RFR: 8209459: TestSHA512MultiBlockIntrinsics failed on AArch64

[Vladimir Kozlov]

Looks good.

Thanks,
Vladimir

On 8/14/18 12:35 AM, Joshua Zhu wrote:
> Hi,
> 
> Please help review the following change.
> Bug: https://bugs.openjdk.java.net/browse/JDK-8209459
> Webrev: http://cr.openjdk.java.net/~zyao/8209459/webrev.00
> It has passed "compiler/intrinsics/sha" jtreg testing for Graal and C2.
> 
> The jtreg TestSHA512MultiBlockIntrinsics failed on aarch64 since commit http://hg.openjdk.java.net/jdk/jdk/rev/2a12ff1fff68
> The failed case expected "<intrinsic id='_digestBase_implCompressMB'" not to appear in compilation logs with "+XX:+LogCompilation"
> because "-XX:+UseSHA512Intrinsics" is not supported on aarch64.
> http://hg.openjdk.java.net/jdk/jdk/file/e810abb27deb/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp#l354
> 
> But _digestBase_implCompressMB intrinsic has three stub routines.
> http://hg.openjdk.java.net/jdk/jdk/file/e810abb27deb/src/hotspot/share/opto/library_call.cpp#l6190
> Generation of any one among three stub routines will cause "<intrinsic id='_digestBase_implCompressMB'" printed in log.
> http://hg.openjdk.java.net/jdk/jdk/file/e810abb27deb/src/hotspot/share/opto/library_call.cpp#l406
> 
> Which ones are generated for intrinsic _digestBase_implCompressMB is related with:
>      jvm option (e.g. UseSHA512Intrinsics)
>      cpu feature
>      loaded class (e.g. if SHA5.class is not loaded, no need to generate the corresponding stub routine: sha512_implCompressMB)
>      http://hg.openjdk.java.net/jdk/jdk/file/e810abb27deb/src/hotspot/share/opto/library_call.cpp#l6326
>      speculative type (if object has speculative type, only stub routine for the speculative type will be generated as fast path)
>      http://hg.openjdk.java.net/jdk/jdk/file/e810abb27deb/src/hotspot/share/opto/library_call.cpp#l6334
> 
> The pseudo code is:
> if (digestBaseObj instanceof SHA/SHA2/SHA5)
>      do_intrinsic
> else
>      do_javapath
> 
> The commit http://hg.openjdk.java.net/jdk/jdk/rev/2a12ff1fff68 caused load of all three SHA, SHA2 and SHA5 classes.
> 
> Best Regards,
> Joshua
>