Rewrite AssignVariableNames algorithm to use variable usages instead …

…of the list of variables.
icsharpcode · Jul 27, 2024 · 2ca5b5a · 2ca5b5a
1 parent c67d086
commit 2ca5b5a
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Showing 7 changed files with 143 additions and 150 deletions.
diff --git a/ICSharpCode.Decompiler.Tests/TestCases/Pretty/Async.cs b/ICSharpCode.Decompiler.Tests/TestCases/Pretty/Async.cs
@@ -250,35 +250,35 @@ public async Task LoadsToCatch(int i)
 			{
 				throw null;
 			}
-			catch (Exception ex2) when (i == 0)
+			catch (Exception ex) when (i == 0)
 			{
 				Console.WriteLine("First!");
 				if (i == 1)
 				{
 					throw;
 				}
 				await Task.Yield();
-				Console.WriteLine(ex2.StackTrace);
+				Console.WriteLine(ex.StackTrace);
 			}
-			catch (Exception ex3) when (True())
+			catch (Exception ex2) when (True())
 			{
 				Console.WriteLine("Second!");
 				if (i == 1)
 				{
 					throw;
 				}
 				await Task.Yield();
-				Console.WriteLine(ex3.StackTrace);
+				Console.WriteLine(ex2.StackTrace);
 			}
-			catch (Exception ex)
+			catch (Exception ex3)
 			{
 				Console.WriteLine("Third!");
 				if (i == 1)
 				{
 					throw;
 				}
 				await Task.Yield();
-				Console.WriteLine(ex.StackTrace);
+				Console.WriteLine(ex3.StackTrace);
 			}
 			catch when (i == 0)
 			{

diff --git a/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs b/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs
@@ -353,19 +353,19 @@ public static Action StaticAnonymousMethodNoClosure()
 
 		public static void NameConflict()
 		{
-			// i is captured variable,
-			// j is parameter in anonymous method
+			// i is local in main method,
+			// j is captured variable,
+			// k is parameter in anonymous method
 			// l is local in anonymous method,
-			// k is local in main method
 			// Ensure that the decompiler doesn't introduce name conflicts
 			List<Action<int>> list = new List<Action<int>>();
-			for (int k = 0; k < 10; k++)
+			for (int i = 0; i < 10; i++)
 			{
-				int i;
-				for (i = 0; i < 10; i++)
+				int j;
+				for (j = 0; j < 10; j++)
 				{
-					list.Add(delegate (int j) {
-						for (int l = 0; l < i; l += j)
+					list.Add(delegate (int k) {
+						for (int l = 0; l < j; l += k)
 						{
 							Console.WriteLine();
 						}

diff --git a/ICSharpCode.Decompiler.Tests/TestCases/Pretty/LocalFunctions.cs b/ICSharpCode.Decompiler.Tests/TestCases/Pretty/LocalFunctions.cs
@@ -39,10 +39,10 @@ public int MixedLocalFunction<T2>() where T2 : ICloneable, IConvertible
 #pragma warning disable CS0219
 				T2 t2 = default(T2);
 				object z = this;
-				for (int j = 0; j < 10; j++)
+				for (int i = 0; i < 10; i++)
 				{
-					int i = 0;
-					i += NonStaticMethod6<object>(0);
+					int i2 = 0;
+					i2 += NonStaticMethod6<object>(0);
 #if CS90
 					[My]
 					[return: My]
@@ -56,7 +56,7 @@ int NonStaticMethod6<T3>(int unused)
 						return NonStaticMethod6_1<T1>() + NonStaticMethod6_1<T2>() + z.GetHashCode();
 						int NonStaticMethod6_1<T4>()
 						{
-							return i + l + NonStaticMethod6<T4>(0) + StaticMethod1<decimal>();
+							return i2 + l + NonStaticMethod6<T4>(0) + StaticMethod1<decimal>();
 						}
 					}
 				}
@@ -119,18 +119,18 @@ public int MixedLocalFunction2Delegate<T2>() where T2 : ICloneable, IConvertible
 			{
 				T2 t2 = default(T2);
 				object z = this;
-				for (int j = 0; j < 10; j++)
+				for (int i = 0; i < 10; i++)
 				{
-					int i = 0;
-					i += StaticInvokeAsFunc(NonStaticMethod6<object>);
+					int i2 = 0;
+					i2 += StaticInvokeAsFunc(NonStaticMethod6<object>);
 					int NonStaticMethod6<T3>()
 					{
 						t2 = default(T2);
 						int l = 0;
 						return StaticInvokeAsFunc(NonStaticMethod6_1<T1>) + StaticInvokeAsFunc(NonStaticMethod6_1<T2>) + z.GetHashCode();
 						int NonStaticMethod6_1<T4>()
 						{
-							return i + l + StaticInvokeAsFunc(NonStaticMethod6<T4>) + StaticInvokeAsFunc(StaticMethod1<decimal>);
+							return i2 + l + StaticInvokeAsFunc(NonStaticMethod6<T4>) + StaticInvokeAsFunc(StaticMethod1<decimal>);
 						}
 					}
 				}
@@ -743,12 +743,12 @@ int ZZZ_0_0()
 				int ZZZ_1()
 				{
 					t0 = 0;
-					int t = t0;
+					int t3 = t0;
 					return new Func<int>(ZZZ_1_0)();
 					int ZZZ_1_0()
 					{
 						t0 = 0;
-						t = 0;
+						t3 = 0;
 						return 0;
 					}
 				}
@@ -779,14 +779,14 @@ int ZZZ_0()
 				int ZZZ_1()
 				{
 					t0 = 0;
-					int t1 = t0;
+					int t3 = t0;
 #if !OPT
 					Func<int> func = delegate {
 #else
 					return ((Func<int>)delegate {
 #endif
 						t0 = 0;
-						t1 = 0;
+						t3 = 0;
 						return 0;
 #if !OPT
 					};
@@ -822,14 +822,14 @@ int ZZZ_0()
 				int ZZZ_1()
 				{
 					t0 = 0;
-					int t1 = t0;
+					int t3 = t0;
 #if !OPT
 					Func<int> func = delegate {
 #else
 					return ((Func<int>)delegate {
 #endif
 						t0 = 0;
-						t1 = 0;
+						t3 = 0;
 						return 0;
 #if !OPT
 					};

diff --git a/ICSharpCode.Decompiler.Tests/TestCases/Pretty/VariableNamingWithoutSymbols.cs b/ICSharpCode.Decompiler.Tests/TestCases/Pretty/VariableNamingWithoutSymbols.cs
@@ -77,5 +77,13 @@ private unsafe static void Test(byte[] memory)
 				Console.WriteLine(*memory2);
 			}
 		}
+
+		private static void ForLoopNamingConflict(int i)
+		{
+			for (int j = 0; j < i; j++)
+			{
+				Console.WriteLine(i + " of " + j);
+			}
+		}
 	}
 }
diff --git a/...pCode.Decompiler.Tests/TestCases/Ugly/AggressiveScalarReplacementOfAggregates.Expected.cs b/...pCode.Decompiler.Tests/TestCases/Ugly/AggressiveScalarReplacementOfAggregates.Expected.cs
@@ -96,25 +96,25 @@ public void Issue1898(int i)
 				thisField = this,
 				field1 = i
 			};
-			int field1 = default(int);
-			string field2 = default(string);
+			int field5 = default(int);
+			string field4 = default(string);
 			DisplayClass field3 = default(DisplayClass);
 			while (true)
 			{
 				switch (Rand())
 				{
 					case 1:
-						field1 = Rand();
+						field5 = Rand();
 						continue;
 					case 2:
-						field2 = Rand().ToString();
+						field4 = Rand().ToString();
 						continue;
 					case 3:
 						field3 = displayClass;
 						continue;
 				}
-				Console.WriteLine(field1);
-				Console.WriteLine(field2);
+				Console.WriteLine(field5);
+				Console.WriteLine(field4);
 				Console.WriteLine(field3);
 			}
 		}