| 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<PointerValue>(Val: &Val1)) { |
| 23 | auto *IndVal2 = cast<PointerValue>(Val: &Val2); |
| 24 | return &IndVal1->getPointeeLoc() == &IndVal2->getPointeeLoc(); |
| 25 | } |
| 26 | return false; |
| 27 | } |
| 28 | |
| 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>(Val: &Val1)) |
| 39 | return true; |
| 40 | return areEquivalentIndirectionValues(Val1, Val2); |
| 41 | } |
| 42 | |
| 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 |