static void Main(string[] args)
{
var context = new LLVMContext();
var module = new Module("NoName", context);
var builder = new IRBuilder(context);
var t = builder.getInt32Ty();
var funcType = FunctionType.get(t, false);
var main = Function.Create(funcType, GlobalValue.LinkageTypes.ExternalLinkage, "main", module);
var entry = BasicBlock.Create(context, "entrypoint", main);
builder.SetInsertPoint(entry);
var hello = builder.CreateGlobalStringPtr("Hello, World!");
var putsType = FunctionType.get(builder.getInt32Ty(),
new[] { builder.getInt8Ty().getPointerTo(0) }, false);
var putsFunc = module.getOrInsertFunction("puts", putsType);
builder.CreateCall(putsFunc, hello);
var variable = builder.CreateAlloca(t);
var val = ConstantInt.get(t, 127);
builder.CreateStore(val, variable);
builder.CreateRetVoid();
var pm = new PassManager();
var os = new raw_fd_ostream("code.ll");
pm.add(Passes.createPrintModulePass(os));
pm.run(module);
os.close();
Console.ReadKey();
}
public Function CodeGen(IRBuilder builder, PassManager passManager)
{
CodeGenManager.NamedValues.Clear();
Function func = this.Proto.CodeGen(builder);
if(func == null)
return null;
// Create a new basic block to start insertion into.
BasicBlock bb = func.AppendBasicBlock("entry");
builder.SetInsertPoint(bb);
Value retVal = Body.CodeGen(builder);
if(!retVal.IsNull)
{
builder.BuildReturn(retVal);
// Validate the generated code, checking for consistency.
func.Validate(LLVMVerifierFailureAction.PrintMessageAction);
// Optimize the function.
passManager.Run(func);
return func;
}
// Error reading body, remove function.
func.Delete();
return null;
}