[cfe-dev] Explicit instantiation declarations/definitions and optimizations

[Richard Smith via cfe-dev]

On Sat, Sep 19, 2015 at 6:15 PM, David Blaikie via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> I was just thinking through the possible advice of encouraging users to
> use explicit template instantiation declarations/definitions to reduce
> object size.
>
> It seems this may hurt performance in non-LTO builds by causing what were
> inlinable functions to no longer be available for inlining.
>
> Should we consider emitting available_externally definitions of such
> entities (possibly under specific/higher optimization levels)?
>

We should, and we already do: http://goo.gl/V8G5kU

Do you have a case where we fail to do so? It's possible there's a bug in
this determination.
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