1 files changed, 85 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Checker/GRBlockCounter.cpp b/contrib/llvm/tools/clang/lib/Checker/GRBlockCounter.cpp
new file mode 100644
index 0000000..cd26060
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Checker/GRBlockCounter.cpp
@@ -0,0 +1,85 @@
+//==- 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;
+
+namespace {
+
+class CountKey {
+  const StackFrameContext *CallSite;
+  unsigned BlockID;
+
+public:
+  CountKey(const StackFrameContext *CS, unsigned ID) 
+    : CallSite(CS), BlockID(ID) {}
+
+  bool operator==(const CountKey &RHS) const {
+    return (CallSite == RHS.CallSite) && (BlockID == RHS.BlockID);
+  }
+
+  bool operator<(const CountKey &RHS) const {
+    return (CallSite == RHS.CallSite) ? (BlockID < RHS.BlockID) 
+                                      : (CallSite < RHS.CallSite);
+  }
+
+  void Profile(llvm::FoldingSetNodeID &ID) const {
+    ID.AddPointer(CallSite);
+    ID.AddInteger(BlockID);
+  }
+};
+
+}
+
+typedef llvm::ImmutableMap<CountKey, 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(const StackFrameContext *CallSite, 
+                                       unsigned BlockID) const {
+  CountMap M = GetMap(Data);
+  CountMap::data_type* T = M.lookup(CountKey(CallSite, 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, 
+                                        const StackFrameContext *CallSite,
+                                        unsigned BlockID) {
+  return GRBlockCounter(GetFactory(F).Add(GetMap(BC.Data), 
+                                          CountKey(CallSite, BlockID),
+                             BC.getNumVisited(CallSite, BlockID)+1).getRoot());
+}
+
+GRBlockCounter
+GRBlockCounter::Factory::GetEmptyCounter() {
+  return GRBlockCounter(GetFactory(F).GetEmptyMap().getRoot());
+}