- Altered the InitializerPeepholeTransforms' ArrayInitializer forward-scan to only look at the next instruction: in practice, CSC does not seem to generate code that needs anything more, and there are some questions as to the validity of the looping itself (i.e. what if there is a branch between them?

- Added another test to the InitializerTests, to validate that it handles deeper multi-dimensional arrays (I went 3x3x3 for simplicity)

ICSharpCode.Decompiler/ILAst/InitializerPeepholeTransforms.cs

@@ -120,25 +120,23 @@ namespace ICSharpCode.Decompiler.ILAst
 
 		bool ForwardScanInitializeArrayRuntimeHelper(List<ILNode> body, int pos, ILVariable array, TypeReference arrayType, int arrayLength, out ILExpression[] values, out int foundPos)
 		{
-			for (; pos < body.Count; pos++) {
-				ILVariable v2;
-				MethodReference methodRef;
-				ILExpression methodArg1;
-				ILExpression methodArg2;
-				FieldDefinition field;
-				if (body.ElementAtOrDefault(pos).Match(ILCode.Call, out methodRef, out methodArg1, out methodArg2) &&
-					methodRef.DeclaringType.FullName == "System.Runtime.CompilerServices.RuntimeHelpers" &&
-					methodRef.Name == "InitializeArray" &&
-					methodArg1.Match(ILCode.Ldloc, out v2) &&
-					array == v2 &&
-					methodArg2.Match(ILCode.Ldtoken, out field) &&
-					field != null && field.InitialValue != null) {
-					ILExpression[] newArr = new ILExpression[arrayLength];
-					if (DecodeArrayInitializer(TypeAnalysis.GetTypeCode(arrayType.GetElementType()), field.InitialValue, newArr)) {
-						values = newArr;
-						foundPos = pos;
-						return true;
-					}
+			ILVariable v2;
+			MethodReference methodRef;
+			ILExpression methodArg1;
+			ILExpression methodArg2;
+			FieldDefinition field;
+			if (body.ElementAtOrDefault(pos).Match(ILCode.Call, out methodRef, out methodArg1, out methodArg2) &&
+				methodRef.DeclaringType.FullName == "System.Runtime.CompilerServices.RuntimeHelpers" &&
+				methodRef.Name == "InitializeArray" &&
+				methodArg1.Match(ILCode.Ldloc, out v2) &&
+				array == v2 &&
+				methodArg2.Match(ILCode.Ldtoken, out field) &&
+				field != null && field.InitialValue != null) {
+				ILExpression[] newArr = new ILExpression[arrayLength];
+				if (DecodeArrayInitializer(TypeAnalysis.GetTypeCode(arrayType.GetElementType()), field.InitialValue, newArr)) {
+					values = newArr;
+					foundPos = pos;
+					return true;
 				}
 			}
 			values = null;

ICSharpCode.Decompiler/Tests/InitializerTests.cs

@@ -709,4 +709,86 @@ public class InitializerTests
 	            }
 	    };
 	}
+
+	public void ArrayOfArrayOfArrayInit()
+	{
+		int[][,,] array = new int[][,,]
+		{
+			new int[, , ]
+			{
+				{
+					{
+						1,
+						2,
+						3
+					},
+					{ 
+						4,
+						5,
+						6
+					},
+					{
+						7,
+						8,
+						9
+					}
+				},
+				{
+					{
+						11,
+						12,
+						13
+					},
+					{
+						14,
+						15,
+						16
+					},
+					{
+						17,
+						18,
+						19
+					}
+				}
+			},
+
+			new int[, , ]
+			{
+				{
+					{
+						21,
+						22,
+						23
+					},
+					{
+						24,
+						25,
+						26
+					},
+					{
+						27,
+						28,
+						29
+					}
+				},
+				{
+					{
+						31,
+						32,
+						33
+					},
+					{
+						34,
+						35,
+						36
+					},
+					{
+						37,
+						38,
+						39
+					}
+				}
+			}
+	};
+	}
 }