RFR(L): 8212245 Remove Thread-Local Value Buffer

[Tobias Hartmann]

Hi Frederic,

this looks good to me, thanks for also removing the C2 code.

I think you missed to remove the corresponding tests and also the flag usages. For example:

test/hotspot/jtreg/runtime/valhalla/valuetypes/VTBufferTest.java: * @run main/othervm -Xint
-XX:+EnableValhalla -XX:ValueTypesBufferMaxMemory=0 VTBufferTest generate-and-run

test/hotspot/jtreg/compiler/valhalla/valuetypes/TestCallingConvention.java:        case 1: return
new String[] {"-XX:ValueTypesBufferMaxMemory=0"};

Best regards,
Tobias

On 16.10.2018 21:42, Frederic Parain wrote:
> Please review this large but simple patch removing the Thread-Local Value Buffer.
> This buffer used by the interpreter didn’t demonstrate performance improvements
> and it causes complexity in the JIT code.
> 
> CR: https://bugs.openjdk.java.net/browse/JDK-8212245
> Webrev: http://cr.openjdk.java.net/~fparain/8212245/webrev.00/index.html
> 
> Testing: hotspot_jtreg:hotspot_valhalla on Linux/Mac/Windows.
> 
> Thank you,
> 
> Fred
>