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
15namespace clang {
16namespace dataflow {
17
18static bool areEquivalentIndirectionValues(const Value &Val1,
19 const Value &Val2) {
20 if (auto *IndVal1 = dyn_cast<PointerValue>(Val: &Val1)) {
21 auto *IndVal2 = cast<PointerValue>(Val: &Val2);
22 return &IndVal1->getPointeeLoc() == &IndVal2->getPointeeLoc();
23 }
24 return false;
25}
26
27bool areEquivalentValues(const Value &Val1, const Value &Val2) {
28 if (&Val1 == &Val2)
29 return true;
30 if (Val1.getKind() != Val2.getKind())
31 return false;
32 // If values are distinct and have properties, we don't consider them equal,
33 // leaving equality up to the user model.
34 if (!Val1.properties().empty() || !Val2.properties().empty())
35 return false;
36 if (isa<TopBoolValue>(Val: &Val1))
37 return true;
38 return areEquivalentIndirectionValues(Val1, Val2);
39}
40
41raw_ostream &operator<<(raw_ostream &OS, const Value &Val) {
42 switch (Val.getKind()) {
43 case Value::Kind::Integer:
44 return OS << "Integer(@" << &Val << ")";
45 case Value::Kind::Pointer:
46 return OS << "Pointer(" << &cast<PointerValue>(Val).getPointeeLoc() << ")";
47 case Value::Kind::TopBool:
48 return OS << "TopBool(" << cast<TopBoolValue>(Val).getAtom() << ")";
49 case Value::Kind::AtomicBool:
50 return OS << "AtomicBool(" << cast<AtomicBoolValue>(Val).getAtom() << ")";
51 case Value::Kind::FormulaBool:
52 return OS << "FormulaBool(" << cast<FormulaBoolValue>(Val).formula() << ")";
53 }
54 llvm_unreachable("Unknown clang::dataflow::Value::Kind enum");
55}
56
57} // namespace dataflow
58} // namespace clang
59