RFR 8152295: Redundant CLCs for classes resolved in both loaders

[Lois Foltan]

Looks good.  Minor nit, the two if statements on line #192 could be 
collapsed into one, something like "if (klass1 == klass2 && klass1 != NULL)"
Lois

On 5/16/2017 1:10 PM, harold seigel wrote:
> Hi,
>
> Please review this JDK-10 change to not record loader constraints if 
> both class loader classes are the same.  This change reduces the 
> number of recorded loader constraints when running the Queens program 
> from six to four.  It reduces the number of recorded loader 
> constraints when running javac to compile Queens.java from 110 to 55.
>
> Additionally, the logging code for LaderConstraintTable::add_entry() 
> was restructured to simplify things and improve readability.
>
> Open Webrev: http://cr.openjdk.java.net/~hseigel/bug_8152295/webrev/
>
> JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8152295
>
> The fix was tested with JCK Lang and VM tests, the JTreg hotspot, 
> java/io, java/lang, java/util and other tests, the co-located NSK 
> tests, RBT tests, and with JPRT.
>
> Thanks, Harold
>