 4. Kaleidoscope: Adding JIT and Optimizer Support

Part of the Implementing a language with LLVM tutorial in LLVM 20.1.0 documentation.

Online text: releases.llvm.org/20.1.0/docs/tutorial/MyFirstLanguageFrontend/LangImpl04.html

Cited passages: LLVM 20.1.0 documentation, Implementing a language with LLVM, §4.1: optimizer and just-in-time compilation additions; §4.4: HandleTopLevelExpression, addModule, lookup and a native function call; §4.5: full code listing and ExprSymbol.toPtr.