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  1. JDK
  2. JDK-8256479

[PPC64] C2 crashes when UseVectorByteReverseInstructionsPPC64 used without SuperwordUseVSX

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 15, 16
    • Fix Version/s: 16
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b26
    • CPU:
      ppc

      Description

      C2 crashes on Power9 when using UseVectorByteReverseInstructionsPPC64 without SuperwordUseVSX.

      # SIGSEGV (0xb) at pc=0x00007fffad866adc, pid=69654, tid=69669
      #
      # JRE version: OpenJDK Runtime Environment (16.0.0.1) (slowdebug build 16.0.0.1-internal+0-adhoc.d056149.jdk)
      # Java VM: OpenJDK 64-Bit Server VM (slowdebug 16.0.0.1-internal+0-adhoc.d056149.jdk, mixed mode, compressed oops, g1 gc, linux-ppc64le)
      # Problematic frame:
      # V [libjvm.so+0x2b6adc] Type::ideal_reg() const+0x1c

      V [libjvm.so+0x2b6adc] Type::ideal_reg() const+0x1c
      C 0x00007fff6cf9a0d0
      V [libjvm.so+0x11537ac] Node::is_iteratively_computed()+0x44
      V [libjvm.so+0xf57790] PhaseCFG::schedule_local(Block*, GrowableArray<int>&, VectorSet&, long*)+0xaf4
      V [libjvm.so+0xb3aacc] PhaseCFG::global_code_motion()+0x7d0
      V [libjvm.so+0xb3ae2c] PhaseCFG::do_global_code_motion()+0x7c
      V [libjvm.so+0x7e21cc] Compile::Code_Gen()+0x1a4
      V [libjvm.so+0x7d7560] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, DirectiveSet*)+0x169c

      m is a MachTempNode in PhaseCFG::schedule_local. Out edge leads to bytes_reverse_long_vecNode which uses vecX temp operand which can only be used with SuperwordUseVSX.

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              Assignee:
              mdoerr Martin Doerr
              Reporter:
              mdoerr Martin Doerr
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                Dates

                Created:
                Updated:
                Resolved: