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Handle uninitialised variables in constant user functions.

This commit is contained in:
Martin Whitaker 2013-03-06 18:32:05 +00:00 committed by Stephen Williams
parent 5d7558b5e0
commit 5929a00845
1 changed files with 17 additions and 0 deletions
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17
net_func_eval.cc
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@ -401,6 +401,23 @@ NetExpr* NetESignal::evaluate_function(const LineInfo&,
return 0; return 0;
} }
if (ptr->second == 0) {
switch (expr_type()) {
case IVL_VT_REAL:
ptr->second = new NetECReal( verireal(0.0) );
break;
case IVL_VT_BOOL:
ptr->second = make_const_0(expr_width());
break;
case IVL_VT_LOGIC:
ptr->second = make_const_x(expr_width());
break;
default:
cerr << get_fileline() << ": sorry: I don't know how to initialize " << *this << endl;
return 0;
}
}
return ptr->second->dup_expr(); return ptr->second->dup_expr();
} }