Check in LLVM r95781.
diff --git a/lib/Checker/GRBlockCounter.cpp b/lib/Checker/GRBlockCounter.cpp
new file mode 100644
index 0000000..3fa3e1e
--- /dev/null
+++ b/lib/Checker/GRBlockCounter.cpp
@@ -0,0 +1,54 @@
+//==- GRBlockCounter.h - ADT for counting block visits -------------*- C++ -*-//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines GRBlockCounter, an abstract data type used to count
+// the number of times a given block has been visited along a path
+// analyzed by GRCoreEngine.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Checker/PathSensitive/GRBlockCounter.h"
+#include "llvm/ADT/ImmutableMap.h"
+
+using namespace clang;
+
+typedef llvm::ImmutableMap<unsigned,unsigned> CountMap;
+
+static inline CountMap GetMap(void* D) {
+ return CountMap(static_cast<CountMap::TreeTy*>(D));
+}
+
+static inline CountMap::Factory& GetFactory(void* F) {
+ return *static_cast<CountMap::Factory*>(F);
+}
+
+unsigned GRBlockCounter::getNumVisited(unsigned BlockID) const {
+ CountMap M = GetMap(Data);
+ CountMap::data_type* T = M.lookup(BlockID);
+ return T ? *T : 0;
+}
+
+GRBlockCounter::Factory::Factory(llvm::BumpPtrAllocator& Alloc) {
+ F = new CountMap::Factory(Alloc);
+}
+
+GRBlockCounter::Factory::~Factory() {
+ delete static_cast<CountMap::Factory*>(F);
+}
+
+GRBlockCounter
+GRBlockCounter::Factory::IncrementCount(GRBlockCounter BC, unsigned BlockID) {
+ return GRBlockCounter(GetFactory(F).Add(GetMap(BC.Data), BlockID,
+ BC.getNumVisited(BlockID)+1).getRoot());
+}
+
+GRBlockCounter
+GRBlockCounter::Factory::GetEmptyCounter() {
+ return GRBlockCounter(GetFactory(F).GetEmptyMap().getRoot());
+}