From: Paolo Bonzini <paolo.bonzini@lu.unisi.ch>
To: Leehod Baruch <LEEHOD@il.ibm.com>, GCC Development <gcc@gcc.gnu.org>
Subject: Re: Question about merging two instructions.
Date: Mon, 22 Aug 2005 14:42:00 -0000 [thread overview]
Message-ID: <4309E41B.6090502@lu.unisi.ch> (raw)
In-Reply-To: <OF6BB453A0.91AAF632-ONC2257065.004BFE98-C2257065.004E32C4@il.ibm.com>
>Note that I don't want to replace any *def* and uses may appear in the
>LHS.
>
>
Ok, I see. But you have to cope with *def*s appearing in the LHS: you
don't want to replace them, yet your modified simplify_replace_rtx will!
>My plan was to use: replace_regs () to replace every use of (reg r)
>with the a new pseudo register (because this is the only function that
>I found that separates the uses from the defs)
>
Not really, as it will happily replace within a STRICT_LOW_PART, but
that may as well be a bug.
I think you're best off making your own function for now. And make it
use validate_change so that you won't have to call recog manually.
Paolo
prev parent reply other threads:[~2005-08-22 14:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-21 13:52 Leehod Baruch
2005-08-21 16:55 ` Roger Sayle
2005-08-21 17:54 ` Leehod Baruch
2005-08-22 7:38 ` Paolo Bonzini
2005-08-22 13:33 ` Leehod Baruch
2005-08-22 13:37 ` Paolo Bonzini
2005-08-22 16:30 ` Richard Henderson
2005-08-22 13:49 ` Roger Sayle
2005-08-22 7:10 ` Paolo Bonzini
2005-08-22 14:12 ` Leehod Baruch
2005-08-22 14:42 ` Paolo Bonzini [this message]
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