Fix $global_clock handling vs autowire

Signed-off-by: Clifford Wolf <clifford@clifford.at>

diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 1c35516d4be03daacecb8803fe75c65ff595a83e..d0b31078a2ea1c0d23022bddbe1f5798b319fa0d 100644 (file)
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -941,7 +941,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage,
                        }
                }
                if (current_scope.count(str) == 0) {
-                       if (flag_autowire) {
+                       if (flag_autowire || str == "\\$global_clock") {
                                AstNode *auto_wire = new AstNode(AST_AUTOWIRE);
                                auto_wire->str = str;
                                current_ast_mod->children.push_back(auto_wire);