The following test failed in the JDK23 CI:

compiler/c2/irTests/TestIfMinMax.java

Here's a snippet from a linux-aarch64 failure log:

----------System.err:(45/5404)*----------

Command Line:
/opt/mach5/mesos/work_dir/jib-master/install/jdk-23+17-1336/linux-aarch64-debug.jdk/jdk-23/fastdebug/bin/java -DReproduce=true -cp /opt/mach5/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S16544/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9f9dd7a9-0410-4271-aa1d-68779c1236d8/runs/6354bd54-7450-461c-bd4f-08b0dc43537b/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_compiler_1/classes/3/compiler/c2/irTests/TestIfMinMax.d:/opt/mach5/mesos/work_dir/jib-master/install/jdk-23+17-1336/src.full/open/test/hotspot/jtreg/compiler/c2/irTests:/opt/mach5/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S16544/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9f9dd7a9-0410-4271-aa1d-68779c1236d8/runs/6354bd54-7450-461c-bd4f-08b0dc43537b/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_compiler_1/classes/3/test/lib:/opt/mach5/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S16544/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9f9dd7a9-0410-4271-aa1d-68779c1236d8/runs/6354bd54-7450-461c-bd4f-08b0dc43537b/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_compiler_1/classes/3:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.3.1/1/bundles/jtreg-7.3.1+1.zip/jtreg/lib/jtreg.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.3.1/1/bundles/jtreg-7.3.1+1.zip/jtreg/lib/junit-platform-console-standalone-1.9.2.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.3.1/1/bundles/jtreg-7.3.1+1.zip/jtreg/lib/testng-7.3.0.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.3.1/1/bundles/jtreg-7.3.1+1.zip/jtreg/lib/jcommander-1.82.jar:/opt/mach5/mesos/work_dir/jib-master/install/jtreg/7.3.1/1/bundles/jtreg-7.3.1+1.zip/jtreg/lib/guice-5.1.0.jar -Djava.library.path=/opt/mach5/mesos/work_dir/jib-master/install/jdk-23+17-1336/linux-aarch64-debug.test/hotspot/jtreg/native -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MaxRAMPercentage=6.25 -Dtest.boot.jdk=/opt/mach5/mesos/work_dir/jib-master/install/jdk/21/35/bundles/linux-aarch64/jdk-21_linux-aarch64_bin.tar.gz/jdk-21 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/0db9c48f-6638-40d0-9a4b-bd9cc7533eb8-S16544/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/9f9dd7a9-0410-4271-aa1d-68779c1236d8/runs/6354bd54-7450-461c-bd4f-08b0dc43537b/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_compiler_1/tmp -ea -esa -XX:+UnlockExperimentalVMOptions -server -XX:-TieredCompilation -Dir.framework.server.port=36277 -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation -XX:CompilerDirectivesFile=test-vm-compile-commands-pid-1915292.log -XX:CompilerDirectivesLimit=241 -XX:-OmitStackTraceInFastThrow -DShouldDoIRVerification=true -XX:-BackgroundCompilation -XX:CompileCommand=quiet compiler.lib.ir_framework.test.TestVM compiler.c2.irTests.TestIfMinMax

One or more @IR rules failed:

Failed IR Rules (1) of Methods (1)
----------------------------------
1) Method "public java.lang.Object[] compiler.c2.irTests.TestIfMinMax.testMinIntReduction(int[],int[])" - [Failed IR rules: 1]:
   * @IR rule 1: "@compiler.lib.ir_framework.IR(phase={DEFAULT}, applyIfPlatformAnd={}, applyIfCPUFeatureOr={"sse4.1", "true", "asimd", "true"}, counts={"_#MIN_REDUCTION_V#_", "> 0"}, applyIfPlatform={}, applyIfPlatformOr={}, failOn={}, applyIfOr={}, applyIfCPUFeatureAnd={}, applyIf={"SuperWordReductions", "true"}, applyIfCPUFeature={}, applyIfAnd={}, applyIfNot={})"
     > Phase "PrintIdeal":
       - counts: Graph contains wrong number of nodes:
         * Constraint 1: "(\\d+(\\s){2}(MinReductionV.*)+(\\s){2}===.*)"
           - Failed comparison: [found] 0 > 0 [given]
           - No nodes matched!

>>> Check stdout for compilation output of the failed methods


  #############################################################
   - To only run the failed tests use -DTest, -DExclude,
     and/or -DScenarios.
   - To also get the standard output of the test VM run with
     -DReportStdout=true or for even more fine-grained logging
     use -DVerbose=true.
  #############################################################


compiler.lib.ir_framework.driver.irmatching.IRViolationException: There were one or multiple IR rule failures. Please check stderr for more information.
at compiler.lib.ir_framework.driver.irmatching.IRMatcher.reportFailures(IRMatcher.java:61)
at compiler.lib.ir_framework.driver.irmatching.IRMatcher.match(IRMatcher.java:49)
at compiler.lib.ir_framework.TestFramework.runTestVM(TestFramework.java:754)
at compiler.lib.ir_framework.TestFramework.start(TestFramework.java:719)
at compiler.lib.ir_framework.TestFramework.start(TestFramework.java:339)
at compiler.lib.ir_framework.TestFramework.run(TestFramework.java:223)
at compiler.lib.ir_framework.TestFramework.run(TestFramework.java:212)
at compiler.c2.irTests.TestIfMinMax.main(TestIfMinMax.java:42)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
at java.base/java.lang.Thread.run(Thread.java:1575)

JavaTest Message: Test threw exception: compiler.lib.ir_framework.driver.irmatching.IRViolationException
JavaTest Message: shutting down test

result: Failed. Execution failed: `main' threw exception: compiler.lib.ir_framework.driver.irmatching.IRViolationException: There were one or multiple IR rule failures. Please check stderr for more information.