Take the following code:
int f(int);
int g(void)
{
int i;
int *iptr = &i;
int **ipp = &iptr;
**ipp = 1;
f(i);
return **ipp;
}
----------
Here we consider i being call clobber because we lose the fact that iptr is
addressable but we don't look to see if its address escapes at all (which in
this case it does not).
--
Summary: Address taken and addressable variables and call clobber
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24694
