syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // x13 and x14 cannot be used in Arm64EC.
context_before:                 AArch64 AArch64InlineAsmReg {
context_after:                     x0, x1, x2, x3, x4, x5, x6, x7,