RFR 8235225: Replace CHECK_0 with CHECK_NULL for non-integer returning methods

[coleen.phillimore at oracle.com]

Looks good to me.
Coleen

On 2/26/20 8:52 AM, Harold Seigel wrote:
> Hi,
>
> Please review this change to replace CHECK_0 with CHECK_NULL in 
> functions that return oops or pointers and replace CHECK_0 with 
> CHECK_false in functions that return bool.
>
> Open Webrev: 
> http://cr.openjdk.java.net/~hseigel/bug_8235225/webrev/index.html
>
> JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8235225
>
> The fix was regression tested by running Mach5 tiers 1 and 2 tests and 
> builds on Linux-x64, Solaris, Windows, and Mac OS X, by running Mach5 
> tiers 3-5 tests on Linux-x64, and JCK lang and VM tests on Linux-x64.
>
> Thanks, Harold
>