If receiver is captured, the variable is duplicated so top-level
members can access receiver as a local variable.
This is more efficient and allows uses of receiver in the prologue of
top-level member, before context is allocated and receiver is copied to
the context.
Change-Id: I5b13f692767c3aa445e558bff2bc3f8fbf016561
Reviewed-on: https://dart-review.googlesource.com/71431
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Alexander Markov
1b89c785e1