{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"\"read.ptx.sreg.envreg1\""}]}
                    "read.ptx.sreg.envreg1" => "__nvvm_read_ptx_sreg_envreg1",
                    "read.ptx.sreg.envreg0" => "__nvvm_read_ptx_sreg_envreg0",
                    "read.ptx.sreg.envreg10" => "__nvvm_read_ptx_sreg_envreg10",