[all-commits] [llvm/llvm-project] 0b46b0: AMDGPU/GlobalISel: Fix incorrect VOP3P fneg folding

[Matt Arsenault via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 0b46b078b656eacaf8fb0b550825189a051f0744
      https://github.com/llvm/llvm-project/commit/0b46b078b656eacaf8fb0b550825189a051f0744
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2020-02-24 (Mon, 24 Feb 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.fdot2.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.sdot2.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.sdot4.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.sdot8.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.udot2.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.udot4.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.udot8.ll

  Log Message:
  -----------
  AMDGPU/GlobalISel: Fix incorrect VOP3P fneg folding

We use some s32 values in VOP3P operands, and won't see any
intervening casts from a 32-bit fneg. Make sure it's really a packed
fneg before folding.