https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91255
--- Comment #2 from ktkachov at gcc dot gnu.org --- Author: ktkachov Date: Fri Aug 16 09:32:36 2019 New Revision: 274564 URL: https://gcc.gnu.org/viewcvs?rev=274564&root=gcc&view=rev Log: [gensupport] PR 91255: Do not error out immediately on set_attr_alternative with define_subst I'm trying to add a define_subst use in the arm backend but am getting many build errors complaining about: `set_attr_alternative' is unsupported by `define_subst' Looking at the gensupport.c code it iterates over all define_insns and errors if any of them have set_attr_alternative. The usecase I'm targetting doesn't involve patterns with set_attr_alternative, so I would like to make the define_subst handling more robust to only error out if the define_subst is actually attempted on a set_attr_alternative. This patch produces the error only if the set_attr_alternative attr matches the subst name. This allows a build of the arm backend with a define_subst usage to succeed. PR other/91255 * gensupport.c (has_subst_attribute): Error out on set_attr_alternative only if subst_name matches curr_attr string. Modified: trunk/gcc/ChangeLog trunk/gcc/gensupport.c
