[Bug target/110751] RISC-V: Suport undefined value that allows VSETVL PASS use TA/MA

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110751

--- Comment #35 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #34)
> The ELSE value of type TYPE would be constructed like
> 
>  tree var = create_tmp_var (type);
>  tree else_val = get_or_create_ssa_default_def (cfun, var);

Oh, and you recognize that at expansion by

  TREE_CODE (else_val) == SSA_NAAME
  && SSA_NAME_IS_DEFAULT_DEF (else_val)
  && VAR_P (SSA_NAME_VAR (else_val))