Fix #2390: Extend variable splitting to treat stobj as immediate address use.

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

@@ -233,6 +233,9 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty.InitializerTests
 		}
 		#endregion
 
+		private S s1;
+		private S s2;
+
 		#region Field initializer tests
 		private static V3f[] Issue1336_rg0 = new V3f[3] {
 			new V3f(1f, 1f, 1f),
@@ -905,6 +908,18 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty.InitializerTests
 			});
 		}
 
+		public void InliningOfStFldTarget()
+		{
+			s1 = new S {
+				A = 24,
+				B = 42
+			};
+			s2 = new S {
+				A = 42,
+				B = 24
+			};
+		}
+
 		public static void NotAStructInitializer_ExplicitConstructor()
 		{
 			StructData structData = new StructData(0);

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

@@ -282,7 +282,7 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 			return ulong.MaxValue.ToString();
 		}
 
-		public static void M4()
+		public static void InliningDefaultValue()
 		{
 			Test(default(DateTime).GetType());
 			Test(default(DateTime).ToString());

ICSharpCode.Decompiler/IL/Transforms/SplitVariables.cs

@@ -103,7 +103,8 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 		{
 			switch (addressLoadingInstruction.Parent)
 			{
-				case LdObj ldobj:
+				case LdObj _:
+				case StObj stobj when stobj.Target == addressLoadingInstruction:
 					return AddressUse.Immediate;
 				case LdFlda ldflda:
 					return DetermineAddressUse(ldflda, targetVar);