Fwd: xtensa PR65730

[Max Filippov]

Hi Sterling,

I've got the following bug report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65730

The core in question doesn't have hardware multiplication, so when
init_alignment_context calls

      ac->shift = expand_simple_binop (SImode, MULT, ac->shift,
                                       GEN_INT (BITS_PER_UNIT),
                                       NULL_RTX, 1, OPTAB_DIRECT);

it gets NULL, and using that NULL later results in segfault.

Changing OPTAB_DIRECT to OPTAB_LIB fixes it, I wonder if that fix
is right?
OTOH calling helper function to do multiplication by a constant 8 looks
rather stupid. I guess we're not going to have non-8-bit bytes on xtensa
anytime soon, maybe this multiplication can be replaced with shift?

-- 
Thanks.
-- Max