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
areEquivalentIndirectionValues(const Value & Val1,const Value & Val2)20 static bool areEquivalentIndirectionValues(const Value &Val1,
21 const Value &Val2) {
22 if (auto *IndVal1 = dyn_cast<PointerValue>(&Val1)) {
23 auto *IndVal2 = cast<PointerValue>(&Val2);
24 return &IndVal1->getPointeeLoc() == &IndVal2->getPointeeLoc();
25 }
26 return false;
27 }
28
areEquivalentValues(const Value & Val1,const Value & Val2)29 bool areEquivalentValues(const Value &Val1, const Value &Val2) {
30 if (&Val1 == &Val2)
31 return true;
32 if (Val1.getKind() != Val2.getKind())
33 return false;
34 // If values are distinct and have properties, we don't consider them equal,
35 // leaving equality up to the user model.
36 if (!Val1.properties().empty() || !Val2.properties().empty())
37 return false;
38 if (isa<TopBoolValue>(&Val1))
39 return true;
40 return areEquivalentIndirectionValues(Val1, Val2);
41 }
42
operator <<(raw_ostream & OS,const Value & Val)43 raw_ostream &operator<<(raw_ostream &OS, const Value &Val) {
44 switch (Val.getKind()) {
45 case Value::Kind::Integer:
46 return OS << "Integer(@" << &Val << ")";
47 case Value::Kind::Pointer:
48 return OS << "Pointer(" << &cast<PointerValue>(Val).getPointeeLoc() << ")";
49 case Value::Kind::TopBool:
50 return OS << "TopBool(" << cast<TopBoolValue>(Val).getAtom() << ")";
51 case Value::Kind::AtomicBool:
52 return OS << "AtomicBool(" << cast<AtomicBoolValue>(Val).getAtom() << ")";
53 case Value::Kind::FormulaBool:
54 return OS << "FormulaBool(" << cast<FormulaBoolValue>(Val).formula() << ")";
55 }
56 llvm_unreachable("Unknown clang::dataflow::Value::Kind enum");
57 }
58
59 } // namespace dataflow
60 } // namespace clang
61