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Corrected handling of nested typedefs of struct/union

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This also corrects shadowing of constants in struct/union types.
This commit is contained in:
Dag Lem 2023-01-29 20:22:00 +01:00 • committed by Zachary Snow
parent 0b8f728590
commit cff53d6d87
4 changed files with 81 additions and 52 deletions
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58
frontends/ast/simplify.cc
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@ -1380,6 +1380,60 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
break;
case AST_STRUCT_ITEM:
if (is_custom_type) {
log_assert(children.size() == 1);
log_assert(children[0]->type == AST_WIRETYPE);
auto type_name = children[0]->str;
if (!current_scope.count(type_name)) {
log_file_error(filename, location.first_line, "Unknown identifier `%s' used as type name\n", type_name.c_str());
}
AstNode *resolved_type_node = current_scope.at(type_name);
if (resolved_type_node->type != AST_TYPEDEF)
log_file_error(filename, location.first_line, "`%s' does not name a type\n", type_name.c_str());
log_assert(resolved_type_node->children.size() == 1);
AstNode *template_node = resolved_type_node->children[0];
// Ensure typedef itself is fully simplified
while (template_node->simplify(const_fold, at_zero, in_lvalue, stage, width_hint, sign_hint, in_param)) {};
// Remove type reference
delete children[0];
children.pop_back();
switch (template_node->type) {
case AST_WIRE:
type = AST_STRUCT_ITEM;
break;
case AST_STRUCT:
case AST_UNION:
type = template_node->type;
break;
default:
log_file_error(filename, location.first_line, "Invalid type for struct member: %s", type2str(template_node->type).c_str());
}
is_reg = template_node->is_reg;
is_logic = template_node->is_logic;
is_signed = template_node->is_signed;
is_string = template_node->is_string;
is_custom_type = template_node->is_custom_type;
range_valid = template_node->range_valid;
range_swapped = template_node->range_swapped;
range_left = template_node->range_left;
range_right = template_node->range_right;
attributes[ID::wiretype] = mkconst_str(resolved_type_node->str);
// Copy clones of children from template
for (auto template_child : template_node->children) {
children.push_back(template_child->clone());
}
did_something = true;
}
log_assert(!is_custom_type);
break;
case AST_ENUM:
@ -1793,8 +1847,8 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
// Ensure typedef itself is fully simplified
while (template_node->simplify(const_fold, at_zero, in_lvalue, stage, width_hint, sign_hint, in_param)) {};
if (template_node->type == AST_STRUCT || template_node->type == AST_UNION) {
// replace with wire representing the packed structure
if (!str.empty() && str[0] == '\\' && (template_node->type == AST_STRUCT || template_node->type == AST_UNION)) {
// replace instance with wire representing the packed structure
newNode = make_packed_struct(template_node, str, attributes);
newNode->attributes[ID::wiretype] = mkconst_str(resolved_type_node->str);
// add original input/output attribute to resolved wire