A Phase 3b, single arm, open-label, multicenter study to evaluate the safety and to demonstrate the non-inferiority of the sustained virologic response 12 weeks post dosing (SVR12) rates of 8 weeks of treatment with the glecaprevir (GLE)/pibrentasvir (PIB) combination regimen to the historical SVR12 rate of 12 weeks of treatment with the GLE/PIB in treatment-naïve adults with chronic HCV GT 1, 2, 4, 5, or 6 infection and compensated cirrhosis.