[Bug tree-optimization/58417] Incorrect optimization in SCEV const-prop

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58417

Bug 58417 depends on bug 58473, which changed state.

Bug 58473 Summary: [4.9 regression] FAIL: 
ext/random/normal_mv_distribution/cons/default.cc (test for excess errors)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58473

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED