Question about simplify_rtx ()

[Paolo Bonzini]

> You showed me that it might be dangerous to replace rtx on the LHS
> of a SET using simplify_replace_rtx ().
> simplify_rtx () seems safer, is there a good reason why it doesn't
> work with INSNs and SETs?

Because it works with expressions. :-)

> Will a generalized function called simplify_insn () that uses 
> simplify_rtx () be accepted?

I am no authority, but I think so.

Paolo