test/cctest/test-type-info.cc

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#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