RFR (M): 8030863: PPC64: (part 220): ConstantTableBase for calls between args and jvms

Vladimir Kozlov vladimir.kozlov at oracle.com
Mon Dec 23 14:40:04 PST 2013

JPRT test job passed with these changes.


On 12/23/13 12:00 PM, Vladimir Kozlov wrote:
> Goetz,
> Can you explain the problem in details? When you say 'during expand' do
> you mean 'during postalloc_expand'? Because normal expand happens during
> matching. And I did not get how it is related to derived/base pairs.
> Thanks,
> Vladimir
> On 12/20/13 7:20 AM, Lindenmaier, Goetz wrote:
>> Hi,
>> The change "8028580: PPC64 (part 114/120): Support for Call nodes with
>> constants. "
>> adds MachConstantBase node for Calls at req()-1 during
>> expand. Register allocation adds the derived/base pairs and then
>> uses the wrong register maps for allocation, because the MachConstantBase
>> node is no more at req()-1
>> Now add the edge in the matcher when the node is complete. Add it
>> after parameters and before jvms. Adapt jvms offsets. Also assure
>> jvms is always cloned, else the offset gets wrong.
>> So far, $constanttablebase is only used in Calls on PPC, so this has
>> no effect on
>> other platforms.
>> Please review and test this change.
>> http://cr.openjdk.java.net/~goetz/webrevs/8030863-0-call/
>> Best regards,
>>    Goetz.

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