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-rw-r--r--lib/Analysis/RValues.cpp399
1 files changed, 0 insertions, 399 deletions
diff --git a/lib/Analysis/RValues.cpp b/lib/Analysis/RValues.cpp
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index db1a8403fb..0000000000
--- a/lib/Analysis/RValues.cpp
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-//= RValues.cpp - Abstract RValues for Path-Sens. Value Tracking -*- 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 SVal, Loc, and NonLoc, classes that represent
-// abstract r-values for use with path-sensitive value tracking.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Analysis/PathSensitive/GRState.h"
-#include "clang/Basic/IdentifierTable.h"
-#include "llvm/Support/Streams.h"
-
-using namespace clang;
-using llvm::dyn_cast;
-using llvm::cast;
-using llvm::APSInt;
-
-//===----------------------------------------------------------------------===//
-// Symbol Iteration.
-//===----------------------------------------------------------------------===//
-
-SVal::symbol_iterator SVal::symbol_begin() const {
-
- // FIXME: This is a rat's nest. Cleanup.
-
- if (isa<loc::SymbolVal>(this))
- return (symbol_iterator) (&Data);
- else if (isa<nonloc::SymbolVal>(this))
- return (symbol_iterator) (&Data);
- else if (isa<nonloc::SymIntConstraintVal>(this)) {
- const SymIntConstraint& C =
- cast<nonloc::SymIntConstraintVal>(this)->getConstraint();
-
- return (symbol_iterator) &C.getSymbol();
- }
- else if (isa<nonloc::LocAsInteger>(this)) {
- const nonloc::LocAsInteger& V = cast<nonloc::LocAsInteger>(*this);
- return V.getPersistentLoc().symbol_begin();
- }
-
- // FIXME: We need to iterate over the symbols of regions.
-
- return NULL;
-}
-
-SVal::symbol_iterator SVal::symbol_end() const {
- symbol_iterator X = symbol_begin();
- return X ? X+1 : NULL;
-}
-
-//===----------------------------------------------------------------------===//
-// Useful predicates.
-//===----------------------------------------------------------------------===//
-
-bool SVal::isZeroConstant() const {
- if (isa<loc::ConcreteInt>(*this))
- return cast<loc::ConcreteInt>(*this).getValue() == 0;
- else if (isa<nonloc::ConcreteInt>(*this))
- return cast<nonloc::ConcreteInt>(*this).getValue() == 0;
- else
- return false;
-}
-
-
-//===----------------------------------------------------------------------===//
-// Transfer function dispatch for Non-Locs.
-//===----------------------------------------------------------------------===//
-
-SVal nonloc::ConcreteInt::EvalBinOp(BasicValueFactory& BasicVals,
- BinaryOperator::Opcode Op,
- const nonloc::ConcreteInt& R) const {
-
- const llvm::APSInt* X =
- BasicVals.EvaluateAPSInt(Op, getValue(), R.getValue());
-
- if (X)
- return nonloc::ConcreteInt(*X);
- else
- return UndefinedVal();
-}
-
- // Bitwise-Complement.
-
-nonloc::ConcreteInt
-nonloc::ConcreteInt::EvalComplement(BasicValueFactory& BasicVals) const {
- return BasicVals.getValue(~getValue());
-}
-
- // Unary Minus.
-
-nonloc::ConcreteInt
-nonloc::ConcreteInt::EvalMinus(BasicValueFactory& BasicVals, UnaryOperator* U) const {
- assert (U->getType() == U->getSubExpr()->getType());
- assert (U->getType()->isIntegerType());
- return BasicVals.getValue(-getValue());
-}
-
-//===----------------------------------------------------------------------===//
-// Transfer function dispatch for Locs.
-//===----------------------------------------------------------------------===//
-
-SVal
-loc::ConcreteInt::EvalBinOp(BasicValueFactory& BasicVals, BinaryOperator::Opcode Op,
- const loc::ConcreteInt& R) const {
-
- assert (Op == BinaryOperator::Add || Op == BinaryOperator::Sub ||
- (Op >= BinaryOperator::LT && Op <= BinaryOperator::NE));
-
- const llvm::APSInt* X = BasicVals.EvaluateAPSInt(Op, getValue(), R.getValue());
-
- if (X)
- return loc::ConcreteInt(*X);
- else
- return UndefinedVal();
-}
-
-NonLoc Loc::EQ(BasicValueFactory& BasicVals, const Loc& R) const {
-
- switch (getSubKind()) {
- default:
- assert(false && "EQ not implemented for this Loc.");
- break;
-
- case loc::ConcreteIntKind:
- if (isa<loc::ConcreteInt>(R)) {
- bool b = cast<loc::ConcreteInt>(this)->getValue() ==
- cast<loc::ConcreteInt>(R).getValue();
-
- return NonLoc::MakeIntTruthVal(BasicVals, b);
- }
- else if (isa<loc::SymbolVal>(R)) {
-
- const SymIntConstraint& C =
- BasicVals.getConstraint(cast<loc::SymbolVal>(R).getSymbol(),
- BinaryOperator::EQ,
- cast<loc::ConcreteInt>(this)->getValue());
-
- return nonloc::SymIntConstraintVal(C);
- }
-
- break;
-
- case loc::SymbolValKind: {
- if (isa<loc::ConcreteInt>(R)) {
-
- const SymIntConstraint& C =
- BasicVals.getConstraint(cast<loc::SymbolVal>(this)->getSymbol(),
- BinaryOperator::EQ,
- cast<loc::ConcreteInt>(R).getValue());
-
- return nonloc::SymIntConstraintVal(C);
- }
-
- assert (!isa<loc::SymbolVal>(R) && "FIXME: Implement unification.");
-
- break;
- }
-
- case loc::MemRegionKind:
- if (isa<loc::MemRegionVal>(R)) {
- bool b = cast<loc::MemRegionVal>(*this) == cast<loc::MemRegionVal>(R);
- return NonLoc::MakeIntTruthVal(BasicVals, b);
- }
-
- break;
- }
-
- return NonLoc::MakeIntTruthVal(BasicVals, false);
-}
-
-NonLoc Loc::NE(BasicValueFactory& BasicVals, const Loc& R) const {
- switch (getSubKind()) {
- default:
- assert(false && "NE not implemented for this Loc.");
- break;
-
- case loc::ConcreteIntKind:
- if (isa<loc::ConcreteInt>(R)) {
- bool b = cast<loc::ConcreteInt>(this)->getValue() !=
- cast<loc::ConcreteInt>(R).getValue();
-
- return NonLoc::MakeIntTruthVal(BasicVals, b);
- }
- else if (isa<loc::SymbolVal>(R)) {
-
- const SymIntConstraint& C =
- BasicVals.getConstraint(cast<loc::SymbolVal>(R).getSymbol(),
- BinaryOperator::NE,
- cast<loc::ConcreteInt>(this)->getValue());
-
- return nonloc::SymIntConstraintVal(C);
- }
-
- break;
-
- case loc::SymbolValKind: {
- if (isa<loc::ConcreteInt>(R)) {
-
- const SymIntConstraint& C =
- BasicVals.getConstraint(cast<loc::SymbolVal>(this)->getSymbol(),
- BinaryOperator::NE,
- cast<loc::ConcreteInt>(R).getValue());
-
- return nonloc::SymIntConstraintVal(C);
- }
-
- assert (!isa<loc::SymbolVal>(R) && "FIXME: Implement sym !=.");
-
- break;
- }
-
- case loc::MemRegionKind:
- if (isa<loc::MemRegionVal>(R)) {
- bool b = cast<loc::MemRegionVal>(*this)==cast<loc::MemRegionVal>(R);
- return NonLoc::MakeIntTruthVal(BasicVals, b);
- }
-
- break;
- }
-
- return NonLoc::MakeIntTruthVal(BasicVals, true);
-}
-
-//===----------------------------------------------------------------------===//
-// Utility methods for constructing Non-Locs.
-//===----------------------------------------------------------------------===//
-
-NonLoc NonLoc::MakeVal(BasicValueFactory& BasicVals, uint64_t X, QualType T) {
- return nonloc::ConcreteInt(BasicVals.getValue(X, T));
-}
-
-NonLoc NonLoc::MakeVal(BasicValueFactory& BasicVals, IntegerLiteral* I) {
-
- return nonloc::ConcreteInt(BasicVals.getValue(APSInt(I->getValue(),
- I->getType()->isUnsignedIntegerType())));
-}
-
-NonLoc NonLoc::MakeIntTruthVal(BasicValueFactory& BasicVals, bool b) {
- return nonloc::ConcreteInt(BasicVals.getTruthValue(b));
-}
-
-SVal SVal::GetSymbolValue(SymbolManager& SymMgr, VarDecl* D) {
-
- QualType T = D->getType();
-
- if (Loc::IsLocType(T))
- return loc::SymbolVal(SymMgr.getSymbol(D));
-
- return nonloc::SymbolVal(SymMgr.getSymbol(D));
-}
-
-//===----------------------------------------------------------------------===//
-// Utility methods for constructing Locs.
-//===----------------------------------------------------------------------===//
-
-Loc Loc::MakeVal(AddrLabelExpr* E) { return loc::GotoLabel(E->getLabel()); }
-
-Loc Loc::MakeVal(StringLiteral* S) {
- return loc::StringLiteralVal(S);
-}
-
-//===----------------------------------------------------------------------===//
-// Pretty-Printing.
-//===----------------------------------------------------------------------===//
-
-void SVal::printStdErr() const { print(*llvm::cerr.stream()); }
-
-void SVal::print(std::ostream& Out) const {
-
- switch (getBaseKind()) {
-
- case UnknownKind:
- Out << "Invalid"; break;
-
- case NonLocKind:
- cast<NonLoc>(this)->print(Out); break;
-
- case LocKind:
- cast<Loc>(this)->print(Out); break;
-
- case UndefinedKind:
- Out << "Undefined"; break;
-
- default:
- assert (false && "Invalid SVal.");
- }
-}
-
-static void printOpcode(std::ostream& Out, BinaryOperator::Opcode Op) {
-
- switch (Op) {
- case BinaryOperator::Mul: Out << '*' ; break;
- case BinaryOperator::Div: Out << '/' ; break;
- case BinaryOperator::Rem: Out << '%' ; break;
- case BinaryOperator::Add: Out << '+' ; break;
- case BinaryOperator::Sub: Out << '-' ; break;
- case BinaryOperator::Shl: Out << "<<" ; break;
- case BinaryOperator::Shr: Out << ">>" ; break;
- case BinaryOperator::LT: Out << "<" ; break;
- case BinaryOperator::GT: Out << '>' ; break;
- case BinaryOperator::LE: Out << "<=" ; break;
- case BinaryOperator::GE: Out << ">=" ; break;
- case BinaryOperator::EQ: Out << "==" ; break;
- case BinaryOperator::NE: Out << "!=" ; break;
- case BinaryOperator::And: Out << '&' ; break;
- case BinaryOperator::Xor: Out << '^' ; break;
- case BinaryOperator::Or: Out << '|' ; break;
-
- default: assert(false && "Not yet implemented.");
- }
-}
-
-void NonLoc::print(std::ostream& Out) const {
-
- switch (getSubKind()) {
-
- case nonloc::ConcreteIntKind:
- Out << cast<nonloc::ConcreteInt>(this)->getValue().getZExtValue();
-
- if (cast<nonloc::ConcreteInt>(this)->getValue().isUnsigned())
- Out << 'U';
-
- break;
-
- case nonloc::SymbolValKind:
- Out << '$' << cast<nonloc::SymbolVal>(this)->getSymbol();
- break;
-
- case nonloc::SymIntConstraintValKind: {
- const nonloc::SymIntConstraintVal& C =
- *cast<nonloc::SymIntConstraintVal>(this);
-
- Out << '$' << C.getConstraint().getSymbol() << ' ';
- printOpcode(Out, C.getConstraint().getOpcode());
- Out << ' ' << C.getConstraint().getInt().getZExtValue();
-
- if (C.getConstraint().getInt().isUnsigned())
- Out << 'U';
-
- break;
- }
-
- case nonloc::LocAsIntegerKind: {
- const nonloc::LocAsInteger& C = *cast<nonloc::LocAsInteger>(this);
- C.getLoc().print(Out);
- Out << " [as " << C.getNumBits() << " bit integer]";
- break;
- }
-
- default:
- assert (false && "Pretty-printed not implemented for this NonLoc.");
- break;
- }
-}
-
-void Loc::print(std::ostream& Out) const {
-
- switch (getSubKind()) {
-
- case loc::ConcreteIntKind:
- Out << cast<loc::ConcreteInt>(this)->getValue().getZExtValue()
- << " (Loc)";
- break;
-
- case loc::SymbolValKind:
- Out << '$' << cast<loc::SymbolVal>(this)->getSymbol();
- break;
-
- case loc::GotoLabelKind:
- Out << "&&"
- << cast<loc::GotoLabel>(this)->getLabel()->getID()->getName();
- break;
-
- case loc::MemRegionKind:
- Out << '&' << cast<loc::MemRegionVal>(this)->getRegion()->getString();
- break;
-
- case loc::FuncValKind:
- Out << "function "
- << cast<loc::FuncVal>(this)->getDecl()->getIdentifier()->getName();
- break;
-
- case loc::StringLiteralValKind:
- Out << "literal \""
- << cast<loc::StringLiteralVal>(this)->getLiteral()->getStrData()
- << "\"";
- break;
-
- default:
- assert (false && "Pretty-printing not implemented for this Loc.");
- break;
- }
-}
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