syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"xmm12:"}]}
source_snippet:         xmm12: xmm_reg = ["xmm12"] % x86_64_only,
context_before:         xmm11: xmm_reg = ["xmm11"] % x86_64_only,
context_after:         xmm13: xmm_reg = ["xmm13"] % x86_64_only,