syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // information about which target feature is ABI-required for which vector size; this is used to
context_before: // registers. Those are permitted to be listed here. The `*_FOR_CORRECT_VECTOR_ABI` arrays store
context_after: // ensure that vectors can only be passed via `extern "C"` when the right feature is enabled. (For