Review URL: http://codereview.chromium.org/19751 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1207 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Allows backtracking to clear registers instead of pushing and popping them to restore state. Redo of 1135 with bug fixed. git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1156 ce2b1a6d-e550-0410-aec6-3dcde31c8c00