Value type array optimizations/fixes with C2

[David Simms]

I can't answer for the JIT parts, but the rest of it looks good !


On 13/02/17 17:39, Tobias Hartmann wrote:
> Hi,
>
> http://cr.openjdk.java.net/~thartmann/valhalla/vt_prototype/webrev.07/
>
> please review this change which includes:
> - Fixed wrong return value in AddPNode::Value()
> - Basic version of ValueArrayKlass::oop_print_on() for debugging
> - Fixed escape analysis to keep track of the field being accessed in VT arrays
> - Re-enabled asserts in graphKit.cpp and memnode.cpp
> - Implemented scalar replacement for flattened value type arrays
> - Implemented re-allocation of scalar replaced value type arrays on deoptimization
> - Refactored valuetypenode.cpp and related code
> - Refactored test bench to use flags from jtreg command line instead of hard-coding command line options
> - Enabled/added corresponding regression tests and match rules
>
> There are still some problems with incremental inlining. I disabled the flag for testing and will work on fixing this next.
>
> Thanks,
> Tobias