[Bug tree-optimization/47575] store-motion removes global stores from endless loops

[rakdver at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47575

--- Comment #2 from Zdenek Dvorak <rakdver at gcc dot gnu.org> 2011-02-01 16:56:57 UTC ---
There is nothing in C standard requiring us to preserve global stores that are
unused, unless they are volatile.  Store motion is by far not the only
optimization in gcc that affects global stores.  That this happens in an
endless loop is not important.