[Bug tree-optimization/102462] vectorization breaks diagnostic for array out of bound detect.

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102462

--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
case1

struct A1
{
  char n;
  char a[1];                    // { dg-message "destination object" "note" }
};

struct A1 a1__ = { 0 };

void ga1__ (void)
{
  a1__.a[0] = 0;
  a1__.a[1] = 1;                 // { dg-warning "\\\[-Wstringop-overflow" }
  a1__.a[2] = 2;                 // { dg-warning "\\\[-Wstringop-overflow" }

  struct A1 a = { 1 };
  a.a[0] = 0;
  a.a[1] = 1;                    // { dg-warning "\\\[-Wstringop-overflow" }
  a.a[2] = 2;                    // { dg-warning "\\\[-Wstringop-overflow" }
  sink (&a);
}