--- Comment #5 from pinskia at gcc dot gnu dot org 2006-01-13 03:34 ---
You are violating C++ aliasing rules, you have:
int new_ybar_inline
p = reinterpret_cast( free_list );
free_list = free_list->next;
..
return p;
*newchild = new_ybar_inline();
(*newchild)
--- Comment #4 from sschunck at pdf dot de 2006-01-12 19:55 ---
additional info:
if instruction
movl$1, (%edx)
would be located two lines later the generated code would be correct (AFAIK)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25768
--- Comment #3 from sschunck at pdf dot de 2006-01-12 17:04 ---
The miscompiled line is
(*newchild)->kind = interior; ( interior = 1 )
but when
movl$1, (%edx)
is done
edx points to
free_list;
from function MemPool::new_element()
instead of newchild
--
http://gcc.g
--- Comment #2 from pinskia at gcc dot gnu dot org 2006-01-12 16:49 ---
>From looking at the source, it looks like you are violating aliasing rules but
I cannot pinpoint where you are violating them.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25768
--- Comment #1 from sschunck at pdf dot de 2006-01-12 16:45 ---
Created an attachment (id=10630)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10630&action=view)
c++ code
the following assembler snipplet shows that the
movl$1, (%edx)
is scheduled too early
.globl _ZN1A3foo
