[PATCH] Make debug_tree() print the length of a TREE_VEC

[Jeff Law]

On 06/25/2015 10:22 AM, Patrick Palka wrote:
> When printing a TREE_VEC, this patch makes its length get printed
> alongside its prefix, e.g.
>
>      <tree_vec 0x7ffff6a4d0a0 length 2
>          elt 0 ....>
>
> Without a reference to its length, an all-NULL TREE_VEC otherwise looks like
> an empty TREE_VEC, since NULL elts don't get printed.  This makes
> debugging such TREE_VECs pretty confusing.
>
> Is this OK to commit?
>
> gcc/ChangeLog:
>
> 	* print-tree.c (print_node) [TREE_VEC]: Print its length.
OK after the usual bootstrap & regression test.

jeff