Create a internal, global native context used only for generated code stubs

src/runtime.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This files contains runtime support implemented in JavaScript.
 
 // CAUTION: Some of the functions specified in this file are called
 // directly from compiled code. These are the functions with names in
 // ALL CAPS. The compiled code passes the first argument in 'this'.
 
@@ skipping 45 matching lines @@
 var CONCAT_ITERABLE_TO_ARRAY;
 var APPLY_PREPARE;
 var REFLECT_APPLY_PREPARE;
 var REFLECT_CONSTRUCT_PREPARE;
 var STACK_OVERFLOW;
 var TO_OBJECT;
 var TO_NUMBER;
 var TO_STRING;
 var TO_NAME;
 
-var StringLengthTFStub;
-var StringAddTFStub;
-var MathFloorStub;
-
 var $defaultNumber;
 var $defaultString;
 var $NaN;
 var $nonNumberToNumber;
 var $nonStringToString;
 var $sameValue;
 var $sameValueZero;
 var $toBoolean;
 var $toInt32;
 var $toInteger;
@@ skipping 664 matching lines @@
   return %$toString(this);
 }
 
 
 // Convert the receiver to a string or symbol - forward to ToName.
 TO_NAME = function TO_NAME() {
   return %$toName(this);
 }
 
 
-/* -----------------------------------------------
-   - - -   J a v a S c r i p t   S t u b s   - - -
-   -----------------------------------------------
-*/
-
-StringLengthTFStub = function StringLengthTFStub(call_conv, minor_key) {
-  var stub = function(receiver, name, i, v) {
-    // i and v are dummy parameters mandated by the InterfaceDescriptor,
-    // (LoadWithVectorDescriptor).
-    return %_StringGetLength(%_JSValueGetValue(receiver));
-  }
-  return stub;
-}
-
-StringAddTFStub = function StringAddTFStub(call_conv, minor_key) {
-  var stub = function(left, right) {
-    return %StringAdd(left, right);
-  }
-  return stub;
-}
-
-var kTurboFanICCallModeMask = 1;
-var kTurboFanICCallForUnptimizedCode = 0;
-var kTurboFanICCallForOptimizedCode = 1;
-
-MathFloorStub = function MathFloorStub(call_conv, minor_key) {
-  var call_from_optimized_ic = function(f, i, tv, receiver, v) {
-    "use strict";
-    // |f| is this function's JSFunction
-    // |i| is TypeFeedbackVector slot # of callee's CallIC for Math.floor call
-    // |receiver| is receiver, should not be used
-    // |tv| is the calling function's type vector
-    // |v| is the value to floor
-    if (f !== %_FixedArrayGet(tv, i|0)) {
-      return %_CallFunction(receiver, v, f);
-    }
-    var r = %_MathFloor(+v);
-    if (%_IsMinusZero(r)) {
-      // Collect type feedback when the result of the floor is -0. This is
-      // accomplished by storing a sentinel in the second, "extra"
-      // TypeFeedbackVector slot corresponding to the Math.floor CallIC call in
-      // the caller's TypeVector.
-      %_FixedArraySet(tv, ((i|0)+1)|0, 1);
-      return -0;
-    }
-    // Return integers in smi range as smis.
-    var trunc = r|0;
-    if (trunc === r) {
-      return trunc;
-    }
-    return r;
-  }
-  var call_mode = (minor_key & kTurboFanICCallModeMask);
-  if (call_mode == kTurboFanICCallForOptimizedCode) {
-    return call_from_optimized_ic;
-  } else {
-    %SetForceInlineFlag(call_from_optimized_ic);
-    var call_from_unoptimized_ic = function(f, i, receiver, v) {
-      var tv = %_GetTypeFeedbackVector(%_GetCallerJSFunction());
-      return call_from_optimized_ic(f, i, tv, receiver, v);
-    }
-    return call_from_unoptimized_ic;
-  }
-}
-
-
 /* -------------------------------------
    - - -   C o n v e r s i o n s   - - -
    -------------------------------------
 */
 
 // ECMA-262, section 9.1, page 30. Use null/undefined for no hint,
 // (1) for number hint, and (2) for string hint.
 function ToPrimitive(x, hint) {
   // Fast case check.
   if (IS_STRING(x)) return x;
@@ skipping 231 matching lines @@
 $toLength = ToLength;
 $toName = ToName;
 $toNumber = ToNumber;
 $toObject = ToObject;
 $toPositiveInteger = ToPositiveInteger;
 $toPrimitive = ToPrimitive;
 $toString = ToString;
 $toUint32 = ToUint32;
 
 })