-finline-functions does not affect libstdc++?

[Chris Lattner]

Richard Guenther wrote:
> It seems specifying -finline-functions with gcc3.4 does not affect
> libstdc++ declarations!? I figured this out while doing work on
> attribute((leafify)). Is this intentional? At least it hurts performance
> quite a bit!

This is because almost all of libstdc++ is specified in terms of
"external" templates.  For example, ostream and istream all use external
templates, so the compiler does not instantiate them except when building
libstdc++.  Presumably this is a performance optimization of the compiler
itself, rather than of the code.

Link-time inlining/optimization obviously fixes this problem.  :)

-Chris

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