[all-commits] [llvm/llvm-project] 1b02f5: [AMDGPU] Rework dot4 signedness checks (#68757)

[Jeffrey Byrnes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1b02f594b337618e2e5808a33620eeac19d10e06
      https://github.com/llvm/llvm-project/commit/1b02f594b337618e2e5808a33620eeac19d10e06
  Author: Jeffrey Byrnes <jeffrey.byrnes at amd.com>
  Date:   2023-11-30 (Thu, 30 Nov 2023)

  Changed paths:
    M llvm/include/llvm/CodeGen/ByteProvider.h
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/test/CodeGen/AMDGPU/idot4u.ll

  Log Message:
  -----------
  [AMDGPU] Rework dot4 signedness checks (#68757)

Using the known/unknown value of the sign bit, reason about the signedness version of the dot4 instruction.