On Thu, May 5, 2016 at 5:19 PM, Yuri Rumyantsev <ysrum...@gmail.com> wrote: > Hi All, > > Here is a simple patch which cures the problem with nonlegal > transformation of endless loop. THe fix is simply check that guard > edge destination is not loop latch block. > > Bootstrapping and regression testing did not show any new failures. > Is it OK for trunk?
Ok for trunk and branch. THanks, RIchard. > ChangeLog: > 2016-05-05 Yuri Rumyantsev <ysrum...@gmail.com> > > PR debug/70935 > * tree-ssa-loop-unswitch.c (find_loop_guard): Reject guard edge with > loop latch destination. > > gcc/testsuite/ChangeLog > * gcc.dg/torture/pr70935.c: New test.