------- Comment #13 from amacleod at redhat dot com 2008-09-17 14:34 ------- I was in the middle of updating this PR and taking possesion :-)
Upon further reflection, I don't think it is acceptable for out-of-ssa to generate incorrect code simply because an optimization wasn't run before it. So, there are 2 basic choices. ONnis as you state, only there is an additional bit required during the rewrite verification. The other option is a very mini dead phi removal done at the same time as virtual phis are eliminated. its only a few lines of code and simple removes PHIs with no uses, and takes care of the ripple effect as well. I have a patch for it as well, its just not completely tested yet. I'll attach both in a minute, I just wanted you to know I was looking at it :-) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37102
