GENERIC global variable context

Philip Herron redbrain@gcc.gnu.org
Wed Aug 21 11:50:00 GMT 2013


I think more correctly i am looking to define a VAR_DECL at file scope
and not sure how.

--Phil

On 20 August 2013 16:04, Philip Herron <redbrain@gcc.gnu.org> wrote:
> Hey
>
> I am wondering how do i have a global variable in GENERIC currently i am doing:
>
> tree stack_offset = build_decl (BUILTINS_LOCATION, VAR_DECL,
>  create_tmp_var_name ("__MODULE_STK_OFFS"),
>  sizetype);
>
>   TREE_STATIC (stack_offset) = 1;
>   TREE_PUBLIC (stack_offset) = 1;
>   TREE_USED (stack_offset) = 1;
>   DECL_INITIAL (stack_offset) = build_int_cst (integer_type_node, 0);
>   rest_of_decl_compilation (stack_offset, 1, 0);
>
> Then i add this to the array of stuff you pass to the middle-end but i
> am getting:
>
> <built-in>: In function ‘t.__main_start__’:
> <built-in>:0:0: internal compiler error: in expand_expr_real_1, at expr.c:9326
>
> Its this assert:
>
> /* Variables inherited from containing functions should have
> been lowered by this point.  */
>       context = decl_function_context (exp);
>       gcc_assert (!context
>  || context == current_function_decl
>  || TREE_STATIC (exp)
>  || DECL_EXTERNAL (exp)
>  /* ??? C++ creates functions that are not TREE_STATIC.  */
>  || TREE_CODE (exp) == FUNCTION_DECL);
>
> So it must be because that has no context set but i the idea is that i
> want in generic to be able to use this global variable:
>
> sizetype myglobal
>
> void myfunction () {
> ...
> sizetype x = myglobal + ...
> }
>
> I hope this makes sense just not sure what the context needs to be set
> to i think.
>
> --Phil



More information about the Gcc-help mailing list