mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
7d84dda560
from basic block counts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12241 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
//===- 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
|
|
|
|
#include <string>
|
|
#include <map>
|
|
|
|
namespace llvm {
|
|
class BasicBlock;
|
|
class Pass;
|
|
|
|
/// ProfileInfo Class - This class holds and maintains edge profiling
|
|
/// information for some unit of code.
|
|
class ProfileInfo {
|
|
protected:
|
|
// EdgeCounts - Count the number of times a transition between two blocks is
|
|
// executed. As a special case, we also hold an edge from the null
|
|
// BasicBlock to the entry block to indicate how many times the function was
|
|
// entered.
|
|
std::map<std::pair<BasicBlock*, BasicBlock*>, unsigned> EdgeCounts;
|
|
public:
|
|
virtual ~ProfileInfo(); // We want to be subclassed
|
|
|
|
//===------------------------------------------------------------------===//
|
|
/// Profile Information Queries
|
|
///
|
|
unsigned getExecutionCount(BasicBlock *BB) const;
|
|
|
|
unsigned getEdgeWeight(BasicBlock *Src, BasicBlock *Dest) const {
|
|
std::map<std::pair<BasicBlock*, BasicBlock*>, unsigned>::const_iterator I=
|
|
EdgeCounts.find(std::make_pair(Src, Dest));
|
|
return I != EdgeCounts.end() ? I->second : 0;
|
|
}
|
|
|
|
//===------------------------------------------------------------------===//
|
|
/// Analysis Update Methods
|
|
///
|
|
|
|
};
|
|
|
|
/// createProfileLoaderPass - This function returns a Pass that loads the
|
|
/// profiling information for the module from the specified filename, making
|
|
/// it available to the optimizers.
|
|
Pass *createProfileLoaderPass(const std::string &Filename);
|
|
} // End llvm namespace
|
|
|
|
#endif
|