https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103275
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Hongtao.liu from comment #10)
> I'm working on a patch which adds a new memory constraint "Bk" which will
> exclude TLS UNSPECs for mask register alternative.
>
> The UNSPEC i'm excluding is like below, any other UNSPEC needs to be added?
>
> bool
> ix86_notls_memory (rtx mem)
> {
> gcc_assert (MEM_P (mem));
>
> rtx addr = XEXP (mem, 0);
> subrtx_var_iterator::array_type array;
> FOR_EACH_SUBRTX_VAR (iter, array, addr, ALL)
> {
> rtx op = *iter;
> if (GET_CODE (op) == UNSPEC)
> switch (XINT (op, 1))
> {
> case UNSPEC_GOTTPOFF:
> case UNSPEC_GOTNTPOFF:
> case UNSPEC_TP:
> case UNSPEC_TLS_GD:
> case UNSPEC_TLS_LD_BASE:
> case UNSPEC_TLSDESC:
> case UNSPEC_TLS_IE_SUN:
This doesn't look right. For TARGET_64BIT, only
kmovq foo@gottpoff(%rip), %k0
kmovq foo@tlsld(%rip), %k0
should be disallowed. For !TARGET_64BIT, only
kmovd foo@gotntpoff(%eax), %k0
kmovd foo@tpoff(%eax), %k0
should be disallowed.
> return false;
> default:
> break;
> }
> /* Should iter.skip_subrtxes ();
> if there's no inner UNSPEC in addr???. */
> }
>
> return true;
> }
