More gimple_phi
This corresponds to:
[PATCH 53/89] More gimple_phi
https://gcc.gnu.org/ml/gcc-patches/2014-04/msg01200.html
from the original 89-patch kit
That earlier patch was approved by Jeff:
> Ok once prerequisites have gone in.
in https://gcc.gnu.org/ml/gcc-patches/2014-05/msg00812.html
gcc/
* gimple.h (gimple_phi_set_result): Require a gimple_phi rather
than a plain gimple.
(gimple_phi_set_arg): Likewise.
* tree-outof-ssa.c (remove_gimple_phi_args): Likewise; add a checked
cast to gimple_phi.
* tree-sra.c (replace_removed_params_ssa_names): Add a checked
cast to gimple_phi.