Use a typed array for the irregexp stack.

runtime/vm/code_generator.h

 // 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.
 
 #ifndef VM_CODE_GENERATOR_H_
 #define VM_CODE_GENERATOR_H_
 
 #include "vm/globals.h"
 #include "vm/runtime_entry.h"
 
@@ skipping 31 matching lines @@
 DECLARE_RUNTIME_ENTRY(TraceICCall);
 DECLARE_RUNTIME_ENTRY(PatchStaticCall);
 DECLARE_RUNTIME_ENTRY(ReThrow);
 DECLARE_RUNTIME_ENTRY(StackOverflow);
 DECLARE_RUNTIME_ENTRY(Throw);
 DECLARE_RUNTIME_ENTRY(TraceFunctionEntry);
 DECLARE_RUNTIME_ENTRY(TraceFunctionExit);
 DECLARE_RUNTIME_ENTRY(DeoptimizeMaterialize);
 DECLARE_RUNTIME_ENTRY(UpdateFieldCid);
 DECLARE_RUNTIME_ENTRY(InitStaticField);
+DECLARE_RUNTIME_ENTRY(GrowRegExpStack);
 
 const char* DeoptReasonToCString(ICData::DeoptReasonId deopt_reason);
 
 void DeoptimizeAt(const Code& optimized_code, uword pc);
 void DeoptimizeAll();
 
 double DartModulo(double a, double b);
 void SinCos(double arg, double* sin_res, double* cos_res);
 
 }  // namespace dart
 
 #endif  // VM_CODE_GENERATOR_H_