Re: inline (Was: Bloat)

[David Brownlee <abs%NetBSD.org@localhost>]

On Sun, 25 Jan 2009, Andrew Doran wrote:

> - Removing most of the inline functions from the x86 headers for pcc and for
>  modules reduced the size of the amd64 kernel by about 150kB because the
>  compiler is stupid. Most of those did something extremely slow and had no
>  business being inlines. It's likely there are other instances of this to
>  be found.

        Would there be any sense in letting gcc pick when to inline?
        Gcc has -finline-functions -finline-limit=N which will
        inline any function less than N pseudo instructions. Picking
        a small enough value of N should automatically inline all
        trivial accessors, and any other function small enough to
        benefit. (The default is 600 which is probably too high
        for the kernel).

        -finline-functions-called-once may also be of interest...

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