Nikita Popov 2833c46f75 [DwarfEHPrepare] Don't prune unreachable resumes at optnone ...

Disable pruning of unreachable resumes in the DwarfEHPrepare pass
at optnone. While I expect the pruning itself to be essentially free,
this does require a dominator tree calculation, that is not used for
anything else. Saving this DT construction makes for a 0.4% O0
compile-time improvement.

Differential Revision: https://reviews.llvm.org/D80400

2020-05-23 20:58:01 +02:00

9.0 KiB

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