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/_spill2.ssa

@@ -0,0 +1,22 @@
+# stupid spilling test
+
+function $test() {
+@start
+	%x1  =w copy 10
+	%x2  =w add %x1, %x1
+	%x3  =w sub %x2, %x1
+	%x4  =w add %x3, %x1
+	%x5  =w sub %x4, %x1
+	%x6  =w add %x5, %x1
+	%x7  =w sub %x6, %x1
+	%x8  =w add %x7, %x1
+	%x9  =w sub %x8, %x8
+	%x10 =w add %x9, %x7
+	%x11 =w sub %x10, %x6
+	%x12 =w add %x11, %x5
+	%x13 =w sub %x12, %x4
+	%x14 =w add %x13, %x3
+	%x15 =w sub %x14, %x2
+	%x16 =w add %x15, %x1
+	ret
+}