IR: fix compiler warnings

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrFunctionFactory.kt

@@ -293,7 +293,7 @@ class IrFunctionFactory(private val irBuiltIns: IrBuiltIns, private val symbolTa
         }
     }
 
-    private fun IrClass.createMembers(isK: Boolean, isSuspend: Boolean, arity: Int, name: String, descriptorFactory: FunctionDescriptorFactory) {
+    private fun IrClass.createMembers(isK: Boolean, isSuspend: Boolean, descriptorFactory: FunctionDescriptorFactory) {
         if (!isK) {
             val invokeSymbol = descriptorFactory.memberDescriptor("invoke") {
                 val returnType = with(IrSimpleTypeBuilder()) {
@@ -461,7 +461,7 @@ class IrFunctionFactory(private val irBuiltIns: IrBuiltIns, private val symbolTa
         klass.parent = packageFragment
         packageFragment.declarations += klass
 
-        klass.createMembers(isK, isSuspend, n, klass.name.identifier, descriptorFactory)
+        klass.createMembers(isK, isSuspend, descriptorFactory)
 
         return klass
     }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DumpIrTree.kt

@@ -216,7 +216,7 @@ class DumpIrTreeVisitor(
     }
 
     private fun IrMemberAccessExpression<*>.getTypeParameterNames(expectedCount: Int): List<String> =
-        if (this is IrDeclarationReference && symbol.isBound)
+        if (symbol.isBound)
             symbol.owner.getTypeParameterNames(expectedCount)
         else
             getPlaceholderParameterNames(expectedCount)

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt

@@ -206,7 +206,9 @@ class SymbolTable(
                 }
             } else {
                 if (d.isBound()) {
-                    ((d.owner as? IrSymbolDeclaration<*>)?.symbol ?: descriptorToSymbol[d]) as S?
+                    val result = (d.owner as? IrSymbolDeclaration<*>)?.symbol ?: descriptorToSymbol[d]
+                    @Suppress("UNCHECKED_CAST")
+                    result as S?
                 } else {
                     descriptorToSymbol[d]
                 }