[PATCH] D95503: [AMDGPU] WQM/WWM: Fix marking of partial definitions

[Carl Ritson via Phabricator via llvm-commits]

critson created this revision.
critson added reviewers: piotr, foad, rampitec.
Herald added subscribers: kerbowa, hiraditya, t-tye, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl, arsenm.
critson requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
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Track lanes when processing definitions for marking WQM/WWM.
If all lanes have been defined then marking can stop.
This prevents marking unnecessary instructions as WQM/WWM.

In particular this fixes a bug where values passing through
V_SET_INACTIVE would me marked as requiring WWM.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D95503

Files:
  llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp
  llvm/test/CodeGen/AMDGPU/wqm.mir

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