--- /dev/null
+// Copyright 2010 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
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+#include "cctest.h"
+#include "type-info.h"
+
+namespace v8 {
+namespace internal {
+
+TEST(ThreeBitRepresentation) {
+ // Numeric types and unknown should fit into the short
+ // representation.
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::Unknown().ThreeBitRepresentation()).IsUnknown());
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::Number().ThreeBitRepresentation()).IsNumber());
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::Integer32().ThreeBitRepresentation()).IsInteger32());
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::Smi().ThreeBitRepresentation()).IsSmi());
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::Double().ThreeBitRepresentation()).IsDouble());
+
+ // Other types should map to unknown.
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::Primitive().ThreeBitRepresentation()).IsUnknown());
+ CHECK(TypeInfo::ExpandedRepresentation(
+ TypeInfo::String().ThreeBitRepresentation()).IsUnknown());
+}
+
+} } // namespace v8::internal