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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114691] New: [11/12/13/14 Regression] Bogus ignoring loop
 annotation warning
Date: Thu, 11 Apr 2024 10:08:42 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: ice-on-valid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114691

            Bug ID: 114691
           Summary: [11/12/13/14 Regression] Bogus ignoring loop
                    annotation warning
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org, jason at gcc dot gnu.org,
                    pinskia at gcc dot gnu.org, ppalka at gcc dot gnu.org,
                    sjames at gcc dot gnu.org, webrown.cpp at gmail dot com
        Depends on: 114409
  Target Milestone: ---

+++ This bug was initially created as a clone of Bug #114409 +++

As the PR114409 initially reported P1 bug is now fixed, I'm cloning it for =
the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114409#c10 regression.

int foo (int);

void
qux (int x)
{
  #pragma GCC ivdep
  while (int y =3D foo (x))
    ++y;
}

With no options this didn't emit any warnings e.g. in r200000 (i.e. in GCC
4.9), while
it emits
pr114409-2.C:7:24: warning: ignoring loop annotation
warning in r220000 (i.e. in GCC 5+).
Can't bisect easily, because in various revisions in between it ICEs on
ANNOTATE_EXPR.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114409
[Bug 114409] [14 Regression] ICE after adding novector pragmas (internal
compiler error: in tsubst_expr, at cp/pt.cc:21794) since
r14-4229-g9c62af101e11e1cce573c2b3d2e18b403412dbc8=