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Re: [ tree-ssa] PRE problem

From: Daniel Berlin <dberlin at dberlin dot org>
To: law at redhat dot com
Cc: gcc at gcc dot gnu dot org
Date: Fri, 20 Feb 2004 18:44:57 -0500
Subject: Re: [ tree-ssa] PRE problem
References: <200402201905.i1KJ5bgQ001845@speedy.slc.redhat.com>

In fact, no backwards subst PRE is performing should be between things
with different memory tags, since it only changes phi results into the
associated phi argument for that edge.
This shouldn't ever change the memory tag.

Wrong again.

Then this was changed at some point. Whoever changed it so that some of these things could have null memory tags should have mentioned this, and i would have pointed out that they needed to update PRE.

jeff

References:
- Re: [ tree-ssa] PRE problem
  - From: law

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