CallIC used an invalid mechanism to detect if it was in optimized code.

test/mjsunit/regress/regress-453481.js

Index: test/mjsunit/regress/regress-453481.js
diff --git a/test/mjsunit/regress/regress-453481.js b/test/mjsunit/regress/regress-453481.js
new file mode 100644
index 0000000000000000000000000000000000000000..2bc9e464335f3c458300d5766f34d93cf471fe78
--- /dev/null
+++ b/test/mjsunit/regress/regress-453481.js
@@ -0,0 +1,127 @@
+// Copyright 2015 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.
+//
+// Flags: --always-opt
+
+var __v_0 = "";
+var __v_1 = {};
+var __v_2 = {};
+var __v_3 = {};
+var __v_4 = {};
+var __v_5 = {};
+var __v_6 = {};
+var __v_7 = {};
+var __v_8 = {};
+var __v_10 = {};
+var __v_13 = {};
+var __v_15 = {};
+var __v_16 = /abc/;
+var __v_17 = {};
+var __v_18 = function() {};
+var __v_19 = this;
+var __v_20 = {};
+var __v_21 = this;
+
+function __f_5(s) {
+  return __f_11(__f_3(__f_7(s), s.length * 8));
+}
+function __f_3(x, len) {
+  var __v_3 =  1732584193;
+  var __v_6 = -271733879;
+  var __v_5 = -1732584194;
+  var __v_7 =  271733892;
+
+  for (var i = 0; i < 1; i++) {
+    var __v_11 = __v_3;
+    var __v_14 = __v_6;
+    var __v_13 = __v_5;
+    var __v_15 = __v_7;
+
+    __v_3 = __f_10(__v_3, __v_6, __v_5, __v_7, x[__v_8+ 0], 6 , -198630844);
+    __v_7 = __f_10(__v_7, __v_3, __v_6, __v_5, x[__v_8+ 7], 10,  1126891415);
+    __v_5 = __f_10(__v_5, __v_7, __v_3, __v_6, x[__v_8+14], 15, -1416354905);
+    __v_6 = __f_10(__v_6, __v_5, __v_7, __v_3, x[__v_8+ 5], 21, -57434055);
+    __v_3 = __f_10(__v_3, __v_6, __v_5, __v_7, x[__v_8+12], 6 ,  1700485571);
+    __v_7 = __f_10(__v_7, __v_3, __v_6, __v_5, x[__v_8+ 3], 10, -1894986606);
+    __v_5 = __f_10(__v_5, __v_7, __v_3, __v_6, x[__v_8+10], 15, -1051523);
+    __v_6 = __f_10(__v_6, __v_5, __v_7, __v_3, x[__v_8+ 1], 21, -2054922799);
+    __v_3 = __f_10(__v_3, __v_6, __v_5, __v_7, x[__v_8+ 8], 6 ,  1873313359);
+    __v_7 = __f_10(__v_7, __v_3, __v_6, __v_5, x[__v_8+15], 10, -30611744);
+    __v_5 = __f_10(__v_5, __v_7, __v_3, __v_6, x[__v_8+ 22], 14, -1560198371);
+    __v_3 = __f_10(__v_3, __v_6, __v_5, __v_7, x[__v_8+ 4], 6 , -145523070);
+    __v_7 = __f_10(__v_7, __v_3, __v_6, __v_5, x[__v_8+11], 10, -1120210379);
+    __v_5 = __f_10(__v_5, __v_7, __v_3, __v_6, x[__v_8+ 2], 15,  718787259);
+    __v_6 = __f_10(__v_13, __v_5, __v_7, __v_3, x[__v_8+ 9], 21, -343485551);
+    __v_3 = __f_6(__v_3, __v_11);
+    __v_6 = __f_6(__v_6, __v_14);
+    __v_5 = __f_6(__v_5, __v_13);
+    __v_7 = __f_6(__v_7, __v_15);
+
+  }
+
+  return Array(__v_3, __v_13, __v_4, __v_19);
+}
+function __f_4(q, __v_3, __v_6, x, s, t) {
+  return __f_6(__f_12(__f_6(__f_6(__v_3, q), __f_6(x, t)), s),__v_6);
+}
+function __f_13(__v_3, __v_6, __v_5, __v_7, x, s, t) {
+  return __f_4((__v_6 & __v_5) | ((~__v_6) & __v_7), __v_3, __v_6, x, s, t);
+}
+function __f_8(__v_3, __v_6, __v_5, __v_7, x, s, t) {
+  return __f_4((__v_6 & __v_7) | (__v_5 & (~__v_7)), __v_3, __v_6, x, s, t);
+}
+function __f_9(__v_3, __v_6, __v_5, __v_7, x, s, t) {
+  return __f_4(__v_6 ^ __v_5 ^ __v_7, __v_3, __v_6, x, s, t);
+}
+function __f_10(__v_3, __v_6, __v_5, __v_7, x, s, t) {
+  return __f_4(__v_5 ^ (__v_6 | (~__v_7)), __v_3, __v_6, x, s, t);
+}
+function __f_6(x, y) {
+  var __v_12 = (x & 0xFFFF) + (y & 0xFFFF);
+  var __v_18 = (x >> 16) + (y >> 16) + (__v_12 >> 16);
+  return (__v_18 << 16) | (__v_12 & 0xFFFF);
+}
+function __f_12(num, cnt) {
+  return (num << cnt) | (num >>> (32 - cnt));
+}
+function __f_7(__v_16) {
+  var __v_4 = Array();
+  var __v_9 = (1 << 8) - 1;
+  for(var __v_8 = 0; __v_8 < __v_16.length * 8; __v_8 += 8)
+    __v_4[__v_8>>5] |= (__v_16.charCodeAt(__v_8 / 8) & __v_9) << (__v_8%32);
+  return __v_4;
+}
+
+function __f_11(binarray) { return __v_16; }
+
+try {
+__v_10 = "Rebellious subjects, enemies to peace,\n\
+Profaners of this neighbour-stained steel,--\n\
+Will they not hear? What, ho! you men, you beasts,\n\
+That quench the fire of your pernicious rage\n\
+With purple fountains issuing from your veins,\n\
+On pain of torture, from those bloody hands\n\
+Throw your mistemper'__v_7 weapons to the ground,\n\
+And hear the sentence of your moved prince.\n\
+Three civil brawls, bred of an airy word,\n\
+By thee, old Capulet, and Montague,\n\
+Have thrice disturb'__v_7 the quiet of our streets,\n\
+And made Verona's ancient citizens\n\
+Cast by their grave beseeming ornaments,\n\
+To wield old partisans, in hands as old,\n\
+Canker'__v_7 with peace, to part your canker'__v_7 hate:\n\
+If ever you disturb our streets again,\n\
+Your lives shall pay the forfeit of the peace.\n\
+For this time, all the rest depart away:\n\
+You Capulet; shall go along with me:\n\
+And, Montague, come you this afternoon,\n\
+To know our further pleasure in this case,\n\
+To old Free-town, our common judgment-place.\n\
+Once more, on pain of death, all men depart.\n"
+  function assertEquals(a, b) { }
+for (var __v_8 = 0; __v_8 < 11; ++__v_8) {
+  assertEquals(__f_5(__v_10), "1b8719c72d5d8bfd06e096ef6c6288c5");
+}
+
+} catch(e) { print("Caught: " + e); }