Arnold Schwaighofer f664b16010 SIL: Add an on stack version of partial_apply ...

It does not take ownership of its non-trivial arguments, is a trivial
function type and therefore must not be destroyed. The compiler must
make sure to extend the lifetime of non-trivial arguments beyond the
last use of the closure.

  %objc = copy_value %0 : $AnObject
  %closure = partial_apply [stack] [callee_guaranteed] %16(%obj) : $@convention(thin) (@guaranteed AnObject) -> ()
  %closure2 = mark_dependence %closure : $@noescape @callee_guaranteed () -> () on %obj : $AnObject
  %user = function_ref @useClosure : $@convention(thin) (@noescape @callee_guaranteed () -> ()) -> ()
  apply %user(%closure2) : $@convention(thin) (@noescape @callee_guaranteed () -> ()) -> ()
  dealloc_stack %closure : $() ->()
  destroy_value %obj : $AnObject // noescape closure does not take ownership

SR-904
rdar://35590578

2019-01-15 11:20:33 -08:00

3.5 KiB

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