Implemented if statements

src/build/core/Function.go

@@ -45,7 +45,7 @@ func NewFunction(name string, file *fs.File, body token.List) *Function {
 // Compile turns a function into machine code.
 func (f *Function) Compile() {
 	defer close(f.finished)
-	f.assembler.Label(f.Name)
+	f.assembler.Label(asm.LABEL, f.Name)
 	f.err = f.CompileTokens(f.Body)
 	f.assembler.Return()
 }
@@ -90,6 +90,9 @@ func (f *Function) CompileASTNode(node ast.Node) error {
 	case *ast.Return:
 		return f.CompileReturn(node)
 
+	case *ast.If:
+		return f.CompileIf(node)
+
 	case *ast.Loop:
 		return f.CompileLoop(node)