Fix generated inouts with duplicated modules, bug498.

src/V3AstNodes.cpp

@@ -632,6 +632,8 @@ void AstVar::dump(ostream& str) {
 	else if (isOutput()) str<<" [O]";
     }
     if (isConst()) str<<" [CONST]";
+    if (isPullup()) str<<" [PULLUP]";
+    if (isPulldown()) str<<" [PULLDOWN]";
     if (isUsedClock()) str<<" [CLK]";
     if (isSigPublic()) str<<" [P]";
     if (isUsedLoopIdx()) str<<" [LOOP]";

src/V3Inst.cpp

@@ -237,7 +237,7 @@ public:
 //######################################################################
 // Inst class functions
 
-AstAssignW* V3Inst::pinReconnectSimple(AstPin* pinp, AstCell* cellp, AstNodeModule* modp, bool forTristate) {
+AstAssignW* V3Inst::pinReconnectSimple(AstPin* pinp, AstCell* cellp, AstNodeModule*, bool forTristate) {
     // If a pin connection is "simple" leave it as-is
     // Else create a intermediate wire to perform the interconnect
     // Return the new assignment, if one was made
@@ -269,7 +269,8 @@ AstAssignW* V3Inst::pinReconnectSimple(AstPin* pinp, AstCell* cellp, AstNodeModu
 	AstNode* pinexprp = pinp->exprp()->unlinkFrBack();
 	string newvarname = "__Vcellinp__"+cellp->name()+"__"+pinp->name();
 	AstVar* newvarp = new AstVar (pinVarp->fileline(), AstVarType::MODULETEMP, newvarname, pinVarp);
-	modp->addStmtp(newvarp);
+	// Important to add statement next to cell, in case there is a generate with same named cell
+	cellp->addNextHere(newvarp);
 	if (pinVarp->isInout()) {
 	    pinVarp->v3fatalSrc("Unsupported: Inout connections to pins must be direct one-to-one connection (without any expression)");
 	} else if (pinVarp->isOutput()) {
@@ -296,7 +297,7 @@ AstAssignW* V3Inst::pinReconnectSimple(AstPin* pinp, AstCell* cellp, AstNodeModu
 	    pinp->exprp(new AstVarRef (pinexprp->fileline(), newvarp, false));
 	}
 	pinp->widthSignedFrom(pinp->exprp());
-	if (assignp) modp->addStmtp(assignp);
+	if (assignp) cellp->addNextHere(assignp);
 	//if (1||debug()) { pinp->dumpTree(cout,"  out:"); }
 	//if (1||debug()) { assignp->dumpTree(cout," aout:"); }
     }

src/V3Tristate.cpp

@@ -591,6 +591,7 @@ class TristateVisitor : public TristateBaseVisitor {
 	// Propagate any pullups/pulldowns upwards if necessary
 	if (refp) {
 	    if (AstPull* pullp = (AstPull*) nodep->modVarp()->user3p()) {
+		UINFO(9, "propagate pull to "<<refp->varp());
 		if (!refp->varp()->user3p()) {
 		    refp->varp()->user3p(pullp);
 		} else {
@@ -636,6 +637,7 @@ class TristateVisitor : public TristateBaseVisitor {
 	    AstNode* newp = new AstPull(nodep->fileline(),
 					new AstVarRef(nodep->fileline(), nodep, true),
 					nodep->isPullup());
+	    UINFO(9,"New pull "<<newp);
 	    m_modp->addStmtp(newp);
 	    // We'll iterate on the new AstPull later
 	}
@@ -725,6 +727,7 @@ class TristateVisitor : public TristateBaseVisitor {
 		//
 		outvarp->user1p(envarp);
 		outvarp->user3p(invarp->user3p());
+		if (invarp->user3p()) UINFO(9, "propagate pull to "<<outvarp);
 	    } else if (invarp->user1p()) {
 		envarp = invarp->user1p()->castNode()->castVar();  // From CASEEQ, foo === 1'bz
 	    }
@@ -788,6 +791,7 @@ class TristateVisitor : public TristateBaseVisitor {
 		AstPull* pullp = (AstPull*)lhsp->user3p();
 		if (pullp && pullp->direction() == 1) {
 		    pull.setAllBits1();
+		    UINFO(9,"Has pullup "<<pullp<<endl);
 		} else {
 		    pull.setAllBits0(); // default pull direction is down.
 		}

src/verilog.y

@@ -868,9 +868,9 @@ portDirNetE:			// IEEE: part of port, optional net type and/or direction
 		/* empty */				{ }
 	//			// Per spec, if direction given default the nettype.
 	//			// The higher level rule may override this VARDTYPE with one later in the parse.
-	|	port_direction				{ VARDECL(PORT); VARDTYPE(NULL/*default_nettype*/); }
+	|	port_direction					{ VARDECL(PORT); VARDTYPE(NULL/*default_nettype*/); }
-	|	port_direction net_type			{ VARDECL(PORT); VARDTYPE(NULL/*default_nettype*/); } // net_type calls VARNET
+	|	port_direction { VARDECL(PORT); } net_type	{ VARDTYPE(NULL/*default_nettype*/); } // net_type calls VARNET
-	|	net_type				{ } // net_type calls VARNET
+	|	net_type					{ } // net_type calls VARNET
  	;
 
 port_declNetE:			// IEEE: part of port_declaration, optional net type

test_regress/t/t_tri_gen.pl

@@ -0,0 +1,18 @@
+#!/usr/bin/perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2003 by Wilson Snyder. This program is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+
+compile (
+	 );
+
+execute (
+	 check_finished=>1,
+     );
+
+ok(1);
+1;

test_regress/t/t_tri_gen.v

@@ -0,0 +1,43 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// This file ONLY is placed into the Public Domain, for any use,
+// without warranty, 2012 by Wilson Snyder.
+
+module t (/*AUTOARG*/
+   // Inputs
+   clk
+   );
+   input clk;
+
+   tri z0;
+   tri z1;
+
+   updown #(0) updown0 (.z(z0));
+   updown #(1) updown1 (.z(z1));
+
+   always @ (posedge clk) begin
+      if (z0 !== 0) $stop;
+      if (z1 !== 1) $stop;
+      $write("*-* All Finished *-*\n");
+      $finish;
+   end
+
+endmodule
+
+module updown #(parameter UP=0)
+   (inout z);
+   generate
+      if (UP) begin
+	 t_up sub (.z);
+      end
+      else begin
+	 t_down sub (.z);
+      end
+   endgenerate
+endmodule
+
+module t_up (inout tri1 z); 
+endmodule
+
+module t_down (inout tri0 z); 
+endmodule