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Re: Another case of DCE deleting live code

From: Daniel Berlin <dberlin at dberlin dot org>
To: Diego Novillo <dnovillo at redhat dot com>
Cc: Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>, Richard Henderson <rth at redhat dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Tue, 9 Nov 2004 18:09:10 -0500 (EST)
Subject: Re: Another case of DCE deleting live code
References: <10411092207.AA07320@vlsi1.ultra.nyu.edu><1100041056.14048.71.camel@localhost.localdomain>

Yes.  The tag_set we compute in get_tmt_for must be exactly what
get_alias_set returns.  We use that to determine which pointers get the
same alias set and other checks.

Why isn't get_alias_set returning 0 for types with that flag set, which would avoid anything but get_alias_set being modified?

--Dan

Follow-Ups:
- Re: Another case of DCE deleting live code
  - From: Diego Novillo

References:
- Re: Another case of DCE deleting live code
  - From: Richard Kenner
- Re: Another case of DCE deleting live code
  - From: Diego Novillo

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