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From: "philipp.tomsich at vrull dot eu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/109393] Very trivial address calculation does not fold
Date: Mon, 04 Sep 2023 13:06:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109393

--- Comment #8 from philipp.tomsich at vrull dot eu ---
On Mon, 4 Sept 2023 at 13:38, manolis.tsamis at vrull dot eu <
gcc-bugzilla@gcc.gnu.org> wrote:

> My current match.pd pattern to do that is below; any feedback or
> improvements
> are welcome.
>
> (simplify
>  (mult (convert@3 (plus @0 INTEGER_CST@1)) INTEGER_CST@2)
>   (with { tree tt =3D TREE_TYPE(@3); }
>    (if (INTEGRAL_TYPE_P (type)
>         && !TYPE_SATURATING (type)
>         && !TYPE_OVERFLOW_TRAPS (type)
>         && !TYPE_OVERFLOW_SANITIZED (type)
>         && !TYPE_OVERFLOW_WRAPS (TREE_TYPE (@0)))
>     (plus (mult (convert:tt @0) @2) (mult (convert:tt @1) @2)))))
>

Please attach a current .patch to this ticket to make sure that there are
no surprises in reproducing.=