gcc/testsuite/gcc.dg/Warray-bounds-55.c

   1 /* PR middle-end/92373 - ICE in -Warray-bounds on access to member array
   2    in an initialized char buffer
   3    { dg-do compile }
   4    { dg-options "-O2 -Wall" } */
   5
   6 void sink (void*);
   7
   8 struct S
   9 {
  10   char data[1];
  11 };
  12
  13 char a[6] = { };
  14
  15 int f (void)
  16 {
  17   struct S *p = (struct S*)a;
  18   return p->data[4];
  19
  20 }
  21
  22 void g (void)
  23 {
  24   char b[6] = { };
  25   struct S *p = (struct S*)b;
  26   p->data[4] = 0;
  27   sink (p);
  28 }