Erik Eckstein d4a6bd39b6 SILOptimizer: improve MemBehavior for apply instructions. ...

1. Do a better alias analysis for "function-local" objects, like alloc_stack and inout parameters
2. Fully support try_apply and begin/end/abort_apply

So far we fully relied on escape analysis. But escape analysis has some shortcomings with SIL address-types.
Therefore, handle two common cases, alloc_stack and inout parameters, with alias analysis.
This gives better results.
The biggest change here is to do a quick check if the address escapes via an address_to_pointer instructions.

2020-10-09 20:54:58 +02:00

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