Register Allocation and Data Conversion In Machine Independent Code
Marshall Kirk McKusick · 1984
This dissertation investigates the problems of register allocation and intermediate language design in retargetable code generators. The goal is to develop tools that allow high quality code generators to be constructed rapidly. Formal methods are used to attack the problem of register allocation in a Graham-Glanville table driven code generator. Previous work in register allocation has used a single register allocator following the code generator of the compiler. In this research, the register allocator is split into two phases, a global register allocator is included in an optimizer that runs before code generation. The local register allocator is part of the code generator. Data flow information computed by the optimizer is passed to the local register allocators are table driven so that they can be easily specified and changed.