[PATCH] D157599: [AMDGPU] Do not release VGPRs at -O0

[Jay Foad via Phabricator via llvm-commits]

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This was an oversight when the GFX11 early release VGPRs optimization
was reimplemented in D153279 <https://reviews.llvm.org/D153279>.

Sending the DEALLOC_VGPRS message is a performance optimization so there
is no need to do it at -O0. In addition it makes some kinds of post
mortem debugging hard or impossible, since VGPR values are no longer
available to inspect at the s_endpgm instruction.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157599

Files:
  llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
  llvm/test/CodeGen/AMDGPU/release-vgprs.mir

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