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Re: Loop optimizations

From: Aurelien Buhrig <aurelien dot buhrig dot gcc at gmail dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Wed, 20 Jul 2011 17:53:20 +0200
Subject: Re: Loop optimizations
References: <CAJ-J9_Wup63V0guPJ+kttOCc-CM=fBrsXvsCHbRdFzuapfvVvQ@mail.gmail.com> <mcrhb6iw6an.fsf@coign.corp.google.com> <CAJ-J9_VG7tRoOJHj-64tKzgqRXhY_NCRgA0=ff4RUV+RQKQ3hQ@mail.gmail.com> <mcrpql557gh.fsf@coign.corp.google.com>

2011/7/20 Ian Lance Taylor <iant@google.com>:
> Aurelien Buhrig <aurelien.buhrig.gcc@gmail.com> writes:
>
>> And generally speaking, is the tree generation influenced by the RTL
>> description in any way ?
>
> Yes, the loop optimizer uses RTL costs to select code sequences.

OK, I will check my rtx cost...
BTW, should the cost of RTXs depend on optimize_size to reflect either
the code size or the "execution time"?

Thanks for your help!
Aurélien

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