[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/mjsunit/compiler/loops.js

 // 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
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Test compilation of loops.
 
 var n = 1;
 for (var i = 1; (6 - i); i++) {
   // Factorial!
   n = n * i;
 }
 assertEquals(120, n);
+
+// Test assignments in the loop condition.
+function f(i, n) {
+  while((n = n - 1) >= 0) {
+    i = n + 1;
+  }
+  return i;
+}
+assertEquals(1, f(0, 42));
+
+
+// Test do-while loop and continue.
+function g(a) {
+  var x = 0, c = 0;
+  do {
+    x = x + 1;
+    if (x < 5) continue;
+    c = c + 1;
+  } while(x < a);
+  return c;
+}
+
+assertEquals(6, g(10));
+
+// Test deoptimization in the loop condition.
+assertEquals(0, g("foo"));