VM: Improve receiver class check in polymorphic inlining.

runtime/vm/assembler_ia32_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/os.h"
@@ skipping 3206 matching lines @@
   __ movl(ECX, Address(ESP, 4 * kWordSize));
   __ pushl(EAX);
   __ StoreIntoObject(ECX,
                      FieldAddress(ECX, GrowableObjectArray::data_offset()),
                      EAX);
   __ popl(EAX);
   __ popl(CTX);
   __ ret();
 }
 
+
+ASSEMBLER_TEST_GENERATE(BitTest, assembler) {
+  __ movl(EAX, Immediate(4));
+  __ movl(ECX, Immediate(2));
+  __ bt(EAX, ECX);
+  Label ok;
+  __ j(CARRY, &ok);
+  __ int3();
+  __ Bind(&ok);
+  __ movl(EAX, Immediate(1));
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(BitTest, test) {
+  typedef int (*BitTest)();
+  EXPECT_EQ(1, reinterpret_cast<BitTest>(test->entry())());
+}
+
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32