tree-ssa-loop-ivopts.c: use gimple_phi in a few places
This corresponds to:
[PATCH 16/89] tree-ssa-loop-ivopts.c: use gimple_phi in a few places
https://gcc.gnu.org/ml/gcc-patches/2014-04/msg01165.html
from the original 89-patch kit
That earlier patch was approved by Jeff:
> OK when prerequisites have gone in.
> Actually that's true for #17 & #18 as well.
in https://gcc.gnu.org/ml/gcc-patches/2014-05/msg00626.html
gcc/
* tree-ssa-loop-ivopts.c (determine_biv_step): Require a gimple_phi.
(find_bivs): Convert local "phi" into a gimple_phi.
(mark_bivs): Likewise.