Re: Bootstrap failure of gcc-ss-20010409 in ia64

[Daniel Berlin <dan@cgsoftware.com>]

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Andreas Schwab <schwab@suse.de> writes:

> Daniel Berlin <dan@cgsoftware.com> writes:
> 
> |> The attached patch should actually fix it, even though i haven't been able to
> |> reproduce it on my platforms.
> 
> It does not change anything.  lookup_decl_die still returns NULL after
> gen_decl_die has been called.

It does work on the HEAD, probably due to another bugfix somewhere else.  The likely cause for not working on the
branch is that gen_decl_die isn't doing anything.

This happens if the DECL is marked to be ignored, or it's an ERROR_MARK,
or it's a CONST_DECL (an enum), etc.

In fact, diffing the HEAD dwarf2out against the branch shows me there
are only two changes in the way we generate dies, neither of which
would have any affect whatsoever on this bug.

Looking at the changelogs between the head and the branch, and based
on timing,  A random guess as to what made this start working on the
head, is a 2001-03-21 change by Jason (look at the head cp/ChangeLog) that involved changing a few
things about templates.

I can guarantee you the real bug isn't in dwarf2out (once you have the
patch installed), because if we aren't generating the decl die,
something is set wrong, somewhere.

Can you see why gen_decl_die isn't generating the die? (IE what case
it's breaking/returning on)  This should give you a large clue as to
what is wrong.

--Dan




> 
> Andreas.
> 
> -- 
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> SuSE Labs                                        completely different."
> Andreas.Schwab@suse.de
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