Port irregexp bytecode compiler and interpreter from V8 r24065.

runtime/vm/object.cc

Index: runtime/vm/object.cc
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index 1249a5ea2d4d2d5ae71b0d883a220070c1a783bc..b21af1d6157d9c25c24410547412baf28f59bd80 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -20747,6 +20747,15 @@ void JSRegExp::set_function(intptr_t cid, const Function& value) const {
 }
 
 
+void JSRegExp::set_bytecode(bool is_one_byte, const TypedData& bytecode) const {
+  if (is_one_byte) {
+    StorePointer(&raw_ptr()->one_byte_bytecode_, bytecode.raw());
+  } else {
+    StorePointer(&raw_ptr()->two_byte_bytecode_, bytecode.raw());
+  }

[srdjan, 2015/07/07 19:30:25]

If you set one, do you want to make sure that the other is cleared (null-ed) or
can both xxx_byte_bytecodes_ be set at the same time?

[rmacnak, 2015/07/07 21:42:53]

They can both be set if one tries to match the regex against both a
OneByteString and a TwoByteString.

+}
+
+
 void JSRegExp::set_num_bracket_expressions(intptr_t value) const {
   StoreSmi(&raw_ptr()->num_bracket_expressions_, Smi::New(value));
 }
@@ -20762,6 +20771,7 @@ RawJSRegExp* JSRegExp::New(Heap::Space space) {
     result ^= raw;
     result.set_type(kUnitialized);
     result.set_flags(0);
+    result.set_num_registers(-1);
   }
   return result.raw();
 }