The above is a graphical representation of a program in LLVM IR. It places each basic block on a node of a graph, and uses directed edges to indicate flow control. These blocks will be serialized when written to a text or bitcode file, but it is often useful conceptually to think of them as a graph. Again, if you are unsure about the code in the diagram, you should skim through the LLVM Language Reference Manual and convince yourself that it is, in fact, the GCD algorithm.
-The first part of our code is practically the same as from the first tutorial. The same basic setup is required: creating a module, verifying it, and running the PrintModulePass on it. Even the first segment of makeLLVMModule() looks essentially the same, except that gcd takes one more parameter than mul_add.
The first part of our code is practically the same as from the first tutorial. The same basic setup is required: creating a module, verifying it, and running the PrintModulePass on it. Even the first segment of makeLLVMModule() looks essentially the same, except that gcd takes one fewer parameter than mul_add.