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[Bug tree-optimization/52571] vectorizer changes alignment of common symbols
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 13 Mar 2012 08:34:51 +0000
- Subject: [Bug tree-optimization/52571] vectorizer changes alignment of common symbols
- Auto-submitted: auto-generated
- References: <bug-52571-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52571
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2012-03-13
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-13 08:34:51 UTC ---
Hmm, if that is actually the bug I wonder if we should recommend -fno-common
for performance reason :(
Why is the link editor not required to use the biggest alignment? Or,
why should the alignment of a common symbol not change based on compiler
optimization level? What's so special about commons here? Thus, why
is this not a linker bug?