On Sat, Jan 18, 2014 at 10:37:18AM +0000, Richard Sandiford wrote:
> Review ping for this patch. IMO it almost counts as obviously correct
> but just in case...
>
> Kito Cheng <k...@0xlab.org> writes:
> > expand_movstr is work fine when we don't define movstr pattern or
> > always expand it successfully, however it's will crash when if movstr
> > expand fail since expand_insn expect always expand successfully (it's
> > place a gcc_unreachable() when expand fail).
> >
> > this patch use maybe_expand_insn instead of expand_insn, check it done
> > or not and just return NULL_RTX for generate a libcall if fail to
> > expand movstr.
> >
> > 2014-01-11 Kito Cheng <k...@0xlab.org>
> >
> > * gcc/builtins.c (expand_movstr): Check movstr expand done or fail.
Ok.
> > --- a/gcc/builtins.c
> > +++ b/gcc/builtins.c
> > @@ -3239,7 +3239,8 @@ expand_movstr (tree dest, tree src, rtx target, int
> > endp)
> > create_output_operand (&ops[0], endp ? target : NULL_RTX, Pmode);
> > create_fixed_operand (&ops[1], dest_mem);
> > create_fixed_operand (&ops[2], src_mem);
> > - expand_insn (CODE_FOR_movstr, 3, ops);
> > + if (!maybe_expand_insn (CODE_FOR_movstr, 3, ops))
> > + return NULL_RTX;
> >
> > if (endp && target != const0_rtx)
> > {
Jakub
