Rebased PNaCl localmods in LLVM to 223109

include/llvm/Bitcode/NaCl/NaClBitcodeBlockDist.h

+//===-- NaClBitcodeBlockDist.h -----------------------------------------===//
+//      Defines distribution maps for blocks within PNaCl bitcode.
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines a distribution map for blocks which tracks the number of bits
+// in each block, as well as the percentage of the file each bitcode block
+// ID holds.
+
+
+#ifndef LLVM_BITCODE_NACL_NACLBITCODEBLOCKDIST_H
+#define LLVM_BITCODE_NACL_NACLBITCODEBLOCKDIST_H
+
+#include "llvm/Bitcode/NaCl/NaClBitcodeBitsDist.h"
+
+namespace llvm {
+
+class NaClBitcodeBlockDistElement : public NaClBitcodeBitsDistElement {
+  NaClBitcodeBlockDistElement(const NaClBitcodeBlockDistElement&)
+  LLVM_DELETED_FUNCTION;
+  void operator=(const NaClBitcodeBlockDistElement&);
+
+public:
+  static bool classof(const NaClBitcodeDistElement *Element) {
+    return Element->getKind() >= RDE_BlockDist &&
+        Element->getKind() < RDE_BlockDistLast;
+  }
+
+  // Top-level constructor to create instances of this class.
+  explicit NaClBitcodeBlockDistElement(
+      NaClBitcodeDistElementKind Kind=RDE_BlockDist)
+      : NaClBitcodeBitsDistElement(Kind) {}
+
+  virtual ~NaClBitcodeBlockDistElement();
+
+  virtual NaClBitcodeDistElement *CreateElement(
+      NaClBitcodeDistValue Value) const;
+
+  // Sorts by %file, rather than number of instances.
+  virtual double GetImportance(NaClBitcodeDistValue value) const;
+
+  virtual const char *GetTitle() const;
+
+  virtual const char *GetValueHeader() const;
+
+  /// Prints out header for row of statistics associated with instances
+  /// of this distribution element.
+  virtual void PrintStatsHeader(raw_ostream &Stream) const;
+
+  /// Prints out statistics for the row with the given value.
+  virtual void PrintRowStats(raw_ostream &Stream,
+                             const NaClBitcodeDist *Distribution) const;
+
+  virtual void PrintRowValue(raw_ostream &Stream,
+                             NaClBitcodeDistValue Value,
+                             const NaClBitcodeDist *Distribution) const;
+};
+
+class NaClBitcodeBlockDist : public NaClBitcodeDist {
+  NaClBitcodeBlockDist(const NaClBitcodeBlockDist&) LLVM_DELETED_FUNCTION;
+  void operator=(const NaClBitcodeBlockDist&) LLVM_DELETED_FUNCTION;
+
+public:
+  static bool classof(const NaClBitcodeDist *Dist) {
+    return Dist->getKind() >= RD_BlockDist &&
+        Dist->getKind() < RD_BlockDistLast;
+  }
+
+  static NaClBitcodeBlockDistElement DefaultSentinal;
+
+  explicit NaClBitcodeBlockDist(
+      const NaClBitcodeBlockDistElement *Sentinal=&DefaultSentinal)
+      : NaClBitcodeDist(BlockStorage, Sentinal, RD_BlockDist)
+  {}
+
+  virtual ~NaClBitcodeBlockDist();
+
+  // Returns the total number of bits in all blocks in the distribution.
+  uint64_t GetTotalBits() const;
+
+  // Returns the printable name associated with the given BlockID.
+  //
+  // Note: If the name is not known, an "UnknownBlock" name is
+  // generated and returned.
+  static std::string GetName(unsigned BlockID);
+
+};
+
+}
+
+#endif