RFR(XS) : 8195729 : compiler.aot.AotCompiler should be run as a driver

[Igor Ignatyev]

if -Xcomp is specified, the execution of compiler.aot.AotCompiler takes 5 seconds less than w/o patch.

-- Igor

> On Jan 18, 2018, at 3:04 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> Good.
> 
> Again, what time improvement you see?
> 
> Thanks,
> Vladimir
> 
> On 1/18/18 3:00 PM, Igor Ignatyev wrote:
>> http://cr.openjdk.java.net/~iignatyev//8195729/webrev.00
>>> 37 lines changed: 0 ins; 0 del; 37 mod;
>> Hi all,
>> could you please review this small fix which replaces all execution of c.a.AotCompiler to driver mode execution?
>> this class spawns a new JVM to run jaotc tool, hence there is no need to run it by JVM under test and w/ external vm flags.
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8195729
>> webrev: http://cr.openjdk.java.net/~iignatyev//8195729/webrev.00
>> testing: compiler/aot/ tests
>> Thanks,
>> -- Igor