WIP: reworked log enabling in LVS, added 'no_lvs_hints' feature, updated tests

src/db/db/dbLayoutVsSchematicWriter.cc

@@ -239,6 +239,7 @@ void std_writer_impl<Keys>::write (TokenizedOutput &stream, const db::NetlistCro
 
       for (db::NetlistCrossReference::PerCircuitData::log_entries_const_iterator l = pcd->log_entries.begin (); l != pcd->log_entries.end (); ++l) {
         TokenizedOutput (o, Keys::log_entry_key, true) << severity_to_s (l->severity) << message_to_s (l->msg);
+        o << endl;
       }
 
     }

src/db/db/dbNetlistCompare.cc

@@ -62,6 +62,8 @@ NetlistComparer::NetlistComparer (NetlistCompareLogger *logger)
 
   m_dont_consider_net_names = false;
   m_case_sensitive = false;
+
+  m_with_log = true;
 }
 
 NetlistComparer::~NetlistComparer ()
@@ -382,7 +384,7 @@ NetlistComparer::compare_impl (const db::Netlist *a, const db::Netlist *b) const
 
         std::string msg = generate_subcircuits_not_verified_warning (ca, verified_circuits_a, cb, verified_circuits_b);
 
-        if (mp_logger->wants_log_entries ()) {
+        if (m_with_log) {
           mp_logger->log_entry (db::NetlistCompareLogger::Error, msg);
         }
 
@@ -896,7 +898,7 @@ NetlistComparer::compare_circuits (const db::Circuit *c1, const db::Circuit *c2,
       //  in must_match mode, check if the nets are identical
       if (mp_logger) {
         if (p->second && ! exact_match) {
-          if (mp_logger->wants_log_entries ()) {
+          if (m_with_log) {
             mp_logger->log_entry (db::NetlistCompareLogger::Error,
                                   tl::sprintf (tl::to_string (tr ("Nets %s are paired explicitly, but are not identical topologically")), nets2string (p->first)));
           }
@@ -983,6 +985,7 @@ NetlistComparer::compare_circuits (const db::Circuit *c1, const db::Circuit *c2,
     compare.subcircuit_equivalence = &subcircuit_equivalence;
     compare.device_equivalence = &device_equivalence;
     compare.logger = mp_logger;
+    compare.with_log = m_with_log;
     compare.progress = &progress;
 
     std::vector<NodeEdgePair> nodes, other_nodes;
@@ -1085,7 +1088,7 @@ NetlistComparer::compare_circuits (const db::Circuit *c1, const db::Circuit *c2,
 
     }
 
-    if (pass + 1 == num_passes && ! good && mp_logger && mp_logger->wants_log_entries ()) {
+    if (pass + 1 == num_passes && ! good && mp_logger && m_with_log) {
       compare.analyze_failed_matches ();
     }
 
@@ -1211,7 +1214,7 @@ NetlistComparer::handle_pin_mismatch (const db::NetGraph &g1, const db::Circuit
   } else {
 
     if (mp_logger) {
-      if (mp_logger->wants_log_entries ()) {
+      if (m_with_log) {
         analyze_pin_mismatch (pin1, c1, pin2, c2, mp_logger);
       }
       mp_logger->pin_mismatch (pin1, pin2);

src/db/db/dbNetlistCompare.h

@@ -100,17 +100,9 @@ public:
 
   /**
    *  @brief Receives log entries for the current circuit pair
-   *  These events are only generated when the "wants_log_entry" hint returns true.
    */
   virtual void log_entry (Severity /*level*/, const std::string & /*msg*/) { }
 
-  /**
-   *  @brief Returns a value indicating whether log entries need to be generated
-   *  Log entries may include hints which are expensive to compute. This method tells the
-   *  matching algorithm whether to create such entries or not.
-   */
-  virtual bool wants_log_entries () const { return false; }
-
   /**
    *  @brief Nets a and b match exactly
    */
@@ -280,6 +272,24 @@ public:
     return m_max_depth;
   }
 
+  /**
+   *  @brief Sets a value indicating that log messages are generated
+   *  Log messages may be expensive to compute, hence they can be turned off.
+   *  By default, log messages are generated.
+   */
+  void set_with_log (bool f)
+  {
+    m_with_log = f;
+  }
+
+  /**
+   *  @brief Gets a value indicating that log messages are generated
+   */
+  bool with_log () const
+  {
+    return m_with_log;
+  }
+
   /**
    *  @brief Sets a value indicating whether not to consider net names
    *  This feature is mainly intended for testing.
@@ -388,6 +398,7 @@ protected:
   bool handle_pin_mismatch (const NetGraph &g1, const db::Circuit *c1, const db::Pin *pin1, const NetGraph &g2, const db::Circuit *c2, const db::Pin *p2) const;
 
   mutable NetlistCompareLogger *mp_logger;
+  bool m_with_log;
   std::map<std::pair<const db::Circuit *, const db::Circuit *>, std::vector<std::pair<std::pair<const Net *, const Net *>, bool> > > m_same_nets;
   std::unique_ptr<CircuitPinCategorizer> mp_circuit_pin_categorizer;
   std::unique_ptr<DeviceCategorizer> mp_device_categorizer;

src/db/db/dbNetlistCompareCore.cc

@@ -403,6 +403,7 @@ NetlistCompareCore::NetlistCompareCore (NetGraph *graph, NetGraph *other_graph)
     dont_consider_net_names (false),
     with_ambiguous (false),
     logger (0),
+    with_log (true),
     circuit_pin_mapper (0),
     subcircuit_equivalence (0),
     device_equivalence (0),
@@ -1050,7 +1051,7 @@ NetlistCompareCore::derive_node_identities_from_ambiguity_group (const NodeRange
 
       if (ambiguous) {
         if (logger) {
-          if (logger->wants_log_entries ()) {
+          if (with_log) {
             logger->log_entry (db::NetlistCompareLogger::Warning,
                                tl::sprintf (tl::to_string (tr ("Matching nets %s from an ambiguous group of nets")), nets2string (p->first->net (), p->second->net ())));
           }
@@ -1114,7 +1115,7 @@ NetlistCompareCore::derive_node_identities_from_ambiguity_group (const NodeRange
           }
         }
 
-        if (logger && logger->wants_log_entries () && was_ambiguous) {
+        if (logger && with_log && was_ambiguous) {
           logger->log_entry (db::NetlistCompareLogger::Info,
                              tl::sprintf (tl::to_string (tr ("Matching nets %s following an ambiguous match")), nets2string (n->net (), n_other->net ())));
         }
@@ -1550,7 +1551,7 @@ NetlistCompareCore::derive_node_identities_from_node_set (std::vector<NodeEdgePa
   }
 
   if (max_depth != std::numeric_limits<size_t>::max() && depth > max_depth) {
-    if (logger->wants_log_entries ()) {
+    if (with_log) {
       logger->log_entry (db::NetlistCompareLogger::Warning, tl::sprintf (tl::to_string (tr ("Maximum depth exhausted (max depth is %d)")), int (max_depth)));
     }
     if (db::NetlistCompareGlobalOptions::options ()->debug_netcompare) {
@@ -1668,7 +1669,7 @@ NetlistCompareCore::derive_node_identities_from_node_set (std::vector<NodeEdgePa
 
     } else if (max_n_branch != std::numeric_limits<size_t>::max () && double (std::max (nr->num1, nr->num2)) * double (n_branch) > double (max_n_branch)) {
 
-      if (logger->wants_log_entries ()) {
+      if (with_log) {
         logger->log_entry (db::NetlistCompareLogger::Warning, tl::sprintf (tl::to_string (tr ("Maximum complexity exhausted (max complexity is %s, needs at least %s)")), tl::to_string (max_n_branch), tl::to_string (std::max (nr->num1, nr->num2) * n_branch)));
       }
       if (db::NetlistCompareGlobalOptions::options ()->debug_netcompare) {

src/db/db/dbNetlistCompareCore.h

@@ -96,6 +96,7 @@ public:
   bool dont_consider_net_names;
   bool with_ambiguous;
   NetlistCompareLogger *logger;
+  bool with_log;
   CircuitPinCategorizer *circuit_pin_mapper;
   SubCircuitEquivalenceTracker *subcircuit_equivalence;
   DeviceEquivalenceTracker *device_equivalence;

src/db/db/dbNetlistCompareUtils.cc

@@ -71,15 +71,27 @@ nl_compare_debug_indent (size_t depth)
   return s;
 }
 
-const std::string var_sep (" \u21D4 ");
+const std::string var_sep = tl::to_string (tr (" vs. "));
+
+static std::string
+expanded_name (const db::Net *a)
+{
+  if (a == 0) {
+    return tl::to_string (tr ("(not connected)"));
+  } else {
+    return a->expanded_name ();
+  }
+}
 
 std::string
 nets2string (const db::Net *a, const db::Net *b)
 {
-  if (a->expanded_name () != b->expanded_name ()) {
-    return a->expanded_name () + var_sep + b->expanded_name ();
+  std::string na = expanded_name (a);
+  std::string nb = expanded_name (b);
+  if (na != nb) {
+    return na + var_sep + nb;
   } else {
-    return a->expanded_name ();
+    return nb;
   }
 }
 

src/db/db/dbNetlistCrossReference.cc

@@ -27,7 +27,6 @@ namespace db
 {
 
 NetlistCrossReference::NetlistCrossReference ()
-  : m_wants_log_entries (true)
 {
   //  .. nothing yet ..
 }

src/db/db/dbNetlistCrossReference.h

@@ -258,16 +258,6 @@ public:
     gen_subcircuits (a, b, Mismatch, msg);
   }
 
-  virtual bool wants_log_entries () const
-  {
-    return m_wants_log_entries;
-  }
-
-  void set_wants_log_entries (bool f)
-  {
-    m_wants_log_entries = f;
-  }
-
   void clear ();
 
   size_t circuit_count () const
@@ -329,7 +319,6 @@ private:
   std::pair<const db::Circuit *, const db::Circuit *> m_current_circuits;
   PerCircuitData *mp_per_circuit_data;
   PerCircuitData::log_entries_type m_other_log_entries;
-  bool m_wants_log_entries;
 
   void establish_pair (const db::Circuit *a, const db::Circuit *b);
   void establish_pair (const db::Net *a, const db::Net *b, Status status, const std::string &msg);

src/db/db/gsiDeclDbNetlistCompare.cc

@@ -34,7 +34,7 @@ class GenericNetlistCompareLogger
 {
 public:
   GenericNetlistCompareLogger ()
-    : db::NetlistCompareLogger (), m_wants_log (false)
+    : db::NetlistCompareLogger ()
   {
     //  .. nothing yet ..
   }
@@ -151,21 +151,6 @@ public:
     db::NetlistCompareLogger::log_entry (severity, msg);
   }
 
-  virtual bool wants_log () const
-  {
-    return m_wants_log;
-  }
-
-  bool get_wants_log () const
-  {
-    return m_wants_log;
-  }
-
-  void set_wants_log (bool f)
-  {
-    m_wants_log = f;
-  }
-
   virtual void match_nets (const db::Net *a, const db::Net *b)
   {
     if (cb_match_nets.can_issue ()) {
@@ -329,7 +314,6 @@ public:
   gsi::Callback cb_match_nets;
   gsi::Callback cb_circuit_mismatch;
   gsi::Callback cb_log_entry;
-  gsi::Callback cb_wants_log;
   gsi::Callback cb_net_mismatch;
   gsi::Callback cb_match_ambiguous_nets;
   gsi::Callback cb_match_devices;
@@ -344,8 +328,6 @@ public:
 private:
   GenericNetlistCompareLogger (const GenericNetlistCompareLogger &d);
   GenericNetlistCompareLogger &operator= (const GenericNetlistCompareLogger &d);
-
-  bool m_wants_log;
 };
 
 }
@@ -405,20 +387,7 @@ Class<GenericNetlistCompareLogger> decl_GenericNetlistCompareLogger (decl_dbNetl
   gsi::callback ("log_entry", &GenericNetlistCompareLogger::log_entry, &GenericNetlistCompareLogger::cb_log_entry, gsi::arg ("level"), gsi::arg ("msg"),
     "@brief Issues an entry for the compare log.\n"
     "This method delivers a log message generated during the compare of two circuits.\n"
-    "It is called between of \\begin_circuit and \\end_circuit and only if \\wants_log returns true.\n"
-    "\n"
-    "This method has been added in version 0.28."
-  ) +
-  gsi::method ("wants_log=", &GenericNetlistCompareLogger::set_wants_log, gsi::arg ("value"),
-    "@brief Sets a value indicating whether the receiver wants log messages.\n"
-    "Log messages may include compare hints which are expensive to compute. Hence, by default, log generation is turned off. "
-    "Set this attribute to true in order to receive log messages.\n"
-    "\n"
-    "This method has been added in version 0.28."
-  ) +
-  gsi::method ("wants_log", &GenericNetlistCompareLogger::get_wants_log,
-    "@brief Gets a value indicating whether the receiver wants log messages.\n"
-    "See \\wants_log= for details about this flag.\n"
+    "It is called between of \\begin_circuit and \\end_circuit.\n"
     "\n"
     "This method has been added in version 0.28."
   ) +
@@ -525,6 +494,19 @@ Class<db::NetlistComparer> decl_dbNetlistComparer ("db", "NetlistComparer",
     "The logger is a delegate or event receiver which the comparer will send compare events to. "
     "See the class description for more details."
   ) +
+  gsi::method ("with_log=", &db::NetlistComparer::set_with_log, gsi::arg ("flag"),
+    "@brief Sets a value indicating that log messages are generated.\n"
+    "Log messages may be expensive to compute, hence they can be turned off.\n"
+    "By default, log messages are generated.\n"
+    "\n"
+    "This attribute have been introduced in version 0.28.\n"
+  ) +
+  gsi::method ("with_log", &db::NetlistComparer::with_log,
+    "@brief Gets a value indicating that log messages are generated.\n"
+    "See \\with_log= for details about this flag.\n"
+    "\n"
+    "This attribute have been introduced in version 0.28.\n"
+  ) +
   gsi::method ("same_nets", (void (db::NetlistComparer::*) (const db::Net *, const db::Net *, bool)) &db::NetlistComparer::same_nets, gsi::arg ("net_a"), gsi::arg ("net_b"), gsi::arg ("must_match", false),
     "@brief Marks two nets as identical.\n"
     "This makes a net net_a in netlist a identical to the corresponding\n"

src/lvs/lvs/built-in-macros/_lvs_engine.rb

@@ -90,10 +90,16 @@ module LVS
  
     # %LVS%
     # @name compare
-    # @brief Compares the extracted netlist vs. the schematic
+    # @brief Compares the extracted netlist vs. the schematic netlist
     # @synopsis compare
     # See \Netter#compare for a description of that function.
  
+    # %LVS%
+    # @name no_lvs_hints
+    # @brief Disables LVS hints
+    # @synopsis no_lvs_hints
+    # See \Netter#no_lvs_hints for a description of that feature.
+
     # %LVS%
     # @name join_symmetric_nets
     # @brief Joins symmetric nets of selected circuits on the extracted netlist
@@ -216,7 +222,7 @@ module LVS
 
     %w(schematic compare split_gates join_symmetric_nets tolerance ignore_parameter enable_parameter disable_parameter 
        blank_circuit align same_nets same_nets! same_circuits same_device_classes equivalent_pins 
-       min_caps max_res max_depth max_branch_complexity consider_net_names lvs_data).each do |f|
+       min_caps max_res max_depth max_branch_complexity consider_net_names lvs_data no_lvs_hints).each do |f|
       eval <<"CODE"
         def #{f}(*args)
           _netter.#{f}(*args)

src/lvs/lvs/built-in-macros/_lvs_netter.rb

@@ -499,6 +499,7 @@ CODE
     def _comparer_mini
 
       comparer = RBA::NetlistComparer::new
+      comparer.with_log = false
 
       # execute the configuration commands
       @comparer_miniconfig.each do |cc|
@@ -518,6 +519,17 @@ CODE
 
     end
       
+    # %LVS%
+    # @name no_lvs_hints
+    # @brief Disables LVS hints
+    # @synopsis no_lvs_hints
+    # LVS hints may be expensive to compute. Use this function to disable
+    # generation of LVS hints
+
+    def no_lvs_hints
+      @comparer_config << lambda { |comparer| comparer.with_log = false }
+    end
+
     # %LVS%
     # @name same_nets
     # @brief Establishes an equivalence between the nets

testdata/algo/lvs_test2_au.lvsdb.1

@@ -645,6 +645,10 @@ xref(
   )
  )
  circuit(RINGO RINGO nomatch
+  log(
+   entry(error description('Net $I22 is not matching any net from reference netlist'))
+   entry(error description('Net FB is not matching any net from reference netlist'))
+  )
   xref(
    net(8 () mismatch)
    net(7 7 match)

testdata/algo/lvs_test2_au.lvsdb.2

@@ -645,6 +645,10 @@ xref(
   )
  )
  circuit(RINGO RINGO nomatch
+  log(
+   entry(error description('Net $I22 is not matching any net from reference netlist'))
+   entry(error description('Net FB is not matching any net from reference netlist'))
+  )
   xref(
    net(8 () mismatch)
    net(7 7 match)

testdata/algo/lvs_test2b_au.lvsdb.1

@@ -645,6 +645,10 @@ xref(
   )
  )
  circuit(RINGO RINGO nomatch
+  log(
+   entry(error description('Net $I22 is not matching any net from reference netlist'))
+   entry(error description('Net FB is not matching any net from reference netlist'))
+  )
   xref(
    net(8 () mismatch)
    net(7 7 match)

testdata/algo/lvs_test2b_au.lvsdb.2

@@ -645,6 +645,10 @@ xref(
   )
  )
  circuit(RINGO RINGO nomatch
+  log(
+   entry(error description('Net $I22 is not matching any net from reference netlist'))
+   entry(error description('Net FB is not matching any net from reference netlist'))
+  )
   xref(
    net(8 () mismatch)
    net(7 7 match)

testdata/lvs/bbdevices3.lvsdb

@@ -447,6 +447,9 @@ xref(
   )
  )
  circuit(testall TESTALL nomatch
+  log(
+   entry(error description('Net $5 is not matching any net from reference netlist'))
+  )
   xref(
    net(() 7 mismatch)
    net(2 2 match)

testdata/lvs/bbdevices3b.lvsdb

@@ -293,6 +293,9 @@ xref(
   )
  )
  circuit(BWBTEST BWBTEST nomatch
+  log(
+   entry(error description('No equivalent pin A from reference netlist found in netlist.\nThis is an indication that a physical connection is not made to the subcircuit.'))
+  )
   xref(
    pin(() 0 mismatch)
    pin(0 1 match)

testdata/lvs/bbdevices4b.lvsdb

@@ -288,6 +288,9 @@ xref(
   )
  )
  circuit(BWBTEST BWBTEST nomatch
+  log(
+   entry(error description('No equivalent pin A from reference netlist found in netlist.\nThis is an indication that a physical connection is not made to the subcircuit.'))
+  )
   xref(
    pin(() 0 mismatch)
    pin(() 1 match)

testdata/lvs/bbdevices5.lvsdb

@@ -450,6 +450,11 @@ xref(
   )
  )
  circuit(testall TESTALL nomatch
+  log(
+   entry(error description('Net $10 is not matching any net from reference netlist'))
+   entry(error description('Net $5 is not matching any net from reference netlist'))
+   entry(info description('Connecting nets $10 and $5 is making a better match to net D1 from reference netlist (fuzziness 0 nodes)'))
+  )
   xref(
    net(5 () mismatch)
    net(2 2 match)

testdata/lvs/bbdevices5b.lvsdb

@@ -326,6 +326,11 @@ xref(
   )
  )
  circuit(testall TESTALL nomatch
+  log(
+   entry(error description('Net $10 is not matching any net from reference netlist'))
+   entry(error description('Net $5 is not matching any net from reference netlist'))
+   entry(info description('Connecting nets $10 and $5 is making a better match to net D1 from reference netlist (fuzziness 0 nodes)'))
+  )
   xref(
    net(5 () mismatch)
    net(2 2 match)

testdata/lvs/bbdevices6.lvsdb

@@ -446,6 +446,9 @@ xref(
   )
  )
  circuit(testall TESTALL nomatch
+  log(
+   entry(error description('Net $2 is not matching any net from reference netlist'))
+  )
   xref(
    net(() 6 mismatch)
    net(3 2 match)

testdata/lvs/bbdevices6b.lvsdb

@@ -322,6 +322,9 @@ xref(
   )
  )
  circuit(testall TESTALL nomatch
+  log(
+   entry(error description('Net $2 is not matching any net from reference netlist'))
+  )
   xref(
    net(() 6 mismatch)
    net(3 2 match)

testdata/lvs/blackbox2.lvsdb

@@ -181,6 +181,10 @@ xref(
   )
  )
  circuit(TOP TOP nomatch
+  log(
+   entry(error description('Nets 3 are paired explicitly, but are not identical topologically'))
+   entry(error description('Nets 4 are paired explicitly, but are not identical topologically'))
+  )
   xref(
    net(4 1 match)
    net(3 2 match)

testdata/lvs/blackbox3.lvsdb

@@ -184,6 +184,9 @@ xref(
   )
  )
  circuit(TOP TOP nomatch
+  log(
+   entry(error description('Nets $1 vs. (not connected) are paired explicitly, but are not identical topologically'))
+  )
   xref(
    net(() 7 mismatch)
    net(1 () mismatch)

testdata/lvs/blackbox4.lvsdb

@@ -180,6 +180,11 @@ xref(
   )
  )
  circuit(TOP TOP nomatch
+  log(
+   entry(error description('Nets (not connected) vs. 5 are paired explicitly, but are not identical topologically'))
+   entry(error description('Nets 5,7 vs. (not connected) are paired explicitly, but are not identical topologically'))
+   entry(error description('Nets (not connected) vs. 7 are paired explicitly, but are not identical topologically'))
+  )
   xref(
    net(() 5 mismatch)
    net(() 7 mismatch)

testdata/lvs/blackbox5.lvsdb

@@ -183,6 +183,12 @@ xref(
   )
  )
  circuit(TOP TOP nomatch
+  log(
+   entry(error description('Nets $1 vs. (not connected) are paired explicitly, but are not identical topologically'))
+   entry(error description('Nets (not connected) vs. 5 are paired explicitly, but are not identical topologically'))
+   entry(error description('Nets 5,7 vs. (not connected) are paired explicitly, but are not identical topologically'))
+   entry(error description('Nets (not connected) vs. 7 are paired explicitly, but are not identical topologically'))
+  )
   xref(
    net(() 5 mismatch)
    net(() 7 mismatch)

testdata/lvs/custom_compare.lvsdb

@@ -100,6 +100,10 @@ reference(
 # Cross reference
 xref(
  circuit(TOP TOP match
+  log(
+   entry(warning description('Matching nets $13 vs. R1 from an ambiguous group of nets'))
+   entry(warning description('Matching nets $14 vs. R2 from an ambiguous group of nets'))
+  )
   xref(
    net(1 1 warning)
    net(2 2 warning)

testdata/lvs/double_height2.lvsdb

@@ -290,6 +290,12 @@ Z(
   )
  )
  X(INV2 INV2 1
+  L(
+   M(W B('Matching nets Q1 from an ambiguous group of nets'))
+   M(W B('Matching nets Q2 from an ambiguous group of nets'))
+   M(I B('Matching nets A1 following an ambiguous match'))
+   M(I B('Matching nets A2 following an ambiguous match'))
+  )
   Z(
    N(1 3 1)
    N(2 5 1)

testdata/lvs/double_height2_texts.lvsdb

@@ -290,6 +290,12 @@ Z(
   )
  )
  X(INV2 INV2 1
+  L(
+   M(W B('Matching nets Q1 from an ambiguous group of nets'))
+   M(W B('Matching nets Q2 from an ambiguous group of nets'))
+   M(I B('Matching nets A1 following an ambiguous match'))
+   M(I B('Matching nets A2 following an ambiguous match'))
+  )
   Z(
    N(1 3 1)
    N(2 5 1)

testdata/lvs/enable_wl3.lvsdb

@@ -107,6 +107,10 @@ reference(
 # Cross reference
 xref(
  circuit(Rre RRE nomatch
+  log(
+   entry(error description('Net gnd! is not matching any net from reference netlist'))
+   entry(error description('Net vdd! is not matching any net from reference netlist'))
+  )
   xref(
    net(() 2 mismatch)
    net(() 1 mismatch)

testdata/lvs/floating.lvsdb

@@ -377,6 +377,12 @@ reference(
 # Cross reference
 xref(
  circuit(DINV DINV match
+  log(
+   entry(warning description('Matching nets B<1> from an ambiguous group of nets'))
+   entry(warning description('Matching nets B<2> from an ambiguous group of nets'))
+   entry(info description('Matching nets A<1> following an ambiguous match'))
+   entry(info description('Matching nets A<2> following an ambiguous match'))
+  )
   xref(
    net(1 1 match)
    net(2 2 match)

testdata/lvs/invchain_cheat.lvsdb

@@ -417,6 +417,12 @@ Z(
   )
  )
  X(INV2 INV2 1
+  L(
+   M(W B('Matching nets $I8 vs. 4 from an ambiguous group of nets'))
+   M(W B('Matching nets $I7 vs. 6 from an ambiguous group of nets'))
+   M(I B('Matching nets $I6 vs. 3 following an ambiguous match'))
+   M(I B('Matching nets $I5 vs. 5 following an ambiguous match'))
+  )
   Z(
    N(5 1 1)
    N(6 2 1)
@@ -435,6 +441,14 @@ Z(
   )
  )
  X(INV3 INV3 1
+  L(
+   M(W B('Matching nets 4 from an ambiguous group of nets'))
+   M(W B('Matching nets 6 from an ambiguous group of nets'))
+   M(W B('Matching nets 8 from an ambiguous group of nets'))
+   M(I B('Matching nets 3 following an ambiguous match'))
+   M(I B('Matching nets 5 following an ambiguous match'))
+   M(I B('Matching nets 7 following an ambiguous match'))
+  )
   Z(
    N(7 1 1)
    N(8 2 1)

testdata/lvs/res_combine1.lvs

@@ -94,4 +94,5 @@ schematic.simplify
 # Netlist vs. netlist
 align
 netlist.simplify
+no_lvs_hints
 compare

testdata/lvs/res_combine2.lvs

@@ -93,4 +93,5 @@ schematic.simplify
 # Netlist vs. netlist
 align
 netlist.simplify
+no_lvs_hints
 compare

testdata/lvs/res_combine3.lvs

@@ -88,4 +88,5 @@ schematic.simplify
 # Netlist vs. netlist
 align
 netlist.simplify
+no_lvs_hints
 compare