[PATCH] D55602: AMDGPU/InsertWaitcnts: Update VGPR/SGPR bounds when brackets are merged

[Carl Ritson via Phabricator via llvm-commits]

critson created this revision.
critson added a reviewer: nhaehnle.
Herald added subscribers: llvm-commits, jfb, t-tye, tpr, dstuttard, yaxunl, wdng, jvesely, kzhuravl, arsenm.

Fix an issue where VGPR/SGPR bounds are not properly extended when brackets are merged.
This manifests as missing waitcnt insertions when multiple brackets are forwarded to a successor block and the first forward has lower VGPR/SGPR bounds.

Irreducible loop test has been extended based on a CTS failure detected for GFX9.


Repository:
  rL LLVM

https://reviews.llvm.org/D55602

Files:
  lib/Target/AMDGPU/SIInsertWaitcnts.cpp
  test/CodeGen/AMDGPU/waitcnt-loop-irreducible.mir

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D55602.177855.patch
Type: text/x-patch
Size: 3335 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20181212/e2acec78/attachment.bin>