1 //===-- Value.cpp -----------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines support functions for the `Value` type. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/Analysis/FlowSensitive/Value.h" 14 #include "clang/Analysis/FlowSensitive/DebugSupport.h" 15 #include "llvm/Support/Casting.h" 16 17 namespace clang { 18 namespace dataflow { 19 20 static bool areEquivalentIndirectionValues(const Value &Val1, 21 const Value &Val2) { 22 if (auto *IndVal1 = dyn_cast<ReferenceValue>(&Val1)) { 23 auto *IndVal2 = cast<ReferenceValue>(&Val2); 24 return &IndVal1->getReferentLoc() == &IndVal2->getReferentLoc(); 25 } 26 if (auto *IndVal1 = dyn_cast<PointerValue>(&Val1)) { 27 auto *IndVal2 = cast<PointerValue>(&Val2); 28 return &IndVal1->getPointeeLoc() == &IndVal2->getPointeeLoc(); 29 } 30 return false; 31 } 32 33 bool areEquivalentValues(const Value &Val1, const Value &Val2) { 34 return &Val1 == &Val2 || (Val1.getKind() == Val2.getKind() && 35 (isa<TopBoolValue>(&Val1) || 36 areEquivalentIndirectionValues(Val1, Val2))); 37 } 38 39 raw_ostream &operator<<(raw_ostream &OS, const Value &Val) { 40 switch (Val.getKind()) { 41 case Value::Kind::Reference: { 42 const auto *RV = cast<ReferenceValue>(&Val); 43 return OS << "Reference(" << &RV->getReferentLoc() << ")"; 44 } 45 case Value::Kind::Pointer: { 46 const auto *PV = dyn_cast<PointerValue>(&Val); 47 return OS << "Pointer(" << &PV->getPointeeLoc() << ")"; 48 } 49 // FIXME: support remaining cases. 50 default: 51 return OS << debugString(Val.getKind()); 52 } 53 } 54 55 } // namespace dataflow 56 } // namespace clang 57