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  1. JDK
  2. JDK-8213134

AArch64: vector shift failed with MaxVectorSize=8

    Details

    • Subcomponent:
    • Resolved In Build:
      b25
    • CPU:
      aarch64
    • OS:
      linux

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        Description

        Test case:
          public static void shiftL(int[] a, int b, int[] c) {
            for (int i = 0; i < a.length; i++) {
                c[i] = (int)(a[i] << b);
            }
          }

          public static void aShiftR(int[] a, int b, int[] c) {
            for (int i = 0; i < a.length; i++) {
                c[i] = (int)(a[i] >> b);
            }
          }

          public static void shiftR(int[] a, int b, int[] c) {
            for (int i = 0; i < a.length; i++) {
                c[i] = (int)(a[i] >>> b);
            }
          }

        Java option:
        -XX:MaxVectorSize=8


        error log:
        #
        # A fatal error has been detected by the Java Runtime Environment:
        #
        # SIGSEGV (0xb) at pc=0x0000ffffae170980, pid=30399, tid=30410
        #
        # JRE version: OpenJDK Runtime Environment (12.0) (fastdebug build 12-internal+0-adhoc.yanzha01.jdksrc)
        # Java VM: OpenJDK 64-Bit Server VM (fastdebug 12-internal+0-adhoc.yanzha01.jdksrc, compiled mode, sharing, compressed oops, g1 gc, linux-aarch64)
        # Problematic frame:
        # V [libjvm.so+0x2fd980] MachNode::ideal_reg() const+0x38
        #
        # Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %d %P" (or dumping to /home/yanzha01/jdk/test/samples/java/vectorization/core.30399)
        #
        # An error report file with more information is saved as:
        # /home/yanzha01/jdk/test/samples/java/vectorization/hs_err_pid30399.log
        #
        # Compiler replay data is saved as:
        # /home/yanzha01/jdk/test/samples/java/vectorization/replay_pid30399.log
        #
        # If you would like to submit a bug report, please visit:
        # http://bugreport.java.com/bugreport/crash.jsp
        #

        Root cause:
        Current vshiftcntL/R instructions didn't support 64-bit vector.


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                • Assignee:
                  yzhang Yang Zhang
                  Reporter:
                  yzhang Yang Zhang
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                  • Created:
                    Updated:
                    Resolved: