------- Additional Comments From pinskia at gcc dot gnu dot org 2005-08-11
19:43 -------
Here is an example which shows that IV-OPTs is not the cause and that we have
the same issue and
shows what is going wrong clearer:
int k(int);
int h(void);
long h1(void);
int f(int i)
{
int oldii;
int ii;
ii = h1();
do
{
oldii = ii;
k(ii);
ii = oldii + h();
} while (i<ii);
return oldii;
}
We remove the use of oldii and use ii_n instead, I think we are coalescing the
wrong two ii_n and not
the two inside the loop but the one that was called oldii with the one before
the loop.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21488
