gcc/testsuite/gcc.dg/pr42662.c

   1 /* PR debug/42662 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-g -O2" } */
   4
   5 struct S { unsigned long s[17]; };
   6
   7 static inline void
   8 foo (struct S *r, struct S *a, unsigned n)
   9 {
  10   unsigned b = n / 8;
  11   r->s[0] = (b >= 1 ? : a->s[1 - b]);
  12 }
  13
  14 static inline void
  15 bar (struct S *r, struct S *a)
  16 {
  17   r->s[0] = a->s[0] << 1;
  18 }
  19
  20 static inline void
  21 baz (struct S *r, struct S *a, struct S *b)
  22 {
  23   unsigned c = 0;
  24   int i;
  25   for (i = 0; i < 3; ++i)
  26     {
  27       unsigned long d = a->s[i];
  28       long e = d + b->s[i];
  29       if (c)
  30         ++e == 0;
  31       c = e < d;
  32       r->s[i] = e;
  33     }
  34 }
  35
  36 void
  37 test (struct S *r, int s, int d)
  38 {
  39   struct S u;
  40   if (s)
  41     {
  42       bar (&u, r);
  43       foo (r, r, 3);
  44       baz (r, r, &u);
  45     }
  46   u.s[0] = d;
  47   baz (r, r, &u);
  48 }