Preface

A programmer might have come across compilers at some or the other point when programming. Simply speaking, a compiler converts a human-readable, high-level language into machine-executable code. But have you ever wondered what goes on under the hood? A compiler does lot of processing before emitting optimized machine code. Lots of complex algorithms are involved in writing a good compiler.

This book travels through all the phases of compilation: frontend processing, code optimization, code emission, and so on. And to make this journey easy, LLVM is the simplest compiler infrastructure to study. It's a modular, layered compiler infrastructure where every phase is dished out as a separate recipe. Written in object-oriented C++, LLVM gives programmers a simple interface and lots of APIs to write their own compiler.

As authors, we maintain that simple solutions frequently work better than complex solutions; throughout this book, we'll look at a variety of recipes that will help develop your skills, make you consider all the compiling options, and understand that there is more to simply compiling code than meets the eye.

We also believe that programmers who are not involved in compiler development will benefit from this book, as knowledge of compiler implementation will help them code optimally next time they write code.

We hope you will find the recipes in this book delicious, and after tasting all the recipes, you will be able to prepare your own dish of compilers. Feeling hungry? Let's jump into the recipes!