does libgccjit support vector types?

[Michael Cree]

I am wondering if libgccjit supports vector types, i.e., can one
attach attribute __vector_size__ to the base types?  There does not
seem to be any indication of this in the manual.

I presume using gcc_jit_context_add_command_line_option() one can turn
on code generation for sse/avx/neon/altivec, etc.

And is there a way to access built-in functions such as the machine
specific simd intrinsics?

Cheers
Michael.