------- Comment #8 from law at redhat dot com 2006-03-24 14:56 -------
Subject: Re: [4.2 Regression] escaping global
variables cause 'definition follows use' error.
On Fri, 2006-03-24 at 14:49 +0000, dberlin at gcc dot gnu dot org wrote:
>
> ------- Comment #6 from dberlin at gcc dot gnu dot org 2006-03-24 14:49
> -------
> The only reason i can think that this would occur is if the copies had
> different SMT's or NMT's associated with them, but that shouldn't happen,
> since
> they are copies :)
The problem here is the set of virtual operands changes as a result
of propagating an invariant ADDR_EXPR into a use site. What's odd
is the code should be mimicking how other passes already deal with
this issue.
For reasons I don't understand yet, we haven't marked those virtual
operands which are removed from the use site for renaming. I'll be
working on this today.
jeff
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26840
