Initial steps towards cleaning up integer arithmetic IR.

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 16728 matching lines @@
   const uint64_t digit1 = DigitAt(1);
   const uint64_t value = (digit1 << 32) + DigitAt(0);
   uint64_t limit = Mint::kMaxValue;
   if (Neg()) {
     limit++;
   }
   return value <= limit;
 }
 
 
-int64_t Bigint::AsInt64Value() const {
-  ASSERT(FitsIntoInt64());
+int64_t Bigint::AsTruncatedInt64Value() const {
   const intptr_t used = Used();
   if (used == 0) return 0;
   const int64_t digit1 = (used > 1) ? DigitAt(1) : 0;
   const int64_t value = (digit1 << 32) + DigitAt(0);
   return Neg() ? -value : value;
 }
 
 
+int64_t Bigint::AsInt64Value() const {
+  ASSERT(FitsIntoInt64());
+  return AsTruncatedInt64Value();
+}
+
+
 bool Bigint::FitsIntoUint64() const {
   ASSERT(Bigint::kBitsPerDigit == 32);
   return !Neg() && (Used() <= 2);
 }
 
 
 uint64_t Bigint::AsUint64Value() const {
   ASSERT(FitsIntoUint64());
   const intptr_t used = Used();
   if (used == 0) return 0;
@@ skipping 3593 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart