[Bug tree-optimization/36373] New: [4.2/4.3/4.4 Regression] Wrong code with struct return

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

extern void abort (void);
struct Foo {
    int *p;
    int *q;
};
struct Foo __attribute__((noinline))
bar(int *p)
{
  struct Foo f;
  f.p = p;
  return f;
}
void __attribute__((noinline))
foo(struct Foo f)
{
  *f.p = 0;
}
int main()
{
  int a, b;
  a = 0;
  b = 1;
  struct Foo f;
  f = bar (&b);
  f.q = &a;
  foo(f);
  if (b != 0)
    abort ();
  return 0;
}


-- 
           Summary: [4.2/4.3/4.4 Regression] Wrong code with struct return
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Keywords: wrong-code, alias
          Severity: normal
          Priority: P3
         Component: tree-optimization
        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=36373