gcc/testsuite/gcc.dg/pr33667.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 typedef unsigned int size_t;
   5 typedef unsigned char uint8_t;
   6 typedef unsigned short int uint16_t;
   7 typedef unsigned long long int uint64_t;
   8 struct magic {
   9   uint8_t mask_op;
  10   union {
  11    uint64_t _mask;
  12   } _u;
  13   union VALUETYPE {
  14    uint16_t h;
  15   } value;
  16 };
  17 void cvt_16(union VALUETYPE *p, const struct magic *m)
  18 {
  19   if (m->_u._mask)
  20     p->h %= (uint16_t) m->_u._mask;
  21 }