------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2004-12-10 18:38 ------- Subject: Re: [4.0 regression] loop miscompilation at -O1 (-ftree-ch)
> > or simply use dominated_by_p, which is not too expensive - > > only a couple of "if" statements, assuming the dominator infomatino is > > available. > EDGE_DFS_BACK would have been more efficient. But I don't think it's > 100% safe right now. not that much. Since you do not change cfg in the progress of dominator optimizations, you should have fast query structure for dominators up-to-date; i.e. testing whether a basic block dominates other takes only two comparisons of integers. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18694 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
