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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/107127] [11/12 Regression] Long compile times on code with C
 complex since r11-3299-gcba079f354a55363
Date: Fri, 10 Feb 2023 17:43:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107127

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:b585bd941ea2e5c1cca52e40210483b556ce2ed7

commit r12-9120-gb585bd941ea2e5c1cca52e40210483b556ce2ed7
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Nov 23 19:09:31 2022 +0100

    c: Fix compile time hog in c_genericize [PR107127]

    The complex multiplications result in deeply nested set of many SAVE_EX=
PRs,
    which takes even on fast machines over 5 minutes to walk.
    This patch fixes that by using walk_tree_without_duplicates where it is
    instant.

    2022-11-23  Andrew Pinski  <apinski@marvell.com>
                Jakub Jelinek  <jakub@redhat.com>

            PR c/107127
            * c-gimplify.cc (c_genericize): Use walk_tree_without_duplicates
            instead of walk_tree for c_genericize_control_r.

            * gcc.dg/pr107127.c: New test.

    (cherry picked from commit 8a0fce6a51915c29584427fd376b40073c328090)=