Split libAnalysis into two libraries: libAnalysis and libChecker.
(1) libAnalysis is a generic analysis library that can be used by
Sema. It defines the CFG, basic dataflow analysis primitives, and
inexpensive flow-sensitive analyses (e.g. LiveVariables).
(2) libChecker contains the guts of the static analyzer, incuding the
path-sensitive analysis engine and domain-specific checks.
Now any clients that want to use the frontend to build their own tools
don't need to link in the entire static analyzer.
This change exposes various obvious cleanups that can be made to the
layout of files and headers in libChecker. More changes pending. :)
This change also exposed a layering violation between AnalysisContext
and MemRegion. BlockInvocationContext shouldn't explicitly know about
BlockDataRegions. For now I've removed the BlockDataRegion* from
BlockInvocationContext (removing context-sensitivity; although this
wasn't used yet). We need to have a better way to extend
BlockInvocationContext (and any LocationContext) to add
context-sensitivty.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94406 91177308-0d34-0410-b5e6-96231b3b80d8
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());
+}