Fix bit set size with 128-bit integers

src/check_type.cpp

@@ -948,7 +948,8 @@ void check_bit_set_type(CheckerContext *c, Type *type, Type *named_type, Ast *no
 	ast_node(bs, BitSetType, node);
 	GB_ASSERT(type->kind == Type_BitSet);
 
-	i64 const MAX_BITS = 64;
+	i64 const DEFAULT_BITS = cast(i64)(8*build_context.word_size);
+	i64 const MAX_BITS = 128;
 
 	Ast *base = unparen_expr(bs->elem);
 	if (is_ast_range(base)) {

src/types.cpp

@@ -1243,6 +1243,7 @@ Type *bit_set_to_int(Type *t) {
 	case 2:  return t_u16;
 	case 4:  return t_u32;
 	case 8:  return t_u64;
+	case 16: return t_u128;
 	}
 	GB_PANIC("Unknown bit_set size");
 	return nullptr;
@@ -2418,6 +2419,7 @@ i64 type_align_of_internal(Type *t, TypePath *path) {
 		if (bits <= 16)  return 2;
 		if (bits <= 32)  return 4;
 		if (bits <= 64)  return 8;
+		if (bits <= 128) return 16;
 		return 8; // NOTE(bill): Could be an invalid range so limit it for now
 	}
 
@@ -2669,6 +2671,7 @@ i64 type_size_of_internal(Type *t, TypePath *path) {
 		if (bits <= 16)  return 2;
 		if (bits <= 32)  return 4;
 		if (bits <= 64)  return 8;
+		if (bits <= 128) return 16;
 		return 8; // NOTE(bill): Could be an invalid range so limit it for now
 	}