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Support procedures returning values

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This commit is contained in:
Eugen Wissner
2025-01-18 21:30:11 +01:00
parent a79def50e5
commit 7b36a3803f
10 changed files with 217 additions and 73 deletions
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79
gcc/elna-generic.cc
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@ -20,7 +20,7 @@ namespace gcc
this->symbol_map = symbol_table;
}
void generic_visitor::visit(source::call_statement *statement)
void generic_visitor::visit(source::call_expression *statement)
{
auto symbol = this->symbol_map->lookup(statement->name());
@ -87,7 +87,8 @@ namespace gcc
}
else if (symbol)
{
tree fndecl_type = build_function_type(void_type_node, TYPE_ARG_TYPES(symbol->payload));
tree return_type = TREE_TYPE(TREE_TYPE(symbol->payload));
tree fndecl_type = build_function_type(return_type, TYPE_ARG_TYPES(symbol->payload));
tree printf_fn = build1(ADDR_EXPR, build_pointer_type(fndecl_type), symbol->payload);
std::vector<tree> arguments(statement->arguments().size());
@ -97,10 +98,17 @@ namespace gcc
arguments[i] = this->current_expression;
}
tree stmt = build_call_array_loc(get_location(&statement->position()),
void_type_node, printf_fn, arguments.size(), arguments.data());
return_type, printf_fn, arguments.size(), arguments.data());
append_to_statement_list(stmt, &this->current_statements);
this->current_expression = NULL_TREE;
if (return_type == void_type_node)
{
append_to_statement_list(stmt, &this->current_statements);
this->current_expression = NULL_TREE;
}
else
{
this->current_expression = stmt;
}
}
else
{
@ -126,9 +134,6 @@ namespace gcc
tree resdecl = build_decl(UNKNOWN_LOCATION, RESULT_DECL, NULL_TREE, integer_type_node);
DECL_CONTEXT(resdecl) = this->main_fndecl;
DECL_RESULT(this->main_fndecl) = resdecl;
tree set_result = build2(INIT_EXPR, void_type_node, DECL_RESULT(main_fndecl),
build_int_cst_type(integer_type_node, 0));
tree return_stmt = build1(RETURN_EXPR, void_type_node, set_result);
enter_scope();
@ -140,6 +145,9 @@ namespace gcc
{
body_statement->accept(this);
}
tree set_result = build2(INIT_EXPR, void_type_node, DECL_RESULT(main_fndecl),
build_int_cst_type(integer_type_node, 0));
tree return_stmt = build1(RETURN_EXPR, void_type_node, set_result);
append_to_statement_list(return_stmt, &this->current_statements);
tree_symbol_mapping mapping = leave_scope();
@ -163,15 +171,17 @@ namespace gcc
{
parameter_types[i] = build_type(definition->parameters.at(i)->type());
}
tree declaration_type = build_function_type_array(void_type_node,
tree return_type = definition->return_type() == nullptr
? void_type_node
: build_type(*definition->return_type());
tree declaration_type = build_function_type_array(return_type,
definition->parameters.size(), parameter_types.data());
this->main_fndecl = build_fn_decl(definition->identifier().c_str(), declaration_type);
this->symbol_map->enter(definition->identifier(), source::make_info(this->main_fndecl));
if (definition->body() != nullptr)
{
tree resdecl = build_decl(UNKNOWN_LOCATION, RESULT_DECL,
NULL_TREE, TREE_TYPE(TREE_TYPE(this->main_fndecl)));
tree resdecl = build_decl(UNKNOWN_LOCATION, RESULT_DECL, NULL_TREE, return_type);
DECL_CONTEXT(resdecl) = this->main_fndecl;
DECL_RESULT(this->main_fndecl) = resdecl;
@ -454,7 +464,7 @@ namespace gcc
location_t definition_location = get_location(&definition->position());
tree definition_tree = build_decl(definition_location, TYPE_DECL,
get_identifier(definition->identifier().c_str()), tree_type);
auto result = this->symbol_map->enter(definition->identifier(), source::make_info(definition_tree));
auto result = this->symbol_map->enter(definition->identifier(), source::make_info(tree_type));
if (result)
{
@ -477,31 +487,11 @@ namespace gcc
{
if (source::basic_type_expression *basic_type = type.is_basic())
{
if (basic_type->base_name() == "Int")
{
return integer_type_node;
}
else if (basic_type->base_name() == "Bool")
{
return boolean_type_node;
}
else if (basic_type->base_name() == "Float")
{
return double_type_node;
}
else if (basic_type->base_name() == "Char")
{
return elna_char_type_node;
}
else if (basic_type->base_name() == "String")
{
return elna_string_type_node;
}
auto symbol = this->symbol_map->lookup(basic_type->base_name());
if (symbol)
if (symbol && TYPE_P(symbol->payload))
{
return TREE_TYPE(symbol->payload);
return symbol->payload;
}
error_at(get_location(&basic_type->position()),
"type '%s' not declared", basic_type->base_name().c_str());
@ -844,5 +834,26 @@ namespace gcc
this->current_expression = NULL_TREE;
}
void generic_visitor::visit(source::expression_statement *statement)
{
statement->body().accept(this);
}
void generic_visitor::visit(source::return_statement *statement)
{
source::expression *return_expression = statement->return_expression();
if (return_expression == nullptr)
{
return;
}
return_expression->accept(this);
tree set_result = build2(INIT_EXPR, void_type_node, DECL_RESULT(main_fndecl),
this->current_expression);
tree return_stmt = build1(RETURN_EXPR, void_type_node, set_result);
append_to_statement_list(return_stmt, &this->current_statements);
}
}
}