gcc/testsuite/gcc.dg/vla-13.c

   1 /* Test for VLA size evaluation; see PR 35198.  */
   2 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   3 /* { dg-do run } */
   4 /* { dg-options "-std=c99" } */
   5
   6 extern void exit (int);
   7 extern void abort (void);
   8
   9 int i;
  10 void *p;
  11
  12 void
  13 f1 (void *x, int j)
  14 {
  15   p = (int (*)[++i])x;
  16   if (i != j)
  17     abort ();
  18 }
  19
  20 void
  21 f1c (void *x, int j)
  22 {
  23   p = (int (*)[++i]){x};
  24   if (i != j)
  25     abort ();
  26 }
  27
  28 void
  29 f2 (void *x, int j)
  30 {
  31   x = (void *)(int (*)[++i])p;
  32   if (i != j)
  33     abort ();
  34 }
  35
  36 void
  37 f2c (void *x, int j)
  38 {
  39   x = (void *)(int (*)[++i]){p};
  40   if (i != j)
  41     abort ();
  42 }
  43
  44 void
  45 f3 (void *x, int j)
  46 {
  47   (void)(int (*)[++i])p;
  48   if (i != j)
  49     abort ();
  50 }
  51
  52 void
  53 f3c (void *x, int j)
  54 {
  55   (void)(int (*)[++i]){p};
  56   if (i != j)
  57     abort ();
  58 }
  59
  60 void
  61 f4 (void *x, int j)
  62 {
  63   (int (*)[++i])p;
  64   (int (*)[++i])p;
  65   if (i != j)
  66     abort ();
  67 }
  68
  69 void
  70 f4c (void *x, int j)
  71 {
  72   (int (*)[++i]){p};
  73   (int (*)[++i]){p};
  74   if (i != j)
  75     abort ();
  76 }
  77
  78 void
  79 f5c (void *x, int j, int k)
  80 {
  81   (++i, f3c (x, j), (int (*)[++i]){p});
  82   if (i != k)
  83     abort ();
  84 }
  85
  86 int
  87 main (void)
  88 {
  89   f1 (p, 1);
  90   f2 (p, 2);
  91   f3 (p, 3);
  92   f4 (p, 5);
  93   f1c (p, 6);
  94   f2c (p, 7);
  95   f3c (p, 8);
  96   f4c (p, 10);
  97   f5c (p, 12, 13);
  98   exit (0);
  99 }