OP_MEMORY_START_PUSH 1335 regcomp.c            r = add_opcode(reg, OP_MEMORY_START_PUSH);
OP_MEMORY_START_PUSH 6206 regcomp.c        { OP_MEMORY_START_PUSH,   "mem-start-push",       ARG_MEMNUM  },
OP_MEMORY_START_PUSH 2467 regexec.c          CASE(OP_MEMORY_START_PUSH)  MOP_IN(OP_MEMORY_START_PUSH);