An initial implementation of an LLVM ProfileInfo class which is designed to

eventually allow Passes to use profiling information to direct them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11294 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 43 insertions, 0 deletions

diff --git a/include/llvm/Analysis/ProfileInfo.h b/include/llvm/Analysis/ProfileInfo.h
new file mode 100644
index 0000000000..4cdce4f97d
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+++ b/include/llvm/Analysis/ProfileInfo.h
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+//===- 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