On fastdebug ARM32 build I see several assertion errors after JDK-8303238. The case doesn't seem dangerous, just an extra (x >> 0) operation.

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/ws/workspace/jdk-dev-nightly/label/linux-arm/type/b11/jdk/src/hotspot/share/opto/mulnode.cpp:903), pid=28935, tid=28950
# assert(con < add1Con) failed: must be (1 < 1)
#
# JRE version: OpenJDK Runtime Environment (21.0) (fastdebug build 21-commitcd41c69d-adhoc.re.jdk)
# Java VM: OpenJDK Server VM (fastdebug 21-commitcd41c69d-adhoc.re.jdk, mixed mode, g1 gc, linux-arm)
# Problematic frame:
# V [libjvm.so+0x1006b08] LShiftINode::Ideal(PhaseGVN*, bool)+0x834
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %d %P %E" (or dumping to /ws/workspace/jdk-dev-nightly-jtreg/label/linux-arm/suite/jdk-tier1/type/t11/out_jdk/work/scratch/core.28935)
#
# An error report file with more information is saved as:
# /ws/workspace/jdk-dev-nightly-jtreg/label/linux-arm/suite/jdk-tier1/type/t11/out_jdk/work/scratch/hs_err_pid28935.log
#
# Compiler replay data is saved as:
# /ws/workspace/jdk-dev-nightly-jtreg/label/linux-arm/suite/jdk-tier1/type/t11/out_jdk/work/scratch/replay_pid28935.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

java/lang/String/Indent.java
java/lang/constant/MethodTypeDescTest.java
java/lang/invoke/RevealDirectTest.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeBoolean.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeByte.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeChar.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeDouble.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeFloat.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeInt.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeLong.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeShort.java
java/lang/invoke/VarHandles/VarHandleTestMethodTypeString.java
java/lang/reflect/PublicMethods/PublicMethodsTest.java