tree c2b8543fb6548962df374a48662ee8eb71bd2d6f
parent 93fe58c9cf532d8ddb166d8d00667707bc017ed7
author Austin Kerbow <Austin.Kerbow@amd.com> 1585549940 -0700
committer Austin Kerbow <Austin.Kerbow@amd.com> 1585874512 -0700

[AMDGPU] Handle SMRD signed offset immediate

Summary:
This fixes a few issues related to SMRD offsets. On gfx9 and gfx10 we have a
signed byte offset immediate, however we can overflow into a negative since we
treat it as unsigned.

Also, the SMRD SOFFSET sgpr is an unsigned offset on all subtargets. We
sometimes tried to use negative values here.

Third, S_BUFFER instructions should never use a signed offset immediate.

Differential Revision: https://reviews.llvm.org/D77082