[Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2

[cbaylis at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012

cbaylis at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
                 CC|                            |cbaylis at gcc dot gnu.org
         Resolution|---                         |INVALID

--- Comment #7 from cbaylis at gcc dot gnu.org ---

This is caused by an invalid implementation of memset in (old versions of) the
Linux kernel.

I investigated this, a longer description is on the Linaro bugzilla at
https://bugs.linaro.org/show_bug.cgi?id=928#c7