My French is rusty so I'll answer in English.
Under the shah, there was the Iranian army. There were those who were under his.... The army continued on after the 1979 revolution. Many were executed at that point, but some were.... I would say that the function of the army is to protect the sovereignty and territory and, to a certain extent, to protect the lives of those inside Iran from, let's just say, war from outside.
Those who are in positions of power generally have some adherence to the supreme leader and to the tenets of the Islamic republic. I wouldn't say that everybody in the Iranian army is safe or trustworthy, but definitely, at the core of the IRGC, their main role—their only role—is to protect the Islamic regime establishment.
That's why you'll note that the name “Islamic Revolutionary Guard Corps” doesn't have the word “Iranian” in it. They're not there to protect the Iranian people; they're there only to protect their regime and the expansion of this Islamist ideology.