From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D796E3858418; Wed, 13 Sep 2023 07:56:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D796E3858418 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1694591768; bh=oJTTuv6iFxJAqrU2W/oS75YNcIafGjzXT/8/p1MgUa8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=slw70WbwNaRZ4/smn6PNxsMvKAe9QoLocyLWBDWW7ZcVfwFThSybch0uFcU9phujJ 3hMrn8iDMkgym58Ze3aefiyRJ39QHZT70dxxs0QzCwi/WzXXb4l1oiWlNZlbgaVKeh BqH+afrRKkuiTKleqUN3HHEUZ1CdxESZaG9ioeeE= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/110751] RISC-V: Suport undefined value that allows VSETVL PASS use TA/MA Date: Wed, 13 Sep 2023 07:56:06 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110751 --- Comment #31 from Richard Biener --- On GIMPLE an "undefined" operand representation would be the default defini= tion of an SSA name with the appropriate type. That's a somewhat "heavy" representation and it also doesn't fit the target hook return value nicely, but we could handle a NULL_TREE return value from the target hook in the way to create such SSA name.=