Fix asymptotic performance issues in live variables analysis. #78
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Fix possibly-exponential runtime for DFS graph searches. Improve DFA fixpoint algorithm to correctly compute worklist of only changed nodes for each iteration. Added test that takes > 2 minutes to compile without these improvements.
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Thanks! I'm resubmitting this to the 2.10.x branch. |
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Fix possibly-exponential runtime for DFS graph searches. Improve DFA fixpoint algorithm to correctly compute worklist of only changed nodes for each iteration.
Added test that takes > 2 minutes to compile without these improvements.