Add static global variables

chibi.h

@@ -73,6 +73,7 @@ struct Var {
   int offset;    // Offset from RBP
 
   // Global variable
+  bool is_static;
   Initializer *initializer;
 };
 

codegen.c

@@ -524,6 +524,10 @@ static void gen(Node *node) {
 }
 
 static void emit_data(Program *prog) {
+  for (VarList *vl = prog->globals; vl; vl = vl->next)
+    if (!vl->var->is_static)
+      printf(".global %s\n", vl->var->name);
+
   printf(".bss\n");
 
   for (VarList *vl = prog->globals; vl; vl = vl->next) {

parse.c

@@ -136,8 +136,9 @@ static Var *new_lvar(char *name, Type *ty) {
   return var;
 }
 
-static Var *new_gvar(char *name, Type *ty, bool emit) {
+static Var *new_gvar(char *name, Type *ty, bool is_static, bool emit) {
   Var *var = new_var(name, ty, false);
+  var->is_static = is_static;
   push_scope(name)->var = var;
 
   if (emit) {
@@ -641,7 +642,7 @@ static Function *function(void) {
   ty = declarator(ty, &name);
 
   // Add a function type to the scope
-  new_gvar(name, func_type(ty), false);
+  new_gvar(name, func_type(ty), false, false);
 
   // Construct a function object
   Function *fn = calloc(1, sizeof(Function));
@@ -861,7 +862,7 @@ static void global_var(void) {
     return;
   }
 
-  Var *var = new_gvar(name, ty, sclass != EXTERN);
+  Var *var = new_gvar(name, ty, sclass == STATIC, sclass != EXTERN);
 
   if (sclass == EXTERN) {
     expect(";");
@@ -1077,7 +1078,7 @@ static Node *declaration(void) {
 
   if (sclass == STATIC) {
     // static local variable
-    Var *var = new_gvar(new_label(), ty, true);
+    Var *var = new_gvar(new_label(), ty, true, true);
     push_scope(name)->var = var;
 
     if (consume("="))
@@ -1706,7 +1707,7 @@ static Node *compound_literal(void) {
   }
 
   if (scope_depth == 0) {
-    Var *var = new_gvar(new_label(), ty, true);
+    Var *var = new_gvar(new_label(), ty, true, true);
     var->initializer = gvar_initializer(ty);
     return new_var_node(var, tok);
   }
@@ -1836,7 +1837,7 @@ static Node *primary(void) {
     token = token->next;
 
     Type *ty = array_of(char_type, tok->cont_len);
-    Var *var = new_gvar(new_label(), ty, true);
+    Var *var = new_gvar(new_label(), ty, true, true);
     var->initializer = gvar_init_string(tok->contents, tok->cont_len);
     return new_var_node(var, tok);
   }

tests

@@ -60,6 +60,7 @@ Tree *tree = &(Tree){
 
 extern int ext1;
 extern int *ext2;
+static int ext3 = 3;
 
 int;
 struct {char a; int b;};
@@ -684,6 +685,8 @@ int main() {
 
   ret_none();
 
+  assert(3, ext3, "ext3");
+
   printf("OK\n");
   return 0;
 }