Port irregexp bytecode compiler and interpreter from V8 r24065.

runtime/vm/object.cc

 // 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.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 20729 matching lines @@
 void JSRegExp::set_pattern(const String& pattern) const {
   StorePointer(&raw_ptr()->pattern_, pattern.raw());
 }
 
 
 void JSRegExp::set_function(intptr_t cid, const Function& value) const {
   StorePointer(FunctionAddr(cid), value.raw());
 }
 
 
+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));
 }
 
 
 RawJSRegExp* JSRegExp::New(Heap::Space space) {
   JSRegExp& result = JSRegExp::Handle();
   {
     RawObject* raw = Object::Allocate(JSRegExp::kClassId,
                                       JSRegExp::InstanceSize(),
                                       space);
     NoSafepointScope no_safepoint;
     result ^= raw;
     result.set_type(kUnitialized);
     result.set_flags(0);
+    result.set_num_registers(-1);
   }
   return result.raw();
 }
 
 
 void* JSRegExp::GetDataStartAddress() const {
   intptr_t addr = reinterpret_cast<intptr_t>(raw_ptr());
   return reinterpret_cast<void*>(addr + sizeof(RawJSRegExp));
 }
 
@@ skipping 291 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart