Here is an AskHistorians thread that talks more about the Chilean coup itself, and the U.S. role in said coup.
Depends on what you call "dictatorial measures", during his time as President of Chile Salvador Allende disobeyed or refused to enforce countless rulings by the Chilean Supreme Court. There is also the rumored "Plan Z", which if in enacted would have put Allende in as a dictator of Chile, but the general consensus is that such a plan never truly existed.
He nationalized the banks in Chile and also the copper industry. He instituted programs that aimed to redistribute the wealth to the poor, raising wages across the country by an average of 40% and limiting prices on goods in the country. These programs at caused a lot of short-term damage to the economy. Inflation was reaching 500% and unemployment was rampant. At first, many Chileans embraced the eventual coup, seeing it as an end to the economic problems caused by Salvador Allende's Socialist policies.