gistfile1.txt

/* for GCC 3.4.x */
#define TC_DISPATCH(insn) \
    if (UNLIKELY(th->event_flags) && RUBY_VM_NORMAL_ISEQ_P(REG_CFP->iseq) && UNLIKELY(REG_CFP->iseq->iseq_flag != NULL)) \
    { \
        unsigned long pos = REG_CFP->pc - REG_CFP->iseq->iseq_encoded; \
        if (REG_CFP->iseq->iseq_flag[pos] & RUBY_EVENT_CALL) \
          EXEC_EVENT_HOOK(th, RUBY_EVENT_CALL, GET_SELF(), 0, 0); \
        if (REG_CFP->iseq->iseq_flag[pos] & RUBY_EVENT_LINE) \
          EXEC_EVENT_HOOK(th, RUBY_EVENT_LINE, GET_SELF(), 0, 0); \
        if (REG_CFP->iseq->iseq_flag[pos] & RUBY_EVENT_RETURN) \
          EXEC_EVENT_HOOK(th, RUBY_EVENT_RETURN, GET_SELF(), 0, 0); \
    } \
  INSN_DISPATCH_SIG(insn); \
  goto *GET_CURRENT_INSN(); \
  ;