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

1 files changed, 83 insertions, 0 deletions

diff --git a/lib/Checker/SimpleConstraintManager.h b/lib/Checker/SimpleConstraintManager.h
new file mode 100644
index 0000000000..5f20e0072b
--- /dev/null
+++ b/lib/Checker/SimpleConstraintManager.h
@@ -0,0 +1,83 @@
+//== SimpleConstraintManager.h ----------------------------------*- C++ -*--==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  Code shared between BasicConstraintManager and RangeConstraintManager.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_ANALYSIS_SIMPLE_CONSTRAINT_MANAGER_H
+#define LLVM_CLANG_ANALYSIS_SIMPLE_CONSTRAINT_MANAGER_H
+
+#include "clang/Checker/PathSensitive/ConstraintManager.h"
+#include "clang/Checker/PathSensitive/GRState.h"
+
+namespace clang {
+
+class SimpleConstraintManager : public ConstraintManager {
+  GRSubEngine &SU;
+public:
+  SimpleConstraintManager(GRSubEngine &subengine) : SU(subengine) {}
+  virtual ~SimpleConstraintManager();
+
+  //===------------------------------------------------------------------===//
+  // Common implementation for the interface provided by ConstraintManager.
+  //===------------------------------------------------------------------===//
+
+  bool canReasonAbout(SVal X) const;
+
+  const GRState *Assume(const GRState *state, DefinedSVal Cond,
+                        bool Assumption);
+
+  const GRState *Assume(const GRState *state, Loc Cond, bool Assumption);
+
+  const GRState *Assume(const GRState *state, NonLoc Cond, bool Assumption);
+
+  const GRState *AssumeSymInt(const GRState *state, bool Assumption,
+                              const SymIntExpr *SE);
+
+  const GRState *AssumeInBound(const GRState *state, DefinedSVal Idx,
+                               DefinedSVal UpperBound,
+                               bool Assumption);
+
+protected:
+
+  //===------------------------------------------------------------------===//
+  // Interface that subclasses must implement.
+  //===------------------------------------------------------------------===//
+
+  virtual const GRState *AssumeSymNE(const GRState *state, SymbolRef sym,
+                                     const llvm::APSInt& V) = 0;
+
+  virtual const GRState *AssumeSymEQ(const GRState *state, SymbolRef sym,
+                                     const llvm::APSInt& V) = 0;
+
+  virtual const GRState *AssumeSymLT(const GRState *state, SymbolRef sym,
+                                     const llvm::APSInt& V) = 0;
+
+  virtual const GRState *AssumeSymGT(const GRState *state, SymbolRef sym,
+                                     const llvm::APSInt& V) = 0;
+
+  virtual const GRState *AssumeSymLE(const GRState *state, SymbolRef sym,
+                                     const llvm::APSInt& V) = 0;
+
+  virtual const GRState *AssumeSymGE(const GRState *state, SymbolRef sym,
+                                     const llvm::APSInt& V) = 0;
+
+  //===------------------------------------------------------------------===//
+  // Internal implementation.
+  //===------------------------------------------------------------------===//
+
+  const GRState *AssumeAux(const GRState *state, Loc Cond,bool Assumption);
+
+  const GRState *AssumeAux(const GRState *state, NonLoc Cond, bool Assumption);
+};
+
+}  // end clang namespace
+
+#endif