Initial Commit

thirdparty/capstone/suite/synctools/tablegen/include/llvm/CodeGen/DwarfStringPoolEntry.h

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+//===- llvm/CodeGen/DwarfStringPoolEntry.h - String pool entry --*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H
+#define LLVM_CODEGEN_DWARFSTRINGPOOLENTRY_H
+
+#include "llvm/ADT/PointerIntPair.h"
+#include "llvm/ADT/StringMap.h"
+
+namespace llvm {
+
+class MCSymbol;
+
+/// Data for a string pool entry.
+struct DwarfStringPoolEntry {
+  static constexpr unsigned NotIndexed = -1;
+
+  MCSymbol *Symbol;
+  uint64_t Offset;
+  unsigned Index;
+
+  bool isIndexed() const { return Index != NotIndexed; }
+};
+
+/// String pool entry reference.
+class DwarfStringPoolEntryRef {
+  PointerIntPair<const StringMapEntry<DwarfStringPoolEntry> *, 1, bool>
+      MapEntryAndIndexed;
+
+  const StringMapEntry<DwarfStringPoolEntry> *getMapEntry() const {
+    return MapEntryAndIndexed.getPointer();
+  }
+
+public:
+  DwarfStringPoolEntryRef() = default;
+  DwarfStringPoolEntryRef(const StringMapEntry<DwarfStringPoolEntry> &Entry,
+                          bool Indexed)
+      : MapEntryAndIndexed(&Entry, Indexed) {}
+
+  explicit operator bool() const { return getMapEntry(); }
+  MCSymbol *getSymbol() const {
+    assert(getMapEntry()->second.Symbol && "No symbol available!");
+    return getMapEntry()->second.Symbol;
+  }
+  uint64_t getOffset() const { return getMapEntry()->second.Offset; }
+  bool isIndexed() const { return MapEntryAndIndexed.getInt(); }
+  unsigned getIndex() const {
+    assert(isIndexed());
+    assert(getMapEntry()->getValue().isIndexed());
+    return getMapEntry()->second.Index;
+  }
+  StringRef getString() const { return getMapEntry()->first(); }
+  /// Return the entire string pool entry for convenience.
+  DwarfStringPoolEntry getEntry() const { return getMapEntry()->getValue(); }
+
+  bool operator==(const DwarfStringPoolEntryRef &X) const {
+    return getMapEntry() == X.getMapEntry();
+  }
+  bool operator!=(const DwarfStringPoolEntryRef &X) const {
+    return getMapEntry() != X.getMapEntry();
+  }
+};
+
+} // end namespace llvm
+
+#endif