There is a bug in macro assembler in vinserti128 special handling for platforms like KNL that do not support AVX512VL.
 
The following:
   void vinserti128(XMMRegister dst, XMMRegister nds, XMMRegister src, uint8_t imm8) {
     if (UseAVX > 2 && VM_Version::supports_avx512novl()) {
       Assembler::vinserti32x4(dst, dst, src, imm8);
     }
     ...
  }
 
Should have been:
   void vinserti128(XMMRegister dst, XMMRegister nds, XMMRegister src, uint8_t imm8) {
     if (UseAVX > 2 && VM_Version::supports_avx512novl()) {
       Assembler::vinserti32x4(dst, nds, src, imm8);
     }
    ...
  }