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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug analyzer/99212] [11 Regression] gcc.dg/analyzer/data-model-1.c
 line 971
Date: Thu, 25 Feb 2021 23:02:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99212

--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Failing test is in test_45 at:
  __analyzer_eval (bits.b0 =3D=3D 1); /* { dg-warning "TRUE" "desired" { xf=
ail
*-*-* } } */
  /* { dg-warning "UNKNOWN" "status quo" { target *-*-* } .-1 } */


x86_64-pc-linux-gnu has:
  bits.b0 =3D 1;
  _1 =3D BIT_FIELD_REF <bits, 8, 0>;
  _2 =3D _1 & 1;
  _3 =3D _2 !=3D 0;
  _4 =3D (int) _3;
  __analyzer_eval (_4);
  bits.b0 =3D 1;
  _1 =3D BIT_FIELD_REF <bits, 8, 0>;
  _2 =3D _1 & 1;
  _3 =3D _2 !=3D 0;
  _4 =3D (int) _3;
  __analyzer_eval (_4);

whereas cris-axis-elf has:
  bits.b0 =3D 1;
  _1 =3D VIEW_CONVERT_EXPR<unsigned char>(bits);
  _2 =3D _1 & 1;
  _3 =3D _2 !=3D 0;
  _4 =3D (int) _3;
  __analyzer_eval (_4);
  bits.b456 =3D 5;
  _5 =3D VIEW_CONVERT_EXPR<unsigned char>(bits);
  _6 =3D _5 & 112;
  _7 =3D _6 =3D=3D 80;
  _8 =3D (int) _7;
  __analyzer_eval (_8);

BIT_FIELD_REF doesn't work (hence the "UNKNOWN" in the expected output),
whereas the first VIEW_CONVERT_EXPR does work, unexpectedly emitting "TRUE",
hence the XPASS (and the FAIL on the "UNKNOWN" directive, which is there to
swallow the "UNKNOWN" output)=