public static LLVMPassManagerRef CreatePassManager(LLVMModuleRef module, OptimizationLevel optLevel)
{
var pass = module.CreateFunctionPassManager();
switch (optLevel)
{
case OptimizationLevel.None: break;
case OptimizationLevel.Basic:
{
pass.AddDeadStoreEliminationPass();
pass.AddInstructionCombiningPass();
pass.AddConstantPropagationPass();
pass.AddCFGSimplificationPass();
pass.AddIndVarSimplifyPass();
pass.AddReassociatePass();
pass.AddNewGVNPass();
goto case OptimizationLevel.None;
}
case OptimizationLevel.Moderate:
{
pass.AddLoopUnrollPass();
pass.AddLoopUnswitchPass();
pass.AddTailCallEliminationPass();
goto case OptimizationLevel.Basic;
}
case OptimizationLevel.Maximum:
{
pass.AddLoopVectorizePass();
goto case OptimizationLevel.Moderate;
}
default: throw new ArgumentOutOfRangeException();
}
pass.InitializeFunctionPassManager();
return(pass);
}
public static LLVMPassManagerRef CreatePassManager(LLVMModuleRef module, OptFlags flags)
{
var pass = module.CreateFunctionPassManager();
if ((flags & OptFlags.Reassociate) != 0)
{
pass.AddReassociatePass();
}
if ((flags & OptFlags.Vectorize) != 0)
{
pass.AddLoopVectorizePass();
}
if ((flags & OptFlags.CombineInstructions) != 0)
{
pass.AddInstructionCombiningPass();
}
if ((flags & OptFlags.RotateLoops) != 0)
{
pass.AddLoopRotatePass();
}
if ((flags & OptFlags.UnrollLoops) != 0)
{
pass.AddLoopUnrollPass();
}
if ((flags & OptFlags.UnswitchLoops) != 0)
{
pass.AddLoopUnswitchPass();
}
if ((flags & OptFlags.CanonicalizeInductionVariables) != 0)
{
pass.AddIndVarSimplifyPass();
}
if ((flags & OptFlags.DeleteUnusedLoops) != 0)
{
pass.AddLoopDeletionPass();
}
if ((flags & OptFlags.GlobalValueNumbering) != 0)
{
pass.AddNewGVNPass();
}
if ((flags & OptFlags.OptimizeMemCpy) != 0)
{
pass.AddMemCpyOptPass();
}
if ((flags & OptFlags.SimplifyControlFlowGraph) != 0)
{
pass.AddCFGSimplificationPass();
}
pass.InitializeFunctionPassManager();
return(pass);
}