Accessing Global variables

Accessing Global variables

[zahed khurasani]

Hi,

I know that we can access the function parameters using DECL_ARGUMENTS
and similary we can use gimple_bind_vars to access other variable
declarations attached to a bind expression. But how about Global
definitions? How can I access variables defined outside the scope of
any function.

Thanks for your help.

Zahed

Re: Accessing Global variables

[Ian Lance Taylor]

zahed khurasani <sdzahed@gmail.com> writes:

> I know that we can access the function parameters using DECL_ARGUMENTS
> and similary we can use gimple_bind_vars to access other variable
> declarations attached to a bind expression. But how about Global
> definitions? How can I access variables defined outside the scope of
> any function.

Access in what way?

GCC doesn't really have a symbol table--that is, outside of the parser,
you can't really look up global variables by name.  But you should be
able to use the cgraph to traverse all the global variables.

Ian

Re: Accessing Global variables

[zahed khurasani]

Thanks for the help Ian. By global variables access I meant to access
the VAR_DECL nodes that have global scope.

I've figured out how to do this. I am using
BLOCK_VARS(DECL_INITIAL(DECL_CONTEXT(current_function_decl)). I am
hoping this will work in all cases.

Regards,
Zahed

On Mon, Mar 26, 2012 at 4:54 PM, Ian Lance Taylor <iant@google.com> wrote:
> zahed khurasani <sdzahed@gmail.com> writes:
>
>> I know that we can access the function parameters using DECL_ARGUMENTS
>> and similary we can use gimple_bind_vars to access other variable
>> declarations attached to a bind expression. But how about Global
>> definitions? How can I access variables defined outside the scope of
>> any function.
>
> Access in what way?
>
> GCC doesn't really have a symbol table--that is, outside of the parser,
> you can't really look up global variables by name.  But you should be
> able to use the cgraph to traverse all the global variables.
>
> Ian