syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // advantage of an LLVM ABI extension that allows using 3
context_before:                 // case the x86_64 backend would pass it in registers by taking
context_after:                 // registers for the x86_64 sysv call conv rather than the