------- Comment #12 from bangerth at math dot tamu dot edu 2006-12-14 16:08
-------
Subject: Re: gcc doesn't unroll nested loops
> Very interesting, thanks... so does it mean that gcc did loop unrolling after
> all? (sorry, I'm a newbie when it comes to compiler/assembler stuff).
Yes.
> And the speed difference was only caused by the compiler understanding that it
> didn't need to loop 100,000,000 times?
Yes. However, all this is only for my reduced testcase without the use of
the C++ class. For the original testcase, the issues Andrew P. identified
are still true.
W.
-------------------------------------------------------------------------
Wolfgang Bangerth email: [EMAIL PROTECTED]
www: http://www.math.tamu.edu/~bangerth/
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30201
