Check if a BugReporterVisitor has already been added to a BugReporterContext.

This avoids redundant diagnostics.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99063 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/Checker/BugReporter.cpp b/lib/Checker/BugReporter.cpp
index 0cf593b260..f26d16120e 100644
--- a/lib/Checker/BugReporter.cpp
+++ b/lib/Checker/BugReporter.cpp
@@ -36,6 +36,21 @@ BugReporterContext::~BugReporterContext() {
     if ((*I)->isOwnedByReporterContext()) delete *I;
 }
 
+void BugReporterContext::addVisitor(BugReporterVisitor* visitor) {
+  if (!visitor)
+    return;
+
+  llvm::FoldingSetNodeID ID;
+  visitor->Profile(ID);
+  void *InsertPos;
+
+  if (CallbacksSet.FindNodeOrInsertPos(ID, InsertPos))
+    return;
+
+  CallbacksSet.InsertNode(visitor, InsertPos);
+  Callbacks = F.Add(visitor, Callbacks);
+}
+
 //===----------------------------------------------------------------------===//
 // Helper routines for walking the ExplodedGraph and fetching statements.
 //===----------------------------------------------------------------------===//