This was initially thought to be the same issue as JDK-8373251, but it turns out it is a separate issue.

The attached Java Fuzzer test fails due to missing optimization opportunities with AddL and URShiftL:

java -XX:CompileCommand="compileonly,*Test2*::*" -XX:-TieredCompilation -Xbatch -XX:PerMethodTrapLimit=0 -XX:VerifyIterativeGVN=1110 Test2.java

Missed Ideal optimization (can_reshape=false):
The node was replaced by Ideal.
Old node:
dist dump
---------------------------------------------
   1 26 ConI === 0 [[ 329 467 84 ]] #int:1
   1 468 AddL === _ 84 84 [[ 467 ]] !orig=410,231 !jvms: Test2::lMeth1 @ bci:164 (line 46)
   0 467 URShiftL === _ 468 26 [[ 466 466 ]] !orig=409,236,[440] !jvms: Test2::lMeth1 @ bci:173 (line 47)
The result after Ideal:
dist dump
---------------------------------------------
   1 512 ConL === 0 [[ 513 515 ]] #long:maxlong
   1 514 AddL === _ 382 513 [[ 515 ]]
   0 515 AndL === _ 514 512 [[ ]]

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/home/bmaillar/src/jdk/JDK-8371536/open/src/hotspot/share/opto/phaseX.cpp:1885), pid=2209995, tid=2210004
# assert(false) failed: Missed Ideal optimization opportunity in PhaseIterGVN for URShiftL
#
# JRE version: Java(TM) SE Runtime Environment (27.0) (fastdebug build 27-internal-bmaillar.open)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 27-internal-bmaillar.open, mixed mode, compressed oops, compressed class ptrs, serial gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x18a258c] PhaseIterGVN::verify_Ideal_for(Node*, bool)+0x65c
#
# Core dump will be written. Default location: Determined by the following: "/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %d" (alternatively, falling back to /home/bmaillar/src/jdk/JDK-8373251/core.2209995)
#
# An error report file with more information is saved as:
# /home/bmaillar/src/jdk/JDK-8373251/hs_err_pid2209995.log
#
# Compiler replay data is saved as:
# /home/bmaillar/src/jdk/JDK-8373251/replay_pid2209995.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#