Enable remaining execution tests on x64.

runtime/vm/snapshot_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 "platform/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/snapshot.h"
 #include "vm/unit_test.h"
 
@@ skipping 280 matching lines @@
   String& actual_literal = String::Handle();
   for (intptr_t i = 0; i < expected_tokens.Length(); i++) {
     EXPECT_EQ(expected_tokens.KindAt(i), serialized_tokens.KindAt(i));
     expected_literal ^= expected_tokens.LiteralAt(i);
     actual_literal ^= serialized_tokens.LiteralAt(i);
     EXPECT(expected_literal.Equals(actual_literal));
   }
 }
 
 
-#if defined(TARGET_ARCH_IA32)  // only ia32 can run execution tests.
+// Only ia32 and x64 can run execution tests.
+#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
 UNIT_TEST_CASE(FullSnapshot) {
   const char* kScriptChars =
       "class Fields  {\n"
       "  Fields(int i, int j) : fld1 = i, fld2 = j {}\n"
       "  int fld1;\n"
       "  final int fld2;\n"
       "  static int fld3;\n"
       "  static final int fld4 = 10;\n"
       "}\n"
       "class FieldsTest {\n"
@@ skipping 204 matching lines @@
                                0,
                                NULL);
     EXPECT_VALID(result);
     Dart_ExitScope();
   }
   Dart_ShutdownIsolate();
   free(full_snapshot);
   free(script_snapshot);
 }
 
-#endif  // TARGET_ARCH_IA32.
+#endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart