Re: GCC 4 and strict aliasing
Re: GCC 4 and strict aliasing
- Subject: Re: GCC 4 and strict aliasing
- From: "Sean McBride" <email@hidden>
- Date: Mon, 20 Mar 2006 14:36:56 -0500
- Organization: Rogue Research
On 2006-03-18 02:40, Eric Christopher said:
>>> 2) Apple's GCC should not turn on -fstrict-aliasing when -ftree-
>>> vectorize -fno-strict-aliasing is passed.
>
>Don't file this one - the vectorizer needs the information to
>vectorize properly (a good reason to make your code aliasing safe :)
Well, if -fno-strict-aliasing is explicitly passed, its pretty evil to
turn it on, even if another flag needs it. Wouldn't it be better that
give a message saying that -ftree-vectorize and -fno-strict-aliasing
can't be used together? Otherwise people will have the same problem as
the OP in the future. If I was the OP, I'd file this bug.
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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