AArch64: assertion failure: the int pressure is incorrect

The jtreg tests
hotspot/test/compiler/unsafe/JdkInternalMiscUnsafeAccessTestFloat.java
hotspot/test/compiler/unsafe/JdkInternalMiscUnsafeAccessTestDouble.java
failed on AArch64 with option "-Xcomp".

$ jtreg -othervm -a -ea -esa -va -ignore:quiet -timeoutFactor:8 -testjdk:./images/jdk/ -concurrency:auto -server -vmoptions:"-Xcomp" ~/Work/jdk/jdk9/gerrit/hotspot/test/compiler/unsafe/JdkInternalMiscUnsafeAccessTestFloat.java

# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/ifg.cpp:760
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/home/ninjia02/jdk/jdk9/gerrit/hotspot/src/share/vm/opto/ifg.cpp:760), pid=12233, tid=12296
# assert(int_pressure.current_pressure() == count_int_pressure(liveout)) failed: the int pressure is incorrect
#
# JRE version: OpenJDK Runtime Environment (9.0) (fastdebug build 9-internal+0-adhoc.ninjia02.gerrit)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 9-internal+0-adhoc.ninjia02.gerrit, compiled mode, compressed oops, g1 gc, linux-aarch64)
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %P" (or dumping to /home/ninjia02/jdk/jdk9/build-fastdebug/JTwork/scratch/0/core.12233)
#
# An error report file with more information is saved as:
# /home/ninjia02/jdk/jdk9/build-fastdebug/JTwork/scratch/0/hs_err_pid12233.log
#
# Compiler replay data is saved as:
# /home/ninjia02/jdk/jdk9/build-fastdebug/JTwork/scratch/0/replay_pid12233.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.java.com/bugreport/crash.jsp
#

This may be caused by incorrect reg use of get_and_setI