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[Bug middle-end/27770] [4.2 Regression] wrong code in spec tests for -ftree-vectorize -maltivec
- From: "dorit at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 23 Jul 2006 19:04:00 -0000
- Subject: [Bug middle-end/27770] [4.2 Regression] wrong code in spec tests for -ftree-vectorize -maltivec
- References: <bug-27770-4503@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #19 from dorit at il dot ibm dot com 2006-07-23 19:03 -------
> The fix we've agreed is best in principle is to speculatively increase
> the DECL_ALIGN of vectorisable variables before compiling functions.
> Dorit says that there is a patch related to this on the autovect branch,
> which I'll look at when I get back from Ottawa.
> Richard
Turns out the patch I was thinking about is only for the rs6000 port:
http://gcc.gnu.org/ml/gcc-patches/2006-05/msg00266.html
so that's not much help.
Do we want to implement this as a separate pass? at which point of the
compilation? (doing it during ipa might be a problem if ipa is not enabled?)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27770