syntax_data: {"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"zmm0:"}]}
source_snippet:         zmm0: zmm_reg = ["zmm0"],
context_before:         ymm15: ymm_reg = ["ymm15"] % x86_64_only,
context_after:         zmm1: zmm_reg = ["zmm1"],