Hello, > > The problem is that r77 is not used in it's function after this instruction > > and thus DCE deletes it. > > Don't focus on DCE. That's not the problem; the fact that there's no > visible dependence is the problem. Can you make the next instruction > have a use for r77 explicitly (CALL_INSN_FUNCTION_USAGE)?
Thanks for all the replies. I received a similar suggestion from David Edelsohn which told me to use - emit_insn (gen_rtx_USE (VOIDmode, r77)); similar to use_reg() function in expr.c; That seems to solve the problem. Thanks again, Revital
