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From: "user202729 at protonmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/115381] New: Missed deoptimization
 opportunity when comparing two different linker symbols
Date: Fri, 07 Jun 2024 04:45:03 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 15.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: user202729 at protonmail dot com
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115381

            Bug ID: 115381
           Summary: Missed deoptimization opportunity when comparing two
                    different linker symbols
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: user202729 at protonmail dot com
  Target Milestone: ---

Code:

```
int x();
int y();

int z(){ return &x =3D=3D &y; }
```

Clang optimizes this to 0. GCC doesn't.

Godbolt link: https://godbolt.org/z/8rGbbdrbe=