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Re: [PATCH] Fix PR54489 - FRE needing AVAIL_OUT


On Wed, Sep 12, 2012 at 4:02 PM, Richard Guenther wrote:
> for a followup (and I bet sth else than PRE blows up at -O2 as well).

Actually, the only thing that really blows up is that enemy of scalability, VRP.

With -O2 -fno-tree-{pre,fre,vrp}, the slowest part of the compiler on
this test case are dominance computation, dominator-based
optimization, and tree CFG cleanup, but they all scale linearly with
the number of X'es in the test case :-)

Ciao!
Steven


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