[all-commits] [llvm/llvm-project] 7ea9ed: [AMDGPU] Fold a constant add/sub into the sudot4/s...

[Harrison Hao via All-commits]

  Branch: refs/heads/users/harrisonGPU/sudot-constant-fold-instcombine
  Home:   https://github.com/llvm/llvm-project
  Commit: 7ea9ed0efa5dc9fe8a3821569209a15039316740
      https://github.com/llvm/llvm-project/commit/7ea9ed0efa5dc9fe8a3821569209a15039316740
  Author: Harrison Hao <tsworld1314 at gmail.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
    M llvm/test/Transforms/InstCombine/AMDGPU/llvm.amdgcn.sudot.ll

  Log Message:
  -----------
  [AMDGPU] Fold a constant add/sub into the sudot4/sudot8 accumulator

Fold a constant add into the accumulator operand of sudot4 and sudot8 when
clamping is disabled:
```
  sudot(a, b, C1, false) + C2 -> sudot(a, b, C1 + C2, false)
```
Subtraction by a constant is canonicalized to addition of its negation.


  Commit: b9047800c3b0a33ed6c4b44b4a3c9e9dd1577670
      https://github.com/llvm/llvm-project/commit/b9047800c3b0a33ed6c4b44b4a3c9e9dd1577670
  Author: Harrison Hao <tsworld1314 at gmail.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

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

  Log Message:
  -----------
  Update for comments


  Commit: a6e1f0e625e648746d2a999a8f8fe03a86fde2e3
      https://github.com/llvm/llvm-project/commit/a6e1f0e625e648746d2a999a8f8fe03a86fde2e3
  Author: Harrison Hao <tsworld1314 at gmail.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

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

  Log Message:
  -----------
  Update again


Compare: https://github.com/llvm/llvm-project/compare/db16db9eadaf...a6e1f0e625e6

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