fix: function parameter reassigned update (#5482)

fix: reassigned

src/ast/variables/ParameterVariable.ts

@@ -161,13 +161,13 @@ export default class ParameterVariable extends LocalVariable {
 	}
 
 	deoptimizePath(path: ObjectPath): void {
-		if (this.deoptimizedFields.has(UnknownKey)) {
-			return;
-		}
 		if (path.length === 0) {
 			this.markReassigned();
 			return;
 		}
+		if (this.deoptimizedFields.has(UnknownKey)) {
+			return;
+		}
 		const key = path[0];
 		if (this.deoptimizedFields.has(key)) {
 			return;

test/function/samples/reassigned-parameter/main.js

@@ -1,7 +1,21 @@
 function f(a) {
-  assert.equal(a ? 'OK' : 'FAIL', 'OK');
-  a = false;
-  assert.equal(a ? 'FAIL' : 'OK', 'OK');
+	assert.equal(a ? 'OK' : 'FAIL', 'OK');
+	a = false;
+	assert.equal(a ? 'FAIL' : 'OK', 'OK');
 }
 
-f(true)
+f(true);
+
+function g(array) {
+	if (array === null) {
+		array = [];
+	}
+
+	if (array) {
+		return 'OK';
+	}
+	return array;
+}
+
+assert.equal(g(null), 'OK');
+