Reland ArrayPop / ArrayPush.

test/mjsunit/array-pop.js

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+// Flags: --allow-natives-syntax
+//
 // Check pops with various number of arguments.
 (function() {
   var a = [];
   for (var i = 0; i < 7; i++) {
     a = [7, 6, 5, 4, 3, 2, 1];
 
     assertEquals(1, a.pop(), "1st pop");
     assertEquals(6, a.length, "length 1st pop");
 
     assertEquals(2, a.pop(1), "2nd pop");
@@ skipping 76 matching lines @@
 // Test the case of not JSArray receiver.
 // Regression test for custom call generators, see issue 684.
 (function() {
   var a = [];
   for (var i = 0; i < 100; i++) a.push(i);
   var x = {__proto__: a};
   for (var i = 0; i < 100; i++) {
     assertEquals(99 - i, x.pop(), i + 'th iteration');
   }
 })();
+
+(function () {
+  function f(a, deopt) {
+    var v = a.pop() ? 1 : 2;
+    if (deopt) %DeoptimizeFunction(f);
+    return v;
+  }
+
+  var a = [true, true, true, true]
+  assertEquals(1, f(a, false));
+  assertEquals(1, f(a, false));
+  %OptimizeFunctionOnNextCall(f);
+  assertEquals(1, f(a, false));
+  assertEquals(1, f(a, true));
+})();