[PATCH] D48130: [AtomicExpandPass]: Add a hook for custom cmpxchg expansion in IR

Wed Jun 13 08:18:45 PDT 2018

asb created this revision.
asb added a reviewer: jyknight.
Herald added a reviewer: javed.absar.
Herald added a subscriber: kristof.beyls.

This involves changing the shouldExpandAtomicCmpXchgInIR interface, but I have updated the in-tree backends using this hook (ARM, AArch64, Hexagon) so they will see no functional change.

Posting to allow discussion of the full patch series in my associated RFC (to be posted as soon as I've finished uploading this patch series). We may want to change the interface to allow greater code reuse across targets.

https://reviews.llvm.org/D48130

Files:
  include/llvm/CodeGen/TargetLowering.h
  lib/CodeGen/AtomicExpandPass.cpp
  lib/Target/AArch64/AArch64ISelLowering.cpp
  lib/Target/AArch64/AArch64ISelLowering.h
  lib/Target/ARM/ARMISelLowering.cpp
  lib/Target/ARM/ARMISelLowering.h
  lib/Target/Hexagon/HexagonISelLowering.cpp
  lib/Target/Hexagon/HexagonISelLowering.h

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