test2

Author: fuhsnn

codegen.c

@@ -5278,10 +5278,14 @@ static void peep_redunt_jmp(char *p) {
   }
 }
 
-static void mark_alias_live(char *name) {
-  Obj *alias = get_symbol_var(name);
-  if (alias)
-    mark_live(alias);
+static void mark_alias_live(Obj *var) {
+  if (var->is_live)
+    return;
+  if (var->alias_name) {
+    Obj *alias = get_symbol_var(var->alias_name);
+    if (alias)
+      mark_live(alias);
+  }
 }
 
 static void mark_live(Obj *var) {
@@ -5290,8 +5294,7 @@ static void mark_live(Obj *var) {
   var->is_live = true;
 
   if (!var->is_definition) {
-    if (var->alias_name)
-      mark_alias_live(var->alias_name);
+    mark_alias_live(var);
     return;
   }
   if (var->ty->kind == TY_FUNC) {
@@ -5331,12 +5334,13 @@ int codegen(Obj *prog, FILE *out) {
 
   for (Obj *var = prog; var; var = var->next) {
     if (!var->is_static || var->is_used) {
-      if (var->alias_name)
-        mark_alias_live(var->alias_name);
-      else if (var->is_definition)
+      if (!var->is_definition)
+        mark_alias_live(var);
+      else
         mark_live(var);
     }
   }
+
   for (Obj *var = prog; var; var = var->next) {
     if (!var->is_definition) {
       if (((!var->is_static || var->is_used) && var->alias_name) ||