[Bug c++/70201] Dump C++ template instantiations

[andres.tiraboschi at tallertechnologies dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70201

--- Comment #4 from Andrés Agustín Tiraboschi <andres.tiraboschi at tallertechnologies dot com> ---
Created attachment 38139
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38139&action=edit
Patch adding new flag in order to dump information about template
instantiations.

Hi,
the attached patch adds a new compilation flag 'ftemplate-instantiations' in
order
to allow dumping debug information for template instantiations.
This flag has 2 possible values: none(by default) and hreadable, that prints
wich
templates instantiations had been made in a human readable way.
This patch was also made in order to add options easily and to interarct with
plugins.
  For example in a plugin can be defined a derived class for
template_instantiations_callbacks
implementing _function_instantiation, _class_instantiation,
_using_instantiation
and then using add_template_instantiations_callbacks in order to access
information
about wich template instantiations had been made.

This is an updated version.

Changelog
2016-03-29  Andres Tiraboschi  <andres.tiraboschi@tallertechnologies.com>

        * gcc/c-family/c.opt (ftemplate-instantiations): New flag.
        * gcc/flag-types.h (ti_dump_options): New type.
        * gcc/cp/decl2.c (cp_write_global_declarations): Added code to dump
information.
        * gcc/cp/cp-tree.h (template_instantiations_callbacks): New type.
        (call_template_instantiation_callbacks): Declare.
        (add_template_instantiations_callbacks): Likewise.
        (clean_up_callbacks): Likewise.
        * gcc/cp/pt.c (human_readable_template_instantiations): New type.
        (instantiation_callbacks): Declare.
        (call_template_instantiation_callback): New function.
        (call_template_instantiation_callbacks): Likewise.
        (add_template_instantiations_callbacks): Likewise.
        (initialize_instantiations_callbacks): Likewise.
        (clean_up_callbacks): Likewise.
        (init_template_processing): Added code to initialize
instatiation_callbacks.
        (register_specialization): Added code to dump information.
    * gcc/doc/invoke.texi (ftemplate-instantiations): Added documentation.




Thanks.