Implement loop for global regexps in regexp assembler.

src/regexp-macro-assembler-tracer.cc

-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 84 matching lines @@
 }
 
 
 void RegExpMacroAssemblerTracer::PushBacktrack(Label* label) {
   PrintF(" PushBacktrack(label[%08x]);\n", LabelToInt(label));
   assembler_->PushBacktrack(label);
 }
 
 
 void RegExpMacroAssemblerTracer::Succeed() {
-  PrintF(" Succeed();\n");
+  PrintF(" Succeed();%s\n",
+         assembler_->global() ? " [restart for global match]" : "");

[Erik Corry, 2012/05/22 08:32:46]

It's a bit ugly that this will print "restart..." for global regexps in the
interpreter, but it won't actually restart.  Instead you could make this
function return a bool that tells you whether it actually emitted code to
restart.

   assembler_->Succeed();
 }
 
 
 void RegExpMacroAssemblerTracer::Fail() {
-  PrintF(" Fail();\n");
+  PrintF(" Fail();%s\n",
+         assembler_->global() ? " [return success count]" : "");
   assembler_->Fail();
 }
 
 
 void RegExpMacroAssemblerTracer::PopRegister(int register_index) {
   PrintF(" PopRegister(register=%d);\n", register_index);
   assembler_->PopRegister(register_index);
 }
 
 
@@ skipping 326 matching lines @@
   return assembler_->Implementation();
 }
 
 
 Handle<HeapObject> RegExpMacroAssemblerTracer::GetCode(Handle<String> source) {
   PrintF(" GetCode(%s);\n", *(source->ToCString()));
   return assembler_->GetCode(source);
 }
 
 }}  // namespace v8::internal