Rebased PNaCl localmods in LLVM to 223109

include/llvm/Bitcode/NaCl/NaClCompressBlockDist.h

+//===-- NaClCompressBlockDist.h -------------------------------------------===//
+//      Defines distribution maps used to collect block and record
+//      distributions for tool 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_NACLCOMPRESSBLOCKDIST_H
+#define LLVM_BITCODE_NACL_NACLCOMPRESSBLOCKDIST_H
+
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeAbbrevDist.h"
+#include "llvm/Bitcode/NaCl/NaClBitcodeBlockDist.h"
+
+namespace llvm {
+
+/// Nests record distributions within the block they appear in,
+/// in a block distribution. The record distributions are refined
+/// by separating record codes that use the same abbreviation.
+class NaClCompressBlockDistElement : public NaClBitcodeBlockDistElement {
+public:
+  static bool classof(const NaClBitcodeDistElement *Element) {
+    return Element->getKind() >= RDE_PNaClCompressBlockDist
+        && Element->getKind() < RDE_PNaClCompressBlockDistLast;
+  }
+
+  explicit NaClCompressBlockDistElement(unsigned BlockID=0)
+      : NaClBitcodeBlockDistElement(RDE_PNaClCompressBlockDist),
+        AbbrevDist(BlockID) {
+    NestedDists.push_back(&AbbrevDist);
+  }
+
+  virtual ~NaClCompressBlockDistElement();
+
+  virtual NaClBitcodeDistElement*
+  CreateElement(NaClBitcodeDistValue Value) const;
+
+  virtual const SmallVectorImpl<NaClBitcodeDist*> *
+  GetNestedDistributions() const;
+
+  NaClBitcodeDist &GetAbbrevDist() {
+    return AbbrevDist;
+  }
+
+  // Sentinel for generating elements of this type.
+  static NaClCompressBlockDistElement Sentinel;
+
+private:
+  // Nested blocks used by GetNestedDistributions.
+  SmallVector<NaClBitcodeDist*, 1> NestedDists;
+
+  // The abbreviations/records associated with the corresponding block.
+  NaClBitcodeAbbrevDist AbbrevDist;
+};
+
+}
+
+#endif