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From: "sjames at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/112430] [14 Regression] ICE: verify_ssa
 failed, missing definition
Date: Wed, 08 Nov 2023 00:50:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112430

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
Reduced:
```
int secp256k1_scalar_reduce_512_r_0_0, secp256k1_scalar_reduce_512_m6,
    secp256k1_scalar_reduce_512_m9, secp256k1_scalar_reduce_512_th,
    secp256k1_scalar_reduce_512_tl;
unsigned int secp256k1_scalar_reduce_512_c0;
void secp256k1_scalar_reduce_512() {
  unsigned int c1, c2 =3D c1 < secp256k1_scalar_reduce_512_th;
  int over =3D secp256k1_scalar_reduce_512_c0 < secp256k1_scalar_reduce_512=
_m9;
  c1 +=3D over;
  c2 +=3D c1 < over;
  secp256k1_scalar_reduce_512_c0 =3D c1;
  c1 =3D c2;
  c2 =3D secp256k1_scalar_reduce_512_c0 +=3D secp256k1_scalar_reduce_512_m6;
  over =3D secp256k1_scalar_reduce_512_c0 < secp256k1_scalar_reduce_512_m6;
  c1 +=3D over;
  secp256k1_scalar_reduce_512_th +=3D
      secp256k1_scalar_reduce_512_c0 < secp256k1_scalar_reduce_512_tl;
  c1 +=3D secp256k1_scalar_reduce_512_th;
  c2 +=3D c1 < secp256k1_scalar_reduce_512_th;
  secp256k1_scalar_reduce_512_r_0_0 =3D c2;
}
void secp256k1_ecdsa_sig_sign() { secp256k1_scalar_reduce_512(); }
```=