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llvm-mirror/lib/Target/SparcV9/ModuloScheduling/MSchedGraphSB.h
Jeff Cohen 81980781a1 Eliminate tabs and trailing spaces.
llvm-svn: 22520
2005-07-27 05:53:44 +00:00

411 lines
16 KiB
C++

//===-- MSchedGraphSB.h - Scheduling Graph ------------------------*- 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.
//
//===----------------------------------------------------------------------===//
//
// A graph class for dependencies. This graph only contains true, anti, and
// output data dependencies for a vector of MachineBasicBlock. Dependencies
// across iterations are also computed. Unless data dependence analysis
// is provided, a conservative approach of adding dependencies between all
// loads and stores is taken. It also includes pseudo predicate nodes for
// modulo scheduling superblocks.
//===----------------------------------------------------------------------===//
#ifndef LLVM_MSCHEDGRAPHSB_H
#define LLVM_MSCHEDGRAPHSB_H
#include "DependenceAnalyzer.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetData.h"
#include "llvm/ADT/GraphTraits.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/iterator"
#include <vector>
namespace llvm {
class MSchedGraphSB;
class MSchedGraphSBNode;
template<class IteratorType, class NodeType>
class MSchedGraphSBNodeIterator;
//MSchedGraphSBEdge encapsulates the data dependence between nodes. It
//identifies the dependence type, on what, and the iteration
//difference
struct MSchedGraphSBEdge {
enum DataDepOrderType {
TrueDep, AntiDep, OutputDep, NonDataDep
};
enum MSchedGraphSBEdgeType {
MemoryDep, ValueDep, MachineRegister, PredDep
};
//Get or set edge data
MSchedGraphSBNode *getDest() const { return dest; }
unsigned getIteDiff() { return iteDiff; }
unsigned getDepOrderType() { return depOrderType; }
void setDest(MSchedGraphSBNode *newDest) { dest = newDest; }
private:
friend class MSchedGraphSBNode;
MSchedGraphSBEdge(MSchedGraphSBNode *destination, MSchedGraphSBEdgeType type,
unsigned deptype, unsigned diff)
: dest(destination), depType(type), depOrderType(deptype), iteDiff(diff) {}
MSchedGraphSBNode *dest;
MSchedGraphSBEdgeType depType;
unsigned depOrderType;
unsigned iteDiff;
};
//MSchedGraphSBNode represents a machine instruction and its
//corresponding latency. Each node also contains a list of its
//predecessors and sucessors.
class MSchedGraphSBNode {
const MachineInstr* Inst; //Machine Instruction
std::vector<const MachineInstr*> otherInstrs;
MSchedGraphSB* Parent; //Graph this node belongs to
unsigned index; //Index in BB
unsigned latency; //Latency of Instruction
bool isBranchInstr; //Is this node the branch instr or not
bool isPredicateNode; //Indicate if this node should be treated like a predicate
std::vector<MSchedGraphSBNode*> Predecessors; //Predecessor Nodes
std::vector<MSchedGraphSBEdge> Successors; //Successor edges
public:
MSchedGraphSBNode(const MachineInstr* inst, MSchedGraphSB *graph,
unsigned index, unsigned late=0, bool isBranch=false);
MSchedGraphSBNode(const MachineInstr* inst, std::vector<const MachineInstr*> &other,
MSchedGraphSB *graph,
unsigned index, unsigned late=0, bool isPNode=true);
MSchedGraphSBNode(const MSchedGraphSBNode &N);
//Iterators - Predecessor and Succussor
typedef std::vector<MSchedGraphSBNode*>::iterator pred_iterator;
pred_iterator pred_begin() { return Predecessors.begin(); }
pred_iterator pred_end() { return Predecessors.end(); }
unsigned pred_size() { return Predecessors.size(); }
typedef std::vector<MSchedGraphSBNode*>::const_iterator pred_const_iterator;
pred_const_iterator pred_begin() const { return Predecessors.begin(); }
pred_const_iterator pred_end() const { return Predecessors.end(); }
typedef MSchedGraphSBNodeIterator<std::vector<MSchedGraphSBEdge>::const_iterator,
const MSchedGraphSBNode> succ_const_iterator;
succ_const_iterator succ_begin() const;
succ_const_iterator succ_end() const;
typedef MSchedGraphSBNodeIterator<std::vector<MSchedGraphSBEdge>::iterator,
MSchedGraphSBNode> succ_iterator;
succ_iterator succ_begin();
succ_iterator succ_end();
unsigned succ_size() { return Successors.size(); }
//Get or set predecessor nodes, or successor edges
void setPredecessor(unsigned index, MSchedGraphSBNode *dest) {
Predecessors[index] = dest;
}
MSchedGraphSBNode* getPredecessor(unsigned index) {
return Predecessors[index];
}
MSchedGraphSBEdge* getSuccessor(unsigned index) {
return &Successors[index];
}
void deleteSuccessor(MSchedGraphSBNode *node) {
for (unsigned i = 0; i != Successors.size(); ++i)
if (Successors[i].getDest() == node) {
Successors.erase(Successors.begin()+i);
node->Predecessors.erase(std::find(node->Predecessors.begin(),
node->Predecessors.end(), this));
--i; //Decrease index var since we deleted a node
}
}
void addOutEdge(MSchedGraphSBNode *destination,
MSchedGraphSBEdge::MSchedGraphSBEdgeType type,
unsigned deptype, unsigned diff=0) {
Successors.push_back(MSchedGraphSBEdge(destination, type, deptype,diff));
destination->Predecessors.push_back(this);
}
//General methods to get and set data for the node
const MachineInstr* getInst() { return Inst; }
MSchedGraphSB* getParent() { return Parent; }
bool hasPredecessors() { return (Predecessors.size() > 0); }
bool hasSuccessors() { return (Successors.size() > 0); }
unsigned getLatency() { return latency; }
unsigned getLatency() const { return latency; }
unsigned getIndex() { return index; }
unsigned getIteDiff(MSchedGraphSBNode *succ);
MSchedGraphSBEdge getInEdge(MSchedGraphSBNode *pred);
unsigned getInEdgeNum(MSchedGraphSBNode *pred);
bool isSuccessor(MSchedGraphSBNode *);
bool isPredecessor(MSchedGraphSBNode *);
bool isBranch() { return isBranchInstr; }
bool isPredicate() { return isPredicateNode; }
bool isPredicate() const { return isPredicateNode; }
std::vector<const MachineInstr*> getOtherInstrs() { return otherInstrs; }
//Debug support
void print(std::ostream &os) const;
void setParent(MSchedGraphSB *p) { Parent = p; }
};
//Node iterator for graph generation
template<class IteratorType, class NodeType>
class MSchedGraphSBNodeIterator : public forward_iterator<NodeType*, ptrdiff_t> {
IteratorType I; // std::vector<MSchedGraphSBEdge>::iterator or const_iterator
public:
MSchedGraphSBNodeIterator(IteratorType i) : I(i) {}
bool operator==(const MSchedGraphSBNodeIterator RHS) const { return I == RHS.I; }
bool operator!=(const MSchedGraphSBNodeIterator RHS) const { return I != RHS.I; }
const MSchedGraphSBNodeIterator &operator=(const MSchedGraphSBNodeIterator &RHS) {
I = RHS.I;
return *this;
}
NodeType* operator*() const {
return I->getDest();
}
NodeType* operator->() const { return operator*(); }
MSchedGraphSBNodeIterator& operator++() { // Preincrement
++I;
return *this;
}
MSchedGraphSBNodeIterator operator++(int) { // Postincrement
MSchedGraphSBNodeIterator tmp = *this; ++*this; return tmp;
}
MSchedGraphSBEdge &getEdge() {
return *I;
}
const MSchedGraphSBEdge &getEdge() const {
return *I;
}
};
inline MSchedGraphSBNode::succ_const_iterator MSchedGraphSBNode::succ_begin() const {
return succ_const_iterator(Successors.begin());
}
inline MSchedGraphSBNode::succ_const_iterator MSchedGraphSBNode::succ_end() const {
return succ_const_iterator(Successors.end());
}
inline MSchedGraphSBNode::succ_iterator MSchedGraphSBNode::succ_begin() {
return succ_iterator(Successors.begin());
}
inline MSchedGraphSBNode::succ_iterator MSchedGraphSBNode::succ_end() {
return succ_iterator(Successors.end());
}
// ostream << operator for MSGraphNode class
inline std::ostream &operator<<(std::ostream &os,
const MSchedGraphSBNode &node) {
node.print(os);
return os;
}
// Provide specializations of GraphTraits to be able to use graph
// iterators on the scheduling graph!
//
template <> struct GraphTraits<MSchedGraphSBNode*> {
typedef MSchedGraphSBNode NodeType;
typedef MSchedGraphSBNode::succ_iterator ChildIteratorType;
static inline ChildIteratorType child_begin(NodeType *N) {
return N->succ_begin();
}
static inline ChildIteratorType child_end(NodeType *N) {
return N->succ_end();
}
static NodeType *getEntryNode(NodeType* N) { return N; }
};
//Graph class to represent dependence graph
class MSchedGraphSB {
std::vector<const MachineBasicBlock *> BBs; //Machine basic block
const TargetMachine &Target; //Target Machine
//Nodes
std::map<const MachineInstr*, MSchedGraphSBNode*> GraphMap;
//Add Nodes and Edges to this graph for our BB
typedef std::pair<int, MSchedGraphSBNode*> OpIndexNodePair;
void buildNodesAndEdges(std::map<const MachineInstr*, unsigned> &ignoreInstrs, DependenceAnalyzer &DA, std::map<MachineInstr*, Instruction*> &machineTollvm, std::map<MSchedGraphSBNode*, std::set<MachineInstr*> > &liveOutsideTrace);
void addValueEdges(std::vector<OpIndexNodePair> &NodesInMap,
MSchedGraphSBNode *node,
bool nodeIsUse, bool nodeIsDef, std::vector<const MachineInstr*> &phiInstrs, int diff=0);
void addMachRegEdges(std::map<int,
std::vector<OpIndexNodePair> >& regNumtoNodeMap);
void addMemEdges(const std::vector<MSchedGraphSBNode*>& memInst,
DependenceAnalyzer &DA, std::map<MachineInstr*, Instruction*> &machineTollvm);
bool instrCauseException(MachineOpCode opCode);
public:
MSchedGraphSB(const MachineBasicBlock *bb, const TargetMachine &targ,
std::map<const MachineInstr*, unsigned> &ignoreInstrs,
DependenceAnalyzer &DA, std::map<MachineInstr*, Instruction*> &machineTollvm);
//Copy constructor with maps to link old nodes to new nodes
MSchedGraphSB(const MSchedGraphSB &G, std::map<MSchedGraphSBNode*, MSchedGraphSBNode*> &newNodes);
MSchedGraphSB(std::vector<const MachineBasicBlock*> &bbs,
const TargetMachine &targ,
std::map<const MachineInstr*, unsigned> &ignoreInstrs,
DependenceAnalyzer &DA,
std::map<MachineInstr*, Instruction*> &machineTollvm);
//Print graph
void print(std::ostream &os) const;
//Deconstructor!
~MSchedGraphSB();
//Add or delete nodes from the Graph
void addNode(const MachineInstr* MI, MSchedGraphSBNode *node);
void deleteNode(MSchedGraphSBNode *node);
int totalDelay();
//iterators
typedef std::map<const MachineInstr*, MSchedGraphSBNode*>::iterator iterator;
typedef std::map<const MachineInstr*, MSchedGraphSBNode*>::const_iterator const_iterator;
typedef std::map<const MachineInstr*, MSchedGraphSBNode*>::reverse_iterator reverse_iterator;
iterator find(const MachineInstr* I) { return GraphMap.find(I); }
iterator end() { return GraphMap.end(); }
iterator begin() { return GraphMap.begin(); }
unsigned size() { return GraphMap.size(); }
reverse_iterator rbegin() { return GraphMap.rbegin(); }
reverse_iterator rend() { return GraphMap.rend(); }
//Get Target or original machine basic block
const TargetMachine* getTarget() { return &Target; }
std::vector<const MachineBasicBlock*> getBBs() { return BBs; }
};
// Provide specializations of GraphTraits to be able to use graph
// iterators on the scheduling graph
static MSchedGraphSBNode& getSecond(std::pair<const MachineInstr* const,
MSchedGraphSBNode*> &Pair) {
return *Pair.second;
}
template <> struct GraphTraits<MSchedGraphSB*> {
typedef MSchedGraphSBNode NodeType;
typedef MSchedGraphSBNode::succ_iterator ChildIteratorType;
static inline ChildIteratorType child_begin(NodeType *N) {
return N->succ_begin();
}
static inline ChildIteratorType child_end(NodeType *N) {
return N->succ_end();
}
typedef std::pointer_to_unary_function<std::pair<const MachineInstr* const,
MSchedGraphSBNode*>&, MSchedGraphSBNode&> DerefFun;
typedef mapped_iterator<MSchedGraphSB::iterator, DerefFun> nodes_iterator;
static nodes_iterator nodes_begin(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->begin(), DerefFun(getSecond));
}
static nodes_iterator nodes_end(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->end(), DerefFun(getSecond));
}
};
template <> struct GraphTraits<const MSchedGraphSB*> {
typedef const MSchedGraphSBNode NodeType;
typedef MSchedGraphSBNode::succ_const_iterator ChildIteratorType;
static inline ChildIteratorType child_begin(NodeType *N) {
return N->succ_begin();
}
static inline ChildIteratorType child_end(NodeType *N) {
return N->succ_end();
}
typedef std::pointer_to_unary_function<std::pair<const MachineInstr* const,
MSchedGraphSBNode*>&, MSchedGraphSBNode&> DerefFun;
typedef mapped_iterator<MSchedGraphSB::iterator, DerefFun> nodes_iterator;
static nodes_iterator nodes_begin(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->begin(), DerefFun(getSecond));
}
static nodes_iterator nodes_end(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->end(), DerefFun(getSecond));
}
};
template <> struct GraphTraits<Inverse<MSchedGraphSB*> > {
typedef MSchedGraphSBNode NodeType;
typedef MSchedGraphSBNode::pred_iterator ChildIteratorType;
static inline ChildIteratorType child_begin(NodeType *N) {
return N->pred_begin();
}
static inline ChildIteratorType child_end(NodeType *N) {
return N->pred_end();
}
typedef std::pointer_to_unary_function<std::pair<const MachineInstr* const,
MSchedGraphSBNode*>&, MSchedGraphSBNode&> DerefFun;
typedef mapped_iterator<MSchedGraphSB::iterator, DerefFun> nodes_iterator;
static nodes_iterator nodes_begin(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->begin(), DerefFun(getSecond));
}
static nodes_iterator nodes_end(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->end(), DerefFun(getSecond));
}
};
template <> struct GraphTraits<Inverse<const MSchedGraphSB*> > {
typedef const MSchedGraphSBNode NodeType;
typedef MSchedGraphSBNode::pred_const_iterator ChildIteratorType;
static inline ChildIteratorType child_begin(NodeType *N) {
return N->pred_begin();
}
static inline ChildIteratorType child_end(NodeType *N) {
return N->pred_end();
}
typedef std::pointer_to_unary_function<std::pair<const MachineInstr* const,
MSchedGraphSBNode*>&, MSchedGraphSBNode&> DerefFun;
typedef mapped_iterator<MSchedGraphSB::iterator, DerefFun> nodes_iterator;
static nodes_iterator nodes_begin(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->begin(), DerefFun(getSecond));
}
static nodes_iterator nodes_end(MSchedGraphSB *G) {
return map_iterator(((MSchedGraphSB*)G)->end(), DerefFun(getSecond));
}
};
}
#endif