Fix for running with --throw_on_javascript_int_overflow: recognize pattern (a << b) & mask and test…

runtime/vm/intermediate_language.h

 // 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 54 matching lines @@
   V(_GrowableObjectArray, get:length, GrowableArrayLength, 725548050)          \
   V(_GrowableObjectArray, get:_capacity, GrowableArrayCapacity, 725548050)     \
   V(_GrowableObjectArray, _setData, GrowableArraySetData, 588108129)           \
   V(_GrowableObjectArray, _setLength, GrowableArraySetLength, 279007375)       \
   V(_StringBase, get:length, StringBaseLength, 320803993)                      \
   V(_StringBase, get:isEmpty, StringBaseIsEmpty, 110631520)                    \
   V(_StringBase, codeUnitAt, StringBaseCodeUnitAt, 1574843871)                 \
   V(_StringBase, [], StringBaseCharAt, 2105190389)                             \
   V(_OneByteString, _setAt, OneByteStringSetAt, 1038132016)                    \
   V(_IntegerImplementation, toDouble, IntegerToDouble, 1331752138)             \
+  V(_IntegerImplementation, _leftShiftWithMask32, IntegerLeftShiftWithMask32,  \
+      1277584286)                                                              \
   V(_Double, toInt, DoubleToInteger, 630286253)                                \
   V(_Double, truncateToDouble, DoubleTruncate, 1804056693)                     \
   V(_Double, roundToDouble, DoubleRound, 1804056693)                           \
   V(_Double, floorToDouble, DoubleFloor, 1804056693)                           \
   V(_Double, ceilToDouble, DoubleCeil, 1804056693)                             \
   V(_Double, pow, DoublePow, 102305574)                                        \
   V(_Double, _modulo, DoubleMod, 663439671)                                    \
   V(::, sqrt, MathSqrt, 1662640002)                                            \
   V(::, sin, MathSin, 1273932041)                                              \
   V(::, cos, MathCos, 1749547468)                                              \
@@ skipping 6534 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_