[PATCH] D142313: [PowerPC] Replace PPCISD::VABSD cases with generic ISD::ABDU(X,Y) node

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 492800.
RKSimon retitled this revision from "[PowerPC] Replace PPCISD::VABSD(X,Y,0) cases with generic ISD::ABDU(X,Y) node" to "[PowerPC] Replace PPCISD::VABSD cases with generic ISD::ABDU(X,Y) node".
RKSimon edited the summary of this revision.
RKSimon added a comment.

Adds support for ISD::ABDS for v4i32 types using the existing signbit flip trick and remove the PPCISD::VABSD node type entirely

I've tentatively removed the "(abs (sub a, b) --> (vabsd a b 1))" fold as afaict its not correct: https://alive2.llvm.org/ce/z/jc2hLU


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142313/new/

https://reviews.llvm.org/D142313

Files:
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.h
  llvm/lib/Target/PowerPC/PPCInstrVSX.td
  llvm/test/CodeGen/PowerPC/ppc64-P9-vabsd.ll

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