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[Bug c/49379] warning from Mac OS X linker alignment lost for -ftree-vectorize optimization
- From: "gary at intrepid dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 12 Jun 2011 13:07:13 +0000
- Subject: [Bug c/49379] warning from Mac OS X linker alignment lost for -ftree-vectorize optimization
- Auto-submitted: auto-generated
- References: <bug-49379-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49379
--- Comment #4 from Gary Funck <gary at intrepid dot com> 2011-06-12 13:04:59 UTC ---
We think that this issue is related to an optimization that increases the
alignment of common symbols that have the potential to improve vectorization.
We didn't run a reghunt, but it looks like this may have been the update that
initially implemented the alignment change.
r120576 | hubicka | 2007-01-08 03:13:14 -0800 (Mon, 08 Jan 2007) | 23 lines
[...]
* tree-vectorizer.c (increase_alignment): Move here from cgraphunit.c
(gate_increase_alignment): New function.
(pass_ipa_increase_alignment): New pass.
We've determined: (1) the vanilla GNU/Linux linker doesn't complain, (2) the
installed (Apple) GCC compiler likely pre-dates the change above.