protect label from being optimized

[Kunal Parmar]

Hi,

 >> I am working on porting GCC to a new RISC architecture. The ISA does
 >> not have a "Jump and Link Register" instruction. So I am simulating
 >> one by replacing
 >>          jal [reg]
 >> by
 >>          load ra, Lret
 >>          jr reg
 >> Lret:
 >>
 >> in RTL.
 >> But my return label is getting optimized away. Could you please tell
 >> me how to avoid this.
 >
 >Make sure the load label instruction is using a LABEL_REF.  Look at
 > sh.md for various examples.

Is this correct :
        ret_label = gen_label_rtx ();
        emit_move_insn (gen_rtx_REG (HImode, 7),
                                    gen_rtx_LABEL_REF (VOIDmode, 
ret_label));
        emit_call_insn (gen_brc_call_simulate (addr, args_size));
        emit_label (ret_label);

Cheers,
Kunal