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Re: [tree-ssa] bnw-simple-branch now usable
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: Diego Novillo <dnovillo at redhat dot com>
- Cc: Jason Merrill <jason at redhat dot com>, Daniel Berlin <dberlin at dberlin dot org>, Richard Henderson <rth at redhat dot com>, Ben Elliston <bje at redhat dot com>, "Frank Ch. Eigler" <fche at redhat dot com>, Gabriel Dos Reis <gdr at codesourcery dot com>, Pop Sébastian <pop at gauvain dot u-strasbg dot fr>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Date: Thu, 12 Sep 2002 11:44:09 -0400
- Subject: Re: [tree-ssa] bnw-simple-branch now usable
>>>>> Diego Novillo writes:
Diego> The idea was not so much address performance problems but make the tree
Diego> IR a bit more reasonable (especially the C one). From what I
Diego> understand, the new IR should not have any performance impact, but
Diego> that's easy to track. We keep track of bootstrap and SPEC build times
Diego> in the SPEC95 page at
Diego> http://people.redhat.com/dnovillo/SPEC/tree-ssa-branch/
I am not asking that the branch *address* performance problems,
but the new functionality should be designed and implemented with
performance in mind. This work is intended for a production compiler, not
a research compiler. If it degrades the compilation speed of GCC and has
a greater cost than equivalent functionality in other production
compilers, it has less chance of ever being merged into GCC.
David