gcc/testsuite/gcc.dg/memchr-3.c

   1 /* PR middle-end/97956 - ICE due to type mismatch in pointer_plus_expr
   2    during memchr folding
   3    { dg-do compile }
   4    { dg-options "-O2 -Wall" } */
   5
   6 typedef __INT8_TYPE__  int8_t;
   7 typedef __INT32_TYPE__ int32_t;
   8
   9 extern void* memchr (const void*, int, long); /* { dg-warning "-Wbuiltin-declaration-mismatch" "" { target llp64 } } */
  10
  11 struct SX
  12 {
  13   int32_t n;
  14   int8_t a[];
  15 };
  16
  17 const struct SX sx = { 0x1221 };
  18 const char sx_rep[] = { };
  19
  20 void test_find (void)
  21 {
  22   int n = 0, nb = (const char*)&sx.a - (const char*)&sx;
  23   const char *p = (const char*)&sx, *q = sx_rep;
  24   n += p + 1 == memchr (p, q[1], nb);
  25 }