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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/107163] [10/11/12/13 Regression] huge Compile time increase
 when using templated base classes, virtual method, and Wall since
 r10-2823-g6a07489267e55084
Date: Tue, 28 Mar 2023 15:27:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107163

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:0e8fc610fb7112deb8c33c673a52983368dde9b7

commit r13-6910-g0e8fc610fb7112deb8c33c673a52983368dde9b7
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Mar 23 15:57:39 2023 -0400

    c-family: -Wsequence-point and COMPONENT_REF [PR107163]

    The patch for PR91415 fixed -Wsequence-point to treat shifts and ARRAY_=
REF
    as sequenced in C++17, and COMPONENT_REF as well.  But this is unnecess=
ary
    for COMPONENT_REF, since the RHS is just a FIELD_DECL with no actual
    evaluation, and in this testcase handling COMPONENT_REF as sequenced bl=
ows
    up fast in a deep inheritance tree.  Instead, look through it.

            PR c++/107163

    gcc/c-family/ChangeLog:

            * c-common.cc (verify_tree): Don't use sequenced handling
            for COMPONENT_REF.

    gcc/testsuite/ChangeLog:

            * g++.dg/warn/Wsequence-point-5.C: New test.=