Hi, I'm planning to change TYPE_ARG_TYPES to use TREE_VEC instead of TREE_LIST for compact representation.
I just noticed that the Java frontend has ARG_FINAL_P, which uses a bit in the TREE_LIST node that is pointed to from TYPE_ARG_TYPES. I am wondering if there is any way we could move this bit elsewhere. The TREE_VEC node doesn't really have space for per-parameter data other than the vector proper. I could use TREE_TYPE of TREE_VEC to keep an array of boolean values to represent ARG_FINAL_P for each parameter, but I am not sure if that is a clean solution. Thoughts? Kazu Hirata
