small switch optimization

Xytabich · Nov 17, 2021 · 9532b1d · 9532b1d
1 parent 6169f26
commit 9532b1d
Showing 1 changed file with 8 additions and 4 deletions.
diff --git a/Assets/Katsudon/Builder/Opcodes/SwitchOpcode.cs b/Assets/Katsudon/Builder/Opcodes/SwitchOpcode.cs
@@ -1,4 +1,5 @@
-using System.Reflection.Emit;
+using System;
+using System.Reflection.Emit;
 using Katsudon.Builder.Externs;
 
 namespace Katsudon.Builder.AsmOpCodes
@@ -18,9 +19,12 @@ bool IOperationBuider.Process(IMethodDescriptor method)
 			IVariable condition = null;
 
 			indexVariable.Allocate();
-			CgeOpcode.ProcessOp(method, null, indexVariable, method.machine.GetConstVariable(0),
-				() => (condition = method.GetTmpVariable(typeof(bool))), out condition);
-			method.machine.AddBranch(condition, outLabel);
+			if(!NumberCodeUtils.IsUnsigned(Type.GetTypeCode(indexVariable.type)))
+			{
+				CgeOpcode.ProcessOp(method, null, indexVariable, method.machine.GetConstVariable(0),
+					() => (condition = method.GetTmpVariable(typeof(bool))), out condition);
+				method.machine.AddBranch(condition, outLabel);
+			}
 
 			var addressVariable = method.GetTmpVariable(typeof(uint)).Reserve();
 			method.machine.AddExtern(ConvertExtension.GetExternName(typeof(object), typeof(uint)), addressVariable, indexVariable.OwnType());