gcc/testsuite/gcc.dg/vla-stexp-8.c

   1 /* PR29970, PR91038 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -Wunused-variable" } */
   4
   5
   6 int foo0(void)
   7 {
   8         int c = *(*(*({ int n = 10; int (*x)[n][n] = __builtin_malloc(sizeof *x); x; }) + 5) + 5);
   9         return c;
  10 }
  11
  12 int foo1(void)
  13 {
  14         int c = *(5 + *(5 + *({ int n = 10; int (*x)[n][n] = __builtin_malloc(sizeof *x); x; })));
  15         return c;
  16 }
  17
  18 int bar2(void)
  19 {
  20         int c = (*({ int n = 10; struct { int y[n]; int z; }* x = __builtin_malloc(sizeof *x); x; })).z;
  21         return c;
  22 }
  23
  24 int bar3(void)
  25 {
  26         int n = 2;      /* { dg-warning "unused variable" } */
  27         int c = (*({ int n = 3;         /* { dg-warning "unused variable" } */
  28                 ({ int n = 10; int (*x)[n][n] = __builtin_malloc(sizeof *x); x; }); }))[5][5];
  29         return c;
  30 }
  31
  32 int bar3b(void)
  33 {
  34         int n = 2;      /* { dg-warning "unused variable" } */
  35         int c = (*({ int n = 3;         /* { dg-warning "unused variable" } */
  36                 ({ int n = 10; int (*x)[n][n] = __builtin_malloc(sizeof *x); x; }); }))[0][0];
  37         return c;
  38 }
  39
  40 int bar4(void)
  41 {
  42         int n = 2;      /* { dg-warning "unused variable" } */
  43         int c = *(5 + *( 5 + *({ int n = 3;     /* { dg-warning "unused variable" } */
  44                 ({ int n = 10; int (*x)[n][n] = __builtin_malloc(sizeof *x); x; }); })));
  45         return c;
  46 }
  47