From b31a7cdcbfcaef2a46803fc7906d5c48c37d9b0e Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Tue, 8 May 2012 20:05:43 -0400
Subject: [PATCH] Internals: Fix uninitialized m_alhs

---
 src/V3AstNodes.cpp | 4 +++-
 src/V3AstNodes.h   | 4 +++-
 src/V3Tristate.cpp | 5 +++--
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/V3AstNodes.cpp b/src/V3AstNodes.cpp
index 28d47e0db..7f3afdb62 100644
--- a/src/V3AstNodes.cpp
+++ b/src/V3AstNodes.cpp
@@ -84,8 +84,10 @@ void AstVar::combineType(AstVarType type) {
     // These flags get combined with the existing settings of the flags.
     if (type==AstVarType::INPUT || type==AstVarType::INOUT)
 	m_input = true;
-    if (type==AstVarType::OUTPUT || type==AstVarType::INOUT)
+    if (type==AstVarType::OUTPUT || type==AstVarType::INOUT) {
 	m_output = true;
+	m_declOutput = true;
+    }
     if (type==AstVarType::INOUT || type==AstVarType::TRIWIRE
 	|| type==AstVarType::TRI0 || type==AstVarType::TRI1)
 	m_tristate = true;
diff --git a/src/V3AstNodes.h b/src/V3AstNodes.h
index 809ed050b..64d24e0d2 100644
--- a/src/V3AstNodes.h
+++ b/src/V3AstNodes.h
@@ -709,6 +709,7 @@ private:
     bool	m_input:1;	// Input or inout
     bool	m_output:1;	// Output or inout
     bool	m_tristate:1;	// Inout or triwire or trireg
+    bool	m_declOutput:1; // Inout or output before tristate resolution
     bool	m_primaryIO:1;	// In/out to top level (or directly assigned from same)
     bool	m_sc:1;		// SystemC variable
     bool	m_scClocked:1;	// SystemC sc_clk<> needed
@@ -734,7 +735,7 @@ private:
     bool	m_trace:1;	// Trace this variable
 
     void	init() {
-	m_input=false; m_output=false; m_tristate=false;
+	m_input=false; m_output=false; m_tristate=false; m_declOutput=false;
 	m_primaryIO=false;
 	m_sc=false; m_scClocked=false; m_scSensitive=false;
 	m_usedClock=false; m_usedParam=false; m_usedLoopIdx=false;
@@ -840,6 +841,7 @@ public:
     bool	isOutOnly() const { return m_output && !m_input; }
     bool	isInout() const { return m_input && m_output; }
     bool	isTristate() const  { return m_tristate; }
+    bool	isDeclOutput() const  { return m_declOutput; }
     bool	isPrimaryIO() const { return m_primaryIO; }
     bool	isPrimaryIn() const { return isPrimaryIO() && isInput(); }
     bool	isIO() const  { return (m_input||m_output); }
diff --git a/src/V3Tristate.cpp b/src/V3Tristate.cpp
index a8cf39939..a9b728591 100644
--- a/src/V3Tristate.cpp
+++ b/src/V3Tristate.cpp
@@ -858,9 +858,10 @@ class TristateVisitor : public TristateBaseVisitor {
 public:
     // CONSTUCTORS
     TristateVisitor(AstNode* nodep) {
-	m_unique = 0;
-	m_cellp = NULL;
 	m_modp  = NULL;
+	m_cellp = NULL;
+	m_unique = 0;
+	m_alhs = false;
 	nodep->accept(*this);
     }
     virtual ~TristateVisitor() {