gcc/testsuite/gcc.dg/pr40946.c

   1 /* PR middle-end/40946 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -Wall" } */
   4
   5 struct A
   6 {
   7   unsigned char a1[8];
   8   unsigned short a2, a3, a4, a5, a6, a7;
   9 };
  10
  11 int bar (void *, const char *, int);
  12 char *foo (void *, int);
  13
  14 char *
  15 baz (const char *x, const char *y)
  16 {
  17   int a = sizeof (struct A) + 2 * (__builtin_strlen (y)
  18                                    + __builtin_strlen (x) + 24) + 16;
  19   struct A *b = __builtin_malloc (a);
  20   char *c;
  21   int d;
  22
  23   b->a4 = sizeof (struct A);
  24   c = ((char *) b) + b->a4;
  25   d = ((char *) b) + a - c;
  26   b->a2 = b->a3 = (unsigned short) bar (c, y, d); /* { dg-bogus "array subscript is above array bounds" } */
  27   c += b->a2;
  28   d = ((char *) b) + a - c;
  29   b->a7 = b->a4 + b->a2;
  30   b->a5 = b->a6 = (unsigned short) bar (c, x, d);
  31   c = foo (b, a);
  32   return c;
  33 }