From: Diego Novillo <dnovillo@redhat.com>
To: Daniel Berlin <dberlin@dberlin.org>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
Andrew Macleod <amacleod@redhat.com>
Subject: Re: [PATCH]: Implement must-def kill operand
Date: Wed, 20 Oct 2004 20:36:00 -0000 [thread overview]
Message-ID: <1098304350.22552.47.camel@localhost.localdomain> (raw)
In-Reply-To: <C69F1F35-22C4-11D9-B310-000D93B1B044@dberlin.org>
On Wed, 2004-10-20 at 14:20, Daniel Berlin wrote:
> 1. Do a quick propagation pass in DCE to make sure def-def phis that
> are used in necessary statements don't die. (at that point, plain
> def-def renaming will work)
> 2. Mark the must-def operand as necessary if it's a phi, and the only
> immediate use of the phi is in the must-def operand (I'm assuming it
> could appear in a may-def or vuse somewhere else, in which case it's
> necessary).
> 3. Use the full renamer, which will simply put the phi back after DCE
> removes it.
>
4. If the RHS of a V_MUST_DEF is a PHI node, mark it necessary?
Diego.
next prev parent reply other threads:[~2004-10-20 20:32 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-18 2:29 Daniel Berlin
2004-10-20 17:41 ` Diego Novillo
2004-10-20 17:56 ` Daniel Berlin
2004-10-20 18:08 ` Diego Novillo
2004-10-20 18:28 ` Daniel Berlin
2004-10-20 20:36 ` Diego Novillo [this message]
2004-10-20 20:49 ` Daniel Berlin
2004-10-20 20:57 ` Diego Novillo
2004-10-20 21:01 ` Daniel Berlin
[not found] ` <531813B6-22DA-11D9-B310-000D93B1B044@dberlin.org>
2004-10-20 21:04 ` Diego Novillo
2004-10-20 21:27 ` Daniel Berlin
2004-10-20 22:23 ` Andrew Pinski
2004-10-23 5:02 ` Mark Mitchell
2004-10-23 12:56 ` Diego Novillo
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