testbed is now functional

I would like to make sure some _ tests are
passing, however I have to think of a nice
way to grab debug output and compare it
nicely.  Some require NReg == 3, that is a
pain in the ass.  Maybe they can be changed
to work for the full register set.

lisc/test/_live.ssa

@@ -0,0 +1,21 @@
+# this control flow graph is irreducible
+# yet, we expecet the liveness analysis
+# to work properly and make %x live in
+# the block @left
+#
+# nothing should ever be live at the entry
+
+function $test() {
+@start
+	%b =w copy 0
+	%x =w copy 10
+	jnz 0, @loop, @left
+@left
+	jmp @inloop
+@loop
+	%x1 =w add %x, 1
+@inloop
+	%b1 =w add %b, 1
+@endloop
+	jmp @loop
+}