Check in LLVM r95781.
diff --git a/lib/Checker/ValueManager.cpp b/lib/Checker/ValueManager.cpp
new file mode 100644
index 0000000..5359489
--- /dev/null
+++ b/lib/Checker/ValueManager.cpp
@@ -0,0 +1,153 @@
+//== ValueManager.cpp - Aggregate manager of symbols and SVals --*- 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 ValueManager, a class that manages symbolic values
+// and SVals created for use by GRExprEngine and related classes. It
+// wraps and owns SymbolManager, MemRegionManager, and BasicValueFactory.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Checker/PathSensitive/ValueManager.h"
+#include "clang/Analysis/AnalysisContext.h"
+
+using namespace clang;
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// Utility methods for constructing SVals.
+//===----------------------------------------------------------------------===//
+
+DefinedOrUnknownSVal ValueManager::makeZeroVal(QualType T) {
+ if (Loc::IsLocType(T))
+ return makeNull();
+
+ if (T->isIntegerType())
+ return makeIntVal(0, T);
+
+ // FIXME: Handle floats.
+ // FIXME: Handle structs.
+ return UnknownVal();
+}
+
+//===----------------------------------------------------------------------===//
+// Utility methods for constructing Non-Locs.
+//===----------------------------------------------------------------------===//
+
+NonLoc ValueManager::makeNonLoc(const SymExpr *lhs, BinaryOperator::Opcode op,
+ const APSInt& v, QualType T) {
+ // The Environment ensures we always get a persistent APSInt in
+ // BasicValueFactory, so we don't need to get the APSInt from
+ // BasicValueFactory again.
+ assert(!Loc::IsLocType(T));
+ return nonloc::SymExprVal(SymMgr.getSymIntExpr(lhs, op, v, T));
+}
+
+NonLoc ValueManager::makeNonLoc(const SymExpr *lhs, BinaryOperator::Opcode op,
+ const SymExpr *rhs, QualType T) {
+ assert(SymMgr.getType(lhs) == SymMgr.getType(rhs));
+ assert(!Loc::IsLocType(T));
+ return nonloc::SymExprVal(SymMgr.getSymSymExpr(lhs, op, rhs, T));
+}
+
+
+SVal ValueManager::convertToArrayIndex(SVal V) {
+ if (V.isUnknownOrUndef())
+ return V;
+
+ // Common case: we have an appropriately sized integer.
+ if (nonloc::ConcreteInt* CI = dyn_cast<nonloc::ConcreteInt>(&V)) {
+ const llvm::APSInt& I = CI->getValue();
+ if (I.getBitWidth() == ArrayIndexWidth && I.isSigned())
+ return V;
+ }
+
+ return SVator->EvalCastNL(cast<NonLoc>(V), ArrayIndexTy);
+}
+
+DefinedOrUnknownSVal ValueManager::getRegionValueSymbolVal(const MemRegion* R,
+ QualType T) {
+
+ if (T.isNull()) {
+ const TypedRegion* TR = cast<TypedRegion>(R);
+ T = TR->getValueType(SymMgr.getContext());
+ }
+
+ if (!SymbolManager::canSymbolicate(T))
+ return UnknownVal();
+
+ SymbolRef sym = SymMgr.getRegionValueSymbol(R, T);
+
+ if (Loc::IsLocType(T))
+ return loc::MemRegionVal(MemMgr.getSymbolicRegion(sym));
+
+ return nonloc::SymbolVal(sym);
+}
+
+DefinedOrUnknownSVal ValueManager::getConjuredSymbolVal(const void *SymbolTag,
+ const Expr *E,
+ unsigned Count) {
+ QualType T = E->getType();
+
+ if (!SymbolManager::canSymbolicate(T))
+ return UnknownVal();
+
+ SymbolRef sym = SymMgr.getConjuredSymbol(E, Count, SymbolTag);
+
+ if (Loc::IsLocType(T))
+ return loc::MemRegionVal(MemMgr.getSymbolicRegion(sym));
+
+ return nonloc::SymbolVal(sym);
+}
+
+DefinedOrUnknownSVal ValueManager::getConjuredSymbolVal(const void *SymbolTag,
+ const Expr *E,
+ QualType T,
+ unsigned Count) {
+
+ if (!SymbolManager::canSymbolicate(T))
+ return UnknownVal();
+
+ SymbolRef sym = SymMgr.getConjuredSymbol(E, T, Count, SymbolTag);
+
+ if (Loc::IsLocType(T))
+ return loc::MemRegionVal(MemMgr.getSymbolicRegion(sym));
+
+ return nonloc::SymbolVal(sym);
+}
+
+
+DefinedOrUnknownSVal
+ValueManager::getDerivedRegionValueSymbolVal(SymbolRef parentSymbol,
+ const TypedRegion *R) {
+ QualType T = R->getValueType(R->getContext());
+
+ if (!SymbolManager::canSymbolicate(T))
+ return UnknownVal();
+
+ SymbolRef sym = SymMgr.getDerivedSymbol(parentSymbol, R);
+
+ if (Loc::IsLocType(T))
+ return loc::MemRegionVal(MemMgr.getSymbolicRegion(sym));
+
+ return nonloc::SymbolVal(sym);
+}
+
+DefinedSVal ValueManager::getFunctionPointer(const FunctionDecl* FD) {
+ return loc::MemRegionVal(MemMgr.getFunctionTextRegion(FD));
+}
+
+DefinedSVal ValueManager::getBlockPointer(const BlockDecl *D,
+ CanQualType locTy,
+ const LocationContext *LC) {
+ const BlockTextRegion *BC =
+ MemMgr.getBlockTextRegion(D, locTy, LC->getAnalysisContext());
+ const BlockDataRegion *BD = MemMgr.getBlockDataRegion(BC, LC);
+ return loc::MemRegionVal(BD);
+}
+