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7 Commits

Author SHA1 Message Date
Carl Ritson 3a18665748 [AMDGPU] Translate s_and/s_andn2 to s_mov in vcc optimisation 
When SCC is dead, but VCC is required then replace s_and / s_andn2
with s_mov into VCC when mask value is 0 or -1.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D83850
 2020-07-17 11:48:57 +09:00
Carl Ritson 674226126d [AMDGPU] Apply pre-emit s_cbranch_vcc optimation to more patterns 
Add handling of s_andn2 and mask of 0.
This eliminates redundant instructions from uniform control flow.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D83641
 2020-07-15 11:02:35 +09:00
Jonathan Roelofs 7c5d2bec76 [llvm] Fix missing FileCheck directive colons 
https://reviews.llvm.org/D77352
 2020-04-06 09:59:08 -06:00
cdevadas ce984129ea [AMDGPU] Add SIPreEmitPeephole pass. 
This pass can handle all the optimization
opportunities found just before code emission.
Presently it includes the handling of vcc branch
optimization that was handled earlier in SIInsertSkips.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D76712
 2020-03-25 15:35:35 +00:00
Stanislav Mekhanoshin 0846c125f9 [AMDGPU] gfx1010 core wave32 changes 
Differential Revision: https://reviews.llvm.org/D63204

llvm-svn: 363934
 2019-06-20 15:08:34 +00:00
David Stuttard 20ea21c6ed [AMDGPU] Add support for immediate operand for S_ENDPGM 
Summary:
Add support for immediate operand in S_ENDPGM

Change-Id: I0c56a076a10980f719fb2a8f16407e9c301013f6

Reviewers: alexshap

Subscribers: qcolombet, arsenm, kzhuravl, jvesely, wdng, nhaehnle, yaxunl, tpr, t-tye, eraman, arphaman, Petar.Avramovic, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59213

llvm-svn: 355902
 2019-03-12 09:52:58 +00:00
Stanislav Mekhanoshin e86c8d33b1 [AMDGPU] Optimize S_CBRANCH_VCC[N]Z -> S_CBRANCH_EXEC[N]Z 
Sometimes after basic block placement we end up with a code like:

  sreg = s_mov_b64 -1
  vcc = s_and_b64 exec, sreg
  s_cbranch_vccz

This happens as a join of a block assigning -1 to a saved mask and
another block which consumes that saved mask with s_and_b64 and a
branch.

This is essentially a single s_cbranch_execz instruction when moved
into a single new basic block.

Differential Revision: https://reviews.llvm.org/D54164

llvm-svn: 346690
 2018-11-12 18:48:17 +00:00