[PATCH] D103291: [AArch64][GISel] and+or+shl => bfi

[Jon Roelofs via Phabricator via llvm-commits]

jroelofs created this revision.
jroelofs added reviewers: aemerson, paquette.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
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This fixes a GISEL vs SDAG regression that showed up at -Os in 256.bzip2

In `_getAndMoveToFrontDecode`:

gisel:

  and w9, w0, #0xff
  orr w9, w9, w8, lsl #8

sdag:

  bfi w0, w8, #8, #24


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103291

Files:
  llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/select-bitfield-insert.ll

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