+General issues:
+===============
+
+We are designing a JIT compiler, so we have to consider two things:
+
+- the quality of the generated code
+- the time needed to generate that code
+
+The current approach is to keep the JITer as simple as possible, and thus as
+fast as possible. The generated code quality will suffer from that.
+
+Register Allocation:
+====================
+
+With lcc you can assign a fixed register to a tree before register
+allocation. For example this is needed by call, which return the value always
+in EAX on x86. The current implementation works without such system, due to
+special forest generation.
+
+Different Register Sets: