RFR JDK-8209786: gcc 7.3 compiler errors on zLinux

[Brian Burkhalter]

Hi Andrew,

It was suggested that it would be preferable to dial down the compilation settings for the fdlibm code rather than make a source code change. Was this investigated?

Thanks,

Brian

On Aug 28, 2018, at 7:18 AM, Andrew Leonard <andrew_m_leonard at uk.ibm.com> wrote:

> We have discovered issues with gcc 7.3 on zLinux, combined with OpenJDK's 
> default compiler options has highlighted a couple of native code issues, 
> with undefined behaviours:
>  - validating loop test array bounds 
>  - left shifts of negative values 
> I have created bug https://bugs.openjdk.java.net/browse/JDK-8209786
> and attached the webrev fix here: 
> http://cr.openjdk.java.net/~aleonard/8209786/webrev.00/ 
> 
> This has already been discussed and refined on the "s390x-port-dev" 
> maillist
> and as it was pointed out, it should have been posted here...
> 
> I'd like to request a sponsor for this fix please?