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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/107127] [11/12/13 Regression] Long compile times on code with
 C complex since r11-3299-gcba079f354a55363
Date: Mon, 03 Oct 2022 19:52:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107127

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
If anything it is the walk of the tree in c_genericize (c-gimplify.c)
Which is causing the issue.

+      walk_tree (&DECL_SAVED_TREE (fndecl), c_genericize_control_r,
+                NULL, NULL);

I suspect walk_tree_without_duplicates might fix this rather than using
walk_tree here.=