[PATCH] D90349: [DAGCombiner] Improve shift by select of constant

[Layton Kifer via Phabricator via llvm-commits]

laytonio created this revision.
laytonio added reviewers: craig.topper, lebedev.ri, spatel, RKSimon.
Herald added subscribers: llvm-commits, ecnelises, pengfei, hiraditya, nemanjai.
Herald added a project: LLVM.
laytonio requested review of this revision.

Clean up a TODO, to support folding a shift of a constant by a select of constants, on targets with different shift operand sizes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90349

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/test/CodeGen/AArch64/select_const.ll
  llvm/test/CodeGen/PowerPC/select_const.ll
  llvm/test/CodeGen/X86/dagcombine-select.ll

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