progress on self-hosting

Making excellent progress on self-hosting.  Today the baby irken compiler spat up its first real code:

beast:irken rushing$ self/backend

-- reader --
(((lambda (x y) x) 3 4))

-- macros --
((function lambda (x y) x) 3 4)

-- node tree --

5 call
  2 function lambda (x y)
    1 varref x
  1 literal {u1 3}
  1 literal {u1 4}

-- RTL --

0 env 2 
1 lit {u1 3}
- stor 1 1 0 0 
1 lit {u1 4}
0 stor 1 1 0 1 
1 close lambda
  0 ref 0 0 
  - ret 0
0 tail 1 0 
- ret 0

-- C output --
  r0 = allocate (TC_TUPLE, 3);
  r1 = (object *) 7;
  r0[2] = r1;
  r1 = (object *) 9;
  r0[3] = r1;
  // def lambda
  goto L0;
  FUN_lambda:
    r0 = varref (0, 0);
    PXLL_RETURN(0);
  L0:
  r1 = allocate (TC_CLOSURE, 2);
  r1[1] = &&FUN_lambda; r1 = lenv;
  r0[1] = r1[2]; lenv = r0; goto *r1;
  PXLL_RETURN(0);
#u
{total ticks: 1870544 gc ticks: 0}