------- Comment #8 from hubicka at gcc dot gnu dot org 2009-11-12 13:23 -------
There are some bugs on LTO and unused vars elimination, but in this testcase we
end up with:
main:
.LFB2:
subq $8, %rsp
.LCFI0:
movl y(%rip), %esi
movl $.LC0, %edi
xorl %eax, %eax
addl $5, %esi
movl %esi, y(%rip)
call printf
xorl %eax, %eax
addq $8, %rsp
.LCFI1:
ret
.LFE2:
While GCC might be able to recognize that main is not reentrant and thus
computing the static variable is useless, this is bit tricky to do.
Honza
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41589
