Rebased PNaCl localmods in LLVM to 223109

include/llvm/Bitcode/NaCl/NaClBitcodeBitsAndAbbrevsDist.h

+//===- NaClBitcodeBitsAndAbbrevsDist.h --------------------*- C++ -*-===//
+//     Maps distributions of values with corresponding number of bits,
+//     and percentage of abbreviations used in PNaCl bitcode records.
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Creates a distribution map of values and the
+// correspdonding bits and abbreviations in PNaCl bitcode records.
+
+#ifndef LLVM_BITCODE_NACL_NACLBITCODEBITSANDABBREVSDIST_H
+#define LLVM_BITCODE_NACL_NACLBITCODEBITSANDABBREVSDIST_H
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeBitsDist.h"
+
+namespace llvm {
+
+/// Defines the element type of a PNaCl bitcode distribution map when
+/// we want to count both the number of instances, and the number of
+/// bits used by each record. Also tracks the number to times an
+/// abbreviation was used to parse the corresponding record.
+class NaClBitcodeBitsAndAbbrevsDistElement : public NaClBitcodeBitsDistElement {
+  NaClBitcodeBitsAndAbbrevsDistElement(
+      const NaClBitcodeBitsAndAbbrevsDistElement&) LLVM_DELETED_FUNCTION;
+  void operator=(const NaClBitcodeBitsAndAbbrevsDistElement&)
+      LLVM_DELETED_FUNCTION;
+
+public:
+  static bool classof(const NaClBitcodeDistElement *Dist) {
+    return Dist->getKind() >= RDE_BitsAndAbbrevsDist
+        && Dist->getKind() < RDE_BitsAndAbbrevsDistLast;
+  }
+
+  // Create an element with no instances.
+  explicit NaClBitcodeBitsAndAbbrevsDistElement(
+      NaClBitcodeDistElementKind Kind=RDE_BitsAndAbbrevsDist)
+      : NaClBitcodeBitsDistElement(Kind),
+        NumAbbrevs(0)
+  {}
+
+  virtual ~NaClBitcodeBitsAndAbbrevsDistElement();
+
+  virtual void AddRecord(const NaClBitcodeRecord &Record);
+
+  // Note: No AddBlock method override because abbrevations only
+  // apply to records.
+
+  // Returns the number of times an abbreviation was used to represent
+  // the value.
+  unsigned GetNumAbbrevs() const {
+    return NumAbbrevs;
+  }
+
+  virtual void PrintStatsHeader(raw_ostream &Stream) const;
+
+  virtual void PrintRowStats(raw_ostream &Stream,
+                             const NaClBitcodeDist *Distribution) const;
+
+private:
+  // Number of times an abbreviation is used for the value.
+  unsigned NumAbbrevs;
+};
+
+}
+
+#endif