[Bug inline-asm/98847] Miscompilation with c++17, templates, and register keyword

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98847

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:6bb207b468da36d9d99c63409dc4098514759c90

commit r11-6958-g6bb207b468da36d9d99c63409dc4098514759c90
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Jan 28 16:13:11 2021 +0100

    c++: Fix up handling of register ... asm ("...") vars in templates
[PR33661, PR98847]

    As the testcase shows, for vars appearing in templates, we don't attach
    the asm spec string to the pattern decls, nor pass it back to
cp_finish_decl
    during instantiation.

    The following patch does that.

    2021-01-28  Jakub Jelinek  <jakub@redhat.com>

            PR c++/33661
            PR c++/98847
            * decl.c (cp_finish_decl): For register vars with asmspec in
templates
            call set_user_assembler_name and set DECL_HARD_REGISTER.
            * pt.c (tsubst_expr): When instantiating DECL_HARD_REGISTER vars,
            pass asmspec_tree to cp_finish_decl.

            * g++.target/i386/pr98847.C: New test.