llvm-tutorial/source/Main.cpp

// Standard includes
#include <cstdio>

//LLVM includes
#include "llvm/Support/TargetSelect.h"
#include "KaleidoscopeJIT.h"
#include "llvm/IR/DIBuilder.h"

// Local includes
#include "JIT.h"
#include "Ast.h"
#include "Lexer.h"
#include "Parser.h"
#include "Debug.h"

namespace helper {
// Cloning make_unique here until it's standard in C++14.
// Using a namespace to avoid conflicting with MSVC's std::make_unique (which
// ADL can sometimes find in unqualified calls).
template <class T, class... Args>
static
    typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
    make_unique(Args &&... args) {
  return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
}
}

//===----------------------------------------------------------------------===//
// "Library" functions that can be "extern'd" from user code.
//===----------------------------------------------------------------------===//



//===----------------------------------------------------------------------===//
// Main driver code.
//===----------------------------------------------------------------------===//

int main() {
  InitializeNativeTarget();
  InitializeNativeTargetAsmPrinter();
  InitializeNativeTargetAsmParser();

  jit::JITObjects::TheJIT = llvm::make_unique<llvm::orc::KaleidoscopeJIT>();
  jit::InitializeModule();

  // Prime the first token.
  parser::getNextToken();

  // Add the current debug info version into the module.
  AstObjects::TheModule->addModuleFlag(Module::Warning, "Debug Info Version",
                           DEBUG_METADATA_VERSION);

  // Darwin only supports dwarf2.
  if (Triple(sys::getProcessTriple()).isOSDarwin()) {
    AstObjects::TheModule->addModuleFlag(llvm::Module::Warning, "Dwarf Version",
      2);
  }

  // Construct the DIBuilder, we do this here because we need the module.
  debugger::DebugObjects::DBuilder =
      llvm::make_unique<DIBuilder>(*AstObjects::TheModule);

  // Create the compile unit for the module.
  // Currently down as "fib.ks" as a filename since we're redirecting stdin
  // but we'd like actual source locations.
  debugger::KSDbgInfo.TheCU = debugger::DebugObjects::DBuilder->createCompileUnit(
      dwarf::DW_LANG_C, "fib.ks", ".", "Kaleidoscope Compiler", 0, "", 0);

  // Run the main "interpreter loop" now.
  parser::MainLoop();

  // Finalize the debug info.
  debugger::DebugObjects::DBuilder->finalize();

  AstObjects::TheModule->dump();

  return 0;
}
}