[PATCH] D103334: [GISel] Eliminate redundant bitmasking

[Jon Roelofs via Phabricator via llvm-commits]

jroelofs created this revision.
jroelofs added reviewers: aemerson, paquette, arsenm.
Herald added subscribers: kerbowa, hiraditya, kristof.beyls, nhaehnle, jvesely.
jroelofs requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

This was a GISel vs SDAG regression that showed up at -Os in:
SingleSource/Benchmarks/Adobe-C++/simple_types_constant_folding.test on aarch64

https://llvm.godbolt.org/z/aecjodsjG


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103334

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/opt-overlapping-and.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/shl-ext-reduce.ll

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