Nate Chandler 7ea336367d [NFC] Port isDeinitBarrier to Swift. ...

Added new C++-to-Swift callback for isDeinitBarrier.

And pass it CalleeAnalysis so it can depend on function effects.  For
now, the argument is ignored.  And, all callers just pass nullptr.

Promoted to API the mayAccessPointer component predicate of
isDeinitBarrier which needs to remain in C++.  That predicate will also
depends on function effects.  For that reason, it too is now passed a
BasicCalleeAnalysis and is moved into SILOptimizer.

Also, added more conservative versions of isDeinitBarrier and
maySynchronize which will never consider side-effects.

2022-10-18 21:23:22 -07:00

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