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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113838] regression of redundant load operation
 introduced by -fno-tree-forwprop introduce
Date: Fri, 09 Feb 2024 01:11:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113838

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64
          Component|tree-optimization           |target
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The difference from the gimple level IR:
```
  _14 =3D g_26[5][3][0];
  _15 =3D (int) _14;
  _16 =3D _13 ^ _15;
  g_51 =3D _16;
  if (_13 !=3D _15)
```

vs:
```
  _14 =3D g_26[5][3][0];
  _15 =3D (int) _14;
  _16 =3D _13 ^ _15;
  g_51 =3D _16;
  if (_16 !=3D 0)
    goto <bb 4>; [50.00%]
  else
    goto <bb 3>; [50.00%]
```


This is expected behavior even for the x86_64 target=