[PATCH] D121360: [AMDGPU] Enable divergence predicates for negative inline constant subtraction

[Alexander via Phabricator via llvm-commits]

alex-t created this revision.
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We have a pattern that undo sub x, c -> add x, -c canonicalization since c is more likely
 an inline immediate than -c. This patch enables it to select scalar or vector subtracion by the input node divergence.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121360

Files:
  llvm/lib/Target/AMDGPU/SIInstructions.td
  llvm/test/CodeGen/AMDGPU/divergence-driven-negsubinlineconst.ll
  llvm/test/CodeGen/AMDGPU/shift-i128.ll

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