Rebased PNaCl localmods in LLVM to 223109

include/llvm/Bitcode/NaCl/NaClCompressCodeDist.h

+//===-- NaClCompressCodeDist.h -------------------------------------------===//
+//      Defines distribution maps for record codes for pnacl-bccompress.
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_BITCODE_NACL_NACLCOMPRESSCODEDIST_H
+#define LLVM_BITCODE_NACL_NACLCOMPRESSCODEDIST_H
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeCodeDist.h"
+#include "llvm/Bitcode/NaCl/NaClBitcodeSizeDist.h"
+
+namespace llvm {
+
+/// Defines a record code distribution, with nested distributions separating
+/// the code distributions based on size and values.
+class NaClCompressCodeDistElement : public NaClBitcodeCodeDistElement {
+public:
+  static bool classof(const NaClBitcodeDistElement *Element) {
+    return Element->getKind() >= RDE_CompressCodeDist &&
+        Element->getKind() < RDE_CompressCodeDistLast;
+  }
+
+  NaClCompressCodeDistElement()
+      : NaClBitcodeCodeDistElement(RDE_CompressCodeDist),
+        SizeDist(NaClBitcodeDist::RecordStorage,
+                 &NaClBitcodeSizeDistElement::Sentinel) {
+    NestedDists.push_back(&SizeDist);
+  }
+
+  virtual ~NaClCompressCodeDistElement();
+
+  virtual NaClBitcodeDistElement *CreateElement(
+      NaClBitcodeDistValue Value) const;
+
+  virtual void AddRecord(const NaClBitcodeRecord &Record);
+
+  virtual const SmallVectorImpl<NaClBitcodeDist*> *
+  GetNestedDistributions() const;
+
+  NaClBitcodeDist &GetSizeDist() {
+    return SizeDist;
+  }
+
+  /// The sentinel used to generate instances of this in
+  /// a record code distribution map.
+  static NaClCompressCodeDistElement Sentinel;
+
+private:
+  // Nested blocks used by GetNestedDistributions.
+  SmallVector<NaClBitcodeDist*, 1> NestedDists;
+
+  /// The distribution of values, based on size.
+  NaClBitcodeDist SizeDist;
+};
+
+}
+
+#endif