[PATCH] D84108: [SimplifyCFG][LoopRotate] SimplifyCFG: disable common instruction hoisting by default, enable late in pipeline

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

> this does regress compile-time by +0.5% geomean (unsurprizingly)

FWIW, a large part of the regressions seems to come down to a single file that regresses big time:

> CMakeFiles/lencod.dir/context_ini.c.o 	3917M 	7067M (+80.41%)

Probably worth taking a look whether that can be mitigated.


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https://reviews.llvm.org/D84108