Re: GCC 4 and strict aliasing
Re: GCC 4 and strict aliasing
- Subject: Re: GCC 4 and strict aliasing
- From: Eric Christopher <email@hidden>
- Date: Mon, 20 Mar 2006 11:43:12 -0800
On Mar 20, 2006, at 11:36 AM, Sean McBride wrote:
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.
I wouldn't object to that bug report being filed. :)
-eric
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