[m-rev.] diff: clean up library and compiler imports

[Julien Fischer]

On Thu, 28 Sep 2006, Julien Fischer wrote:

>
> On Wed, 27 Sep 2006, Peter Ross wrote:
>
>> On Wed, Sep 27, 2006 at 04:30:58PM +1000, Julien Fischer wrote:
>>> 
>>> On Wed, 27 Sep 2006, Peter Ross wrote:
>>> 
>>>> Hi,
>>>> 
>>>> I've been slowly fixing some of the --warn-unused-imports errors.
>>>> Rather than waiting until all have been done.  I thought I would
>>>> check-in what I've done.
>>> 
>>> This diff will break the Java and IL backends since
>>> your analysis doesn't check Mercury clauses if there are foreign clauses,
>>> e.g. some of the :- use_module rtti_implementation decls shouldn't
>>> have been deleted (the ones in construct and deconstruct).
>>> 
>> Do you know where these clauses are deleted from the HLDS?  I will have
>> to fix my analysis.
>
> From memory I think they are deleted fairly early on

>From looking at the source code they are deleted by the predicate
clauses_info_add_clause in add_clause.m.

Julien.
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