LDE225 is a new medicine that blocks the Hedgehog (Hh) pathway. The Hh pathway is a cascade of molecular events that control cell growth and have been linked with the development of many human cancers, including pancreatic cancer. Information from research studies suggests that LDE225 in combination with FOLFIRINOX may help to stop the growth of cancer cells. In this research study, the investigators are looking to determine the maximum dose of LDE225 in combination that can be given safely to patients with locally advanced or metastatic pancreatic cancer.