Fast-codegen: Arguments object working on all platforms.

test/mjsunit/arguments-read-and-assignment.js

Index: test/mjsunit/arguments-read-and-assignment.js
diff --git a/test/mjsunit/arguments-read-and-assignment.js b/test/mjsunit/arguments-read-and-assignment.js
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+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// Testing basic functionality of the arguments object.
+// Introduced to ensure that the fast compiler does the right thing.
+// The arguments object itself.
+assertEquals(42, function(){ return arguments;}(42)[0],
+             "return arguments value");
+assertEquals(42, function(){ return arguments;}(42)[0],
+             "arguments in plain value context");
+assertEquals(42, function(){ arguments;return 42}(37),
+             "arguments in effect context");
+assertEquals(42, function(){ if(arguments)return 42;}(),
+             "arguments in a boolean context");
+assertEquals(42, function(){ return arguments || true;}(42)[0],
+             "arguments in a short-circuit boolean context - or");
+assertEquals(true, function(){ return arguments && [true];}(42)[0],
+             "arguments in a short-circuit boolean context - and");
+assertEquals(42, function(){ arguments = 42; return 42;}(),
+             "arguments assignment");
+// Properties of the arguments object.
+assertEquals(42, function(){ return arguments[0]; }(42),
+             "args[0] value returned");
+assertEquals(42, function(){ arguments[0]; return 42}(),
+             "args[0] value ignored");
+assertEquals(42, function(){ if (arguments[0]) return 42; }(37),
+             "args[0] to boolean");
+assertEquals(42, function(){ return arguments[0] || "no"; }(42),
+             "args[0] short-circuit boolean or true");
+assertEquals(42, function(){ return arguments[0] || 42; }(0),
+             "args[0] short-circuit boolean or false");
+assertEquals(37, function(){ return arguments[0] && 37; }(42),
+             "args[0] short-circuit boolean and true");
+assertEquals(0, function(){ return arguments[0] && 42; }(0),
+             "args[0] short-circuit boolean and false");
+assertEquals(42, function(){ arguments[0] = 42; return arguments[0]; }(37),
+             "args[0] assignment");
+// Link between arguments and parameters.
+assertEquals(42, function(a) { arguments[0] = 42; return a; }(37),
+             "assign args[0]->a");
+assertEquals(42, function(a) { a = 42; return arguments[0]; }(37),
+             "assign a->args[0]");
+assertEquals(54, function(a, b) { arguments[1] = 54; return b; }(42, 37),
+             "assign args[1]->b:b");
+assertEquals(54, function(a, b) { b = 54; return arguments[1]; }(42, 47),
+             "assign b->args[1]:b");
+assertEquals(42, function(a, b) { arguments[1] = 54; return a; }(42, 37),
+             "assign args[1]->b:a");
+assertEquals(42, function(a, b) { b = 54; return arguments[0]; }(42, 47),
+             "assign b->args[1]:a");
+
+// Capture parameters in nested contexts.
+assertEquals(33,
+             function(a,b) {
+                return a + arguments[0] +
+                       function(b){ return a + b + arguments[0]; }(b); }(7,6),
+             "captured parameters");
+assertEquals(42, function(a) {
+                   arguments[0] = 42;
+                   return function(b){ return a; }();
+             }(37),
+             "capture value returned");
+assertEquals(42,
+             function(a) {
+               arguments[0] = 26;
+               return function(b){ a; return 42; }();
+             }(37),
+             "capture value ignored");
+assertEquals(42,
+             function(a) {
+               arguments[0] = 26;
+               return function(b){ if (a) return 42; }();
+              }(37),
+             "capture to boolean");
+assertEquals(42,
+             function(a) {
+               arguments[0] = 42;
+               return function(b){ return a || "no"; }();
+             }(37),
+             "capture short-circuit boolean or true");
+assertEquals(0,
+             function(a) {
+               arguments[0] = 0;
+               return function(b){ return a && 42; }();
+             }(37),
+             "capture short-circuit boolean and false");
+// Deeply nested.
+assertEquals(42,
+             function(a,b) {
+               return arguments[2] +
+                      function(){
+                        return b +
+                               function() {
+                                 return a;
+                               }();
+                      }();
+             }(7,14,21),
+             "deep nested capture");
+
+// Assignment to captured parameters.
+assertEquals(42, function(a,b) {
+                   arguments[1] = 11;
+                   return a + function(){ a = b; return a; }() + a;
+                 }(20, 37), "captured assignment");
+
+// Inside non-function scopes.
+assertEquals(42,
+             function(a) {
+               arguments[0] = 20;
+               with ({ b : 22 }) { return a + b; }
+             }(37),
+             "a in with");
+assertEquals(42,
+             function(a) {
+               with ({ b : 22 }) { return arguments[0] + b; }
+             }(20),
+             "args in with");
+assertEquals(42,
+             function(a) {
+               arguments[0] = 20;
+               with ({ b : 22 }) {
+                 return function() { return a; }() + b; }
+             }(37),
+             "captured a in with");
+assertEquals(42,
+             function(a) {
+               arguments[0] = 12;
+               with ({ b : 22 }) {
+                 return function f() {
+                          try { throw 8 } catch(e) { return e + a };
+                         }() + b;
+               }
+             }(37),
+             "in a catch in a named function captured a in with ");
+// Escaping arguments.
+function weirdargs(a,b,c) { if (!a) return arguments;
+                            return [b[2],c]; }
+var args1 = weirdargs(false, null, 40);
+var res = weirdargs(true, args1, 15);
+assertEquals(40, res[0], "return old args element");
+assertEquals(15, res[1], "return own args element");