http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53948
--- Comment #8 from Jeffrey A. Law <law at redhat dot com> 2013-02-07 20:46:10 UTC --- Also note the patch, to the best of my knowledge, was not ping'd. As a regression (and a P1 regression I might add) I would have expected Steven to ping the patch and/or Jakub to have pushed harder for reversion of the original patch which caused the regression per our patch reversion policy. Either way it was not handled well. WRT on-the side datastructures. The on-the-side structure here is the existing tree structures. At some point all the linkage between RTL structures and tree structures needs to be sorted out, but I don't think now is the time nor do I think the amount of usage here justifies using a precious bit in our base rtl structure.