[OpenJDK 2D-Dev] [9] Review Request: 8140266 Performance loss between jdk8 and jdk9 on Maskfill

Philip Race philip.race at oracle.com
Fri Dec 23 14:49:40 UTC 2016

Looks OK to me although it is a very cryptic option so maybe include a 
that it is for performance with some versions of gcc ...


On 12/23/16, 3:15 AM, Sergey Bylokhov wrote:
> Hello.
> Please review the small fix for jdk9.
> The change add an additional gcc option to the libawt lib to improve 
> some graphics operations: 20%.
> This option is a part of -03.
>> |-fgcse-after-reload|
>>     When -fgcse-after-reload is enabled, a redundant load elimination
>>     pass is performed after reload. The purpose of this pass is to
>>     clean up redundant spilling. 
> https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
> Note that if -03 will be enabled directly via OPTIMIZATION flag then 
> the performance will not be improved.
> Bug: https://bugs.openjdk.java.net/browse/JDK-8140266
> Webrev can be found at: http://cr.openjdk.java.net/~serb/8140266/webrev.00
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