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r213090
2016 Mar 09
2
Where is the time going? - update
Further to my previous email, I now have some answers. The culprit is the
IR verifier.
1. opt -time-passes does not report time spent in the IR verifier.
If I add -disable-verify, opt's run time drops from 71 seconds to 37
seconds.
2. -disable-verify doesn't disable all verification runs.
The IR verifier is run 3 times: once prior to any optimization work, once
between running the