gcc/testsuite/gcc.dg/pr51990-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-require-effective-target alloca } */
   4
   5 int y;
   6 extern int foo (int, ...) __attribute__((pure));
   7
   8 int
   9 zzz (char *s1, char *s2, int len, int *q, int c)
  10 {
  11   int z = 5;
  12   unsigned int i, b;
  13   struct s { char a[z]; };
  14   struct s x;
  15   int y_tmp = 5;
  16
  17   for (i = 0; i < len; i++)
  18     s1[i] = s2[i];
  19
  20   b = z & 0x3;
  21
  22   len += (b == 0 ? 0 : 1) + z;
  23
  24   *q = len;
  25
  26  if (c)
  27    y_tmp = foo (z, x, x) + 4;
  28
  29  z = foo (z, x, x) + 4;
  30  y = y_tmp;
  31
  32  return  z;
  33 }