diff options
Diffstat (limited to 'frontends/ast')
| -rw-r--r-- | frontends/ast/simplify.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 5ab778e66..552fc04bc 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -186,6 +186,13 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, AstNode *first_node = this_wire_scope[node->str]; if (!node->is_input && !node->is_output && node->is_reg && node->children.size() == 0) goto wires_are_compatible; + if (first_node->children.size() == 0 && node->children.size() == 1 && node->children[0]->type == AST_RANGE) { + AstNode *r = node->children[0]; + if (r->range_valid && r->range_left == 0 && r->range_right == 0) { + delete r; + node->children.pop_back(); + } + } if (first_node->children.size() != node->children.size()) goto wires_are_incompatible; for (size_t j = 0; j < node->children.size(); j++) { |