IMCC could analyze a module, decide if the optimization makes sense, and place commonly used values (constants or variables) in a pre-packaged register frame. (or more than 1) This is done at compile / load time of course. If it were all constants, compile time works, but for PMCs and Strings it would have to be built at loadtime.
Upon invoking a busy routine, it _might_ be more efficient (since we already save register frames anyway) to initialize the upper frame (top 16 registers) with a pre-built register set.
It might also be more useful to have it more granular than 16, maybe in 4s or 8s. By doing life analysis and some weighting, IMCC might be able to turn multiple symbol lookups into 1.
Comments & questions welcome.
Why am I thinking of the "register" keyword in C?
Liz
