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, 767561362)          \
   V(_GrowableObjectArray, get:_capacity, GrowableArrayCapacity, 874559046)     \
   V(_GrowableObjectArray, _setData, GrowableArraySetData, 1302055339)          \
   V(_GrowableObjectArray, _setLength, GrowableArraySetLength, 1016226171)      \
   V(_StringBase, get:length, StringBaseLength, 1158042795)                     \
   V(_StringBase, get:isEmpty, StringBaseIsEmpty, 1588094430)                   \
   V(_StringBase, codeUnitAt, StringBaseCodeUnitAt, 1452213966)                 \
   V(_StringBase, [], StringBaseCharAt, 924930519)                              \
   V(_OneByteString, _setAt, OneByteStringSetAt, 456985263)                     \
   V(_IntegerImplementation, toDouble, IntegerToDouble, 2141284842)             \
+  V(_IntegerImplementation, _leftShiftWithMask32, IntegerLeftShiftWithMask32,  \
+      964472615)                                                               \
   V(_Double, toInt, DoubleToInteger, 1580473283)                               \
   V(_Double, truncateToDouble, DoubleTruncate, 849350203)                      \
   V(_Double, roundToDouble, DoubleRound, 500368418)                            \
   V(_Double, floorToDouble, DoubleFloor, 763548522)                            \
   V(_Double, ceilToDouble, DoubleCeil, 976697019)                              \
   V(_Double, pow, DoublePow, 1240251670)                                       \
   V(_Double, _modulo, DoubleMod, 1850917533)                                   \
   V(::, sqrt, MathSqrt, 465520247)                                             \
   V(::, sin, MathSin, 730107143)                                               \
   V(::, cos, MathCos, 1282146521)                                              \
@@ skipping 6534 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_