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Re: intent in cfg_layout_initialize
> passing CLEANUP_UPDATE_LIFE would work.
> You get the liveness invalidated when entering to cfglayout before
> sched2, right?
The problem shows up in 33.bbro. Some conditional jumps are deleted,
but the life info for the register it's testing isn't updated or
propogated.
> I think best fix is to simply add parameter of cfglayout_initialize
> specifying whether the liveness shall be preserved, as for tracer
> the cfglayout_initialize is called before liveness is built.
The one that I'm seeing is the call from the start of
reorder_basic_blocks().