[torque] Remove unnecessary arguments length checks

arguments[i] already returns undefined if arguments is not large
enough.

BUG=v8:10468

Change-Id: I0755014d0f1b61d5e3e2069ef4d14a9b51f2ebee
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170092Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67467}

src/builtins/array-every.tq

@@ -128,7 +128,7 @@ namespace array {
       const callbackfn = Cast<Callable>(arguments[0]) otherwise TypeError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
 
       // Special cases.
       try {

src/builtins/array-filter.tq

@@ -164,7 +164,7 @@ namespace array {
       const callbackfn = Cast<Callable>(arguments[0]) otherwise TypeError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
       let output: JSReceiver;
 
       // Special cases.

src/builtins/array-find.tq

@@ -136,7 +136,7 @@ namespace array {
           Cast<Callable>(arguments[0]) otherwise NotCallableError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
 
       // Special cases.
       try {

src/builtins/array-findindex.tq

@@ -137,7 +137,7 @@ namespace array {
           Cast<Callable>(arguments[0]) otherwise NotCallableError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
 
       // Special cases.
       try {

src/builtins/array-foreach.tq

@@ -109,7 +109,7 @@ namespace array {
       const callbackfn = Cast<Callable>(arguments[0]) otherwise TypeError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
 
       // Special cases.
       let k: Number = 0;

src/builtins/array-map.tq

@@ -241,7 +241,7 @@ namespace array {
       const callbackfn = Cast<Callable>(arguments[0]) otherwise TypeError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
 
       let array: JSReceiver;
       let k: Number = 0;

src/builtins/array-some.tq

@@ -128,7 +128,7 @@ namespace array {
       const callbackfn = Cast<Callable>(arguments[0]) otherwise TypeError;
 
       // 4. If thisArg is present, let T be thisArg; else let T be undefined.
-      const thisArg: JSAny = arguments.length > 1 ? arguments[1] : Undefined;
+      const thisArg: JSAny = arguments[1];
 
       // Special cases.
       try {

src/builtins/reflect.tq

@@ -61,14 +61,14 @@ namespace reflect {
   // ES6 section 26.1.6 Reflect.get
   transitioning javascript builtin
   ReflectGet(js-implicit context: NativeContext)(...arguments): JSAny {
-    const length = arguments.length;
-    const object: JSAny = length > 0 ? arguments[0] : Undefined;
+    const object: JSAny = arguments[0];
     const objectJSReceiver = Cast<JSReceiver>(object)
         otherwise ThrowTypeError(
         MessageTemplate::kCalledOnNonObject, 'Reflect.get');
-    const propertyKey: JSAny = length > 1 ? arguments[1] : Undefined;
+    const propertyKey: JSAny = arguments[1];
     const name: AnyName = ToName(propertyKey);
-    const receiver: JSAny = length > 2 ? arguments[2] : objectJSReceiver;
+    const receiver: JSAny =
+        arguments.length > 2 ? arguments[2] : objectJSReceiver;
     return GetPropertyWithReceiver(
         objectJSReceiver, name, receiver, SmiConstant(kReturnUndefined));
   }

src/builtins/typed-array-sort.tq

@@ -91,7 +91,7 @@ namespace typed_array {
       receiver: JSAny)(...arguments): JSTypedArray {
     // 1. If comparefn is not undefined and IsCallable(comparefn) is false,
     //    throw a TypeError exception.
-    const comparefnObj: JSAny = arguments.length > 0 ? arguments[0] : Undefined;
+    const comparefnObj: JSAny = arguments[0];
     if (comparefnObj != Undefined && !Is<Callable>(comparefnObj)) {
       ThrowTypeError(MessageTemplate::kBadSortComparisonFunction, comparefnObj);
     }

src/objects/js-aggregate-error.tq

@@ -30,12 +30,12 @@ namespace error {
     //   b. Let msgDesc be the PropertyDescriptor { [[Value]]: _msg_,
     //   [[Writable]]: *true*, [[Enumerable]]: *false*, [[Configurable]]: *true*
     //   c. Perform ! DefinePropertyOrThrow(_O_, *"message"*, _msgDesc_).
-    const message: JSAny = arguments.length > 0 ? arguments[1] : Undefined;
+    const message: JSAny = arguments[1];
     const obj: JSAggregateError =
         ConstructAggregateErrorHelper(context, target, newTarget, message);
 
     // 4. Let errorsList be ? IterableToList(errors).
-    const errors: JSAny = arguments.length > 0 ? arguments[0] : Undefined;
+    const errors: JSAny = arguments[0];
     const errorsArray =
         iterator::IterableToFixedArrayWithSymbolLookupSlow(errors);
     MakeFixedArrayCOW(errorsArray);