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248 lines
9.0 KiB
C++
248 lines
9.0 KiB
C++
//===- llvm/Analysis/ProfileInfo.h - Profile Info Interface -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the generic ProfileInfo interface, which is used as the
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// common interface used by all clients of profiling information, and
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// implemented either by making static guestimations, or by actually reading in
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// profiling information gathered by running the program.
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//
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// Note that to be useful, all profile-based optimizations should preserve
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// ProfileInfo, which requires that they notify it when changes to the CFG are
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// made. (This is not implemented yet.)
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_PROFILEINFO_H
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#define LLVM_ANALYSIS_PROFILEINFO_H
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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#include <string>
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#include <map>
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#include <set>
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namespace llvm {
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class Pass;
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class raw_ostream;
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class BasicBlock;
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class Function;
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class MachineBasicBlock;
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class MachineFunction;
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// Helper for dumping edges to dbgs().
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raw_ostream& operator<<(raw_ostream &O, std::pair<const BasicBlock *, const BasicBlock *> E);
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raw_ostream& operator<<(raw_ostream &O, std::pair<const MachineBasicBlock *, const MachineBasicBlock *> E);
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raw_ostream& operator<<(raw_ostream &O, const BasicBlock *BB);
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raw_ostream& operator<<(raw_ostream &O, const MachineBasicBlock *MBB);
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raw_ostream& operator<<(raw_ostream &O, const Function *F);
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raw_ostream& operator<<(raw_ostream &O, const MachineFunction *MF);
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/// ProfileInfo Class - This class holds and maintains profiling
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/// information for some unit of code.
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template<class FType, class BType>
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class ProfileInfoT {
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public:
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// Types for handling profiling information.
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typedef std::pair<const BType*, const BType*> Edge;
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typedef std::pair<Edge, double> EdgeWeight;
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typedef std::map<Edge, double> EdgeWeights;
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typedef std::map<const BType*, double> BlockCounts;
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typedef std::map<const BType*, const BType*> Path;
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protected:
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// EdgeInformation - Count the number of times a transition between two
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// blocks is executed. As a special case, we also hold an edge from the
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// null BasicBlock to the entry block to indicate how many times the
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// function was entered.
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std::map<const FType*, EdgeWeights> EdgeInformation;
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// BlockInformation - Count the number of times a block is executed.
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std::map<const FType*, BlockCounts> BlockInformation;
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// FunctionInformation - Count the number of times a function is executed.
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std::map<const FType*, double> FunctionInformation;
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ProfileInfoT<MachineFunction, MachineBasicBlock> *MachineProfile;
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public:
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static char ID; // Class identification, replacement for typeinfo
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ProfileInfoT();
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~ProfileInfoT(); // We want to be subclassed
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// MissingValue - The value that is returned for execution counts in case
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// no value is available.
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static const double MissingValue;
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// getFunction() - Returns the Function for an Edge, checking for validity.
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static const FType* getFunction(Edge e) {
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if (e.first)
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return e.first->getParent();
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if (e.second)
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return e.second->getParent();
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llvm_unreachable("Invalid ProfileInfo::Edge");
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}
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// getEdge() - Creates an Edge from two BasicBlocks.
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static Edge getEdge(const BType *Src, const BType *Dest) {
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return std::make_pair(Src, Dest);
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}
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//===------------------------------------------------------------------===//
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/// Profile Information Queries
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///
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double getExecutionCount(const FType *F);
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double getExecutionCount(const BType *BB);
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void setExecutionCount(const BType *BB, double w);
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void addExecutionCount(const BType *BB, double w);
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double getEdgeWeight(Edge e) const {
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typename std::map<const FType*, EdgeWeights>::const_iterator J =
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EdgeInformation.find(getFunction(e));
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if (J == EdgeInformation.end()) return MissingValue;
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typename EdgeWeights::const_iterator I = J->second.find(e);
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if (I == J->second.end()) return MissingValue;
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return I->second;
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}
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void setEdgeWeight(Edge e, double w) {
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DEBUG_WITH_TYPE("profile-info",
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dbgs() << "Creating Edge " << e
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<< " (weight: " << format("%.20g",w) << ")\n");
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EdgeInformation[getFunction(e)][e] = w;
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}
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void addEdgeWeight(Edge e, double w);
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EdgeWeights &getEdgeWeights (const FType *F) {
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return EdgeInformation[F];
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}
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//===------------------------------------------------------------------===//
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/// Analysis Update Methods
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///
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void removeBlock(const BType *BB);
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void removeEdge(Edge e);
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void replaceEdge(const Edge &, const Edge &);
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enum GetPathMode {
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GetPathToExit = 1,
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GetPathToValue = 2,
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GetPathToDest = 4,
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GetPathWithNewEdges = 8
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};
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const BType *GetPath(const BType *Src, const BType *Dest,
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Path &P, unsigned Mode);
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void divertFlow(const Edge &, const Edge &);
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void splitEdge(const BType *FirstBB, const BType *SecondBB,
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const BType *NewBB, bool MergeIdenticalEdges = false);
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void splitBlock(const BType *Old, const BType* New);
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void splitBlock(const BType *BB, const BType* NewBB,
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BType *const *Preds, unsigned NumPreds);
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void replaceAllUses(const BType *RmBB, const BType *DestBB);
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void transfer(const FType *Old, const FType *New);
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void repair(const FType *F);
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void dump(FType *F = 0, bool real = true) {
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dbgs() << "**** This is ProfileInfo " << this << " speaking:\n";
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if (!real) {
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typename std::set<const FType*> Functions;
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dbgs() << "Functions: \n";
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if (F) {
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dbgs() << F << "@" << format("%p", F) << ": " << format("%.20g",getExecutionCount(F)) << "\n";
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Functions.insert(F);
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} else {
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for (typename std::map<const FType*, double>::iterator fi = FunctionInformation.begin(),
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fe = FunctionInformation.end(); fi != fe; ++fi) {
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dbgs() << fi->first << "@" << format("%p",fi->first) << ": " << format("%.20g",fi->second) << "\n";
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Functions.insert(fi->first);
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}
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}
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for (typename std::set<const FType*>::iterator FI = Functions.begin(), FE = Functions.end();
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FI != FE; ++FI) {
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const FType *F = *FI;
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typename std::map<const FType*, BlockCounts>::iterator bwi = BlockInformation.find(F);
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dbgs() << "BasicBlocks for Function " << F << ":\n";
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for (typename BlockCounts::const_iterator bi = bwi->second.begin(), be = bwi->second.end(); bi != be; ++bi) {
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dbgs() << bi->first << "@" << format("%p", bi->first) << ": " << format("%.20g",bi->second) << "\n";
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}
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}
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for (typename std::set<const FType*>::iterator FI = Functions.begin(), FE = Functions.end();
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FI != FE; ++FI) {
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typename std::map<const FType*, EdgeWeights>::iterator ei = EdgeInformation.find(*FI);
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dbgs() << "Edges for Function " << ei->first << ":\n";
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for (typename EdgeWeights::iterator ewi = ei->second.begin(), ewe = ei->second.end();
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ewi != ewe; ++ewi) {
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dbgs() << ewi->first << ": " << format("%.20g",ewi->second) << "\n";
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}
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}
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} else {
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assert(F && "No function given, this is not supported!");
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dbgs() << "Functions: \n";
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dbgs() << F << "@" << format("%p", F) << ": " << format("%.20g",getExecutionCount(F)) << "\n";
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dbgs() << "BasicBlocks for Function " << F << ":\n";
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for (typename FType::const_iterator BI = F->begin(), BE = F->end();
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BI != BE; ++BI) {
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const BType *BB = &(*BI);
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dbgs() << BB << "@" << format("%p", BB) << ": " << format("%.20g",getExecutionCount(BB)) << "\n";
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}
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}
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dbgs() << "**** ProfileInfo " << this << ", over and out.\n";
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}
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bool CalculateMissingEdge(const BType *BB, Edge &removed, bool assumeEmptyExit = false);
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bool EstimateMissingEdges(const BType *BB);
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ProfileInfoT<MachineFunction, MachineBasicBlock> *MI() {
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if (MachineProfile == 0)
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MachineProfile = new ProfileInfoT<MachineFunction, MachineBasicBlock>();
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return MachineProfile;
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}
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bool hasMI() const {
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return (MachineProfile != 0);
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}
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};
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typedef ProfileInfoT<Function, BasicBlock> ProfileInfo;
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typedef ProfileInfoT<MachineFunction, MachineBasicBlock> MachineProfileInfo;
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/// createProfileLoaderPass - This function returns a Pass that loads the
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/// profiling information for the module from the specified filename, making
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/// it available to the optimizers.
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Pass *createProfileLoaderPass(const std::string &Filename);
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} // End llvm namespace
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#endif
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