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-rw-r--r--frontends/ast/simplify.cc8
1 files changed, 8 insertions, 0 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 8e205cb76..5fa4ac83b 100644
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -3342,6 +3342,14 @@ skip_dynamic_range_lvalue_expansion:;
wire->type = AST_LOCALPARAM;
wire->attributes.erase(ID::nosync);
wire->children.insert(wire->children.begin(), arg->clone());
+ // args without a range implicitly have width 1
+ if (wire->children.back()->type != AST_RANGE) {
+ AstNode* range = new AstNode();
+ range->type = AST_RANGE;
+ wire->children.push_back(range);
+ range->children.push_back(mkconst_int(0, true));
+ range->children.push_back(mkconst_int(0, true));
+ }
continue;
}
AstNode *wire_id = new AstNode(AST_IDENTIFIER);