https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78669
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|segher at gcc dot gnu.org |vmakarov at gcc dot
gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The insn 125 is removed in earlier iteration of the combine_and_move_insns
loop, when processing regno 119, insn 25 is deleted:
remove_death (regno, use_insn);
SET_REG_N_REFS (regno, 0);
REG_FREQ (regno) = 0;
delete_insn (def_insn);
So, I think either combine_and_move_insns should not assert there are still
some non-debug uses and instead just do partly what it does if it replaces the
uses of regno in use_insn with the equiv replacement, or when deleting some
def_insn it should also adjust the uses, or we should just continue if we find
replaceable regs without any uses.
