Fixed issue v8:1644 (bug in the chaining of fixup position)

test/cctest/test-assembler-ia32.cc

 // Copyright 2006-2008 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 376 matching lines @@
   Code::cast(code)->Print();
 #endif
 
   F7 f = FUNCTION_CAST<F7>(Code::cast(code)->entry());
   CHECK_EQ(kLess, f(1.1, 2.2));
   CHECK_EQ(kEqual, f(2.2, 2.2));
   CHECK_EQ(kGreater, f(3.3, 2.2));
   CHECK_EQ(kNaN, f(OS::nan_value(), 1.1));
 }
 
+
+TEST(AssemblerIa3210) {
+  // Test chaining of label usages within instructions (issue 1644).
+  InitializeVM();
+  v8::HandleScope scope;
+  Assembler assm(Isolate::Current(), NULL, 0);
+
+  Label target;
+  __ j(equal, &target);
+  __ j(not_equal, &target);
+  __ bind(&target);
+  __ nop();
+}
+
 #undef __