http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46556
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> 2010-11-22 11:15:01 UTC --- On Mon, 22 Nov 2010, amodra at gmail dot com wrote: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46556 > > --- Comment #4 from Alan Modra <amodra at gmail dot com> 2010-11-22 10:47:24 > UTC --- > But within a loop gcc-4.2 looked quite reasonable too.. Of course. > Don't we have a pass ordering problem if fwprop is to rewrite addresses? We > currently have cse1, fwprop1, loop passes, cse2, fwprop2. Well, fwprop was only a suggestion (I can't think of something better right now, maybe apart from expand (ugh), or better a pattern recognizer before expand). We really can't rely on expression canonicalization fold does for addressing mode selection. We have to do this somewhere else (and IVOPTs does it for code inside loops).
