Serialize long integers as unsigned 32-bit pieces.

pkg/analyzer/lib/src/summary/summarize_const_expr.dart

 // Copyright (c) 2016, 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.
 
 library serialization.summarize_const_expr;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/summary/format.dart';
 
@@ skipping 108 matching lines @@
   UnlinkedConstBuilder toBuilder() {
     return new UnlinkedConstBuilder(
         operations: operations,
         ints: ints,
         doubles: doubles,
         strings: strings,
         references: references);
   }
 
   void _pushInt(int value) {
-    // TODO(scheglov) add support for arbitrary precision ints
-    assert(value.abs() < (2 << 31));
-    ints.add(value & 0xFFFFFFFF);
-    operations.add(UnlinkedConstOperation.pushInt);
+    assert(value >= 0);
+    if (value >= (1 << 32)) {
+      _pushInt(value >> 32);
+      operations.add(UnlinkedConstOperation.shiftOr);
+      ints.add(value & 0xFFFFFFFF);
+    } else {
+      operations.add(UnlinkedConstOperation.pushInt);
+      ints.add(value);
+    }
   }
 
   void _serializeBinaryExpression(BinaryExpression expr) {
     serialize(expr.leftOperand);
     serialize(expr.rightOperand);
     TokenType operator = expr.operator.type;
     if (operator == TokenType.EQ_EQ) {
       operations.add(UnlinkedConstOperation.equal);
     } else if (operator == TokenType.BANG_EQ) {
       operations.add(UnlinkedConstOperation.equal);
@@ skipping 130 matching lines @@
  * Error that describes a problem during a constant expression serialization.
  */
 class _ConstExprSerializationError {
   final String message;
 
   _ConstExprSerializationError(this.message);
 
   @override
   String toString() => message;
 }