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Re: Patch to improve flow dead code removal


My shoot from the hip guess as to why this patch introduced
regressions is try_optimize_cfg is creating a new BB without
setting up global_live_at_start and global_live_at_end.  This
problem came and went during patch development / testing as
Jan Hubicka checked in changes.

I'm continuing to dig.

-- John
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|    John Wehle    |     Fax: 1-215-540-5495  |                         |
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