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[Bug c++/35117] Vectorization on power PC
- From: "dberlin at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Feb 2008 16:29:25 -0000
- Subject: [Bug c++/35117] Vectorization on power PC
- References: <bug-35117-15734@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #29 from dberlin at gcc dot gnu dot org 2008-02-11 16:29 -------
Vectorization is not magic.
I'm also not sure where you got the idea that vectorization = magic speedup
There is no real "expected performance gain" on memory bound applications
because the processor spends all of it's time waiting on the memory subsystem,
not calculating things.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35117