[PATCH] D129933: [DAG] SimplifyDemandedBits - relax "xor (X >> ShiftC), XorC --> (not X) >> ShiftC" to match only demanded bits

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 445491.
RKSimon added a comment.

Hide the fold behind a isDesirableToCommuteXorWithShift TLI override (default - true)


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D129933/new/

https://reviews.llvm.org/D129933

Files:
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMISelLowering.h
  llvm/test/CodeGen/Mips/bittest.ll
  llvm/test/CodeGen/RISCV/bittest.ll
  llvm/test/CodeGen/X86/speculative-load-hardening.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D129933.445491.patch
Type: text/x-patch
Size: 18292 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20220718/c46fa59f/attachment.bin>