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Re: PRE (sometimes) confuses ivopts/scev?

From: Daniel Berlin <dberlin at dberlin dot org>
To: Andrew Pinski <pinskia at physics dot uc dot edu>
Cc: gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org, Richard Guenther <rguenth at tat dot physik dot uni-tuebingen dot de>, Ulrich Weigand <uweigand at de dot ibm dot com>
Date: Wed, 26 Jan 2005 11:10:42 -0500 (EST)
Subject: Re: PRE (sometimes) confuses ivopts/scev?
References: <Pine.LNX.4.44.0501261017180.16464-100000@alwazn.tat.physik.uni-tuebingen.de><Pine.LNX.4.60.0501261013560.23907@dberlin.org><1A06AC97-6FB3-11D9-A10C-000A95D692F4@physics.uc.edu>

On Wed, 26 Jan 2005, Andrew Pinski wrote:

On Jan 26, 2005, at 10:52 AM, Daniel Berlin wrote:

However, if i attempt to fix this by adding a DCE pass after PRE, tree if-convert screws up the cfg completely, and fails its tests anyway (verify_ssa failure)
yes there was a patch for this.

There were multiple problems with ifconv here, and i only remembre one patch. See PR 18815

References:
- Re: PRE (sometimes) confuses ivopts/scev?
  - From: Richard Guenther
- Re: PRE (sometimes) confuses ivopts/scev?
  - From: Daniel Berlin
- Re: PRE (sometimes) confuses ivopts/scev?
  - From: Andrew Pinski

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