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Fix for GitHub issue 26 - compiler crash when module port has no internal net. 

The compiler correctly reports an error when a module port has no
associated internal net/reg, but could crash when the module was
instantiated.
This commit is contained in:
Martin Whitaker 2014-05-23 23:15:14 +01:00
parent 9b38de596e
commit 6183bf6cd7
1 changed files with 5 additions and 1 deletions
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6
elaborate.cc
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1998-2013 Stephen Williams (steve@icarus.com)
* Copyright (c) 1998-2014 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
@ -1170,6 +1170,10 @@ void PGModule::elaborate_mod_(Design*des, Module*rmod, NetScope*scope) const
perm_string pname = peek_tail_name(mport[0]->path());
NetNet*tmp = instance[0]->find_signal(pname);
// Handle the error case where there is no internal
// signal connected to the port.
if (!tmp) continue;
ivl_assert(*this, tmp);
if (tmp->port_type() == NetNet::PINPUT) {