Implement loop for global regexps in regexp assembler.

src/regexp-macro-assembler-tracer.cc

Index: src/regexp-macro-assembler-tracer.cc
diff --git a/src/regexp-macro-assembler-tracer.cc b/src/regexp-macro-assembler-tracer.cc
index b7aeac48db38a96ba5f2673a44fc7e09b41ee06e..1a3d1e5988a1cad98e997dccbadc365f4de4db82 100644
--- a/src/regexp-macro-assembler-tracer.cc
+++ b/src/regexp-macro-assembler-tracer.cc
@@ -1,4 +1,4 @@
-// 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:
@@ -103,13 +103,15 @@ void RegExpMacroAssemblerTracer::PushBacktrack(Label* 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();
 }