[all-commits] [llvm/llvm-project] 037926: [AMDGPU] Fix width check for signed mul24 generation.

[Abinav Puthan Purayil via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0379263f23a667ff5823c96a3e5819f65eadd243
      https://github.com/llvm/llvm-project/commit/0379263f23a667ff5823c96a3e5819f65eadd243
  Author: Abinav Puthan Purayil <abinav.puthanpurayil at amd.com>
  Date:   2021-10-15 (Fri, 15 Oct 2021)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
    M llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-mul24.ll

  Log Message:
  -----------
  [AMDGPU] Fix width check for signed mul24 generation.

This changes fixes a case in which the highest set bit of the original
result is at bit 31 and sign-extending the mul24 for it would make the
result negative.

Differential Revision: https://reviews.llvm.org/D111823