Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In computing, compiler correctness is the branch of software engineering that deals with trying to show that a compiler behaves according to its language specification. Techniques include developing the compiler using formal methods and using rigorous testing (often called compiler validation) on an existing compiler.Compiler validation with formal methods involves a long chain of formal, deductive logic. However, since the tool to find the proof (theorem prover) is implemented in software and is complex, there is a high probability it will contain bugs. One approach has been to use a tool that verifies the proof (a proof checker) which because it is much simpler than a proof-finder is less likely to contain bugs.

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