[PATCH] D155622: [X86] Recognize standalone `(1 << nbits) - 1` pattern as bzhi

[Danila Malyutin via Phabricator via llvm-commits]

danilaml created this revision.
Herald added subscribers: pengfei, hiraditya.
Herald added a project: All.
danilaml requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

This can be though as a subcase of `x & ((1 << nbits) - 1)` where x == -1

#Reviewers:

#Subscribers:


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D155622

Files:
  llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
  llvm/test/CodeGen/X86/extract-bits.ll
  llvm/test/CodeGen/X86/extract-lowbits.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D155622.541611.patch
Type: text/x-patch
Size: 20163 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20230718/fb429a32/attachment.bin>