SUBO              750 src/code.c                 SUBO(INSN1(SCM_VM_PUSH_PRE_CALL, arg0), operand);
SUBO              761 src/code.c                     SUBO(INSN1(SCM_VM_PUSH_GREF, arg0), operand);
SUBO              764 src/code.c                     SUBO(INSN1(SCM_VM_LREF0_PUSH_GREF, arg0), operand);
SUBO              775 src/code.c                 SUBO(INSN1(SCM_VM_PUSH_LOCAL_ENV, arg0), SCM_FALSE);