#include "llvm/LLVMContext.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/Module.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/IRReader.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/TargetSelect.h"



@implementation AppDelegate

- (void)
applicationDidFinishLaunching: (NSNotification*) inNotification
{
    llvm::InitializeNativeTarget();

    //  Load the HelloWorld source…

    llvm::MemoryBuffer* progBuf = NULL;
    {
        NSURL* url = [[NSBundle mainBundle] URLForResource: @"HelloWorld" withExtension: @"llvm"];
        NSData* prog = [NSData dataWithContentsOfURL: url];
        if (prog == nil)
        {
            NSLog(@"Unable to open file '%@'", url.path);
            return;
        }

        llvm::StringRef sr((const char*) prog.bytes, prog.length);
        progBuf = llvm::MemoryBuffer::getMemBufferCopy(sr);
    }

    //  Assemble it…

    llvm::LLVMContext& llvmCTX = llvm::getGlobalContext();

    llvm::SMDiagnostic smd;
    llvm::Module* mod = new llvm::Module("helloWorldModule", llvmCTX);
    llvm::ParseAssembly(progBuf, mod, smd, llvmCTX);
    NSLog(@"Parse: %d:%d %s\n%s", smd.getLineNo(), smd.getColumnNo(), smd.getMessage().c_str(), smd.getLineContents().c_str());

    llvm::Module::global_iterator giter = mod->getGlobalList().begin();
    for (; giter != mod->getGlobalList().end(); ++giter)
    {
        NSLog(@"Global!");
    }

    //  Build an execution engine…

    llvm::EngineBuilder builder(mod);
    //builder.setEngineKind(llvm::EngineKind::Interpreter);

    llvm::ExecutionEngine* ee = builder.create();
    // ========= ee is always NULL :-(

    ee->runStaticConstructorsDestructors(false);

    llvm::Function* entryFunc = mod->getFunction("MyEntry");
    ee->getPointerToFunction(entryFunc);

    std::vector<llvm::GenericValue>     args;
    ee->runFunction(entryFunc, args);

    ee->runStaticConstructorsDestructors(true);
}

@end