[Bug tree-optimization/85712] [8/9 Regression] ICE in all_phi_incrs_profitable_1 at gcc/gimple-ssa-strength-reduction.c:3479

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85712

--- Comment #7 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Patch from c#6 corrects a problem discovered when backporting to GCC 6.  With
the two patches, no regressions are seen in trunk, 8, 7, or 6.