[all-commits] [llvm/llvm-project] d7929b: [AMDGPU] Lower uniform uaddsat to SALU instructions

Anshil Gandhi via All-commits all-commits at lists.llvm.org
Thu Jul 16 18:44:25 PDT 2026


  Branch: refs/heads/users/gandhi56/amdgpu-isel/uaddsat-i16-gcnpat
  Home:   https://github.com/llvm/llvm-project
  Commit: d7929b087065dddbb48d812624d35f923b49aa9f
      https://github.com/llvm/llvm-project/commit/d7929b087065dddbb48d812624d35f923b49aa9f
  Author: Anshil Gandhi <Anshil.Gandhi at amd.com>
  Date:   2026-07-16 (Thu, 16 Jul 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SOPInstructions.td
    M llvm/test/CodeGen/AMDGPU/GlobalISel/uaddsat.ll
    M llvm/test/CodeGen/AMDGPU/uaddsat.ll

  Log Message:
  -----------
  [AMDGPU] Lower uniform uaddsat to SALU instructions

Map uniform uaddsat.i16(i16 a, i16 b) to the following:

```
s_and_b32 s2, s0, 0xffff    ; s0 = i16 a
s_and_b32 s3, s1, 0xffff    ; s1 = i16 b
s_add_i32 s4, s3, s2
s_min_u32 s5, s4, 0xffff
```



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