Is there something special to do in order to turn on the use of tablegen patterns for fast-isel. I know that we are generating the fast-isel files for mips. For example: it gets a : FastISel miss: %add = add nsw i32 %1, %0 But we have the underlying structure for this. I.e. i can assign literals to int globals and such. And we have the pattern for matching "add". Is there an easy way to trace this? TIA. Reed