[Bug tree-optimization/52571] vectorizer changes alignment of common symbols

[rguenth at gcc dot gnu.org]

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?