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  1. JDK
  2. JDK-8233948

AArch64: Incorrect mapping between OptoReg and VMReg for high 64 bits of Vector Register

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    • Subcomponent:
    • Resolved In Build:
      b27
    • CPU:
      aarch64
    • OS:
      linux

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        Description

        In register definition of aarch64.ad, each vector register is defined as 4 slots with its calling convention, ideal type, ... and its VMReg value. These VMReg values in reg_def are used by ADLC to generate mapping between OptoReg and VMReg: opto2vm[].

        But VMReg is treated as 2 slots inconsistently for vector register. This causes incorrect mapping between VMReg and OptoReg for high 64 bits of vector register.

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                Assignee:
                jzhu Joshua Zhu
                Reporter:
                jzhu Joshua Zhu
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                  Created:
                  Updated:
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