gcc/testsuite/gcc.dg/pr51990.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-require-effective-target alloca } */
   4
   5 int
   6 zzz (char *s1, char *s2, int len, int *q)
   7 {
   8   int z = 5;
   9   unsigned int i, b;
  10   struct s { char a[z]; };
  11   struct s x;
  12
  13   extern int foo (int, ...) __attribute__((pure));
  14
  15   for (i = 0; i < len; i++)
  16     s1[i] = s2[i];
  17
  18   b = z & 0x3;
  19
  20   len += (b == 0 ? 0 : 1) + z;
  21
  22   *q = len;
  23   return foo (z, x, x);
  24 }