Fraction class prototype and test (not to be committed).

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, 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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/bootstrap.h"
 #include "vm/compiler.h"
 #include "vm/constant_propagator.h"
@@ skipping 2386 matching lines @@
     return defn;
   }
   return this;
 }
 
 
 static bool MayBeBoxableNumber(intptr_t cid) {
   return (cid == kDynamicCid) ||
          (cid == kMintCid) ||
          (cid == kBigintCid) ||
-         (cid == kDoubleCid);
+         (cid == kDoubleCid) ||
+         (cid == kFractionCid);
 }
 
 
 static bool MaybeNumber(CompileType* type) {
   ASSERT(Type::Handle(Type::Number()).IsMoreSpecificThan(
              Type::Handle(Type::Number()), NULL, NULL, Heap::kOld));
   return type->ToAbstractType()->IsDynamicType()
       || type->ToAbstractType()->IsObjectType()
       || type->ToAbstractType()->IsTypeParameter()
       || type->IsMoreSpecificThan(Type::Handle(Type::Number()));
 }
 
 
 // Returns a replacement for a strict comparison and signals if the result has
 // to be negated.
 static Definition* CanonicalizeStrictCompare(StrictCompareInstr* compare,
                                              bool* negated) {
   // Use propagated cid and type information to eliminate number checks.
-  // If one of the inputs is not a boxable number (Mint, Double, Bigint), or
-  // is not a subtype of num, no need for number checks.
+  // If one of the inputs is not a boxable number (Mint, Double, Bigint,
+  // Fraction), or  is not a subtype of num, no need for number checks.
   if (compare->needs_number_check()) {
     if (!MayBeBoxableNumber(compare->left()->Type()->ToCid()) ||
         !MayBeBoxableNumber(compare->right()->Type()->ToCid()))  {
       compare->set_needs_number_check(false);
     } else if (!MaybeNumber(compare->left()->Type()) ||
                !MaybeNumber(compare->right()->Type())) {
       compare->set_needs_number_check(false);
     }
   }
 
@@ skipping 1481 matching lines @@
   set_native_c_function(native_function);
   function().SetIsNativeAutoSetupScope(auto_setup_scope);
   Dart_NativeEntryResolver resolver = library.native_entry_resolver();
   bool is_bootstrap_native = Bootstrap::IsBootstapResolver(resolver);
   set_is_bootstrap_native(is_bootstrap_native);
 }
 
 #undef __
 
 }  // namespace dart