Ada, treelang needs to be converted to --enable-mapped-location

[Zack Weinberg]

Per Bothner <per@bothner.com> writes:

> I'm close to checking in patches to support --enable-mapped-location
> for Java.  At that point all of the default-enabled languages work
> more-or-less (i.e. with a small number of testsuite regressions).
> If we can fix the regressions, and there are clear benefits (e.g.
> measurable compilation-speed improvements or better errors reporting)
> we might make --enable-mapped-location the default for 4.0; if not it
> will at the very latest become the default in stage1 of 4.1.

I have run some C++ benchmarks which found a 2-3% improvement in
system time and a .5% improvement in wall time.  However, I am
completely baffled by the PCH regressions.

zw