[9] RFR(S) 8171187: Expected compilation level after compilation to be no less than 1

[Vladimir Kozlov]

Thank you, Igor

Vladimir

On 12/13/16 5:52 PM, Igor Veresov wrote:
> Looks good.
>
> igor
>
>> On Dec 13, 2016, at 5:22 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
>>
>> http://cr.openjdk.java.net/~kvn/8171187/webrev/
>> https://bugs.openjdk.java.net/browse/JDK-8171187
>>
>> compiler/aot/RecompilationTest.java fails with
>>
>> java.lang.RuntimeException: METHOD_TEST: expected compilation level after compilation to be no less than 1 for METHOD_TEST: expected -1 >= 1
>>
>> The AOT method SimpleTestCaseHelper.method() is not recompiled sometimes.
>>
>> The main cause is that this method is very trivial ( int method() { return 42; } )
>> and it is inlined into other AOT methods which are executed during run.
>>
>> An other cause it profiling event is triggered using 'rdtsc; test $0xff,%eax;' instructions. Which may not jump during 256 invocations.
>>
>> These changes only fix inlining issue by adding -XX:CompileCommand=dontinline flag to AOT compilation commands.
>>
>> I added missing -UseCompressedOops flags which I did not add in JDK-8171134 fix.
>> I added suffix to AOT libraries names to keep both in case of debugging.
>> And I replaced -XX:CompileCommand=dontinline,*.* with -XX:-Inline for java execution commands. I verified that test methods are not inlined during recompilation.
>>
>> Thanks,
>> Vladimir
>