Implemented dependency tracking

src/compiler/eachFunction.go

@@ -1,37 +1,20 @@
 package compiler
 
 import (
-	"git.urbach.dev/cli/q/src/asm"
 	"git.urbach.dev/cli/q/src/core"
 )
 
-// eachFunction recursively finds all the calls to external functions.
+// eachFunction recursively finds all the calls to other functions.
 // It avoids calling the same function twice with the help of a hashmap.
 func (r *Result) eachFunction(caller *core.Function, traversed map[*core.Function]bool, call func(*core.Function)) {
 	call(caller)
 	traversed[caller] = true
 
-	for _, x := range caller.Assembler.Instructions {
-		if x.Mnemonic != asm.CALL {
+	for _, function := range caller.Dependencies {
+		if traversed[function] {
 			continue
 		}
 
-		label, isLabel := x.Data.(*asm.Label)
-
-		if !isLabel {
-			continue
-		}
-
-		callee, exists := r.Functions[label.Name]
-
-		if !exists {
-			continue
-		}
-
-		if traversed[callee] {
-			continue
-		}
-
-		r.eachFunction(callee, traversed, call)
+		r.eachFunction(function, traversed, call)
 	}
 }