[PATCH] D112644: [AMDGPU] Fix global isel for kernels using agprs on gfx90a

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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With Global ISel getReservedRegs() is called before function is
regbank selected for the first time. Defer caching of usesAGPRs()
in this case.


https://reviews.llvm.org/D112644

Files:
  llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.mfma.gfx90a.ll

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