Seen on the vectorIntrinsics branch but should also be possible on jdk/jdk although I haven't found a reliable reproducer. Use the attached TestFloatVector.java and the following command line:

java --add-modules jdk.incubator.vector -XX:-TieredCompilation -Xcomp -XX:-UseOnStackReplacement TestFloatVector

Note the crash will only happen on vectorIntrinsics *before* the recent commit "Enable call devirtualization during post-parse phase" as this changes the inlining and hides the bug.

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x0000ffff8d7448cc, pid=225338, tid=225339
#
# JRE version: OpenJDK Runtime Environment (16.0) (fastdebug build 16-internal+0-adhoc.nicgas01.panama-vector)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 16-internal+0-adhoc.nicgas01.panama-vector, compiled mode, compressed oops, g1 gc, linux-aarch64)
# Problematic frame:
# J 3622 c2 TestFloatVector.fmaTest([F[F[F[F[Z)V (111 bytes) @ 0x0000ffff8d7448cc [0x0000ffff8d744400+0x00000000000004cc]
#