Added serialization support for APInt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43405 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/APInt.h

@@ -16,6 +16,7 @@
 #define LLVM_APINT_H
 
 #include "llvm/Support/DataTypes.h"
+#include "llvm/Bitcode/SerializationFwd.h"
 #include <cassert>
 #include <string>
 
@@ -203,6 +204,16 @@ public:
 
   /// @brief Destructor.
   ~APInt();
+  
+  /// Default constructor that creates an uninitialized APInt.  This is useful
+  ///  for object deserialization (pair this with the static method Read).
+  explicit APInt() {}
+  
+  /// @brief Used by the Bitcode serializer to emit APInts to Bitcode.
+  void Emit(Serializer& S) const;
+  
+  /// @brief Used by the Bitcode deserializer to deserialize APInts.
+  void Read(Deserializer& D);
 
   /// @}
   /// @name Value Tests

lib/Bitcode/Reader/DeserializeAPInt.cpp

@@ -0,0 +1,33 @@
+//===-- DeserializeAPInt.cpp - Deserialization for APInts ------*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Ted Kremenek and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements deserialization of APInts.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APInt.h"
+#include "llvm/Bitcode/Deserialize.h"
+#include <cassert>
+
+using namespace llvm;
+
+void APInt::Read(Deserializer& D) {
+  BitWidth = D.ReadInt();
+  
+  if (isSingleWord())
+    VAL = D.ReadInt();
+  else {
+    uint32_t NumWords = D.ReadInt();
+    assert (NumWords > 1);
+    pVal = new uint64_t[NumWords];
+    assert (pVal && "Allocation in deserialization of APInt failed.");
+    for (unsigned i = 0; i < NumWords; ++i)
+      pVal[i] = D.ReadInt();    
+  }
+}

lib/Bitcode/Writer/SerializeAPInt.cpp

@@ -0,0 +1,31 @@
+//===-- SerializeAPInt.cpp - Serialization for APInts ----------*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Ted Kremenek and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements serialization of APInts.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APInt.h"
+#include "llvm/Bitcode/Serialize.h"
+#include <cassert>
+
+using namespace llvm;
+
+void APInt::Emit(Serializer& S) const {
+  S.EmitInt(BitWidth);
+
+  if (isSingleWord())
+    S.EmitInt(VAL);
+  else {
+    uint32_t NumWords = getNumWords();
+    S.EmitInt(NumWords);
+    for (unsigned i = 0; i < NumWords; ++i)
+      S.EmitInt(pVal[i]);
+  }
+}