LLVM API Reference

Comprehensive documentation for LLVM libraries, tools, and programmatic interfaces

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Key API Components

Core LLVM APIs

Fundamental libraries like IR, Pass, Support, and TransformUtils for compiler development.

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Clang APIs

APIs for parsing, analyzing, and transforming C/C++/Objective-C code with AST operations.

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Tooling APIs

Libraries for creating compilers, static analyzers, and refactoring tools with clangd integration.

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Function Pass Example

#include "llvm/Passes/Pass.h"
#include "llvm/IR/Function.h"

using namespace llvm;

namespace {
  struct MyPass : public FunctionPass {
    static char ID;
    MyPass() : FunctionPass(ID) {}

    bool runOnFunction(Function &F) override {
      // Simple optimization logic
      for (auto &BB : F) {
        for (auto &I : BB) {
          // Process instructions here
        }
      }
      return true;
    }
  };
}

char MyPass::ID = 0;
static RegisterPass<MyPass> X("my-pass", "Simple Function Pass");

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