[PATCH] D146121: [DAG] Move lshr narrowing from visitANDLike to SimplifyDemandedBits (WIP)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon marked an inline comment as not done.
RKSimon added inline comments.


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Comment at: llvm/test/CodeGen/X86/bswap.ll:232
+; CHECK64-NEXT:    shlq $8, %rax
+; CHECK64-NEXT:    orq %rcx, %rax
 ; CHECK64-NEXT:    retq
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This looks to be the last regression - MatchBSwapHWordLow is very pattern specific, and can't peek through zext (or ignore AND masks for known zero bits)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146121/new/

https://reviews.llvm.org/D146121