How to create a C compiler for custom CPU?

Question

What would be the easiest way to create a C compiler for a custom CPU, assuming of course I already have an assembler for it?

Since a C compiler generates assembly, is t

Answer 1

Quick overview/tutorial on writing a LLVM backend.

This document describes techniques for writing backends for LLVM which convert the LLVM representation to machine assembly code or other languages.

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To create a static compiler (one that emits text assembly), you need to implement the following:

• Describe the register set.
• Describe the instruction set.
• Describe the target machine.
• Implement the assembly printer for the architecture.
• Implement an instruction selector for the architecture.