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  1. JDK
  2. JDK-8217909

Make unused r12 register (without compressed oops) available to regalloc in C2

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    • b09
    • x86_64
    • generic

      When running with compressed oops, the r12 register holds the heapbase, and thus is not available to register allocation in C2. However, when *not* running with compressed oops, it is still not available and remains unused. It should be made available to register allocation in this case.

        1.
        		 Release Note: More Registers Available When Running Without Compressed References on x86_64 Sub-task Closed Aleksey Shipilev  

            rkennke Roman Kennke
            rkennke Roman Kennke
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