re PR libstdc++/53263 (priority_queue is very slow if -D_GLIBCXX_DEBUG is used)

re PR libstdc++/53263 (priority_queue is very slow if -D_GLIBCXX_DEBUG is used)

2012-05-11  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/53263
	* include/debug/safe_iterator.h (__gnu_debug::__base): Move...
	* include/debug/functions.h: ... Here. Add debug function
	overloads to perform checks on normal iterators when possible.
	* include/debug/macros.h (__glibcxx_check_heap)
	(__glibcxx_check_heap_pred): Use __gnu_debug::__base on iterator range.

From-SVN: r187414