Extend TransformAssignment

ICSharpCode.Decompiler/CSharp/CSharpDecompiler.cs

@@ -59,7 +59,7 @@ namespace ICSharpCode.Decompiler.CSharp
 				new IntroduceExitPoints(),
 				new ConditionDetection(),
 				new ILInlining(),
-				new TransformInlineAssignment(),
+				new TransformAssignment(),
 				new CopyPropagation(),
 				new InlineCompilerGeneratedVariables(),
 				new ExpressionTransforms(), // must run once before "the loop" to allow RemoveDeadVariablesInit

ICSharpCode.Decompiler/CSharp/ExpressionBuilder.cs

@@ -601,21 +601,21 @@ namespace ICSharpCode.Decompiler.CSharp
 		{
 			switch (inst.Operator) {
 				case BinaryNumericOperator.Add:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.Add);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.Add);
 				case BinaryNumericOperator.Sub:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.Subtract);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.Subtract);
 				case BinaryNumericOperator.Mul:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.Multiply);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.Multiply);
 				case BinaryNumericOperator.Div:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.Divide);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.Divide);
 				case BinaryNumericOperator.Rem:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.Modulus);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.Modulus);
 				case BinaryNumericOperator.BitAnd:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.BitwiseAnd);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.BitwiseAnd);
 				case BinaryNumericOperator.BitOr:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.BitwiseOr);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.BitwiseOr);
 				case BinaryNumericOperator.BitXor:
-					return HandleCompoundAssigment(inst, AssignmentOperatorType.ExclusiveOr);
+					return HandleCompoundAssignment(inst, AssignmentOperatorType.ExclusiveOr);
 				case BinaryNumericOperator.ShiftLeft:
 					return HandleCompoundShift(inst, AssignmentOperatorType.ShiftLeft);
 				case BinaryNumericOperator.ShiftRight:
@@ -625,7 +625,7 @@ namespace ICSharpCode.Decompiler.CSharp
 			}
 		}
 		
-		TranslatedExpression HandleCompoundAssigment(CompoundAssignmentInstruction inst, AssignmentOperatorType op)
+		TranslatedExpression HandleCompoundAssignment(CompoundAssignmentInstruction inst, AssignmentOperatorType op)
 		{
 			var resolverWithOverflowCheck = resolver.WithCheckForOverflow(inst.CheckForOverflow);
 			var target = Translate(inst.Target);
@@ -644,9 +644,18 @@ namespace ICSharpCode.Decompiler.CSharp
 				value = value.ConvertTo(targetType, this);
 				rr = resolverWithOverflowCheck.ResolveAssignment(op, target.ResolveResult, value.ResolveResult);
 			}
-			var resultExpr = new AssignmentExpression(target.Expression, op, value.Expression)
-				.WithILInstruction(inst)
-				.WithRR(rr);
+			TranslatedExpression resultExpr;
+			if (inst.CompoundAssignmentType == CompoundAssignmentType.EvaluatesToOldValue) {
+				Debug.Assert(op == AssignmentOperatorType.Add || op == AssignmentOperatorType.Subtract);
+				Debug.Assert(value.ResolveResult.IsCompileTimeConstant && 1.Equals(value.ResolveResult.ConstantValue));
+				resultExpr = new UnaryOperatorExpression(op == AssignmentOperatorType.Add ? UnaryOperatorType.PostIncrement : UnaryOperatorType.PostDecrement, target)
+					.WithILInstruction(inst)
+					.WithRR(rr);
+			} else {
+				resultExpr = new AssignmentExpression(target.Expression, op, value.Expression)
+					.WithILInstruction(inst)
+					.WithRR(rr);
+			}
 			if (AssignmentOperatorMightCheckForOverflow(op))
 				resultExpr.Expression.AddAnnotation(inst.CheckForOverflow ? AddCheckedBlocks.CheckedAnnotation : AddCheckedBlocks.UncheckedAnnotation);
 			return resultExpr;
@@ -1290,6 +1299,8 @@ namespace ICSharpCode.Decompiler.CSharp
 			switch (block.Type) {
 				case BlockType.ArrayInitializer:
 					return TranslateArrayInitializer(block);
+				case BlockType.CompoundOperator:
+					return TranslateCompoundOperator(block);
 				default:
 					return base.VisitBlock(block);
 			}
@@ -1355,6 +1366,19 @@ namespace ICSharpCode.Decompiler.CSharp
 				.WithRR(new ArrayCreateResolveResult(new ArrayType(compilation, type, dimensions), newArr.Indices.Select(i => Translate(i).ResolveResult).ToArray(), elementResolveResults));
 		}
 		
+		TranslatedExpression TranslateCompoundOperator(Block block)
+		{
+			var targetInst = (block.Instructions.ElementAtOrDefault(0) as StLoc)?.Value;
+			var inst = (block.Instructions.ElementAtOrDefault(1) as StLoc)?.Value as BinaryNumericInstruction;
+			if (targetInst == null || inst == null || (inst.Operator != BinaryNumericOperator.Add && inst.Operator != BinaryNumericOperator.Sub))
+				throw new ArgumentException("given Block is invalid!");
+			var op = inst.Operator == BinaryNumericOperator.Add ? UnaryOperatorType.PostIncrement : UnaryOperatorType.PostDecrement;
+			var target = Translate(targetInst);
+			return new UnaryOperatorExpression(op, target)
+				.WithILInstruction(block)
+				.WithRR(resolver.WithCheckForOverflow(inst.CheckForOverflow).ResolveUnaryOperator(op, target.ResolveResult));
+		}
+		
 		protected internal override TranslatedExpression VisitIfInstruction(IfInstruction inst)
 		{
 			var condition = TranslateCondition(inst.Condition);

ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj

@@ -153,7 +153,7 @@
     <Compile Include="IL\InstructionOutputExtensions.cs" />
     <Compile Include="IL\PrimitiveType.cs" />
     <Compile Include="IL\StackType.cs" />
-    <Compile Include="IL\Transforms\TransformInlineAssignment.cs" />
+    <Compile Include="IL\Transforms\TransformAssignment.cs" />
     <Compile Include="NRExtensions.cs" />
     <Compile Include="Output\ITextOutput.cs" />
     <Compile Include="Output\PlainTextOutput.cs" />

ICSharpCode.Decompiler/IL/Instructions/ILInstruction.cs

@@ -609,6 +609,11 @@ namespace ICSharpCode.Decompiler.IL
 		}
 	}
 	
+	public interface IInstructionWithTypeOperand
+	{
+		ICSharpCode.NRefactory.TypeSystem.IType Type { get; }
+	}
+	
 	public interface IInstructionWithFieldOperand
 	{
 		ICSharpCode.NRefactory.TypeSystem.IField Field { get; }

ICSharpCode.Decompiler/IL/Transforms/CopyPropagation.cs

@@ -97,7 +97,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 					}
 				default:
 					// All instructions without special behavior that target a stack-variable can be copied.
-					return value.DirectFlags == InstructionFlags.None && target.Kind == VariableKind.StackSlot;
+					return value.Flags == InstructionFlags.None && value.Children.Count == 0 && target.Kind == VariableKind.StackSlot;
 			}
 		}
 	}

ICSharpCode.Decompiler/IL/Transforms/ILInlining.cs

@@ -254,6 +254,8 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 					return true;
 				case OpCode.StObj:
 					return true;
+				case OpCode.CompoundAssignmentInstruction:
+					return true;
 			}
 			
 			// decide based on the target into which we are inlining

ICSharpCode.Decompiler/IL/Transforms/TransformAssignment.cs

@@ -0,0 +1,265 @@
+// Copyright (c) 2015 Siegfried Pammer
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using ICSharpCode.NRefactory.TypeSystem;
+using ICSharpCode.NRefactory.TypeSystem.Implementation;
+
+namespace ICSharpCode.Decompiler.IL.Transforms
+{
+	/// <summary>
+	/// Description of TransformAssignment.
+	/// </summary>
+	public class TransformAssignment : IILTransform
+	{
+		ILTransformContext context;
+		
+		void IILTransform.Run(ILFunction function, ILTransformContext context)
+		{
+			this.context = context;
+			foreach (var block in function.Descendants.OfType<Block>()) {
+				for (int i = block.Instructions.Count - 1; i >= 0; i--) {
+					if (TransformPostIncDecOperatorOnAddress(block, i) || TransformCSharp4PostIncDecOperatorOnAddress(block, i)) {
+						block.Instructions.RemoveAt(i);
+						continue;
+					}
+					if (InlineLdAddressUsages(block, i)) {
+						block.Instructions.RemoveAt(i);
+						continue;
+					}
+					if (TransformPostIncDecOperator(block, i, function)) {
+						block.Instructions.RemoveAt(i);
+						continue;
+					}
+					TransformInlineAssignmentStObj(block, i);
+				}
+			}
+		}
+
+		/// <code>
+		/// stloc s(value)
+		/// stloc l(ldloc s)
+		/// stobj(..., ldloc s)
+		/// -->
+		/// stloc l(stobj (..., value))
+		/// </code>
+		/// -or-
+		/// <code>
+		/// stloc s(value)
+		/// stobj (..., ldloc s)
+		/// -->
+		/// stloc s(stobj (..., value))
+		/// </code>
+		static void TransformInlineAssignmentStObj(Block block, int i)
+		{
+			var inst = block.Instructions[i] as StLoc;
+			if (inst == null || inst.Variable.Kind != VariableKind.StackSlot)
+				return;
+			var nextInst = block.Instructions.ElementAtOrDefault(i + 1);
+			ILInstruction value;
+			StObj fieldStore;
+			ILVariable local;
+			if (nextInst is StLoc) { // instance fields
+				var localStore = (StLoc)nextInst;
+				fieldStore = block.Instructions.ElementAtOrDefault(i + 2) as StObj;
+				if (fieldStore == null) { // otherwise it must local
+					TransformInlineAssignmentLocal(block, i);
+					return;
+				}
+				if (localStore.Variable.Kind == VariableKind.StackSlot || !localStore.Value.MatchLdLoc(inst.Variable) || !fieldStore.Value.MatchLdLoc(inst.Variable))
+					return;
+				value = inst.Value;
+				local = localStore.Variable;
+				block.Instructions.RemoveAt(i + 1);
+			} else if (nextInst is StObj) { // static fields
+				fieldStore = (StObj)nextInst;
+				if (!fieldStore.Value.MatchLdLoc(inst.Variable))
+					return;
+				value = inst.Value;
+				local = inst.Variable;
+			} else return;
+			block.Instructions.RemoveAt(i + 1);
+			inst.ReplaceWith(new StLoc(local, new StObj(fieldStore.Target, value, fieldStore.Type)));
+		}
+
+		/// <code>
+		/// stloc s(value)
+		/// stloc l(ldloc s)
+		/// -->
+		/// stloc s(stloc l(value))
+		/// </code>
+		static void TransformInlineAssignmentLocal(Block block, int i)
+		{
+			var inst = block.Instructions[i] as StLoc;
+			var nextInst = block.Instructions.ElementAtOrDefault(i + 1) as StLoc;
+			if (inst == null || nextInst == null)
+				return;
+			if (nextInst.Variable.Kind == VariableKind.StackSlot || !nextInst.Value.MatchLdLoc(inst.Variable))
+				return;
+			var value = inst.Value;
+			var var = nextInst.Variable;
+			var stackVar = inst.Variable;
+			block.Instructions.RemoveAt(i);
+			nextInst.ReplaceWith(new StLoc(stackVar, new StLoc(var, value)));
+		}
+		
+		/// ldaddress ::= ldelema | ldflda | ldsflda;
+		/// <code>
+		/// stloc s(ldaddress)
+		/// usages of ldobj(ldloc s) or stobj(ldloc s, ...) in next instruction
+		/// -->
+		/// use ldaddress instead of ldloc s
+		/// </code>
+		static bool InlineLdAddressUsages(Block block, int i)
+		{
+			var inst = block.Instructions[i] as StLoc;
+			if (inst == null || inst.Variable.Kind != VariableKind.StackSlot || !(inst.Value is LdElema || inst.Value is LdFlda || inst.Value is LdsFlda))
+				return false;
+			var valueToCopy = inst.Value;
+			var nextInstruction = inst.Parent.Children.ElementAtOrDefault(inst.ChildIndex + 1);
+			if (nextInstruction == null)
+				return false;
+			var affectedUsages = block.Descendants
+				.OfType<IInstructionWithVariableOperand>()
+				.Where(ins => ins != inst)
+				.Where(ins => ins.Variable == inst.Variable)
+				.Cast<ILInstruction>().ToArray();
+			if (affectedUsages.Length == 0 || affectedUsages.Any(ins => !(ins.Parent is StObj || ins.Parent is LdObj)))
+				return false;
+			foreach (var usage in affectedUsages) {
+				usage.ReplaceWith(valueToCopy.Clone());
+			}
+			return true;
+		}
+		
+		/// <code>
+		/// stloc s(ldloc l)
+		/// stloc l(binary.op(ldloc s, ldc.i4 1))
+		/// -->
+		/// stloc s(block {
+		/// 	stloc s2(ldloc l)
+		/// 	stloc l(binary.op(ldloc s2, ldc.i4 1))
+		/// 	final: ldloc s2
+		/// })
+		/// </code>
+		static bool TransformPostIncDecOperator(Block block, int i, ILFunction function)
+		{
+			var inst = block.Instructions[i] as StLoc;
+			var nextInst = block.Instructions.ElementAtOrDefault(i + 1) as StLoc;
+			if (inst == null || nextInst == null)
+				return false;
+			var binary = nextInst.Value as BinaryNumericInstruction;
+			if (inst.Variable.Kind != VariableKind.StackSlot || nextInst.Variable.Kind == VariableKind.StackSlot || binary == null)
+				return false;
+			if ((binary.Operator != BinaryNumericOperator.Add && binary.Operator != BinaryNumericOperator.Sub) || !binary.Left.MatchLdLoc(inst.Variable) || !binary.Right.MatchLdcI4(1))
+				return false;
+			var tempStore = function.RegisterVariable(VariableKind.StackSlot, inst.Variable.Type);
+			var assignment = new Block(BlockType.CompoundOperator);
+			assignment.Instructions.Add(new StLoc(tempStore, new LdLoc(nextInst.Variable)));
+			assignment.Instructions.Add(new StLoc(nextInst.Variable, new BinaryNumericInstruction(binary.Operator, new LdLoc(tempStore), new LdcI4(1), binary.CheckForOverflow, binary.Sign)));
+			assignment.FinalInstruction = new LdLoc(tempStore);
+			nextInst.ReplaceWith(new StLoc(inst.Variable, assignment));
+			return true;
+		}
+		
+		/// ldaddress ::= ldelema | ldflda | ldsflda;
+		/// <code>
+		/// stloc s(ldaddress)
+		/// stloc l(ldobj(ldloc s))
+		/// stobj(ldloc s, binary.op(ldloc l, ldc.i4 1))
+		/// -->
+		/// stloc l(compound.op.old(ldobj(ldaddress), ldc.i4 1))
+		/// </code>
+		static bool TransformPostIncDecOperatorOnAddress(Block block, int i)
+		{
+			var inst = block.Instructions[i] as StLoc;
+			var nextInst = block.Instructions.ElementAtOrDefault(i + 1) as StLoc;
+			var stobj = block.Instructions.ElementAtOrDefault(i + 2) as StObj;
+			if (inst == null || nextInst == null || stobj == null)
+				return false;
+			if (!(inst.Value is LdElema || inst.Value is LdFlda || inst.Value is LdsFlda))
+				return false;
+			ILInstruction target;
+			IType targetType;
+			if (nextInst.Variable.Kind == VariableKind.StackSlot || !nextInst.Value.MatchLdObj(out target, out targetType) || !target.MatchLdLoc(inst.Variable))
+				return false;
+			if (!stobj.Target.MatchLdLoc(inst.Variable))
+				return false;
+			var binary = stobj.Value as BinaryNumericInstruction;
+			if (binary == null || !binary.Left.MatchLdLoc(nextInst.Variable) || !binary.Right.MatchLdcI4(1)
+			    || (binary.Operator != BinaryNumericOperator.Add && binary.Operator != BinaryNumericOperator.Sub))
+				return false;
+			var assignment = new CompoundAssignmentInstruction(binary.Operator, new LdObj(inst.Value, targetType), binary.Right, binary.CheckForOverflow, binary.Sign, CompoundAssignmentType.EvaluatesToOldValue);
+			stobj.ReplaceWith(new StLoc(nextInst.Variable, assignment));
+			block.Instructions.RemoveAt(i + 1);
+			return true;
+		}
+		
+		/// <code>
+		/// stloc s(ldflda)
+		/// stloc s2(ldobj(ldflda(ldloc s)))
+		/// stloc l(ldloc s2)
+		/// stobj (ldflda(ldloc s), binary.add(ldloc s2, ldc.i4 1))
+		/// -->
+		/// stloc l(compound.op.old(ldobj(ldflda(ldflda)), ldc.i4 1))
+		/// </code>
+		static bool TransformCSharp4PostIncDecOperatorOnAddress(Block block, int i)
+		{
+			var baseFieldAddress = block.Instructions[i] as StLoc;
+			var fieldValue = block.Instructions.ElementAtOrDefault(i + 1) as StLoc;
+			var fieldValueCopyToLocal = block.Instructions.ElementAtOrDefault(i + 2) as StLoc;
+			var stobj = block.Instructions.ElementAtOrDefault(i + 3) as StObj;
+			if (baseFieldAddress == null || fieldValue == null || fieldValueCopyToLocal == null || stobj == null)
+				return false;
+			if (baseFieldAddress.Variable.Kind != VariableKind.StackSlot || fieldValue.Variable.Kind != VariableKind.StackSlot || fieldValueCopyToLocal.Variable.Kind != VariableKind.Local)
+				return false;
+			IType t;
+			IField targetField;
+			ILInstruction targetFieldLoad, baseFieldAddressLoad2;
+			if (!fieldValue.Value.MatchLdObj(out targetFieldLoad, out t))
+				return false;
+			ILInstruction baseAddress;
+			if (baseFieldAddress.Value is LdFlda) {
+				IField targetField2;
+				ILInstruction baseFieldAddressLoad3;
+				if (!targetFieldLoad.MatchLdFlda(out baseFieldAddressLoad2, out targetField) || !baseFieldAddressLoad2.MatchLdLoc(baseFieldAddress.Variable))
+					return false;
+				if (!stobj.Target.MatchLdFlda(out baseFieldAddressLoad3, out targetField2) || !baseFieldAddressLoad3.MatchLdLoc(baseFieldAddress.Variable) || !targetField.Equals(targetField2))
+					return false;
+				baseAddress = new LdFlda(baseFieldAddress.Value, targetField);
+			} else if (baseFieldAddress.Value is LdElema) {
+				if (!targetFieldLoad.MatchLdLoc(baseFieldAddress.Variable) || !stobj.Target.MatchLdLoc(baseFieldAddress.Variable))
+					return false;
+				baseAddress = baseFieldAddress.Value;
+			} else {
+				return false;
+			}
+			BinaryNumericInstruction binary = stobj.Value as BinaryNumericInstruction;
+			if (binary == null || !binary.Left.MatchLdLoc(fieldValue.Variable) || !binary.Right.MatchLdcI4(1)
+			    || (binary.Operator != BinaryNumericOperator.Add && binary.Operator != BinaryNumericOperator.Sub))
+				return false;
+			var assignment = new CompoundAssignmentInstruction(binary.Operator, new LdObj(baseAddress, t), binary.Right, binary.CheckForOverflow, binary.Sign, CompoundAssignmentType.EvaluatesToOldValue);
+			stobj.ReplaceWith(new StLoc(fieldValueCopyToLocal.Variable, assignment));
+			block.Instructions.RemoveAt(i + 2);
+			block.Instructions.RemoveAt(i + 1);
+			return true;
+		}
+	}
+}

ICSharpCode.Decompiler/IL/Transforms/TransformInlineAssignment.cs

@@ -1,142 +0,0 @@
-// Copyright (c) 2015 Siegfried Pammer
-// 
-// Permission is hereby granted, free of charge, to any person obtaining a copy of this
-// software and associated documentation files (the "Software"), to deal in the Software
-// without restriction, including without limitation the rights to use, copy, modify, merge,
-// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
-// to whom the Software is furnished to do so, subject to the following conditions:
-// 
-// The above copyright notice and this permission notice shall be included in all copies or
-// substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
-// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
-// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
-// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-// DEALINGS IN THE SOFTWARE.
-
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using ICSharpCode.NRefactory.TypeSystem;
-using ICSharpCode.NRefactory.TypeSystem.Implementation;
-
-namespace ICSharpCode.Decompiler.IL.Transforms
-{
-	/// <summary>
-	/// Description of TransformInlineAssignment.
-	/// </summary>
-	public class TransformInlineAssignment : IILTransform
-	{
-		ILTransformContext context;
-		
-		void IILTransform.Run(ILFunction function, ILTransformContext context)
-		{
-			this.context = context;
-			foreach (var block in function.Descendants.OfType<Block>()) {
-				for (int i = block.Instructions.Count - 1; i >= 0; i--) {
-					if (InlineLdAddressUsages(block, i)) {
-						block.Instructions.RemoveAt(i);
-						continue;
-					}
-					TransformInlineAssignmentStObj(block, i);
-				}
-			}
-		}
-
-		/// <code>
-		/// stloc s(value)
-		/// stloc l(ldloc s)
-		/// stobj(..., ldloc s)
-		/// -->
-		/// stloc l(stobj (..., value))
-		/// </code>
-		/// -or-
-		/// <code>
-		/// stloc s(value)
-		/// stobj (..., ldloc s)
-		/// -->
-		/// stloc s(stobj (..., value))
-		/// </code>
-		static void TransformInlineAssignmentStObj(Block block, int i)
-		{
-			var inst = block.Instructions[i] as StLoc;
-			if (inst == null || inst.Variable.Kind != VariableKind.StackSlot)
-				return;
-			var nextInst = block.Instructions.ElementAtOrDefault(i + 1);
-			ILInstruction value;
-			StObj fieldStore;
-			ILVariable local;
-			if (nextInst is StLoc) { // instance fields
-				var localStore = (StLoc)nextInst;
-				fieldStore = block.Instructions.ElementAtOrDefault(i + 2) as StObj;
-				if (fieldStore == null) { // otherwise it must local
-					TransformInlineAssignmentLocal(block, i);
-					return;
-				}
-				if (localStore.Variable.Kind == VariableKind.StackSlot || !localStore.Value.MatchLdLoc(inst.Variable) || !fieldStore.Value.MatchLdLoc(inst.Variable))
-					return;
-				value = inst.Value;
-				local = localStore.Variable;
-				block.Instructions.RemoveAt(i + 1);
-			} else if (nextInst is StObj) { // static fields
-				fieldStore = (StObj)nextInst;
-				if (!fieldStore.Value.MatchLdLoc(inst.Variable))
-					return;
-				value = inst.Value;
-				local = inst.Variable;
-			} else return;
-			block.Instructions.RemoveAt(i + 1);
-			inst.ReplaceWith(new StLoc(local, new StObj(fieldStore.Target, value, fieldStore.Type)));
-		}
-
-		/// <code>
-		/// stloc s(value)
-		/// stloc l(ldloc s)
-		/// -->
-		/// stloc s(stloc l(value))
-		/// </code>
-		static void TransformInlineAssignmentLocal(Block block, int i)
-		{
-			var inst = block.Instructions[i] as StLoc;
-			var nextInst = block.Instructions.ElementAtOrDefault(i + 1) as StLoc;
-			if (inst == null || nextInst == null)
-				return;
-			if (nextInst.Variable.Kind == VariableKind.StackSlot || !nextInst.Value.MatchLdLoc(inst.Variable))
-				return;
-			var value = inst.Value;
-			var var = nextInst.Variable;
-			var stackVar = inst.Variable;
-			block.Instructions.RemoveAt(i);
-			nextInst.ReplaceWith(new StLoc(stackVar, new StLoc(var, value)));
-		}
-		
-		/// ldaddress ::= ldelema | ldflda | ldsflda;
-		/// <code>
-		/// stloc s(ldaddress)
-		/// usages of ldobj(ldloc s) or stobj(ldloc s, ...) in next instruction
-		/// -->
-		/// use ldaddress instead of ldloc s
-		/// </code>
-		static bool InlineLdAddressUsages(Block block, int i)
-		{
-			var inst = block.Instructions[i] as StLoc;
-			if (inst == null || inst.Variable.Kind != VariableKind.StackSlot || !(inst.Value is LdElema || inst.Value is LdFlda || inst.Value is LdsFlda))
-				return false;
-			var valueToCopy = inst.Value;
-			var nextInstruction = inst.Parent.Children.ElementAtOrDefault(inst.ChildIndex + 1);
-			if (nextInstruction == null)
-				return false;
-			var affectedUsages = nextInstruction.Descendants
-				.OfType<IInstructionWithVariableOperand>().Where(ins => ins.Variable == inst.Variable)
-				.Cast<ILInstruction>().ToArray();
-			if (affectedUsages.Length == 0 || affectedUsages.Any(ins => !(ins.Parent is StObj || ins.Parent is LdObj)))
-				return false;
-			foreach (var usage in affectedUsages) {
-				usage.ReplaceWith(valueToCopy.Clone());
-			}
-			return true;
-		}
-	}
-}

ICSharpCode.Decompiler/Tests/TestCases/Pretty/CompoundAssignmentTest.cs

@@ -37,15 +37,70 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 			
 		}
 		
-		public void Integer(int i)
+		public void Int32_Local_Add(int i)
 		{
-			int V_0 = 0;
-			if (i > 5) {
-				V_0 += i;
-			}
-			else {
-				V_0 -= i;
-			}
+			i++;
+			Console.WriteLine(i++);
+			Console.WriteLine(++i);
+			i += 5;
+			Console.WriteLine(i += 5);
+		}
+		
+		public void Int32_Local_Sub(int i)
+		{
+			i--;
+			Console.WriteLine(i--);
+			Console.WriteLine(--i);
+			i -= 5;
+			Console.WriteLine(i -= 5);
+		}
+		
+		public void Int32_Local_Mul(int i)
+		{
+			i *= 5;
+			Console.WriteLine(i *= 5);
+		}
+		
+		public void Int32_Local_Div(int i)
+		{
+			i /= 5;
+			Console.WriteLine(i /= 5);
+		}
+		
+		public void Int32_Local_Rem(int i)
+		{
+			i %= 5;
+			Console.WriteLine(i %= 5);
+		}
+		
+		public void Int32_Local_BitAnd(int i)
+		{
+			i &= 5;
+			Console.WriteLine(i &= 5);
+		}
+		
+		public void Int32_Local_BitOr(int i)
+		{
+			i |= 5;
+			Console.WriteLine(i |= 5);
+		}
+		
+		public void Int32_Local_BitXor(int i)
+		{
+			i ^= 5;
+			Console.WriteLine(i ^= 5);
+		}
+		
+		public void Int32_Local_ShiftLeft(int i)
+		{
+			i <<= 5;
+			Console.WriteLine(i <<= 5);
+		}
+		
+		public void Int32_Local_ShiftRight(int i)
+		{
+			i >>= 5;
+			Console.WriteLine(i >>= 5);
 		}
 		
 		public void IntegerWithInline(int i)
@@ -68,11 +123,30 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 			Console.WriteLine(this.array1[i * 2] += i * 2);
 		}
 		
+		public int GetIndex()
+		{
+			return new Random().Next(0, 100);
+		}
+		
+		public int[] GetArray()
+		{
+			throw new NotImplementedException();
+		}
+		
+		public int GetValue(int value)
+		{
+			return value;
+		}
+		
+		public int ArrayUsageWithMethods()
+		{
+			return this.GetArray()[this.GetIndex()]++;
+		}
 		
 		public void NestedField()
 		{
 			if (this.field1.HasIndex) {
-				this.field1.Field++;
+				Console.WriteLine(this.field1.Field++);
 			}
 		}
 	}

ICSharpCode.Decompiler/Tests/TestCases/Pretty/CompoundAssignmentTest.il

@@ -10,7 +10,7 @@
   .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
   .ver 4:0:0:0
 }
-.assembly s32trvk2
+.assembly kb1brdcl
 {
   .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilationRelaxationsAttribute::.ctor(int32) = ( 01 00 08 00 00 00 00 00 ) 
   .custom instance void [mscorlib]System.Runtime.CompilerServices.RuntimeCompatibilityAttribute::.ctor() = ( 01 00 01 00 54 02 16 57 72 61 70 4E 6F 6E 45 78   // ....T..WrapNonEx
@@ -20,15 +20,15 @@
   .hash algorithm 0x00008004
   .ver 0:0:0:0
 }
-.module s32trvk2.exe
-// MVID: {09E6012F-15AE-4E0C-B48E-2644E4707595}
+.module kb1brdcl.exe
+// MVID: {FA9A1DD3-2F44-4DB4-BC5E-6EF79C457314}
 .custom instance void [mscorlib]System.Security.UnverifiableCodeAttribute::.ctor() = ( 01 00 00 00 ) 
 .imagebase 0x00400000
 .file alignment 0x00000200
 .stackreserve 0x00100000
 .subsystem 0x0003       // WINDOWS_CUI
 .corflags 0x00000001    //  ILONLY
-// Image base: 0x01510000
+// Image base: 0x01190000
 
 
 // =============== CLASS MEMBERS DECLARATION ===================
@@ -56,40 +56,240 @@
   } // end of method CompoundAssignmentTest::Main
 
   .method public hidebysig instance void 
-          Integer(int32 i) cil managed
+          Int32_Local_Add(int32 i) cil managed
   {
-    // Code size       29 (0x1d)
-    .maxstack  2
-    .locals init (int32 V_0,
-             bool V_1)
+    // Code size       48 (0x30)
+    .maxstack  8
     IL_0000:  nop
-    IL_0001:  ldc.i4.0
-    IL_0002:  stloc.0
-    IL_0003:  ldarg.1
-    IL_0004:  ldc.i4.5
-    IL_0005:  cgt
-    IL_0007:  ldc.i4.0
-    IL_0008:  ceq
-    IL_000a:  stloc.1
-    IL_000b:  ldloc.1
-    IL_000c:  brtrue.s   IL_0016
-
-    IL_000e:  nop
-    IL_000f:  ldloc.0
-    IL_0010:  ldarg.1
-    IL_0011:  add
-    IL_0012:  stloc.0
-    IL_0013:  nop
-    IL_0014:  br.s       IL_001c
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.1
+    IL_0003:  add
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  dup
+    IL_0008:  ldc.i4.1
+    IL_0009:  add
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ldarg.1
+    IL_0013:  ldc.i4.1
+    IL_0014:  add
+    IL_0015:  dup
+    IL_0016:  starg.s    i
+    IL_0018:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_001d:  nop
+    IL_001e:  ldarg.1
+    IL_001f:  ldc.i4.5
+    IL_0020:  add
+    IL_0021:  starg.s    i
+    IL_0023:  ldarg.1
+    IL_0024:  ldc.i4.5
+    IL_0025:  add
+    IL_0026:  dup
+    IL_0027:  starg.s    i
+    IL_0029:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_002e:  nop
+    IL_002f:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_Add
+
+  .method public hidebysig instance void 
+          Int32_Local_Sub(int32 i) cil managed
+  {
+    // Code size       48 (0x30)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.1
+    IL_0003:  sub
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  dup
+    IL_0008:  ldc.i4.1
+    IL_0009:  sub
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ldarg.1
+    IL_0013:  ldc.i4.1
+    IL_0014:  sub
+    IL_0015:  dup
+    IL_0016:  starg.s    i
+    IL_0018:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_001d:  nop
+    IL_001e:  ldarg.1
+    IL_001f:  ldc.i4.5
+    IL_0020:  sub
+    IL_0021:  starg.s    i
+    IL_0023:  ldarg.1
+    IL_0024:  ldc.i4.5
+    IL_0025:  sub
+    IL_0026:  dup
+    IL_0027:  starg.s    i
+    IL_0029:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_002e:  nop
+    IL_002f:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_Sub
+
+  .method public hidebysig instance void 
+          Int32_Local_Mul(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  mul
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  mul
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_Mul
+
+  .method public hidebysig instance void 
+          Int32_Local_Div(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  div
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  div
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_Div
 
-    IL_0016:  nop
-    IL_0017:  ldloc.0
-    IL_0018:  ldarg.1
-    IL_0019:  sub
-    IL_001a:  stloc.0
-    IL_001b:  nop
-    IL_001c:  ret
-  } // end of method CompoundAssignmentTest::Integer
+  .method public hidebysig instance void 
+          Int32_Local_Rem(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  rem
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  rem
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_Rem
+
+  .method public hidebysig instance void 
+          Int32_Local_BitAnd(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  and
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  and
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_BitAnd
+
+  .method public hidebysig instance void 
+          Int32_Local_BitOr(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  or
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  or
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_BitOr
+
+  .method public hidebysig instance void 
+          Int32_Local_BitXor(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  xor
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  xor
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_BitXor
+
+  .method public hidebysig instance void 
+          Int32_Local_ShiftLeft(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  shl
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  shl
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_ShiftLeft
+
+  .method public hidebysig instance void 
+          Int32_Local_ShiftRight(int32 i) cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  ldc.i4.5
+    IL_0003:  shr
+    IL_0004:  starg.s    i
+    IL_0006:  ldarg.1
+    IL_0007:  ldc.i4.5
+    IL_0008:  shr
+    IL_0009:  dup
+    IL_000a:  starg.s    i
+    IL_000c:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_0011:  nop
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::Int32_Local_ShiftRight
 
   .method public hidebysig instance void 
           IntegerWithInline(int32 i) cil managed
@@ -192,12 +392,85 @@
     IL_0049:  ret
   } // end of method CompoundAssignmentTest::Array
 
+  .method public hidebysig instance int32 
+          GetIndex() cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  3
+    .locals init (int32 V_0)
+    IL_0000:  nop
+    IL_0001:  newobj     instance void [mscorlib]System.Random::.ctor()
+    IL_0006:  ldc.i4.0
+    IL_0007:  ldc.i4.s   100
+    IL_0009:  callvirt   instance int32 [mscorlib]System.Random::Next(int32,
+                                                                      int32)
+    IL_000e:  stloc.0
+    IL_000f:  br.s       IL_0011
+
+    IL_0011:  ldloc.0
+    IL_0012:  ret
+  } // end of method CompoundAssignmentTest::GetIndex
+
+  .method public hidebysig instance int32[] 
+          GetArray() cil managed
+  {
+    // Code size       7 (0x7)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  newobj     instance void [mscorlib]System.NotImplementedException::.ctor()
+    IL_0006:  throw
+  } // end of method CompoundAssignmentTest::GetArray
+
+  .method public hidebysig instance int32 
+          GetValue(int32 'value') cil managed
+  {
+    // Code size       7 (0x7)
+    .maxstack  1
+    .locals init (int32 V_0)
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  stloc.0
+    IL_0003:  br.s       IL_0005
+
+    IL_0005:  ldloc.0
+    IL_0006:  ret
+  } // end of method CompoundAssignmentTest::GetValue
+
+  .method public hidebysig instance int32 
+          ArrayUsageWithMethods() cil managed
+  {
+    // Code size       39 (0x27)
+    .maxstack  3
+    .locals init (int32 V_0,
+             int32 V_1)
+    IL_0000:  nop
+    IL_0001:  ldarg.0
+    IL_0002:  call       instance int32[] ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest::GetArray()
+    IL_0007:  ldarg.0
+    IL_0008:  call       instance int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest::GetIndex()
+    IL_000d:  ldelema    [mscorlib]System.Int32
+    IL_0012:  dup
+    IL_0013:  ldobj      [mscorlib]System.Int32
+    IL_0018:  dup
+    IL_0019:  stloc.1
+    IL_001a:  ldc.i4.1
+    IL_001b:  add
+    IL_001c:  stobj      [mscorlib]System.Int32
+    IL_0021:  ldloc.1
+    IL_0022:  stloc.0
+    IL_0023:  br.s       IL_0025
+
+    IL_0025:  ldloc.0
+    IL_0026:  ret
+  } // end of method CompoundAssignmentTest::ArrayUsageWithMethods
+
   .method public hidebysig instance void 
           NestedField() cil managed
   {
-    // Code size       41 (0x29)
+    // Code size       50 (0x32)
     .maxstack  3
-    .locals init (bool V_0)
+    .locals init (bool V_0,
+             int32 V_1)
     IL_0000:  nop
     IL_0001:  ldarg.0
     IL_0002:  ldflda     valuetype ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest/StructContainer ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest::field1
@@ -206,18 +479,23 @@
     IL_000d:  ceq
     IL_000f:  stloc.0
     IL_0010:  ldloc.0
-    IL_0011:  brtrue.s   IL_0028
+    IL_0011:  brtrue.s   IL_0031
 
     IL_0013:  nop
     IL_0014:  ldarg.0
     IL_0015:  ldflda     valuetype ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest/StructContainer ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest::field1
     IL_001a:  dup
     IL_001b:  ldfld      int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest/StructContainer::Field
-    IL_0020:  ldc.i4.1
-    IL_0021:  add
-    IL_0022:  stfld      int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest/StructContainer::Field
-    IL_0027:  nop
-    IL_0028:  ret
+    IL_0020:  dup
+    IL_0021:  stloc.1
+    IL_0022:  ldc.i4.1
+    IL_0023:  add
+    IL_0024:  stfld      int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.CompoundAssignmentTest/StructContainer::Field
+    IL_0029:  ldloc.1
+    IL_002a:  call       void [mscorlib]System.Console::WriteLine(int32)
+    IL_002f:  nop
+    IL_0030:  nop
+    IL_0031:  ret
   } // end of method CompoundAssignmentTest::NestedField
 
   .method public hidebysig specialname rtspecialname 

ICSharpCode.Decompiler/Tests/TestCases/Pretty/HelloWorld.il

@@ -1,13 +1,16 @@
+
 //  Microsoft (R) .NET Framework IL Disassembler.  Version 4.0.30319.17929
 //  Copyright (c) Microsoft Corporation.  All rights reserved.
 
+
+
 // Metadata version: v4.0.30319
 .assembly extern mscorlib
 {
   .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
   .ver 4:0:0:0
 }
-.assembly ndx1gr1f
+.assembly xxnyzhlv
 {
   .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilationRelaxationsAttribute::.ctor(int32) = ( 01 00 08 00 00 00 00 00 ) 
   .custom instance void [mscorlib]System.Runtime.CompilerServices.RuntimeCompatibilityAttribute::.ctor() = ( 01 00 01 00 54 02 16 57 72 61 70 4E 6F 6E 45 78   // ....T..WrapNonEx
@@ -17,15 +20,15 @@
   .hash algorithm 0x00008004
   .ver 0:0:0:0
 }
-.module ndx1gr1f.exe
-// MVID: {8005ACF2-3B7B-47F2-8D51-C16AB15E3999}
+.module xxnyzhlv.exe
+// MVID: {81192B72-DC9D-4496-83E9-F42A6852B7DB}
 .custom instance void [mscorlib]System.Security.UnverifiableCodeAttribute::.ctor() = ( 01 00 00 00 ) 
 .imagebase 0x00400000
 .file alignment 0x00000200
 .stackreserve 0x00100000
 .subsystem 0x0003       // WINDOWS_CUI
 .corflags 0x00000001    //  ILONLY
-// Image base: 0x01140000
+// Image base: 0x00BC0000
 
 
 // =============== CLASS MEMBERS DECLARATION ===================
@@ -55,4 +58,10 @@
     IL_0006:  ret
   } // end of method HelloWorld::.ctor
 
-} // end of class ICSharpCode.Decompiler.Tests.TestCases.Pretty.HelloWorld.HelloWorld
+} // end of class ICSharpCode.Decompiler.Tests.TestCases.Pretty.HelloWorld.HelloWorld
+
+
+// =============================================================
+
+// *********** DISASSEMBLY COMPLETE ***********************
+// WARNING: Created Win32 resource file ../../Tests/TestCases/Pretty\HelloWorld.res

ICSharpCode.Decompiler/Tests/TestCases/Pretty/InlineAssignmentTest.cs

@@ -85,5 +85,25 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 		{
 			return this.field3[i] = 1;
 		}
+		
+		public int GetIndex()
+		{
+			return new Random().Next(0, 100);
+		}
+		
+		public int[] GetArray()
+		{
+			throw new NotImplementedException();
+		}
+		
+		public int GetValue(int value)
+		{
+			return value;
+		}
+		
+		public int ArrayUsageWithMethods()
+		{
+			return this.GetArray()[this.GetIndex()] = this.GetValue(this.GetIndex());
+		}
 	}
 }

ICSharpCode.Decompiler/Tests/TestCases/Pretty/InlineAssignmentTest.il

@@ -10,7 +10,7 @@
   .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
   .ver 4:0:0:0
 }
-.assembly siuuofgg
+.assembly ddqu2emz
 {
   .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilationRelaxationsAttribute::.ctor(int32) = ( 01 00 08 00 00 00 00 00 ) 
   .custom instance void [mscorlib]System.Runtime.CompilerServices.RuntimeCompatibilityAttribute::.ctor() = ( 01 00 01 00 54 02 16 57 72 61 70 4E 6F 6E 45 78   // ....T..WrapNonEx
@@ -20,15 +20,15 @@
   .hash algorithm 0x00008004
   .ver 0:0:0:0
 }
-.module siuuofgg.exe
-// MVID: {7C4F4FA4-F91C-4C75-A521-2E31EFBCDAC8}
+.module ddqu2emz.exe
+// MVID: {E3C9CEDE-53B1-4B60-977E-6E7ECB67DB34}
 .custom instance void [mscorlib]System.Security.UnverifiableCodeAttribute::.ctor() = ( 01 00 00 00 ) 
 .imagebase 0x00400000
 .file alignment 0x00000200
 .stackreserve 0x00100000
 .subsystem 0x0003       // WINDOWS_CUI
 .corflags 0x00000001    //  ILONLY
-// Image base: 0x016A0000
+// Image base: 0x03080000
 
 
 // =============== CLASS MEMBERS DECLARATION ===================
@@ -222,6 +222,77 @@
     IL_0011:  ret
   } // end of method InlineAssignmentTest::Array2
 
+  .method public hidebysig instance int32 
+          GetIndex() cil managed
+  {
+    // Code size       19 (0x13)
+    .maxstack  3
+    .locals init (int32 V_0)
+    IL_0000:  nop
+    IL_0001:  newobj     instance void [mscorlib]System.Random::.ctor()
+    IL_0006:  ldc.i4.0
+    IL_0007:  ldc.i4.s   100
+    IL_0009:  callvirt   instance int32 [mscorlib]System.Random::Next(int32,
+                                                                      int32)
+    IL_000e:  stloc.0
+    IL_000f:  br.s       IL_0011
+
+    IL_0011:  ldloc.0
+    IL_0012:  ret
+  } // end of method InlineAssignmentTest::GetIndex
+
+  .method public hidebysig instance int32[] 
+          GetArray() cil managed
+  {
+    // Code size       7 (0x7)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  newobj     instance void [mscorlib]System.NotImplementedException::.ctor()
+    IL_0006:  throw
+  } // end of method InlineAssignmentTest::GetArray
+
+  .method public hidebysig instance int32 
+          GetValue(int32 'value') cil managed
+  {
+    // Code size       7 (0x7)
+    .maxstack  1
+    .locals init (int32 V_0)
+    IL_0000:  nop
+    IL_0001:  ldarg.1
+    IL_0002:  stloc.0
+    IL_0003:  br.s       IL_0005
+
+    IL_0005:  ldloc.0
+    IL_0006:  ret
+  } // end of method InlineAssignmentTest::GetValue
+
+  .method public hidebysig instance int32 
+          ArrayUsageWithMethods() cil managed
+  {
+    // Code size       34 (0x22)
+    .maxstack  4
+    .locals init (int32 V_0,
+             int32 V_1)
+    IL_0000:  nop
+    IL_0001:  ldarg.0
+    IL_0002:  call       instance int32[] ICSharpCode.Decompiler.Tests.TestCases.Pretty.InlineAssignmentTest::GetArray()
+    IL_0007:  ldarg.0
+    IL_0008:  call       instance int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.InlineAssignmentTest::GetIndex()
+    IL_000d:  ldarg.0
+    IL_000e:  ldarg.0
+    IL_000f:  call       instance int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.InlineAssignmentTest::GetIndex()
+    IL_0014:  call       instance int32 ICSharpCode.Decompiler.Tests.TestCases.Pretty.InlineAssignmentTest::GetValue(int32)
+    IL_0019:  dup
+    IL_001a:  stloc.1
+    IL_001b:  stelem.i4
+    IL_001c:  ldloc.1
+    IL_001d:  stloc.0
+    IL_001e:  br.s       IL_0020
+
+    IL_0020:  ldloc.0
+    IL_0021:  ret
+  } // end of method InlineAssignmentTest::ArrayUsageWithMethods
+
   .method public hidebysig specialname rtspecialname 
           instance void  .ctor() cil managed
   {