Re: GCC 4 and strict aliasing
Re: GCC 4 and strict aliasing
- Subject: Re: GCC 4 and strict aliasing
- From: "Frederik Slijkerman (FabFilter)" <email@hidden>
- Date: Tue, 21 Mar 2006 09:10:00 +0100
Hi Eric,
I've reported the strict aliasing issue in the CoreAudio SDK as #4485220.
Awesome, thanks! I will file the bug reports as you suggested. I've also
noticed that Xcode 2.2 / GCC 4 generates rather sub-optimal code for
Intel, with a lot of unnecessary extra register movements. Is this a
known problem?
Some of them are. If you like, go ahead and try to reduce a testcase to
show anything particularly bad.
I'll keep an eye open!
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 :)
I've filed a feature request to generate a warning in this case, as
suggested by Sean: #4485223.
Cheers,
Frederik Slijkerman
FabFilter Software Instruments
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