https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107088
--- Comment #8 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- (In reply to Stefan Schulze Frielinghaus from comment #6) > I did a quick test using > > diff --git a/gcc/cselib.cc b/gcc/cselib.cc > index 9b582e5d3d6..2fd0190bc79 100644 > --- a/gcc/cselib.cc > +++ b/gcc/cselib.cc > @@ -1571,6 +1571,7 @@ new_cselib_val (unsigned int hash, machine_mode mode, > rtx x) > > scalar_int_mode int_mode; > if (REG_P (x) && is_int_mode (mode, &int_mode) > + && int_mode != BImode > && REG_VALUES (REGNO (x)) != NULL > && (!cselib_current_insn || !DEBUG_INSN_P (cselib_current_insn))) > { > > which solved the cross ia64 build for me. Maybe there are further integer > modes which I didn't consider, i.e., I will have a thorough look at it next > week. Looks good, but maybe: GET_MODE_SIZE (int_mode) > 1 would be more general. BImode being MODE_INT is a horrible wart (it should be MODE_PARTIAL_INT instead). But unfortunately ia64 is the target that would be most affected by "fixing" this, and it's not an easy target to test. So I think in practice nothing will change while ia64 is the in tree.