Re: unify line number handling patch 1

[Gabriel Dos Reis <gdr at integrable-solutions dot net>]

I wanted to do this kind of lifting some time ago.  Thanks for
tackling it.

Nathan Sidwell <nathan@codesourcery.com> writes:

[...]

| I couldn't simply #define lineno, as that is used in places as fieldname.
| Something had to change and I felt input_line matched the name input_filename.

I think we should just get rid of lineno and input_filename, and use a
single object.  Save/Restore of "lineno, input_filename" is combersome. 

[...]

| --- c-common.c	30 Apr 2003 16:21:26 -0000
| *************** c_expand_start_cond (cond, compstmt_coun
| *** 920,926 ****
|     /* Record this if statement.  */
|     if_stack[if_stack_pointer].compstmt_count = compstmt_count;
|     if_stack[if_stack_pointer].file = input_filename;
| !   if_stack[if_stack_pointer].line = lineno;
|     if_stack[if_stack_pointer].needs_warning = 0;


We should just be saying 

   if_stack[if_stack_pointer].locus = input_locus

instead of manual componments settings.

[...]

| !   DECL_SOURCE_LINE (decl) = lineno;
|     DECL_SOURCE_FILE (decl) = input_filename;

Same here

    DECL_SOURCE_LOCATION (decl) = input_locus;

and so on...

-- Gaby