Mock out more of the addr related stuff

src/tilde_const.cpp

@@ -1,5 +1,45 @@
+gb_internal cgValue cg_const_nil(cgProcedure *p, Type *type) {
+	Type *original_type = type;
+	type = core_type(type);
+	i64 size = type_size_of(type);
+	i64 align = type_align_of(type);
+	TB_DataType dt = cg_data_type(type);
+	if (TB_IS_VOID_TYPE(dt)) {
+		TB_Module *m = p->module->mod;
+		char name[32] = {};
+		gb_snprintf(name, 31, "cnil$%u", 1+p->module->const_nil_guid.fetch_add(1));
+		TB_Global *global = tb_global_create(m, name, nullptr, TB_LINKAGE_PRIVATE);
+		tb_global_set_storage(m, tb_module_get_rdata(m), global, size, align, 0);
+
+		TB_Symbol *symbol = cast(TB_Symbol *)global;
+		TB_Node *node = tb_inst_get_symbol_address(p->func, symbol);
+		return cg_lvalue_addr(node, type);
+	}
+
+	if (is_type_internally_pointer_like(type)) {
+		return cg_value(tb_inst_ptr(p->func, 0), type);
+	} else if (is_type_integer(type) || is_type_boolean(type) || is_type_bit_set(type)) {
+		return cg_value(tb_inst_uint(p->func, dt, 0), type);
+	} else if (is_type_float(type)) {
+		switch (size) {
+		case 2:
+			return cg_value(tb_inst_uint(p->func, dt, 0), type);
+		case 4:
+			return cg_value(tb_inst_float32(p->func, 0), type);
+		case 8:
+			return cg_value(tb_inst_float64(p->func, 0), type);
+		}
+	}
+	GB_PANIC("TODO(bill): cg_const_nil %s", type_to_string(original_type));
+	return {};
+}
+
 gb_internal cgValue cg_const_value(cgProcedure *p, Type *type, ExactValue const &value) {
 	TB_Node *node = nullptr;
 
+	if (value.kind == ExactValue_Invalid) {
+		return cg_const_nil(p, type);
+	}
+
 	return cg_value(node, type);
 }