[Bug tree-optimization/106922] [12 Regression] Bogus uninitialized warning on boost::optional<<std::vector<std::string>>>, missed FRE

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106922

--- Comment #29 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:641369e29f57c508e6316d5d221c1a92900163f9

commit r12-8836-g641369e29f57c508e6316d5d221c1a92900163f9
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Sep 23 09:46:59 2022 +0200

    testsuite: Fix up pr106922.C test

    On Thu, Sep 22, 2022 at 01:10:08PM +0200, Richard Biener via Gcc-patches
wrote:
    >       * g++.dg/tree-ssa/pr106922.C: Adjust.

    > --- a/gcc/testsuite/g++.dg/tree-ssa/pr106922.C
    > +++ b/gcc/testsuite/g++.dg/tree-ssa/pr106922.C
    > @@ -87,5 +87,4 @@ void testfunctionfoo() {
    >    }
    >  }
    >
    > -// { dg-final { scan-tree-dump-times "Found fully redundant value" 4
"pre" { xfail { ! lp64 } } } }
    > -// { dg-final { scan-tree-dump-not "m_initialized" "cddce3" { xfail { !
lp64 } } } }
    > +// { dg-final { scan-tree-dump-not "m_initialized" "dce3" } }

    I've noticed
    +UNRESOLVED: g++.dg/tree-ssa/pr106922.C  -std=gnu++20  scan-tree-dump-not
dce3 "m_initialized"
    +UNRESOLVED: g++.dg/tree-ssa/pr106922.C  -std=gnu++2b  scan-tree-dump-not
dce3 "m_initialized"
    with this change, both on x86_64 and i686.
    The dump is still cddce3, additionally as the last reference to the pre
    dump is gone, not sure it is worth creating that dump.

    With the following patch, there aren't FAILs nor UNRESOLVED tests with
    GXX_TESTSUITE_STDS=98,11,14,17,20,2b make check-g++
RUNTESTFLAGS="--target_board=unix\{-m32,-m64\} dg.exp='pr106922.C'"

    2022-09-23  Jakub Jelinek  <jakub@redhat.com>

            PR tree-optimization/106922
            * g++.dg/tree-ssa/pr106922.C: Scan in cddce3 dump rather than
            dce3.  Remove -fdump-tree-pre-details from dg-options.

    (cherry picked from commit a0de11d0d22054b6fd76a0730a3ec807542379d0)