ObjC tree inlining

[Neil Booth]

Alexandre Oliva wrote:-

> Yup.  I made it conditional in C because doing tree inlining would
> mean we wouldn't be instrumenting inlined functions, because we only
> instrument them as trees, only as RTL.  The same test should probably
> be done in C++, or we should instrument functions as trees.  The
> latter is definitely preferable, since we're phasing out RTL inlining.

OK.  For the moment, I'll move it to c-common.c unless I hear an
objection.

Neil.