http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60438
--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Richard Henderson from comment #29) > linj, that hunk is required. It's easy to produce a difference ICE > without it. I believe that even this pr's test case with -fno-crossjumping > is enough to trigger the different ICE. > > Jakub, it's way more difficult to merge these notes than one might think. > Primarily because CSA hasn't done full CFA analysis. It might be possible > to merge two REG_CFA_ADJUST_CFA relatively easily. But I'm not really sure > how common that is. Certainly it didn't happen in this test case at all. > > I think at this point, any such optimization will have to wait for stage1. I'll try to gather some statistics on the combine-stack-adj.c hunk alone tomorrow.
