------- Comment #28 from bonzini at gnu dot org  2008-08-07 05:01 -------
fwprop seems the right place to do that indeed.

Only thing, I wonder you need to "find a location to add the constant": it
could be enough to do

  *x = simplify_gen_binary (PLUS, Pmode, *x, cst_to_add);

because simplify_plus_minus should have machinery to do what you are doing
already.  Indeed I wonder if this code shouldn't go in simplify_plus_minus so
that propagate_rtx would call it automatically.

Also when you compute cst_to_add you can use the _const_ version of the
simplification routine.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29256

Reply via email to