made 'int64_t __extract_element(const __vec16_i64 &v, uint32_t index)' function 'ispc_knc_backend.h like'
add 'void __masked_store_i64(void *p, const __vec16_i64 &v, __vec16_i1 mask)' function. now 450 compfails and 12 runfails
remove 'fail_db.txt' from '.gitignore'