Commit Graph

6 Commits

Author SHA1 Message Date
Stanislav Mekhanoshin a6322941ff [AMDGPU] gfx1010 VMEM and SMEM implementation
Differential Revision: https://reviews.llvm.org/D61330

llvm-svn: 359621
2019-04-30 22:08:23 +00:00
Mark Searles 76c5b62988 Revert "AMDGPU: Split block for si_end_cf"
This reverts commit 7a6ef3004655dd86d722199c471ae78c28e31bb4.

We discovered some internal test failures, so reverting for now.

Differential Revision: https://reviews.llvm.org/D61213

llvm-svn: 359363
2019-04-27 00:51:18 +00:00
Matt Arsenault 396653f8a1 AMDGPU: Split block for si_end_cf
Relying on no spill or other code being inserted before this was
precarious. It relied on code diligently checking isBasicBlockPrologue
which is likely to be forgotten.

Ideally this could be done earlier, but this doesn't work because of
phis. Any other instruction can't be placed before them, so we have to
accept the position being incorrect during SSA.

This avoids regressions in the fast register allocator rewrite from
inverting the direction.

llvm-svn: 357634
2019-04-03 20:53:20 +00:00
Matt Arsenault a353fd572a AMDGPU: Make exec mask optimzations more resistant to block splits
Also improve the check for SALU instructions to also ignore
implicit_def and other fake instructions.

llvm-svn: 357170
2019-03-28 14:01:39 +00:00
Matt Arsenault 4d47ac3b30 AMDGPU: Add additional MIR tests for exec mask optimizations
Also includes one example of how this transform is unsound. This isn't
verifying the copies are used in the control flow intrinisic patterns.

Also add option to disable exec mask opt pass. Since this pass is
unsound, it may be useful to turn it off until it is fixed.

llvm-svn: 357091
2019-03-27 16:58:30 +00:00
Matt Arsenault 4ab28b64b4 AMDGPU: Skip debug_instr when collapsing end_cf
Based on how these are inserted, I doubt this was causing a problem in
practice.

llvm-svn: 357090
2019-03-27 16:58:27 +00:00