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Re: [lto] Reader-writer compatibility?

From: Ryan Mansfield <rmansfield at qnx dot com>
To: Diego Novillo <dnovillo at google dot com>
Cc: gcc at gcc dot gnu dot org
Date: Tue, 01 Sep 2009 13:45:20 -0400
Subject: Re: [lto] Reader-writer compatibility?
References: <4A9D40C8.7080000@qnx.com> <b798aad50909010843n574c5f9co402679dbe92e1f13@mail.gmail.com>
Reply-to: rmansfield at qnx dot com

Diego Novillo wrote:

On Tue, Sep 1, 2009 at 11:42, Ryan Mansfield<rmansfield@qnx.com> wrote:

Is it required that the same compiler that generated lto objects be used to
read them? I've come across a couple ICEs with the current revision reading
lto objects created by a slightly older version  but same configuration. Is
this simply invalid usage of my part?


It's likely.  How much drift between the two revisions?  Can you
recreate the ICE if you write and read with the exact same revision?
If so, please file a bug.


The objects were created with rev 151111 and being read using 151271.
No, I can't reproduce the ICE using the same version.

Thanks for confirming this is not expected to work.

Regards,

Ryan Mansfield

Follow-Ups:
- Re: [lto] Reader-writer compatibility?
  - From: Frank Ch. Eigler

References:
- [lto] Reader-writer compatibility?
  - From: Ryan Mansfield
- Re: [lto] Reader-writer compatibility?
  - From: Diego Novillo

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