Jamie 1f3f830fc7 [SILOptimizer]: slow OSSA lifetime canonicalization mitigation ...

OSSA lifetime canonicalization can take a very long time in certain
cases in which there are large basic blocks. to mitigate this, add logic
to skip walking the liveness boundary for extending liveness to dead
ends when there aren't any dead ends in the function.

Updates `DeadEndBlocks` with a new `isEmpty` method and cache to
determine if there are any dead-end blocks in a given function.

2025-06-18 17:52:14 -05:00

21 KiB

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