RFR (S) 8217714: [lworld] Support for substitutability checks in interpreter

[Frederic Parain]

templateTable_x86.cpp: 2478:
  - a more explicit comment explaining that the test below checks if any of the
    two arguments is null would make the code easier to understand

interpreterRuntime.cpp: 529:

Instead of 

529   if (HAS_PENDING_EXCEPTION) {
 530     fatal("isSubstitutable() raised exception");
 531   }

I would prefer

  guarantee(!HAS_PENDING_EXCEPTION,"isSubstitutable() raised exception”);

Are we sure that the substitutability test will never, ever throw an exception?

Otherwise, the changeset looks good. Thumbs up! (no need for another review).

Thank you for fixing the substitutability code in the interpreter.

Fred


> On May 27, 2019, at 10:58, David Simms <david.simms at oracle.com> wrote:
> 
> 
> Nice, thanks, updated, fix stray formatting, dropped test change
> 
> On 27/05/19 4:07 PM, Tobias Hartmann wrote:
>> Hi Mr. Simms,
>> 
>> On 27.05.19 10:17, David Simms wrote:
>>>      o Found an issue with "TestLWorld", adjust it to continue with
>>>        mode 2, (bug filed for mode 3, JDK-8224818).
>> I've fixed this test bug:
>> http://hg.openjdk.java.net/valhalla/valhalla/rev/fa2c82a95f82
>> 
>> You can therefore remove the adjustment to run with mode 2.
>> 
>> Best regards,
>> Tobias
> 
>