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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/108880] [11/12/13 Regression] slow compilation with "-fsanitize=undefined"
Date: Wed, 22 Feb 2023 20:06:20 +0000 [thread overview]
Message-ID: <bug-108880-4-kAjnYyOcNV@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-108880-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108880
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #10)
> Another simple patch is
>
> --- a/gcc/c-family/c-gimplify.cc
> +++ b/gcc/c-family/c-gimplify.cc
> @@ -516,7 +516,7 @@ c_genericize_control_stmt (tree *stmt_p, int
> *walk_subtrees, void *data,
> tree t = tsi_stmt (i);
> if (TREE_CODE (t) != DEBUG_BEGIN_STMT && nondebug_stmts < 2)
> nondebug_stmts++;
> - walk_tree_1 (tsi_stmt_ptr (i), func, data, NULL, lh);
> + walk_tree_without_duplicates_1 (tsi_stmt_ptr (i), func, data, lh);
> if (TREE_CODE (t) != DEBUG_BEGIN_STMT
> && (nondebug_stmts > 1 || TREE_SIDE_EFFECTS (tsi_stmt (i))))
> clear_side_effects = false;
But that creates another pset, this time another one for each statement in each
STATEMENT_LIST seen. That would be terribly expensive.
While the cp_genericize_r pset is just one for the whole function, the one used
by
walk_tree_without_duplicates for C is also one for the whole function.
next prev parent reply other threads:[~2023-02-22 20:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-22 6:41 [Bug sanitizer/108880] New: " qrzhang at gatech dot edu
2023-02-22 6:51 ` [Bug sanitizer/108880] [11/12/13 Regression] " pinskia at gcc dot gnu.org
2023-02-22 6:53 ` pinskia at gcc dot gnu.org
2023-02-22 6:54 ` pinskia at gcc dot gnu.org
2023-02-22 7:12 ` pinskia at gcc dot gnu.org
2023-02-22 10:25 ` [Bug c/108880] " rguenth at gcc dot gnu.org
2023-02-22 10:25 ` rguenth at gcc dot gnu.org
2023-02-22 15:41 ` mpolacek at gcc dot gnu.org
2023-02-22 15:51 ` mpolacek at gcc dot gnu.org
2023-02-22 16:16 ` mpolacek at gcc dot gnu.org
2023-02-22 18:24 ` mpolacek at gcc dot gnu.org
2023-02-22 19:46 ` mpolacek at gcc dot gnu.org
2023-02-22 19:48 ` jakub at gcc dot gnu.org
2023-02-22 19:50 ` mpolacek at gcc dot gnu.org
2023-02-22 20:06 ` jakub at gcc dot gnu.org [this message]
2023-02-22 20:14 ` mpolacek at gcc dot gnu.org
2023-02-22 20:46 ` jakub at gcc dot gnu.org
2023-02-22 20:51 ` mpolacek at gcc dot gnu.org
2023-02-22 22:47 ` cvs-commit at gcc dot gnu.org
2023-02-22 22:48 ` [Bug c/108880] [11/12 " mpolacek at gcc dot gnu.org
2023-03-04 18:02 ` cvs-commit at gcc dot gnu.org
2023-03-07 17:45 ` [Bug c/108880] [11 " mpolacek at gcc dot gnu.org
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