--- /dev/null
+//===- llvm/Analysis/ProfileInfo.h - Profile Info Interface -----*- 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.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the generic ProfileInfo interface, which is used as the
+// common interface used by all clients of profiling information, and
+// implemented either by making static guestimations, or by actually reading in
+// profiling information gathered by running the program.
+//
+// Note that to be useful, all profile-based optimizations should preserve
+// ProfileInfo, which requires that they notify it when changes to the CFG are
+// made.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_PROFILEINFO_H
+#define LLVM_ANALYSIS_PROFILEINFO_H
+
+namespace llvm {
+ class BasicBlock;
+
+ struct ProfileInfo {
+ virtual ~ProfileInfo(); // We want to be subclassed
+
+ //===------------------------------------------------------------------===//
+ /// Profile Information Queries
+ ///
+ virtual unsigned getExecutionCount(BasicBlock *BB) = 0;
+
+ //===------------------------------------------------------------------===//
+ /// Analysis Update Methods
+ ///
+
+ };
+
+} // End llvm namespace
+
+#endif
--- /dev/null
+//===- ProfileInfo.cpp - Profile Info Interface ---------------------------===//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the abstract ProfileInfo interface, and the default
+// "no profile" implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/ProfileInfo.h"
+#include "llvm/Pass.h"
+using namespace llvm;
+
+// Register the AliasAnalysis interface, providing a nice name to refer to.
+namespace {
+ RegisterAnalysisGroup<ProfileInfo> Z("Profile Information");
+}
+
+ProfileInfo::~ProfileInfo() {}
+
+
+//===----------------------------------------------------------------------===//
+// NoProfile ProfileInfo implementation
+//
+
+namespace {
+ struct NoProfileInfo : public ImmutablePass, public ProfileInfo {
+ unsigned getExecutionCount(BasicBlock *BB) { return 0; }
+ };
+
+ // Register this pass...
+ RegisterOpt<NoProfileInfo>
+ X("no-profile", "No Profile Information");
+
+ // Declare that we implement the AliasAnalysis interface
+ RegisterAnalysisGroup<ProfileInfo, NoProfileInfo> Y;
+} // End of anonymous namespace