Michael Gottesman b1f69030fc [region-isolation] When assigning RValues into memory, use tuple_addr_constructor instead of doing it in pieces. ...

I also included changes to the rest of the SIL optimizer pipeline to ensure that
the part of the optimizer pipeline before we lower tuple_addr_constructor (which
is right after we run TransferNonSendable) work as before.

The reason why I am doing this is that this ensures that diagnostic passes can
tell the difference in between:

```
x = (a, b, c)
```

and

```
x.0 = a
x.1 = b
x.2 = c
```

This is important for things like TransferNonSendable where assigning over the
entire tuple element is treated differently from if one were to initialize it in
pieces using projections.

rdar://117880194

2023-11-07 15:38:33 -08:00

2.7 KiB

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