__builtin_dynamic_object_size: Recognize builtin

__builtin_dynamic_object_size: Recognize builtin

Recognize the __builtin_dynamic_object_size builtin and add paths in the
object size path to deal with it, but treat it like
__builtin_object_size for now.  Also add tests to provide the same
testing coverage for the new builtin name.

gcc/ChangeLog:

	* builtins.def (BUILT_IN_DYNAMIC_OBJECT_SIZE): New builtin.
	* tree-object-size.h: Move object size type bits enum from
	tree-object-size.c and add new value OST_DYNAMIC.
	* builtins.c (expand_builtin, fold_builtin_2): Handle it.
	(fold_builtin_object_size): Handle new builtin and adjust for
	change to compute_builtin_object_size.
	* tree-object-size.c: Include builtins.h.
	(compute_builtin_object_size): Adjust.
	(early_object_sizes_execute_one,
	dynamic_object_sizes_execute_one): New functions.
	(object_sizes_execute): Rename insert_min_max_p argument to
	early.  Handle BUILT_IN_DYNAMIC_OBJECT_SIZE and call the new
	functions.
	* doc/extend.texi (__builtin_dynamic_object_size): Document new
	builtin.

gcc/testsuite/ChangeLog:

	* g++.dg/ext/builtin-dynamic-object-size1.C: New test.
	* g++.dg/ext/builtin-dynamic-object-size2.C: Likewise.
	* gcc.dg/builtin-dynamic-alloc-size.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-1.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-10.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-11.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-12.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-13.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-14.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-15.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-16.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-17.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-18.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-19.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-2.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-3.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-4.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-5.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-6.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-7.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-8.c: Likewise.
	* gcc.dg/builtin-dynamic-object-size-9.c: Likewise.
	* gcc.dg/builtin-object-size-16.c: Adjust to allow inclusion
	from builtin-dynamic-object-size-16.c.
	* gcc.dg/builtin-object-size-17.c: Likewise.

Signed-off-by: Siddhesh Poyarekar <siddhesh@gotplt.org>