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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/110334] [13/14 Regresssion] unused functions not eliminated
 before LTO streaming
Date: Thu, 22 Jun 2023 12:02:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110334

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the CTOR we call is built (well, cloned from that) via

implicitly_declare_fn (kind=3Dsfk_inheriting_constructor, type=3D<record_ty=
pe
0x7ffff3423e70 Vec>, const_p=3Dfalse, pattern_fn=3D<function_decl 0x7ffff34=
27600
__ct >, inherited_parms=3D<tree_list 0x7ffff34298c0>) at
/space/rguenther/src/gcc11queue/gcc/cp/method.cc:3245

and 'pattern_fn' has the always_inline attribute here but we don't seem
to copy that anywhere?

-fno-new-inheriting-ctors also "fixes" the optimization issue for me.

So do we fail to copy DECL_ATTRIBUTES for these kind of implicitely
declared functions (which are in fact explicitely declared?!)?=