[PATCH] D97334: AMDGPU: Remove special case in shouldCoalesce

[Matt Arsenault via Phabricator via llvm-commits]

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Unaligned registers are now constrained with classes, rather than
specially reserving a subset of the whole class.


https://reviews.llvm.org/D97334

Files:
  llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
  llvm/test/CodeGen/AMDGPU/coalesce-vgpr-alignment.ll
  llvm/test/CodeGen/AMDGPU/fp64-atomics-gfx90a.ll
  llvm/test/CodeGen/AMDGPU/global-atomics-fp.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.dim.gfx90a.ll

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