[PATCH] D148438: [AMDGPU] Allow AGPR hi16 regs in AMDGPUResourceUsageAnalysis

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

An alternative would be to fix/optimize the branch folder. Currently BranchFolder::mergeCommonTails adds IMPLICIT_DEFs based on the regs computed by LivePhysRegs:computeLiveIns before calling addLiveIns, which means it lacks the "Skip the register if we are about to add one of its super registers" optimization from addLiveIns and adds redundant IMPLICIT_DEFs of subregs. But I haven't found a neat way to implement this yet.


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D148438