[Bug middle-end/38212] New: restrict implementation causes wrong-code

[rguenth at gcc dot gnu dot org]

The following is miscompiled by RTL cse at -O2 

int __attribute__((noinline))
foo (int *__restrict p, int i)
{
  int *__restrict q;
  int *__restrict r;
  int v, w;
  q = p + 1;
  r = q - i;
  v = *r;
  *p = 1;
  w = *r;
  return v + w;
}
extern void abort (void);
int main()
{
  int i = 0;
  if (foo (&i, 1) != 1)
    abort ();
  return 0;
}


-- 
           Summary: restrict implementation causes wrong-code
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: wrong-code, alias
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38212