Fix --singlemethodname (#78207)

MichalStrehovsky · web-flow · commit b6deba572141 · 2022-11-14T08:44:30.000+09:00
Single method compilation mode broke with the change to use System.CommandLine. "Not specified" no longer means `null`.
diff --git a/src/coreclr/tools/aot/ILCompiler/Program.cs b/src/coreclr/tools/aot/ILCompiler/Program.cs
@@ -615,8 +615,7 @@ private MethodDesc CheckAndParseSingleMethodModeArguments(CompilerTypeSystemCont
             if (method == null)
                 throw new CommandLineException($"Method '{singleMethodName}' not found in '{singleMethodTypeName}'");
 
-            if (method.HasInstantiation != (singleMethodGenericArgs != null) ||
-                (method.HasInstantiation && (method.Instantiation.Length != singleMethodGenericArgs.Length)))
+            if (method.Instantiation.Length != singleMethodGenericArgs.Length)
             {
                 throw new CommandLineException(
                     $"Expected {method.Instantiation.Length} generic arguments for method '{singleMethodName}' on type '{singleMethodTypeName}'");

Original file line number	Diff line number	Diff line change
`@@ -615,8 +615,7 @@ private MethodDesc CheckAndParseSingleMethodModeArguments(CompilerTypeSystemCont`
`615`	`615`	`if (method == null)`
`616`	`616`	`throw new CommandLineException($"Method '{singleMethodName}' not found in '{singleMethodTypeName}'");`
`617`	`617`
`618`		`- if (method.HasInstantiation != (singleMethodGenericArgs != null) \|\|`
`619`		`- (method.HasInstantiation && (method.Instantiation.Length != singleMethodGenericArgs.Length)))`
	`618`	`+ if (method.Instantiation.Length != singleMethodGenericArgs.Length)`
`620`	`619`	`{`
`621`	`620`	`throw new CommandLineException(`
`622`	`621`	`$"Expected {method.Instantiation.Length} generic arguments for method '{singleMethodName}' on type '{singleMethodTypeName}'");`