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  1. JDK
  2. JDK-8253048

AArch64: When CallLeaf, no need to preserve callee-saved registers in caller

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    • Subcomponent:
    • Resolved In Build:
      b18
    • CPU:
      aarch64

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        Description

        Currently all Floating-Point and SIMD Registers are defined as SOC registers in c calling convention on AArch64.
        As AArch64 ABI tells, the bottom 64 bits of v8-v15 are callee-saved.
        Aligns save-policy in c calling convention with AArch64 ABI could help eliminate unnecessary SOE registers spilling in caller across CallLeafNode.

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                Assignee:
                jzhu Joshua Zhu
                Reporter:
                jzhu Joshua Zhu
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