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Resize constants in eval_expr when needed. 

If we are given an unsized constant that is smaller then the requested
width then resize the constant to fit.
(cherry picked from commit acb55916da)
This commit is contained in:
Cary R 2010-09-13 15:45:19 -07:00 committed by Stephen Williams
parent cc024fde2b
commit f4bec3b713
1 changed files with 8 additions and 1 deletions
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9
netmisc.cc
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@ -289,8 +289,15 @@ NetExpr* elab_and_eval(Design*des, NetScope*scope,
void eval_expr(NetExpr*&expr, int prune_width)
{
assert(expr);
if (dynamic_cast<NetEConst*>(expr)) return;
if (dynamic_cast<NetECReal*>(expr)) return;
/* Resize a constant if allowed and needed. */
if (NetEConst *tmp = dynamic_cast<NetEConst*>(expr)) {
if (prune_width <= 0) return;
if (tmp->has_width()) return;
if ((unsigned)prune_width <= tmp->expr_width()) return;
expr = pad_to_width(expr, (unsigned)prune_width, *expr);
return;
}
NetExpr*tmp = expr->eval_tree(prune_width);
if (tmp != 0) {