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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97684] [11 Regression] ICE in reg_preferred_class, at
 reginfo.c:789
Date: Sun, 27 Dec 2020 16:54:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97684

Arseny Solokha <asolokha at gmx dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|powerpc-*-linux-gnu         |powerpc-*-linux-gnu,
                   |                            |x86_64-unknown-linux-gnu

--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
void
c5 (double);

void
g4 (int *n4)
{
  double lp =3D 0.0;
  int fn;

  for (fn =3D 0; fn < 18; ++fn)
    {
      int as;

      as =3D __builtin_abs (n4[fn]);
      if (as > lp)
        lp =3D as;
    }

  c5 (lp);
}

% x86_64-unknown-linux-gnu-gcc-11.0.0 -O1 -flive-range-shrinkage
-fschedule-insns -fselective-scheduling -funroll-all-loops -fno-web -c
s0owgzp5.c
during RTL pass: ira
s0owgzp5.c: In function 'g4':
s0owgzp5.c:20:1: internal compiler error: in reg_preferred_class, at
reginfo.c:794
   20 | }
      | ^
0x6b0710 reg_preferred_class(int)
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gc=
c/reginfo.c:794
0xc0f2e8 update_equiv_regs
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gc=
c/ira.c:3521
0xc154c5 ira
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gc=
c/ira.c:5554
0xc154c5 execute
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201220/work/gcc-11-20201220/gc=
c/ira.c:5945

(As of gcc-11.0.0-alpha20201220 snapshot,
g:18e86fae2a14f78e70aae06afce6bb9853068bb1.)=