[PATCH] D128216: [X86] Add SimplifyMultipleUseDemandedBitsForTargetNode X86ISD::ANDNP handling

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: craig.topper, spatel, pengfei.
Herald added subscribers: jsji, armkevincheng, eric-k256, StephenFan, hiraditya.
Herald added a reviewer: sjarus.
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RKSimon requested review of this revision.
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See if we can remove X86ISD::ANDNP nodes by checking the state of the knownbits of the demanded elements.

This is equivalent to the generic ISD::AND handling, but flips the bits of the LHS operand to account for ANDNP.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128216

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/combine-udiv.ll
  llvm/test/CodeGen/X86/fpclamptosat_vec.ll
  llvm/test/CodeGen/X86/masked_store_trunc_usat.ll
  llvm/test/CodeGen/X86/psubus.ll
  llvm/test/CodeGen/X86/udiv_fix_sat.ll
  llvm/test/CodeGen/X86/vector-interleaved-load-i16-stride-5.ll
  llvm/test/CodeGen/X86/vector-trunc-usat.ll

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