public void AddAggressiveDCEPass() => LLVM.AddAggressiveDCEPass(this.Unwrap());
/// <summary>
/// Compiles an IL assembly to LLVM bytecode.
/// </summary>
/// <param name="moduleName">The module name.</param>
public void Compile(string moduleName)
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
// Create LLVM module and its context.
LLVM.EnablePrettyStackTrace();
mModule = LLVM.ModuleCreateWithName(moduleName);
mContext = LLVM.GetModuleContext(mModule);
// Targets.
LLVM.InitializeAllTargetInfos();
LLVM.InitializeAllTargets();
LLVM.InitializeAllTargetMCs();
LLVM.InitializeAllAsmParsers();
LLVM.InitializeAllAsmPrinters();
string triplet = (Options.Target == "default") ? LLVM.GetDefaultTargetTriple() : Options.Target;
MyString error = new MyString();
LLVM.SetTarget(mModule, triplet);
TargetRef target;
if (LLVM.GetTargetFromTriple(triplet, out target, error))
{
throw new InvalidOperationException(error.ToString());
}
// Optimizer.
mFunctionPassManager = LLVM.CreateFunctionPassManagerForModule(mModule);
mPassManager = LLVM.CreatePassManager();
LLVM.InitializeFunctionPassManager(mFunctionPassManager);
#if !DEBUG
// O0
if (Options.Optimization >= OptimizationLevel.O0)
{
// Function passes.
LLVM.AddPromoteMemoryToRegisterPass(mFunctionPassManager);
LLVM.AddConstantPropagationPass(mFunctionPassManager);
LLVM.AddReassociatePass(mFunctionPassManager);
LLVM.AddInstructionCombiningPass(mFunctionPassManager);
// Module passes.
LLVM.AddAlwaysInlinerPass(mPassManager);
LLVM.AddStripDeadPrototypesPass(mPassManager);
LLVM.AddStripSymbolsPass(mPassManager);
}
// O1
if (Options.Optimization >= OptimizationLevel.O1)
{
// Function passes.
LLVM.AddLowerExpectIntrinsicPass(mFunctionPassManager);
LLVM.AddEarlyCSEPass(mFunctionPassManager);
LLVM.AddLoopRotatePass(mFunctionPassManager);
LLVM.AddLoopUnswitchPass(mFunctionPassManager);
LLVM.AddLoopUnrollPass(mFunctionPassManager);
LLVM.AddLoopDeletionPass(mFunctionPassManager);
LLVM.AddTailCallEliminationPass(mFunctionPassManager);
LLVM.AddGVNPass(mFunctionPassManager);
LLVM.AddDeadStoreEliminationPass(mFunctionPassManager);
LLVM.AddJumpThreadingPass(mFunctionPassManager);
LLVM.AddCFGSimplificationPass(mFunctionPassManager);
LLVM.AddMemCpyOptPass(mFunctionPassManager);
// Module passes.
LLVM.AddDeadArgEliminationPass(mPassManager);
LLVM.AddAggressiveDCEPass(mFunctionPassManager);
}
// O2
if (Options.Optimization >= OptimizationLevel.O2)
{
// Function passes.
LLVM.AddLoopVectorizePass(mFunctionPassManager);
LLVM.AddSLPVectorizePass(mFunctionPassManager);
// Module passes.
LLVM.AddFunctionInliningPass(mPassManager);
LLVM.AddConstantMergePass(mPassManager);
LLVM.AddArgumentPromotionPass(mPassManager);
}
#endif
// Initialize types and runtime.
string dataLayout = LLVM.GetDataLayout(Module);
TargetData = LLVM.CreateTargetData(dataLayout);
TypeHelper.Init(TargetData, this);
RuntimeHelper.ImportFunctions(Module);
mBuiltinCompiler.Compile();
compileModules();
LLVM.RunPassManager(mPassManager, Module);
// Log time.
stopWatch.Stop();
Logger.LogDetail("Compilation time: " + stopWatch.Elapsed);
// Debug: print LLVM assembly code.
#if DEBUG
Console.WriteLine(LLVM.PrintModuleToString(mModule));
#endif
// Verify and throw exception on error.
Console.ForegroundColor = ConsoleColor.DarkGray;
if (LLVM.VerifyModule(mModule, VerifierFailureAction.ReturnStatusAction, error))
{
Logger.LogError("Compilation of module failed.");
Logger.LogInfo(error.ToString());
LLVM.DisposeTargetData(TargetData);
return;
}
else
{
Logger.LogDetail("Compilation of module succeeded.");
}
// Output assembly or object file.
if (!Options.OutputLLVMIR && !Options.OutputLLVMBitCode)
{
TargetMachineRef machine = LLVM.CreateTargetMachine(target, triplet, "generic", "", CodeGenOptLevel.CodeGenLevelDefault, RelocMode.RelocDefault, CodeModel.CodeModelDefault);
LLVM.SetModuleDataLayout(mModule, LLVM.CreateTargetDataLayout(machine));
CodeGenFileType type = (Options.OutputAssembly) ? CodeGenFileType.AssemblyFile : CodeGenFileType.ObjectFile;
if (LLVM.TargetMachineEmitToFile(machine, mModule, Options.OutputFile, type, error))
{
throw new InvalidOperationException(error.ToString());
}
}
// Output LLVM IR code to a file.
else if (Options.OutputLLVMIR)
{
if (LLVM.PrintModuleToFile(mModule, Options.OutputFile, error))
{
Logger.LogError("Writing the LLVM code to a file failed.");
Logger.LogInfo(error.ToString());
}
}
// Output LLVM bitcode.
else if (Options.OutputLLVMBitCode)
{
if (LLVM.WriteBitcodeToFile(mModule, Options.OutputFile) != 0)
{
Logger.LogError("Writing the LLVM code to a file failed.");
Logger.LogInfo(error.ToString());
}
}
// Cleanup.
LLVM.DisposeTargetData(TargetData);
}
