Factor this code out of llvm-prof

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11314 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/ProfileInfoLoader.h

@@ -0,0 +1,65 @@
+//===- ProfileInfoLoader.h - Load & convert profile information -*- C++ -*-===//
+// 
+//                      The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// The ProfileInfoLoader class is used to load and represent profiling
+// information read in from the dump file.  If conversions between formats are
+// needed, it can also do this.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_PROFILEINFOLOADER_H
+#define LLVM_ANALYSIS_PROFILEINFOLOADER_H
+
+#include <vector>
+#include <string>
+#include <utility>
+
+namespace llvm {
+
+class Module;
+class Function;
+class BasicBlock;
+
+class ProfileInfoLoader {
+  Module &M;
+  std::vector<std::string> CommandLines;
+  std::vector<unsigned>    FunctionCounts;
+  std::vector<unsigned>    BlockCounts;
+public:
+  // ProfileInfoLoader ctor - Read the specified profiling data file, exiting
+  // the program if the file is invalid or broken.
+  ProfileInfoLoader(const char *ToolName, const std::string &Filename,
+                    Module &M);
+
+  unsigned getNumExecutions() const { return CommandLines.size(); }
+  const std::string &getExecution(unsigned i) const { return CommandLines[i]; }
+
+  // getFunctionCounts - This method is used by consumers of function counting
+  // information.  If we do not directly have function count information, we
+  // compute it from other, more refined, types of profile information.
+  //
+  void getFunctionCounts(std::vector<std::pair<Function*, unsigned> > &Counts);
+
+  // hasAccurateBlockCounts - Return true if we can synthesize accurate block
+  // frequency information from whatever we have.
+  //
+  bool hasAccurateBlockCounts() const {
+    return !BlockCounts.empty();
+  }
+
+  // getBlockCounts - This method is used by consumers of block counting
+  // information.  If we do not directly have block count information, we
+  // compute it from other, more refined, types of profile information.
+  //
+  void getBlockCounts(std::vector<std::pair<BasicBlock*, unsigned> > &Counts);
+};
+
+} // End llvm namespace
+
+#endif