KeithTsui

The LLVM backend transformation steps from IR Lowering to Asm output and their related code.

This aritcle is to show how a simple LLVM IR example is transformed into RISCV Assembly. Part One.

There are eight big steps for adding a new llvm backend.

Specify the needed steps for adding a new instruction to existing llvm backend.

This aritcle is to show the steps for creating an LLVM Backend.

OOP is Object-Oriented Programming; PP is Procedure Programming; and FP is Functional Programming.

Table of Contents 1. Prepare LLVM project. 2. Make your pass 3. Compile your pass 4. Test it with op

Some notes about tablegen and its data structures with some explaination.

The LLVM Tablegen target description for RISCV ADD instruction and its variants.