http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60480
--- Comment #2 from ganboing at gmail dot com ---
(In reply to Andrew Pinski from comment #1)
> This is due to x86 being a small register class target.
The thing is that x86_64 has 16 GPRs, and register r12-r15 are preserved across
function ca
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ganboing at gmail dot com
gcc 4.8.2 fails to do optimization on global register variables when compiling
on x86_64 Linux.
Consider the following code
