[whopr] Design/implementation alternatives for the driver and WPA

[Ian Lance Taylor]

[ trimming the CC list ]

Devang Patel <dpatel@apple.com> writes:

> If the optimizer can handle the symbol versioning case when one
> definition with version is defined in the same source file as the
> reference then you don't need new API.
>
> For example,
>
> a.o : refers to S and defines S at version V.
> b.o : defines S.
>
> Is inliner, at compile time allowed to inline uses of S in a.o using
> the definition it has ?

The compiler doesn't know about symbol versions.  The way they work is
that you give the symbol a name like S_V, and then use an assembly
level .symver directive to say that S_V is really S at version V.  So
false inlining doesn't really arise in a single source file, unless
you do something rather odd.

Ian