Port and integrate the irregexp engine from V8

runtime/vm/parser.h

Index: runtime/vm/parser.h
diff --git a/runtime/vm/parser.h b/runtime/vm/parser.h
index 2edc19a8b0084dbb630a4c97f34c1a700977ec3d..35696502b2d4b99d667085daa75a734327c3dfd7 100644
--- a/runtime/vm/parser.h
+++ b/runtime/vm/parser.h
@@ -25,6 +25,7 @@ class ArgumentsDescriptor;
 class Isolate;
 class LocalScope;
 class LocalVariable;
+class RegExpCompileData;
 class SourceLabel;
 template <typename T> class GrowableArray;
 
@@ -42,6 +43,7 @@ class ParsedFunction : public ZoneAllocated {
       : function_(function),
         code_(Code::Handle(isolate, function.unoptimized_code())),
         node_sequence_(NULL),
+        regexp_compile_data_(NULL),
         instantiator_(NULL),
         default_parameter_values_(Array::ZoneHandle(isolate, Array::null())),
         saved_current_context_var_(NULL),
@@ -66,6 +68,11 @@ class ParsedFunction : public ZoneAllocated {
   SequenceNode* node_sequence() const { return node_sequence_; }
   void SetNodeSequence(SequenceNode* node_sequence);
 
+  RegExpCompileData* regexp_compile_data() const {
+    return regexp_compile_data_;
+  }
+  void SetRegExpCompileData(RegExpCompileData* regexp_compile_data);
+
   LocalVariable* instantiator() const { return instantiator_; }
   void set_instantiator(LocalVariable* instantiator) {
     // May be NULL.
@@ -140,6 +147,7 @@ class ParsedFunction : public ZoneAllocated {
   int num_stack_locals() const { return num_stack_locals_; }
 
   void AllocateVariables();
+  void AllocateIrregexpVariables(intptr_t num_stack_locals);
 
   void record_await() {
     have_seen_await_expr_ = true;
@@ -171,6 +179,7 @@ class ParsedFunction : public ZoneAllocated {
   const Function& function_;
   Code& code_;
   SequenceNode* node_sequence_;
+  RegExpCompileData* regexp_compile_data_;
   LocalVariable* instantiator_;
   Array& default_parameter_values_;
   LocalVariable* saved_current_context_var_;