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//===-- SchedGraphCommon.h - Scheduling Base Graph ---------------*- C++ -*---=//
//
// A common graph class that is based on the SSA graph. It includes
// extra dependencies that are caused by machine resources.
//
//===-------------------------------------------------------------------------=//
#ifndef LLVM_CODEGEN_SCHEDGRAPHCOMMON_H
#define LLVM_CODEGEN_SCHEDGRAPHCOMMON_H
#include <iostream>
#include <vector>
#include "llvm/Value.h"
class SchedGraphEdge;
class SchedGraphNode;
/******************** Exported Data Types and Constants ********************/
typedef int ResourceId;
const ResourceId InvalidRID = -1;
const ResourceId MachineCCRegsRID = -2; // use +ve numbers for actual regs
const ResourceId MachineIntRegsRID = -3; // use +ve numbers for actual regs
const ResourceId MachineFPRegsRID = -4; // use +ve numbers for actual regs
//*********************** Public Class Declarations ************************/
class SchedGraphNodeCommon {
protected:
unsigned ID;
std::vector<SchedGraphEdge*> inEdges;
std::vector<SchedGraphEdge*> outEdges;
int latency;
friend std::ostream& operator<<(std::ostream& os, const SchedGraphNode& node);
public:
typedef std::vector<SchedGraphEdge*>:: iterator iterator;
typedef std::vector<SchedGraphEdge*>::const_iterator const_iterator;
typedef std::vector<SchedGraphEdge*>:: reverse_iterator reverse_iterator;
typedef std::vector<SchedGraphEdge*>::const_reverse_iterator const_reverse_iterator;
// Accessor methods
unsigned getNodeId () const { return ID; }
int getLatency () const { return latency; }
unsigned getNumInEdges () const { return inEdges.size(); }
unsigned getNumOutEdges () const { return outEdges.size(); }
// Iterators
iterator beginInEdges () { return inEdges.begin(); }
iterator endInEdges () { return inEdges.end(); }
iterator beginOutEdges () { return outEdges.begin(); }
iterator endOutEdges () { return outEdges.end(); }
const_iterator beginInEdges () const { return inEdges.begin(); }
const_iterator endInEdges () const { return inEdges.end(); }
const_iterator beginOutEdges () const { return outEdges.begin(); }
const_iterator endOutEdges () const { return outEdges.end(); }
// Debugging support
friend std::ostream& operator<<(std::ostream& os, const SchedGraphNodeCommon& node);
void dump (int indent=0) const;
protected:
friend class SchedGraph;
friend class SchedGraphCommon;
friend class SchedGraphEdge; // give access for adding edges
//friend class ModuloSchedGraph;
void addInEdge (SchedGraphEdge* edge);
void addOutEdge (SchedGraphEdge* edge);
void removeInEdge (const SchedGraphEdge* edge);
void removeOutEdge (const SchedGraphEdge* edge);
// disable default constructor and provide a ctor for single-block graphs
SchedGraphNodeCommon(); // DO NOT IMPLEMENT
SchedGraphNodeCommon(unsigned Id);
virtual ~SchedGraphNodeCommon();
};
class SchedGraphEdge {
public:
enum SchedGraphEdgeDepType {
CtrlDep, MemoryDep, ValueDep, MachineRegister, MachineResource
};
enum DataDepOrderType {
TrueDep = 0x1, AntiDep=0x2, OutputDep=0x4, NonDataDep=0x8
};
protected:
SchedGraphNodeCommon* src;
SchedGraphNodeCommon* sink;
SchedGraphEdgeDepType depType;
unsigned int depOrderType;
int minDelay; // cached latency (assumes fixed target arch)
int iteDiff;
union {
const Value* val;
int machineRegNum;
ResourceId resourceId;
};
public:
// For all constructors, if minDelay is unspecified, minDelay is
// set to _src->getLatency().
// constructor for CtrlDep or MemoryDep edges, selected by 3rd argument
/*ctor*/ SchedGraphEdge(SchedGraphNodeCommon* _src,
SchedGraphNodeCommon* _sink,
SchedGraphEdgeDepType _depType,
unsigned int _depOrderType,
int _minDelay = -1);
// constructor for explicit value dependence (may be true/anti/output)
/*ctor*/ SchedGraphEdge(SchedGraphNodeCommon* _src,
SchedGraphNodeCommon* _sink,
const Value* _val,
unsigned int _depOrderType,
int _minDelay = -1);
// constructor for machine register dependence
/*ctor*/ SchedGraphEdge(SchedGraphNodeCommon* _src,
SchedGraphNodeCommon* _sink,
unsigned int _regNum,
unsigned int _depOrderType,
int _minDelay = -1);
// constructor for any other machine resource dependences.
// DataDepOrderType is always NonDataDep. It it not an argument to
// avoid overloading ambiguity with previous constructor.
/*ctor*/ SchedGraphEdge(SchedGraphNodeCommon* _src,
SchedGraphNodeCommon* _sink,
ResourceId _resourceId,
int _minDelay = -1);
/*dtor*/ ~SchedGraphEdge();
SchedGraphNodeCommon* getSrc () const { return src; }
SchedGraphNodeCommon* getSink () const { return sink; }
int getMinDelay () const { return minDelay; }
SchedGraphEdgeDepType getDepType () const { return depType; }
const Value* getValue () const {
assert(depType == ValueDep); return val;
}
int getMachineReg () const {
assert(depType == MachineRegister); return machineRegNum;
}
int getResourceId () const {
assert(depType == MachineResource); return resourceId;
}
void setIteDiff (int _iteDiff) {
iteDiff = _iteDiff;
}
int getIteDiff (){
return iteDiff;
}
public:
//
// Debugging support
//
friend std::ostream& operator<<(std::ostream& os, const SchedGraphEdge& edge);
void dump (int indent=0) const;
private:
// disable default ctor
/*ctor*/ SchedGraphEdge(); // DO NOT IMPLEMENT
};
class SchedGraphCommon {
protected:
SchedGraphNodeCommon* graphRoot; // the root and leaf are not inserted
SchedGraphNodeCommon* graphLeaf; // in the hash_map (see getNumNodes())
public:
//
// Accessor methods
//
SchedGraphNodeCommon* getRoot() const { return graphRoot; }
SchedGraphNodeCommon* getLeaf() const { return graphLeaf; }
//
// Delete nodes or edges from the graph.
//
void eraseNode (SchedGraphNodeCommon* node);
void eraseIncomingEdges (SchedGraphNodeCommon* node,
bool addDummyEdges = true);
void eraseOutgoingEdges (SchedGraphNodeCommon* node,
bool addDummyEdges = true);
void eraseIncidentEdges (SchedGraphNodeCommon* node,
bool addDummyEdges = true);
/*ctor*/ SchedGraphCommon ();
/*dtor*/ ~SchedGraphCommon ();
};
#endif
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