Erik Eckstein 4011e086f0 Swift optimizer: add Value.makeAvailable and `Value.copy(at:andMakeAvailableIn:) ...

Utilities to make a value available to be used in another basic block.
Inserts required `copy_value` and `destroy_value` operations in case the destination block is in a different control region than the value.
For example, if the destination block is in a loop while the value is not in that loop, the value has to be copied for each loop iteration.

2022-05-12 21:48:37 +02:00

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