Michael Gottesman 9326ef4d73 [upstream-update] Update LLVMPasses for new objc arc intrinsics. ...

We used to represent these just as normal LLVM functions, e.x.:

  declare objc_object* @objc_retain(objc_object*)
  declare void @objc_release(objc_object*)

Recently, special objc intrinsics were added to LLVM. This pass updates these
small (old) passes to use the new intrinsics.

This turned out to not be too difficult since we never create these
instructions. We only analyze them, move them, and delete them.

rdar://47852297

2019-02-08 14:22:57 -08:00

2.7 KiB

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