{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
            let imm32 = crate::constant::mir_operand_get_const_val(fx, imm32)
            let a = codegen_operand(fx, a);
                .expect("llvm.aarch64.neon.sqshrn.v* imm32 not const");