------- Comment #3 from baldrick at free dot fr 2006-03-23 13:19 -------
I've had a look at c35507m. I think it's a front-end bug. The problem occurs
in this type support subprogram:
C35507M.CHARRP (A, F)
{
if ((system__unsigned_types__unsigned) A - 4 <= 1)
{
return (integer) ((system__unsigned_types__unsigned) A - 4);
}
else
{
if ((boolean) F)
{
__gnat_rcheck_06 ("c35507m.adb", 39);
}
else
{
}
return -1;
}
The type of A is c35507m__char, which has [TYPE_MIN, TYPE_MAX] = [4,5].
Given this, VRP correctly eliminates the range check. The code seems to
be generated by the front-end in exp_attr.adb, around line 3849.
Ciao,
Duncan.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26797
