TestPopCountVector.java test in fastdebug mode gives following assertion:
# Internal Error (/home/build/jdk-jdk/src/hotspot/cpu/arm/assembler_arm_32.hpp:1030), pid=19519, tid=19533
# assert(!VM_Version::is_initialized() || VM_Version::has_simd()) failed: simd instruction

Problem is that VM generates vcnt (Vector Count Set Bits) instruction in spite of failed check_simd check. Correct mechanism should work like the following:
1. VM_Version::initialize generates and calls short check_simd utility
2. check_simd executes vcnt instruction, vcnt produces SIGILL on machines without SIMD support
3. JVM_handle_linux_signal handles SIGILL and returns execution to the process with PC+=8 (to skip mov r0, 1)
4. check_simd returns false and makes VM_Version know that SIMD is not supported
5. VM_Version::initialize should set UsePopCountInstruction=false to disable further SIMD instructions usage