RFR(XS): JDK-8114853 variable tracking size limit exceeded in vmStructs.cpp

[Dmitry Samersoff]

Everybody,

Please review:

http://cr.openjdk.java.net/~dsamersoff/JDK-8114853/webrev.01/

Story:

VTA fails on huge VMStructs::init() so this method is being compiled twice.

VTA[1] allows compiler to emit DWARF-3 debugging information for local
variable ever if this variable is optimized out at the cost of
compilation time and compiler memory consumption.

So I decided to turn it off for entire hotspot build to reduce memory
footprint/increase compilation speed.

1. https://gcc.gnu.org/wiki/Var_Tracking_Assignments

-Dmitry

-- 
Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* I would love to change the world, but they won't give me the sources.