jit: add gcc_jit_type_get_vector

jit: add gcc_jit_type_get_vector

gcc/jit/ChangeLog:
	* docs/cp/topics/types.rst (Vector types): New section.
	* docs/topics/compatibility.rst (LIBGCCJIT_ABI_8): New tag.
	* docs/topics/types.rst (gcc_jit_context_get_type): Fix typo in
	example.
	(Vector types): New section.
	* docs/_build/texinfo/libgccjit.texi: Regenerate.
	* jit-playback.c (gcc::jit::playback::type::get_vector): New
	method.
	* jit-playback.h (gcc::jit::playback::type::get_vector): New
	method.
	* jit-recording.c: In namespace gcc::jit::recording::
	(type::get_vector): New method.
	(memento_of_get_aligned::write_reproducer): Fix typo
	in leading comment.
	(memento_of_get_vector::replay_into): New method.
	(memento_of_get_vector::make_debug_string): New method.
	(memento_of_get_vector::write_reproducer): New method.
	* jit-recording.h: In namespace gcc::jit::recording::
	(type::get_vector): New
	 method.
	(class memento_of_get_vector): New class.
	* libgccjit++.h (gccjit::type::get_vector): New method.
	* libgccjit.c (gcc_jit_type_get_vector): New public entrypoint.
	* libgccjit.h (LIBGCCJIT_HAVE_gcc_jit_type_get_vector): New
	define.
	(gcc_jit_type_get_vector): New decl.
	* libgccjit.map (LIBGCCJIT_ABI_8): New ABI tag.

gcc/testsuite/ChangeLog:
	* jit.dg/all-non-failing-tests.h: Add note about
	test-vector-types.cc.
	* jit.dg/test-error-gcc_jit_type_get_vector-bad-type.c: New test
	case.
	* jit.dg/test-error-gcc_jit_type_get_vector-non-power-of-two.c:
	New test case.
	* jit.dg/test-vector-types.cc: New test case.

From-SVN: r251018