Rebased PNaCl localmods in LLVM to 223109

include/llvm/Bitcode/NaCl/NaClBitcodeBitsDist.h

+//===- NaClBitcodeBitsDist.h ------------------------------------*- C++ -*-===//
+//     Maps distributions of values and corresponding number of
+//     bits 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 (nestable) distribution map of values, and the correspdonding
+// bits, in PNaCl bitcode records. These distributions are built directly
+// on top of the NaClBitcodeDistElement class.
+
+#ifndef LLVM_BITCODE_NACL_NACLBITCODEBITSDIST_H
+#define LLVM_BITCODE_NACL_NACLBITCODEBITSDIST_H
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeDist.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 NaClBitcodeBitsDistElement : public NaClBitcodeDistElement {
+  NaClBitcodeBitsDistElement(const NaClBitcodeBitsDistElement&)
+      LLVM_DELETED_FUNCTION;
+  void operator=(const NaClBitcodeBitsDistElement&)
+      LLVM_DELETED_FUNCTION;
+
+public:
+  static bool classof(const NaClBitcodeDistElement *Dist) {
+    return Dist->getKind() >= RDE_BitsDist
+        && Dist->getKind() < RDE_BitsDistLast;
+  }
+
+  // Create an element with no instances.
+  explicit NaClBitcodeBitsDistElement(
+      NaClBitcodeDistElementKind Kind=RDE_BitsDist)
+      : NaClBitcodeDistElement(Kind),
+        TotalBits(0)
+  {}
+
+  virtual ~NaClBitcodeBitsDistElement();
+
+  virtual void AddRecord(const NaClBitcodeRecord &Record);
+
+  virtual void AddBlock(const NaClBitcodeBlock &Block);
+
+  // Returns the total number of bits used to represent all instances
+  // of this value.
+  uint64_t GetTotalBits() const {
+    return TotalBits;
+  }
+
+  virtual void PrintStatsHeader(raw_ostream &Stream) const;
+
+  virtual void PrintRowStats(raw_ostream &Stream,
+                             const NaClBitcodeDist *Distribution) const;
+
+private:
+  // Number of bits used to represent all instances of the value.
+  uint64_t TotalBits;
+};
+
+}
+
+#endif