Their web site is very sparse on what programming models the tool supports. Traditionally, the things you can easily accelerate automatically are algorithms you can write naturally in Fortran 77 (lots of arrays, no pointers), and that's one limit on the applicability of these automatic tools. (Other limits that other posters have pointed out are compilation+place+route runtime, and reconfiguration time.)
They are claiming you can use malloc and make "extensive" use of pointers in C programs and still have them automatically compiled for the FPGA. That's where details are needed and they are mostly missing.
I watched their 30 minute demo film. The speedups are impressive, and on the small example it's impressive that it does the partitioning automatically. However, the program contains only a single call to malloc, and all pointers are derived from that address, so it doesn't do much to convince us that it the memory model and alias analysis give you more flexibility than the F77 model.
They are claiming you can use malloc and make "extensive" use of pointers in C programs and still have them automatically compiled for the FPGA. That's where details are needed and they are mostly missing.
I watched their 30 minute demo film. The speedups are impressive, and on the small example it's impressive that it does the partitioning automatically. However, the program contains only a single call to malloc, and all pointers are derived from that address, so it doesn't do much to convince us that it the memory model and alias analysis give you more flexibility than the F77 model.