[Issue]
HotSpot crashes after a Graal-compiled synchronized method is deoptimized and then returned in interpreter. This happens only on AArch64.

[Reproduce]
This can be reproduced by below Java program with VM options
"-XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI -XX:+UseJVMCICompiler -Djvmci.Compiler=graal".

public class Test {
  public static synchronized int hash(Object o) { return o.hashCode(); }
  public static void main(String[] args) throws Exception {
    int sum = 0;
    for (int i = 0; i < 30000; i++) {
      sum += hash(i);
      Thread.sleep(1);
    }
    sum += hash("Shanghai");
    System.out.println(sum);
  }
}

$ javac Test.java
$
$ java -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI -XX:+UseJVMCICompiler -Djvmci.Compiler=graal Test
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGBUS (0x7) at pc=0x0000ffff8f93b9b4, pid=12666, tid=12667
#
# JRE version: OpenJDK Runtime Environment (12.0) (build 12-internal+0-adhoc.penli01.jdksrc)
# Java VM: OpenJDK 64-Bit Server VM (12-internal+0-adhoc.penli01.jdksrc, mixed mode, sharing, tiered, jvmci, jvmci compiler, compressed oops, g1 gc, linux-aarch64)
# Problematic frame:
# j Test.hash(Ljava/lang/Object;)I+4
#
# 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/penli01/core.12666)
#
# An error report file with more information is saved as:
# /home/penli01/hs_err_pid12666.log
Loaded disassembler from /usr/lib/jvm/jdk-12/lib/hsdis-aarch64.so
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#
Aborted (core dumped)

--------------- S U M M A R Y ------------

Command Line: -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI -XX:+UseJVMCICompiler -Djvmci.Compiler=graal Test

Host: AArch64, 224 cores, 125G, Ubuntu 18.04.2 LTS
Time: Fri Jul 26 01:21:31 2019 UTC elapsed time: 32 seconds (0d 0h 0m 32s)

--------------- T H R E A D ---------------

Current thread (0x0000ffffac011000): JavaThread "main" [_thread_in_Java, id=12667, stack(0x0000ffffb1e5a000,0x0000ffffb205a000)]

Stack: [0x0000ffffb1e5a000,0x0000ffffb205a000], sp=0x0000ffffb2058310, free space=2040k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
j Test.hash(Ljava/lang/Object;)I+4
j Test.main([Ljava/lang/String;)V+34
v ~StubRoutines::call_stub
V [libjvm.so+0x6ee4d4] JavaCalls::call_helper(JavaValue*, methodHandle const&, JavaCallArguments*, Thread*)+0x364
V [libjvm.so+0x76ff58] jni_invoke_static(JNIEnv_*, JavaValue*, _jobject*, JNICallType, _jmethodID*, JNI_ArgumentPusher*, Thread*) [clone .isra.67] [clone .constprop.192]+0x280
V [libjvm.so+0x772544] jni_CallStaticVoidMethod+0x12c
C [libjli.so+0x5974] JavaMain+0xe84
C [libpthread.so.0+0x7088] start_thread+0xb0


siginfo: si_signo: 7 (SIGBUS), si_code: 1 (BUS_ADRALN), si_addr: 0x00000000d74e312b