gcc/testsuite/gcc.dg/ipa/ipa-pta-14.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fipa-pta -fno-tree-fre -fno-tree-sra -fdump-ipa-pta2-details -fdelete-null-pointer-checks" } */
   3
   4 struct X {
   5     int i;
   6     void *p;
   7 };
   8
   9 static void * __attribute__((noinline,noclone))
  10 foo(struct X *q, void *p)
  11 {
  12   struct X b;
  13   b.p = p;
  14   *q = b;
  15   return q->p;
  16 }
  17 extern void abort (void);
  18 int main()
  19 {
  20   struct X a, c;
  21   void *p;
  22   a.p = (void *)&c;
  23   p = foo(&a, &a);
  24   /* { dg-final { scan-ipa-dump "foo.result = { NULL a\[^ \]* c\[^ \]* }" "pta2" { target { ! keeps_null_pointer_checks } } } } */
  25   /* { dg-final { scan-ipa-dump "foo.result = { NONLOCAL a\[^ \]* c\[^ \]* }" "pta2" { target { keeps_null_pointer_checks } } } } */
  26   ((struct X *)p)->p = (void *)0;
  27   if (a.p != (void *)0)
  28     abort ();
  29   return 0;
  30 }
  31