[PATCH] D83948: [PowerPC] Custom lowering for funnel shifts

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
foad added reviewers: hfinkel, RKSimon.
Herald added subscribers: llvm-commits, steven.zhang, shchenz, kbarton, hiraditya, nemanjai.
Herald added a project: LLVM.

The custom lowering saves an instruction over the generic expansion, by
taking advantage of the fact that PowerPC shift instructions are well
defined in the shift-by-bitwidth case.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D83948

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.h
  llvm/test/CodeGen/PowerPC/funnel-shift.ll
  llvm/test/CodeGen/PowerPC/ppcf128-endian.ll
  llvm/test/CodeGen/PowerPC/pr44183.ll
  llvm/test/CodeGen/PowerPC/smulfixsat.ll
  llvm/test/CodeGen/PowerPC/umulfixsat.ll

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