- Worked on register allocator bug

Source/Mosa.Compiler.Framework/RegisterAllocator/BaseRegisterAllocator.cs

@@ -1544,12 +1544,17 @@ protected MoveKeyedList GetRegisterMoves()
 
 				foreach (var currentInterval in virtualRegister.LiveIntervals)
 				{
+					// No moves at block edges (these are done in the resolve move phase later)
 					if (blockEdges.ContainsKey(currentInterval.End))
 						continue;
 
 					// List is not sorted, so scan thru each one
 					foreach (var nextInterval in virtualRegister.LiveIntervals)
 					{
+						// same interval
+						if (currentInterval == nextInterval)
+							continue;
+
 						if (nextInterval.Start != currentInterval.End)
 							continue;
 
@@ -1562,6 +1567,18 @@ protected MoveKeyedList GetRegisterMoves()
 							nextInterval.AssignedOperand.Register == currentInterval.AssignedOperand.Register)
 							break;
 
+						// don't load from slot if next live interval starts with a def before use
+						if (nextInterval.DefPositions.Count != 0)
+						{
+							if (nextInterval.UsePositions.Count == 0)
+								continue;
+							else
+							{
+								if (nextInterval.LiveRange.FirstDef < nextInterval.LiveRange.FirstUse)
+									continue;
+							}
+						}
+
 						keyedList.Add(currentInterval.End, currentInterval.AssignedOperand, nextInterval.AssignedOperand);
 
 						break;

Source/Mosa.TinyCPUSimulator.TestSystem/TestCompiler.cs

@@ -73,7 +73,7 @@ protected void CompileTestCode()
 
 			Run<int>(string.Empty, "Default", "AssemblyInit", true);
 
-			simAdapter.SimCPU.Monitor.DebugOutput = true; // DEBUG OPTION
+			//simAdapter.SimCPU.Monitor.DebugOutput = true; // DEBUG OPTION
 		}
 
 		public T Run<T>(string ns, string type, string method, params object[] parameters)