[Bug target/43884] [4.4/4.5/4.6 Regression] Performance degradation for simple fibonacci numbers calculation due to extra stack alignment

[hubicka at ucw dot cz]

------- Comment #6 from hubicka at ucw dot cz  2010-04-25 23:42 -------
Subject: Re:  [4.4/4.5/4.6 Regression] Performance
        degradation for simple fibonacci numbers calculation due to extra
        stack alignment

> where the only difference is different loop alignment and keeping the
> stack 16-bytes aligned.  Indeed we get the same speed as 4.1 when
> building with -mpreffered-stack-boundary=2.  Why do we bother to
> keep the stack aligned for leaf functions?
We should not.  Probably fallout of stack alignment patches? I will check out
later.

Honza


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43884