Erik Eckstein f7296ed903 SIL: fix bugs in the MemBehavior cache invalidation mechanism. ...

When a non-value instruction (e.g. a destroy_addr) was deleted, the corresponding cache entry in MemoryBehaviorCache was not invalidated.
If a new instruction was allocated at the same memory location, the old - and invalid - cache entry was re-used.

This bug triggered a SIL memory lifetime failure in TempRValueElimination.

https://bugs.swift.org/browse/SR-13985
rdar://problem/72614608

This change also fixes another problem (which I found by inspection): Individual result values of MultipleValueInstructions were not invalidated correctly.

2021-01-06 11:29:57 +01:00

4.8 KiB

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