gcc/testsuite/c-c++-common/Warray-bounds-8.c

   1 /* PR c/92326 - wrong bound in zero-length array diagnostics
   2    { dg-do compile }
   3    { dg-options "-O2 -Wall" } */
   4
   5 extern int a0[0];
   6 extern int ax[];
   7
   8 void warn_global_array (void)
   9 {
  10   a0[0] = 0;        // { dg-warning "array bounds of 'int *\\\[0]'" }
  11   ax[-1] = 0;       // { dg-warning "array bounds of 'int *\\\[]'" }
  12 }
  13
  14
  15 struct S0 { int n, a0[0]; } s0;
  16 struct Sx { int n, ax[]; } sx = { 0 };
  17
  18 void warn_member_array (void)
  19 {
  20   s0.a0[0] = 0;     // { dg-warning "array bounds of 'int *\\\[0]'" }
  21   sx.ax[0] = 0;     // { dg-warning "array bounds of 'int *\\\[]'" }
  22 }