1 files changed, 56 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Analysis/FlowSensitive/Value.cpp b/contrib/llvm-project/clang/lib/Analysis/FlowSensitive/Value.cpp
new file mode 100644
index 000000000000..59affa80bdce
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Analysis/FlowSensitive/Value.cpp
@@ -0,0 +1,56 @@
+//===-- Value.cpp -----------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines support functions for the `Value` type.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Analysis/FlowSensitive/Value.h"
+#include "clang/Analysis/FlowSensitive/DebugSupport.h"
+#include "llvm/Support/Casting.h"
+
+namespace clang {
+namespace dataflow {
+
+static bool areEquivalentIndirectionValues(const Value &Val1,
+                                           const Value &Val2) {
+  if (auto *IndVal1 = dyn_cast<ReferenceValue>(&Val1)) {
+    auto *IndVal2 = cast<ReferenceValue>(&Val2);
+    return &IndVal1->getReferentLoc() == &IndVal2->getReferentLoc();
+  }
+  if (auto *IndVal1 = dyn_cast<PointerValue>(&Val1)) {
+    auto *IndVal2 = cast<PointerValue>(&Val2);
+    return &IndVal1->getPointeeLoc() == &IndVal2->getPointeeLoc();
+  }
+  return false;
+}
+
+bool areEquivalentValues(const Value &Val1, const Value &Val2) {
+  return &Val1 == &Val2 || (Val1.getKind() == Val2.getKind() &&
+                            (isa<TopBoolValue>(&Val1) ||
+                             areEquivalentIndirectionValues(Val1, Val2)));
+}
+
+raw_ostream &operator<<(raw_ostream &OS, const Value &Val) {
+  switch (Val.getKind()) {
+  case Value::Kind::Reference: {
+    const auto *RV = cast<ReferenceValue>(&Val);
+    return OS << "Reference(" << &RV->getReferentLoc() << ")";
+  }
+  case Value::Kind::Pointer: {
+    const auto *PV = dyn_cast<PointerValue>(&Val);
+    return OS << "Pointer(" << &PV->getPointeeLoc() << ")";
+  }
+  // FIXME: support remaining cases.
+  default:
+    return OS << debugString(Val.getKind());
+  }
+}
+
+} // namespace dataflow
+} // namespace clang