This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: CSE not combining equivalent expressions.

From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
To: law at redhat dot com
Cc: NAMOLARU at il dot ibm dot com, gcc at gnu dot org, pranav dot bhandarkar at gmail dot com
Date: Thu, 18 Jan 2007 07:14:59 EST
Subject: Re: CSE not combining equivalent expressions.
References: <OF0B7D487A.762EDEE1-ONC2257266.00506C35-42257266.00557D4D@il.ibm.com> <649555d50701172314g31f2575x1128d344833b7824@mail.gmail.com> <1169109100.4481.14.camel@sweet.slc.redhat.com>

> Basically we keep track of the known zero, sign bit copies and known 
> nonzero bits for SSA names, then propagate them in the obvious ways.
> Basically replicating a lot of what combine & cse do in this area,
> but at the tree level.   It's something I've always wanted to see
> implemented, but never bothered to do...

Likewise!

References:
- Re: CSE not combining equivalent expressions.
  - From: Mircea Namolaru
- Re: CSE not combining equivalent expressions.
  - From: pranav bhandarkar
- Re: CSE not combining equivalent expressions.
  - From: Jeffrey Law

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]