syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"r13:"}]}
source_snippet:         r13: reg = ["r13", "r13w", "r13d"] % x86_64_only,
context_before:         r12: reg = ["r12", "r12w", "r12d"] % x86_64_only,
context_after:         r14: reg = ["r14", "r14w", "r14d"] % x86_64_only,