Internals: Add some FileLine stats

src/V3FileLine.cpp

@@ -26,6 +26,7 @@
 # include "V3Global.h"
 # include "V3Control.h"
 # include "V3File.h"
+# include "V3Stats.h"
 #endif
 #include "V3Waiver.h"
 // clang-format on
@@ -551,6 +552,18 @@ void FileLine::operator delete(void* objp, size_t size) {
 }
 #endif
 
+void FileLine::stats() {
+#ifndef V3ERROR_NO_GLOBAL_
+    V3Stats::addStatSum("FileLines, Number of filenames",
+                        singleton().m_names.size());  // Max m_filenameno
+    V3Stats::addStatSum("FileLines, Message enable sets",
+                        singleton().m_internedMsgEns.size());  // Max m_msgEnIdx
+    // Don't currently have a good path to recording max line/column,
+    // Infrequently useful, alternatively we could keep globals we update as make each FileLine
+    // or could use fileLineLeakChecks.
+#endif
+}
+
 void FileLine::deleteAllRemaining() {
 #ifdef VL_LEAK_CHECKS
     // FileLines are allocated, but never nicely freed, as it's much faster

src/V3FileLine.h

@@ -213,6 +213,7 @@ public:
     FileLine* copyOrSameFileLine();
     FileLine* copyOrSameFileLineApplied();
     static void deleteAllRemaining();
+    static void stats();
     ~FileLine();
 #ifdef VL_LEAK_CHECKS
     static void* operator new(size_t size);

src/Verilator.cpp

@@ -119,6 +119,7 @@ V3Global v3Global;
 
 static void reportStatsIfEnabled() {
     if (v3Global.opt.stats()) {
+        FileLine::stats();
         V3Stats::statsFinalAll(v3Global.rootp());
         V3Stats::statsReport();
     }