From: Segher Boessenkool <seg...@kernel.crashing.org> Date: Fri, 4 Sep 2015 06:46:04 -0500
> On Thu, Sep 03, 2015 at 11:19:43PM -0700, David Miller wrote: >> The paradoxical subreg restriction in general_operand() is only >> enforced when reload_completed is true, which will not be the >> case while LRA is working. > > This one? > > #ifdef INSN_SCHEDULING > /* On machines that have insn scheduling, we want all memory > reference to be explicit, so outlaw paradoxical SUBREGs. > However, we must allow them after reload so that they can > get cleaned up by cleanup_subreg_operands. */ > if (!reload_completed && MEM_P (sub) > && GET_MODE_SIZE (mode) > GET_MODE_SIZE (GET_MODE (sub))) > return 0; > #endif > > I think you misread that. Also doc/rtl.texi makes pretty clear that > you really shouldn't see subregs of mem. So where does it come from? I see what you are saying, I'll take a look into this. Thanks.
