nixify

test/_alt.ssa

@@ -0,0 +1,25 @@
+# an example with reducible control
+# flow graph that exposes poor
+# handling of looping constructs
+
+function $test() {
+@start
+	%ten =w copy 10
+	%dum =w copy 0  # dummy live-through temporary
+@loop
+	%alt =w phi @start 0, @left %alt1, @right %alt1
+	%cnt =w phi @start 100, @left %cnt, @right %cnt1
+	%alt1 =w sub 1, %alt
+	jnz %alt1, @right, @left
+@left
+	%x =w phi @loop 10, @left %x1
+	%x1 =w sub %x, 1
+	%z =w copy %x
+	jnz %z, @left, @loop
+@right
+	%cnt1 =w sub %cnt, %ten
+	jnz %cnt1, @loop, @end
+@end
+	%ret =w add %cnt, %dum
+	ret
+}