RFR: 8220502: Inefficient pre-sizing of PhiResolverState arrays in c1_LIRGenerator

[Tobias Hartmann]

Hi Claes,

very nice, reviewed.

Best regards,
Tobias

On 13.03.19 12:03, Claes Redestad wrote:
> Hi,
> 
> the PhiResolverState arrays are pre-sized to the maximum possible number
> of nodes that can be put into them, which when instrumenting turns out
> to be quite excessive. By not pre-sizing to the theoretical maximum I
> can measure a substantial improvements in calling methods.
> 
> Webrev: http://cr.openjdk.java.net/~redestad/8220502/open.00/
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8220502
> 
> Testing: tier1-3
> 
> On a set of startup and footprint benchmarks, 60% of collected metrics
> show 0.2-2% statistically significant improvements, with no
> regression on any metric.
> 
> Thanks!
> 
> /Claes