[SR-3735] Audit of existing runtime functions

[ematejska]

Previous ID	SR-3735
Radar	rdar://problem/23306602
Original Reporter	@ematejska
Type	Task
Status	Resolved
Resolution	Done

Additional Detail from JIRA

Votes	0
Component/s
Labels	Task, AffectsABI
Assignee	@gparker42
Priority	Medium

md5: e8322f29848b43de18ed3689d4d43a2b

Issue Description:

Ahead of ABI stability, every existing runtime function will need to be audited for its desirability and behavior.

For every function, we need to evaluate whether we want the API as is:

• If yes, then we need to precisely specify the semantics and guarantees of the API.

• If not, we need to either change, remove, or replace the API, and precisely specify the new semantics.

[bob-wilson]

@swift-ci create

[gparker42]

Prerequisite: SR-6209 Allow @_silgen_name to create a hidden symbol
because otherwise @_silgen_name creates unwanted exported symbols.

[bob-wilson]

Greg has completed an audit of the runtime APIs. He made a number of changes, including:

#12853

#12988

#13005

#13202

#13230

Things look pretty good now except for:

• undesirable exports to support excessive @_inlineable (rdar://35863717)

• scrapping the old Mirror machinery (rdar://20356017)