This patch is part of a consolodation of the hash_table patches to
the cxx-conversion branch for files not under gcc/config.

Update various hash tables from htab_t to hash_table.
Modify types and calls to match.

* var-tracking.c'emit_note_data_def.vars
* var-tracking.c'shared_hash_def.htab
* var-tracking.c'changed_variables

Fold variable_htab_hash, variable_htab_eq, variable_htab_free
  into new struct variable_hasher.
Add typedef variable_table_type.
Add typedef variable_iterator_type.

Tested on x86_64.


Index: gcc/ChangeLog

	* var-tracking.c (shared_hash_def::htab):
	Change type to hash_table.  Update dependent calls and types.

2013-04-25  Lawrence Crowl  <crowl@google.com>

From-SVN: r198330