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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/103275] [11/12 Regression] don't generate kmov with IE
 model relocations
Date: Thu, 18 Nov 2021 05:48:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103275

--- Comment #14 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to H.J. Lu from comment #11)
> (In reply to Hongtao.liu from comment #10)
> > I'm working on a patch which adds a new memory constraint "Bk" which wi=
ll
> > exclude TLS UNSPECs for mask register alternative.
> >=20
> > The UNSPEC i'm excluding is like below, any other UNSPEC needs to be ad=
ded?
> >=20
> > bool
> > ix86_notls_memory (rtx mem)
> > {
> >   gcc_assert (MEM_P (mem));
> >=20
> >   rtx addr =3D XEXP (mem, 0);
> >   subrtx_var_iterator::array_type array;
> >   FOR_EACH_SUBRTX_VAR (iter, array, addr, ALL)
> >     {
> >       rtx op =3D *iter;
> >       if (GET_CODE (op) =3D=3D 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:
>=20
> This doesn't look right.  For TARGET_64BIT, only
>=20
> 	kmovq	foo@gottpoff(%rip), %k0
> 	kmovq	foo@tlsld(%rip), %k0
It looks like gcc won't generate kmovq  foo@tlsld(%rip), %k0, but only leaq
 ("lea{q}\t{%&@tlsld(%%rip), %%rdi|rdi, %&@tlsld[rip]}", operands);=