Implemented boolean operators

src/build/core/state.go

@@ -21,8 +21,9 @@ type state struct {
 
 // counter stores how often a certain statement appeared so we can generate a unique label from it.
 type counter struct {
-	loop   int
-	branch int
+	loop      int
+	branch    int
+	subBranch int
 }
 
 // PrintInstructions shows the assembly instructions.