[PATCH] AMDGPU/SI: select S_ABS_I32 when possible (v2)

[Marek Olšák via llvm-commits]

Ping.

On Thu, Oct 29, 2015 at 4:44 PM, Marek Olšák <maraeo at gmail.com> wrote:
> From: Marek Olšák <marek.olsak at amd.com>
>
> v2: added more tests, moved the SALU->VALU conversion to a separate function
>
> It looks like it's not possible to get subregisters in the S_ABS lowering
> code, and I don't feel like guessing without testing what the correct code
> would look like.
> ---
>  lib/Target/AMDGPU/SIInstrInfo.cpp      |  29 ++++++
>  lib/Target/AMDGPU/SIInstrInfo.h        |   3 +
>  lib/Target/AMDGPU/SIInstructions.td    |   5 ++
>  test/CodeGen/AMDGPU/llvm.AMDGPU.abs.ll |   4 +-
>  test/CodeGen/AMDGPU/sminmax.ll         | 156 +++++++++++++++++++++++++++++++++
>  5 files changed, 194 insertions(+), 3 deletions(-)
>  create mode 100644 test/CodeGen/AMDGPU/sminmax.ll