[PATCH][Middle-end]patch for fixing PR 86519

[Paul Hua]

Hi, Qing,

The cfarm machine gcc23 can build mips64el successful, configure with
"../configure --prefix=/opt/gcc-9 MISSING=texinfo MAKEINFO=missing
--target=mips64el-linux-gnu --enable-languages=c,c++
On Tue, Aug 21, 2018 at 7:02 AM Qing Zhao <qing.zhao@oracle.com> wrote:
>
> Hi, Paul,
>
> I was trying to repeat this issue on a mips machine today, but failed…
>
> the only mips machines I can access are those in gcc compile farm, I chose gcc22, but failed to build GCC on this machine.
>
> do you know any other machine in gcc compile farm that can repeat this issue?
>
> thanks a lot.
>
> Qing
> > On Aug 17, 2018, at 10:43 PM, Paul Hua <paul.hua.gm@gmail.com> wrote:
> >
> > Hi Qing:
> >
> >>
> >> the change has been committed as:
> >> https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=263563 <https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=263563>
> >>
> >> Qing
> >>
> >
> > The strcmpopt_6.c test still fails on mips64el target.
> >
> > gcc.dg/strcmpopt_6.c: memcmp found 4 times
> > FAIL: gcc.dg/strcmpopt_6.c scan-assembler-times memcmp 2
> >
> >
> > The mips asm output have ".reloc" info.
> >
> > -------------------------------------------------------------------------
> >        ld      $5,%got_page(.LC0)($28)
> >        ld      $25,%call16(memcmp)($28)
> >        li      $6,3                    # 0x3
> >        sd      $31,8($sp)
> >        .reloc  1f,R_MIPS_JALR,memcmp
> > 1:      jalr    $25
> >        daddiu  $5,$5,%got_ofst(.LC0)
> > ----------------------------------------------------------------------------
> >
> > scan-assembler find "4" times.
> >
> > Thanks
> > Paul Hua
>