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5 Commits

Author SHA1 Message Date
Matt Arsenault ad55ee5869 AMDGPU: Don't required structured CFG 
The structured CFG is just an aid to inserting exec
mask modification instructions, once that is done
we don't really need it anymore. We also
do not analyze blocks with terminators that
modify exec, so this should only be impacting
true branches.

llvm-svn: 288744
 2016-12-06 01:02:51 +00:00
Tom Stellard 0bc688116c AMDGPU/SI: Avoid moving PHIs to VALU when phi values are defined in scalar branches 
Reviewers: arsenm

Subscribers: arsenm, llvm-commits, kzhuravl

Differential Revision: https://reviews.llvm.org/D23417

llvm-svn: 288095
 2016-11-29 00:46:46 +00:00
Matt Arsenault 4945905f5f AMDGPU: Handle cbranch vccz/vccnz 
llvm-svn: 270297
 2016-05-21 00:29:40 +00:00
Matt Arsenault 6d09380532 AMDGPU: Implement AnalyzeBranch 
Original patch by Tom Stellard

llvm-svn: 270295
 2016-05-21 00:29:27 +00:00
Matt Arsenault 887d4767b7 AMDGPU: Add test for m0 initialization in basic loop 
Initialization of m0 is emitted for each LDS operation, so
every block with LDS usage ends up with one. MachineLICM
used to fail to hoist this out of the loop, so every loop
iteration with LDS usage in it would re-initialize it.

This seems to be fixed now, so add a test to make sure that
it stays this way.

llvm-svn: 266156
 2016-04-13 00:39:52 +00:00