[PATCH] D108925: [AMDGPU] enable scalar compare in truncate selection

[Alexander via Phabricator via llvm-commits]

alex-t created this revision.
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Currently, the truncate selection dag node is expanded as a bitwise AND plus compare to 1.  This change enables scalar comparison in the pattern if the truncate node is uniform.


https://reviews.llvm.org/D108925

Files:
  llvm/lib/Target/AMDGPU/SIInstructions.td
  llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-fold-binop-select.ll
  llvm/test/CodeGen/AMDGPU/cross-block-use-is-not-abi-copy.ll
  llvm/test/CodeGen/AMDGPU/llvm.amdgcn.div.fmas.ll
  llvm/test/CodeGen/AMDGPU/select-i1.ll
  llvm/test/CodeGen/AMDGPU/trunc.ll
  llvm/test/CodeGen/AMDGPU/wave32.ll

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