Use ILVariable as ldloca operand.

ICSharpCode.Decompiler/Ast/AstMethodBodyBuilder.cs

@@ -608,17 +608,9 @@ namespace Decompiler
 						AstBuilder.ConvertType(((FieldReference)operand).DeclaringType)
 						.Member(((FieldReference)operand).Name).WithAnnotation(operand));
 				case Code.Ldloc:
-					if (operand is ILVariable) {
-						return new Ast.IdentifierExpression(((ILVariable)operand).Name);
-					} else {
-						return new Ast.IdentifierExpression(((VariableDefinition)operand).Name);
-					}
+					return new Ast.IdentifierExpression(((ILVariable)operand).Name);
 				case Code.Ldloca:
-					if (operand is ILVariable) {
-						return MakeRef(new Ast.IdentifierExpression(((ILVariable)operand).Name));
-					} else {
-						return MakeRef(new Ast.IdentifierExpression(((VariableDefinition)operand).Name));
-					}
+					return MakeRef(new Ast.IdentifierExpression(((ILVariable)operand).Name));
 					case Code.Ldnull: return new Ast.NullReferenceExpression();
 					case Code.Ldobj: throw new NotImplementedException();
 					case Code.Ldstr: return new Ast.PrimitiveExpression(operand);

ICSharpCode.Decompiler/ILAst/ILAstBuilder.cs

@@ -262,11 +262,16 @@ namespace Decompiler
 					int index = ((VariableDefinition)byteCode.Operand).Index;
 					byteCode.Operand = Variables[index];
 					numReads[index]++;
-				}
-				if (byteCode.Code == ILCode.Stloc) {
+				} else if (byteCode.Code == ILCode.Stloc) {
 					int index = ((VariableDefinition)byteCode.Operand).Index;
 					byteCode.Operand = Variables[index];
 					numWrites[index]++;
+				} else if (byteCode.Code == ILCode.Ldloca) {
+					int index = ((VariableDefinition)byteCode.Operand).Index;
+					byteCode.Operand = Variables[index];
+					// ldloca leads to an unknown numbers of reads/writes, so ensure we don't inline the variable
+					numReads[index] += 2;
+					numWrites[index] += 2;
 				}
 			}
 			

ICSharpCode.Decompiler/ILAst/TypeAnalysis.cs

@@ -85,7 +85,7 @@ namespace Decompiler
 				case Code.Ldarg:
 					return ((ParameterReference)expr.Operand).ParameterType;
 				case Code.Ldloca:
-					return new ByReferenceType(((VariableDefinition)expr.Operand).VariableType);
+					return new ByReferenceType(((ILVariable)expr.Operand).Type);
 				case Code.Ldarga:
 					return new ByReferenceType(((ParameterReference)expr.Operand).ParameterType);
 					#endregion