Nate Chandler 9861422eeb [SIL] Key consume checking off var_decl attr. ...

Previously, the lexical attribute on begin_borrow instructions was used.
This doesn't work for values without lexical lifetimes which are
consumed, e.g. stdlib CoW types.  Here, the new var_decl attribute on
begin_borrow is keyed off of instead.  This flag encodes exactly that a
value corresponds to a source-level VarDecl, which is the condition
under which checking needs to run.

rdar://118059326

2023-11-28 07:26:09 -08:00

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