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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114777] New: inconsistent warning for pure functions on
 deconstructors/constructors on arm compared to other targets
Date: Fri, 19 Apr 2024 00:22:48 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114777

            Bug ID: 114777
           Summary: inconsistent warning for pure functions on
                    deconstructors/constructors on arm compared to other
                    targets
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---
            Target: arm-eabi, arm-linux-gnueabi

Take:
```
struct A {
    A();
    [[gnu::pure]] ~A();
};
```

This warns on all targets except for arm-eabi (and arm-linux-gnueabi) due to
having targetm.cxx.cdtor_returns_this() return true.

I only noticed this while working on PR 19661 .=