-atomics.ll
    M llvm/test/CodeGen/AMDGPU/flat_atomics_i64.ll
    M llvm/test/CodeGen/AMDGPU/flat_atomics_i64_noprivate.ll
    M llvm/test/CodeGen/AMDGPU/flat_atomics_i64_system.ll
    M llvm/test/CodeGen/AMDGPU/flat_atomics_i64_system_noprivate.ll
    M llvm/test/CodeGen/AMDGPU/global_atomics_i64_system.ll
    A llvm/test/CodeGen/AMDGPU/i128-add-carry-chain.ll
    M llvm/test/CodeGen/AMDGPU/itofp.i128.bf.ll
    M llvm/test/CodeGen/AMDGPU/itofp.i128.ll
    M llvm/test/CodeGen/AMDGPU/mad_64_32.ll
    M llvm/test/CodeGen/AMDGPU/rem_i128.ll
    M llvm/test/CodeGen/AMDGPU/uaddo.ll
    M llvm/test/CodeGen/AMDGPU/usubo.ll

  Log Message:
  -----------
  [AMDGPU] Use explicit carry nodes for i64 wide integer lowering

This PR switches widened i64 add/sub lowering to use explicit UADDO/USUBO carry
nodes instead of glue-based carry chains.



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