There were terrestrial predatory crocodiles, but they weren’t anywhere near the size of large predatory dinosaurs (nor even present day saltwater crocodiles, let alone the even larger aquatic crocodiles that existed in the Mesozoic).

Last I’d heard, most marine reptiles from the Mesozoic were not assumed to be warm-blooded because non-archosaur diapsids like that simply weren’t assumed to have evolved endothermy, but I haven’t really kept up on speculation about that, so it’s possible the consensus has shifted with at least some of them (as obviously dinosaurs themselves have only been widely-assumed to be endothermic relatively recently).