[PATCH] D54882: [AMDGPU] Add sdwa support for ADD|SUB U64 decomposed Pseudos

[Ron Lieberman via Phabricator via llvm-commits]

ronlieb updated this revision to Diff 175587.
ronlieb added a comment.

latest approach: transform the pair of ADDs/SUBs into e32, and tighten up check on def/use from one ADD to the other.

MIR test still pending.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D54882/new/

https://reviews.llvm.org/D54882

Files:
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIPeepholeSDWA.cpp
  test/CodeGen/AMDGPU/sdwa-op64-test.ll

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