RFR(S): 8139421: PPC64LE: MacroAssembler::bxx64_patchable kills register R12

[Doerr, Martin]

Hi,


PPC64LE has a different implementation for bxx64_patchable which kills Register R12.

However, register R12 must be preserved for stub calls. It is used to call the deopt handler for example.



Webrev is here:

http://cr.openjdk.java.net/~mdoerr/8139421_PPC64LE_R12/webrev.00



Please review this change.  I need a sponsor, please.


Best regards,
  Martin

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