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Re: using non-standard optflags (-O3, in particular)



On Friday 09 February 2007 18:24, Ralf Corsepius wrote:

> There are reasons why certain optimizations are in -O3 and why they are
> not in -O2, e.g. because some of them do not provide sufficient
> performance gains, some of them because they are too architecture
> specific, some of them because they are unsafe, some of them because
> they are considered unstable/experimental.

According to the gcc manpage -O3 enables only three more optimizationes 
than -O3 does:

-finline-functions
-funswitch-loops
-fgcse-after-reload

Are all of them bad or is there more optimization done than is described 
there?

Regards,
Till

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