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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/55157] Missed VRP with != 0 and multiply
Date: Fri, 04 Nov 2022 11:39:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D55157

--- Comment #5 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to Aldy Hernandez from comment #4)

> +  // Reflect the mask as a simple range.  For example, a mask of
> +  // 0xff00 could be represented as [0,0][0x100, 0xffff].
> +  if (TYPE_UNSIGNED (type ()) && prec > 1)

Bonus points for making it work with signed.  I'm not smart enough to do th=
at
:).=