RFR(S): 8210676: Remove some unused Label variables

[Mikael Vidstedt]

> On Sep 13, 2018, at 6:17 PM, David Holmes <david.holmes at oracle.com> wrote:
> 
> Looks good - though the proof is in the building of course.
> 
> The debug-only use of notDouble in src/hotspot/cpu/x86/templateTable_x86.cpp seems somewhat odd.

Would you prefer to see it declared next to the other labels, but guarded with ASSERT?

Cheers,
Mikael

> 
> Thanks,
> David
> 
> On 14/09/2018 9:03 AM, Mikael Vidstedt wrote:
>> Please review this change which removes a bunch of unused Label variables. Would appreciate some help from aarch64/ppc/s390x folks to verify it!
>> bug: https://bugs.openjdk.java.net/browse/JDK-8210676
>> webrev: http://cr.openjdk.java.net/~mikael/webrevs/8210676/webrev.03/open/webrev/
>> * Background (from bug)
>> [~dholmes] noticed during the code review of JDK-8210381 that the "Label Egress" variable in macroAssembler_sparc.cpp was unused. It and other unused labels like it should be removed.
>> * About the change
>> I have *not* tried to find and remove *all* unused Label variables, because that turns out to be much harder than it might seem. I may or may not follow up on this work to remove additional unused Label variables later, but before that I’m investigating removal of other unused variables in general. Meanwhile I like to think that this is a reasonable cleanup anyway.
>> * Testing
>> tier1 build&test passes.
>> Cheers,
>> Mikael