-// $Id$
-//***************************************************************************
-// File:
-// SchedGraph.cpp
+//===- SchedGraph.cpp - Scheduling Graph Implementation -------------------===//
//
-// Purpose:
-// Scheduling graph based on SSA graph plus extra dependence edges
-// capturing dependences due to machine resources (machine registers,
-// CC registers, and any others).
+// 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.
//
-// History:
-// 7/20/01 - Vikram Adve - Created
-//**************************************************************************/
+//===----------------------------------------------------------------------===//
+//
+// Scheduling graph based on SSA graph plus extra dependence edges capturing
+// dependences due to machine resources (machine registers, CC registers, and
+// any others).
+//
+//===----------------------------------------------------------------------===//
#include "SchedGraph.h"
-#include "llvm/InstrTypes.h"
-#include "llvm/Instruction.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/Method.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/InstrSelection.h"
-#include "llvm/Target/MachineInstrInfo.h"
-#include "llvm/Target/MachineRegInfo.h"
-#include "llvm/iOther.h"
-#include "Support/StringExtras.h"
-#include <algorithm>
-#include <hash_map>
-#include <vector>
-
+#include "llvm/Function.h"
+#include "llvm/Instructions.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "../../Target/SparcV9/MachineCodeForInstruction.h"
+#include "../../Target/SparcV9/SparcV9RegInfo.h"
+#include "../../Target/SparcV9/SparcV9InstrInfo.h"
+#include "llvm/ADT/STLExtras.h"
+#include <iostream>
+
+namespace llvm {
//*********************** Internal Data Structures *************************/
// The following two types need to be classes, not typedefs, so we can use
// opaque declarations in SchedGraph.h
//
-struct RefVec: public vector< pair<SchedGraphNode*, int> > {
- typedef vector< pair<SchedGraphNode*, int> >:: iterator iterator;
- typedef vector< pair<SchedGraphNode*, int> >::const_iterator const_iterator;
+struct RefVec: public std::vector<std::pair<SchedGraphNode*, int> > {
+ typedef std::vector<std::pair<SchedGraphNode*,int> >::iterator iterator;
+ typedef
+ std::vector<std::pair<SchedGraphNode*,int> >::const_iterator const_iterator;
};
struct RegToRefVecMap: public hash_map<int, RefVec> {
typedef hash_map<int, RefVec>::const_iterator const_iterator;
};
-struct ValueToDefVecMap: public hash_map<const Instruction*, RefVec> {
- typedef hash_map<const Instruction*, RefVec>:: iterator iterator;
- typedef hash_map<const Instruction*, RefVec>::const_iterator const_iterator;
+struct ValueToDefVecMap: public hash_map<const Value*, RefVec> {
+ typedef hash_map<const Value*, RefVec>:: iterator iterator;
+ typedef hash_map<const Value*, RefVec>::const_iterator const_iterator;
};
-//
-// class SchedGraphEdge
-//
-
-/*ctor*/
-SchedGraphEdge::SchedGraphEdge(SchedGraphNode* _src,
- SchedGraphNode* _sink,
- SchedGraphEdgeDepType _depType,
- unsigned int _depOrderType,
- int _minDelay)
- : src(_src),
- sink(_sink),
- depType(_depType),
- depOrderType(_depOrderType),
- minDelay((_minDelay >= 0)? _minDelay : _src->getLatency()),
- val(NULL)
-{
- assert(src != sink && "Self-loop in scheduling graph!");
- src->addOutEdge(this);
- sink->addInEdge(this);
-}
-
-
-/*ctor*/
-SchedGraphEdge::SchedGraphEdge(SchedGraphNode* _src,
- SchedGraphNode* _sink,
- const Value* _val,
- unsigned int _depOrderType,
- int _minDelay)
- : src(_src),
- sink(_sink),
- depType(ValueDep),
- depOrderType(_depOrderType),
- minDelay((_minDelay >= 0)? _minDelay : _src->getLatency()),
- val(_val)
-{
- assert(src != sink && "Self-loop in scheduling graph!");
- src->addOutEdge(this);
- sink->addInEdge(this);
-}
-
-
-/*ctor*/
-SchedGraphEdge::SchedGraphEdge(SchedGraphNode* _src,
- SchedGraphNode* _sink,
- unsigned int _regNum,
- unsigned int _depOrderType,
- int _minDelay)
- : src(_src),
- sink(_sink),
- depType(MachineRegister),
- depOrderType(_depOrderType),
- minDelay((_minDelay >= 0)? _minDelay : _src->getLatency()),
- machineRegNum(_regNum)
-{
- assert(src != sink && "Self-loop in scheduling graph!");
- src->addOutEdge(this);
- sink->addInEdge(this);
-}
-
-
-/*ctor*/
-SchedGraphEdge::SchedGraphEdge(SchedGraphNode* _src,
- SchedGraphNode* _sink,
- ResourceId _resourceId,
- int _minDelay)
- : src(_src),
- sink(_sink),
- depType(MachineResource),
- depOrderType(NonDataDep),
- minDelay((_minDelay >= 0)? _minDelay : _src->getLatency()),
- resourceId(_resourceId)
-{
- assert(src != sink && "Self-loop in scheduling graph!");
- src->addOutEdge(this);
- sink->addInEdge(this);
-}
-
-/*dtor*/
-SchedGraphEdge::~SchedGraphEdge()
-{
-}
-
-void SchedGraphEdge::dump(int indent=0) const {
- cout << string(indent*2, ' ') << *this;
-}
-
//
// class SchedGraphNode
//
-/*ctor*/
-SchedGraphNode::SchedGraphNode(unsigned int _nodeId,
- const BasicBlock* _bb,
- const MachineInstr* _minstr,
- int indexInBB,
- const TargetMachine& target)
- : nodeId(_nodeId),
- bb(_bb),
- minstr(_minstr),
- origIndexInBB(indexInBB),
- latency(0)
-{
- if (minstr)
- {
- MachineOpCode mopCode = minstr->getOpCode();
- latency = target.getInstrInfo().hasResultInterlock(mopCode)
- ? target.getInstrInfo().minLatency(mopCode)
- : target.getInstrInfo().maxLatency(mopCode);
- }
-}
-
-
-/*dtor*/
-SchedGraphNode::~SchedGraphNode()
-{
-}
-
-void SchedGraphNode::dump(int indent=0) const {
- cout << string(indent*2, ' ') << *this;
-}
-
-
-inline void
-SchedGraphNode::addInEdge(SchedGraphEdge* edge)
-{
- inEdges.push_back(edge);
-}
-
-
-inline void
-SchedGraphNode::addOutEdge(SchedGraphEdge* edge)
-{
- outEdges.push_back(edge);
+SchedGraphNode::SchedGraphNode(unsigned NID, MachineBasicBlock *mbb,
+ int indexInBB, const TargetMachine& Target)
+ : SchedGraphNodeCommon(NID,indexInBB), MBB(mbb), MI(0) {
+ if (mbb) {
+ MachineBasicBlock::iterator I = MBB->begin();
+ std::advance(I, indexInBB);
+ MI = I;
+
+ MachineOpCode mopCode = MI->getOpcode();
+ latency = Target.getInstrInfo()->hasResultInterlock(mopCode)
+ ? Target.getInstrInfo()->minLatency(mopCode)
+ : Target.getInstrInfo()->maxLatency(mopCode);
+ }
}
-inline void
-SchedGraphNode::removeInEdge(const SchedGraphEdge* edge)
-{
- assert(edge->getSink() == this);
-
- for (iterator I = beginInEdges(); I != endInEdges(); ++I)
- if ((*I) == edge)
- {
- inEdges.erase(I);
- break;
- }
+//
+// Method: SchedGraphNode Destructor
+//
+// Description:
+// Free memory allocated by the SchedGraphNode object.
+//
+// Notes:
+// Do not delete the edges here. The base class will take care of that.
+// Only handle subclass specific stuff here (where currently there is
+// none).
+//
+SchedGraphNode::~SchedGraphNode() {
}
-inline void
-SchedGraphNode::removeOutEdge(const SchedGraphEdge* edge)
-{
- assert(edge->getSrc() == this);
-
- for (iterator I = beginOutEdges(); I != endOutEdges(); ++I)
- if ((*I) == edge)
- {
- outEdges.erase(I);
- break;
- }
-}
-
-
//
// class SchedGraph
//
-
-
-/*ctor*/
-SchedGraph::SchedGraph(const BasicBlock* bb,
- const TargetMachine& target)
-{
- bbVec.push_back(bb);
- this->buildGraph(target);
-}
-
-
-/*dtor*/
-SchedGraph::~SchedGraph()
-{
- for (iterator I=begin(); I != end(); ++I)
- {
- SchedGraphNode* node = (*I).second;
-
- // for each node, delete its out-edges
- for (SchedGraphNode::iterator I = node->beginOutEdges();
- I != node->endOutEdges(); ++I)
- delete *I;
-
- // then delete the node itself.
- delete node;
- }
-}
-
-
-void
-SchedGraph::dump() const
-{
- cout << " Sched Graph for Basic Blocks: ";
- for (unsigned i=0, N=bbVec.size(); i < N; i++)
- {
- cout << (bbVec[i]->hasName()? bbVec[i]->getName() : "block")
- << " (" << bbVec[i] << ")"
- << ((i == N-1)? "" : ", ");
- }
-
- cout << endl << endl << " Actual Root nodes : ";
- for (unsigned i=0, N=graphRoot->outEdges.size(); i < N; i++)
- cout << graphRoot->outEdges[i]->getSink()->getNodeId()
- << ((i == N-1)? "" : ", ");
-
- cout << endl << " Graph Nodes:" << endl;
- for (const_iterator I=begin(); I != end(); ++I)
- cout << endl << * (*I).second;
-
- cout << endl;
-}
-
-
-void
-SchedGraph::eraseIncomingEdges(SchedGraphNode* node, bool addDummyEdges)
-{
- // Delete and disconnect all in-edges for the node
- for (SchedGraphNode::iterator I = node->beginInEdges();
- I != node->endInEdges(); ++I)
- {
- SchedGraphNode* srcNode = (*I)->getSrc();
- srcNode->removeOutEdge(*I);
- delete *I;
-
- if (addDummyEdges &&
- srcNode != getRoot() &&
- srcNode->beginOutEdges() == srcNode->endOutEdges())
- { // srcNode has no more out edges, so add an edge to dummy EXIT node
- assert(node != getLeaf() && "Adding edge that was just removed?");
- (void) new SchedGraphEdge(srcNode, getLeaf(),
- SchedGraphEdge::CtrlDep, SchedGraphEdge::NonDataDep, 0);
- }
- }
-
- node->inEdges.clear();
-}
-
-void
-SchedGraph::eraseOutgoingEdges(SchedGraphNode* node, bool addDummyEdges)
-{
- // Delete and disconnect all out-edges for the node
- for (SchedGraphNode::iterator I = node->beginOutEdges();
- I != node->endOutEdges(); ++I)
- {
- SchedGraphNode* sinkNode = (*I)->getSink();
- sinkNode->removeInEdge(*I);
- delete *I;
-
- if (addDummyEdges &&
- sinkNode != getLeaf() &&
- sinkNode->beginInEdges() == sinkNode->endInEdges())
- { //sinkNode has no more in edges, so add an edge from dummy ENTRY node
- assert(node != getRoot() && "Adding edge that was just removed?");
- (void) new SchedGraphEdge(getRoot(), sinkNode,
- SchedGraphEdge::CtrlDep, SchedGraphEdge::NonDataDep, 0);
- }
- }
-
- node->outEdges.clear();
-}
-
-void
-SchedGraph::eraseIncidentEdges(SchedGraphNode* node, bool addDummyEdges)
-{
- this->eraseIncomingEdges(node, addDummyEdges);
- this->eraseOutgoingEdges(node, addDummyEdges);
+SchedGraph::SchedGraph(MachineBasicBlock &mbb, const TargetMachine& target)
+ : MBB(mbb) {
+ buildGraph(target);
+}
+
+//
+// Method: SchedGraph Destructor
+//
+// Description:
+// This method deletes memory allocated by the SchedGraph object.
+//
+// Notes:
+// Do not delete the graphRoot or graphLeaf here. The base class handles
+// that bit of work.
+//
+SchedGraph::~SchedGraph() {
+ for (const_iterator I = begin(); I != end(); ++I)
+ delete I->second;
+}
+
+void SchedGraph::dump() const {
+ std::cerr << " Sched Graph for Basic Block: "
+ << MBB.getBasicBlock()->getName()
+ << " (" << *MBB.getBasicBlock() << ")"
+ << "\n\n Actual Root nodes: ";
+ for (SchedGraphNodeCommon::const_iterator I = graphRoot->beginOutEdges(),
+ E = graphRoot->endOutEdges();
+ I != E; ++I) {
+ std::cerr << (*I)->getSink ()->getNodeId ();
+ if (I + 1 != E) { std::cerr << ", "; }
+ }
+ std::cerr << "\n Graph Nodes:\n";
+ for (const_iterator I = begin(), E = end(); I != E; ++I)
+ std::cerr << "\n" << *I->second;
+ std::cerr << "\n";
}
-
-void
-SchedGraph::addDummyEdges()
-{
- assert(graphRoot->outEdges.size() == 0);
+void SchedGraph::addDummyEdges() {
+ assert(graphRoot->getNumOutEdges() == 0);
- for (const_iterator I=begin(); I != end(); ++I)
- {
- SchedGraphNode* node = (*I).second;
- assert(node != graphRoot && node != graphLeaf);
- if (node->beginInEdges() == node->endInEdges())
- (void) new SchedGraphEdge(graphRoot, node, SchedGraphEdge::CtrlDep,
- SchedGraphEdge::NonDataDep, 0);
- if (node->beginOutEdges() == node->endOutEdges())
- (void) new SchedGraphEdge(node, graphLeaf, SchedGraphEdge::CtrlDep,
- SchedGraphEdge::NonDataDep, 0);
- }
+ for (const_iterator I=begin(); I != end(); ++I) {
+ SchedGraphNode* node = (*I).second;
+ assert(node != graphRoot && node != graphLeaf);
+ if (node->beginInEdges() == node->endInEdges())
+ (void) new SchedGraphEdge(graphRoot, node, SchedGraphEdge::CtrlDep,
+ SchedGraphEdge::NonDataDep, 0);
+ if (node->beginOutEdges() == node->endOutEdges())
+ (void) new SchedGraphEdge(node, graphLeaf, SchedGraphEdge::CtrlDep,
+ SchedGraphEdge::NonDataDep, 0);
+ }
}
-void
-SchedGraph::addCDEdges(const TerminatorInst* term,
- const TargetMachine& target)
-{
- const MachineInstrInfo& mii = target.getInstrInfo();
- MachineCodeForVMInstr& termMvec = term->getMachineInstrVec();
+void SchedGraph::addCDEdges(const TerminatorInst* term,
+ const TargetMachine& target) {
+ const TargetInstrInfo& mii = *target.getInstrInfo();
+ MachineCodeForInstruction &termMvec = MachineCodeForInstruction::get(term);
// Find the first branch instr in the sequence of machine instrs for term
//
unsigned first = 0;
- while (! mii.isBranch(termMvec[first]->getOpCode()))
+ while (! mii.isBranch(termMvec[first]->getOpcode()) &&
+ ! mii.isReturn(termMvec[first]->getOpcode()))
++first;
assert(first < termMvec.size() &&
- "No branch instructions for BR? Ok, but weird! Delete assertion.");
+ "No branch instructions for terminator? Ok, but weird!");
if (first == termMvec.size())
return;
- SchedGraphNode* firstBrNode = this->getGraphNodeForInstr(termMvec[first]);
+ SchedGraphNode* firstBrNode = getGraphNodeForInstr(termMvec[first]);
// Add CD edges from each instruction in the sequence to the
// *last preceding* branch instr. in the sequence
// Use a latency of 0 because we only need to prevent out-of-order issue.
//
- for (int i = (int) termMvec.size()-1; i > (int) first; i--)
- {
- SchedGraphNode* toNode = this->getGraphNodeForInstr(termMvec[i]);
- assert(toNode && "No node for instr generated for branch?");
-
- for (int j = i-1; j >= 0; j--)
- if (mii.isBranch(termMvec[j]->getOpCode()))
- {
- SchedGraphNode* brNode = this->getGraphNodeForInstr(termMvec[j]);
- assert(brNode && "No node for instr generated for branch?");
- (void) new SchedGraphEdge(brNode, toNode, SchedGraphEdge::CtrlDep,
- SchedGraphEdge::NonDataDep, 0);
- break; // only one incoming edge is enough
- }
- }
+ for (unsigned i = termMvec.size(); i > first+1; --i) {
+ SchedGraphNode* toNode = getGraphNodeForInstr(termMvec[i-1]);
+ assert(toNode && "No node for instr generated for branch/ret?");
+
+ for (unsigned j = i-1; j != 0; --j)
+ if (mii.isBranch(termMvec[j-1]->getOpcode()) ||
+ mii.isReturn(termMvec[j-1]->getOpcode())) {
+ SchedGraphNode* brNode = getGraphNodeForInstr(termMvec[j-1]);
+ assert(brNode && "No node for instr generated for branch/ret?");
+ (void) new SchedGraphEdge(brNode, toNode, SchedGraphEdge::CtrlDep,
+ SchedGraphEdge::NonDataDep, 0);
+ break; // only one incoming edge is enough
+ }
+ }
// Add CD edges from each instruction preceding the first branch
// to the first branch. Use a latency of 0 as above.
//
- for (int i = first-1; i >= 0; i--)
- {
- SchedGraphNode* fromNode = this->getGraphNodeForInstr(termMvec[i]);
- assert(fromNode && "No node for instr generated for branch?");
- (void) new SchedGraphEdge(fromNode, firstBrNode, SchedGraphEdge::CtrlDep,
- SchedGraphEdge::NonDataDep, 0);
- }
+ for (unsigned i = first; i != 0; --i) {
+ SchedGraphNode* fromNode = getGraphNodeForInstr(termMvec[i-1]);
+ assert(fromNode && "No node for instr generated for branch?");
+ (void) new SchedGraphEdge(fromNode, firstBrNode, SchedGraphEdge::CtrlDep,
+ SchedGraphEdge::NonDataDep, 0);
+ }
// Now add CD edges to the first branch instruction in the sequence from
// all preceding instructions in the basic block. Use 0 latency again.
//
- const BasicBlock* bb = firstBrNode->getBB();
- const MachineCodeForBasicBlock& mvec = bb->getMachineInstrVec();
- for (unsigned i=0, N=mvec.size(); i < N; i++)
- {
- if (mvec[i] == termMvec[first]) // reached the first branch
- break;
-
- SchedGraphNode* fromNode = this->getGraphNodeForInstr(mvec[i]);
- if (fromNode == NULL)
- continue; // dummy instruction, e.g., PHI
+ for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I){
+ if (&*I == termMvec[first]) // reached the first branch
+ break;
+
+ SchedGraphNode* fromNode = getGraphNodeForInstr(I);
+ if (fromNode == NULL)
+ continue; // dummy instruction, e.g., PHI
+
+ (void) new SchedGraphEdge(fromNode, firstBrNode,
+ SchedGraphEdge::CtrlDep,
+ SchedGraphEdge::NonDataDep, 0);
- (void) new SchedGraphEdge(fromNode, firstBrNode,
+ // If we find any other machine instructions (other than due to
+ // the terminator) that also have delay slots, add an outgoing edge
+ // from the instruction to the instructions in the delay slots.
+ //
+ unsigned d = mii.getNumDelaySlots(I->getOpcode());
+
+ MachineBasicBlock::iterator J = I; ++J;
+ for (unsigned j=1; j <= d; j++, ++J) {
+ SchedGraphNode* toNode = this->getGraphNodeForInstr(J);
+ assert(toNode && "No node for machine instr in delay slot?");
+ (void) new SchedGraphEdge(fromNode, toNode,
SchedGraphEdge::CtrlDep,
SchedGraphEdge::NonDataDep, 0);
-
- // If we find any other machine instructions (other than due to
- // the terminator) that also have delay slots, add an outgoing edge
- // from the instruction to the instructions in the delay slots.
- //
- unsigned d = mii.getNumDelaySlots(mvec[i]->getOpCode());
- assert(i+d < N && "Insufficient delay slots for instruction?");
-
- for (unsigned j=1; j <= d; j++)
- {
- SchedGraphNode* toNode = this->getGraphNodeForInstr(mvec[i+j]);
- assert(toNode && "No node for machine instr in delay slot?");
- (void) new SchedGraphEdge(fromNode, toNode,
- SchedGraphEdge::CtrlDep,
- SchedGraphEdge::NonDataDep, 0);
- }
}
+ }
}
static const int SG_LOAD_REF = 0;
static const unsigned int SG_DepOrderArray[][3] = {
{ SchedGraphEdge::NonDataDep,
- SchedGraphEdge::AntiDep,
- SchedGraphEdge::AntiDep },
+ SchedGraphEdge::AntiDep,
+ SchedGraphEdge::AntiDep },
{ SchedGraphEdge::TrueDep,
- SchedGraphEdge::OutputDep,
- SchedGraphEdge::TrueDep | SchedGraphEdge::OutputDep },
+ SchedGraphEdge::OutputDep,
+ SchedGraphEdge::TrueDep | SchedGraphEdge::OutputDep },
{ SchedGraphEdge::TrueDep,
- SchedGraphEdge::AntiDep | SchedGraphEdge::OutputDep,
- SchedGraphEdge::TrueDep | SchedGraphEdge::AntiDep
- | SchedGraphEdge::OutputDep }
+ SchedGraphEdge::AntiDep | SchedGraphEdge::OutputDep,
+ SchedGraphEdge::TrueDep | SchedGraphEdge::AntiDep
+ | SchedGraphEdge::OutputDep }
};
// Use latency 1 just to ensure that memory operations are ordered;
// latency does not otherwise matter (true dependences enforce that).
//
-void
-SchedGraph::addMemEdges(const vector<SchedGraphNode*>& memNodeVec,
- const TargetMachine& target)
-{
- const MachineInstrInfo& mii = target.getInstrInfo();
+void SchedGraph::addMemEdges(const std::vector<SchedGraphNode*>& memNodeVec,
+ const TargetMachine& target) {
+ const TargetInstrInfo& mii = *target.getInstrInfo();
// Instructions in memNodeVec are in execution order within the basic block,
// so simply look at all pairs <memNodeVec[i], memNodeVec[j: j > i]>.
//
- for (unsigned im=0, NM=memNodeVec.size(); im < NM; im++)
- {
- MachineOpCode fromOpCode = memNodeVec[im]->getOpCode();
- int fromType = mii.isCall(fromOpCode)? SG_CALL_REF
- : mii.isLoad(fromOpCode)? SG_LOAD_REF
- : SG_STORE_REF;
- for (unsigned jm=im+1; jm < NM; jm++)
- {
- MachineOpCode toOpCode = memNodeVec[jm]->getOpCode();
- int toType = mii.isCall(toOpCode)? SG_CALL_REF
- : mii.isLoad(toOpCode)? SG_LOAD_REF
- : SG_STORE_REF;
-
- if (fromType != SG_LOAD_REF || toType != SG_LOAD_REF)
- (void) new SchedGraphEdge(memNodeVec[im], memNodeVec[jm],
- SchedGraphEdge::MemoryDep,
- SG_DepOrderArray[fromType][toType], 1);
- }
+ for (unsigned im=0, NM=memNodeVec.size(); im < NM; im++) {
+ MachineOpCode fromOpCode = memNodeVec[im]->getOpcode();
+ int fromType = (mii.isCall(fromOpCode)? SG_CALL_REF
+ : (mii.isLoad(fromOpCode)? SG_LOAD_REF
+ : SG_STORE_REF));
+ for (unsigned jm=im+1; jm < NM; jm++) {
+ MachineOpCode toOpCode = memNodeVec[jm]->getOpcode();
+ int toType = (mii.isCall(toOpCode)? SG_CALL_REF
+ : (mii.isLoad(toOpCode)? SG_LOAD_REF
+ : SG_STORE_REF));
+
+ if (fromType != SG_LOAD_REF || toType != SG_LOAD_REF)
+ (void) new SchedGraphEdge(memNodeVec[im], memNodeVec[jm],
+ SchedGraphEdge::MemoryDep,
+ SG_DepOrderArray[fromType][toType], 1);
}
+ }
}
// Add edges from/to CC reg instrs to/from call instrs.
// Use a latency of 0 because we only need to prevent out-of-order issue,
// like with control dependences.
//
-void
-SchedGraph::addCallCCEdges(const vector<SchedGraphNode*>& memNodeVec,
- MachineCodeForBasicBlock& bbMvec,
- const TargetMachine& target)
-{
- const MachineInstrInfo& mii = target.getInstrInfo();
- vector<SchedGraphNode*> callNodeVec;
+void SchedGraph::addCallDepEdges(const std::vector<SchedGraphNode*>& callDepNodeVec,
+ const TargetMachine& target) {
+ const TargetInstrInfo& mii = *target.getInstrInfo();
+ // Instructions in memNodeVec are in execution order within the basic block,
+ // so simply look at all pairs <memNodeVec[i], memNodeVec[j: j > i]>.
+ //
+ for (unsigned ic=0, NC=callDepNodeVec.size(); ic < NC; ic++)
+ if (mii.isCall(callDepNodeVec[ic]->getOpcode())) {
+ // Add SG_CALL_REF edges from all preds to this instruction.
+ for (unsigned jc=0; jc < ic; jc++)
+ (void) new SchedGraphEdge(callDepNodeVec[jc], callDepNodeVec[ic],
+ SchedGraphEdge::MachineRegister,
+ MachineIntRegsRID, 0);
+
+ // And do the same from this instruction to all successors.
+ for (unsigned jc=ic+1; jc < NC; jc++)
+ (void) new SchedGraphEdge(callDepNodeVec[ic], callDepNodeVec[jc],
+ SchedGraphEdge::MachineRegister,
+ MachineIntRegsRID, 0);
+ }
+
+#ifdef CALL_DEP_NODE_VEC_CANNOT_WORK
// Find the call instruction nodes and put them in a vector.
+ std::vector<SchedGraphNode*> callNodeVec;
for (unsigned im=0, NM=memNodeVec.size(); im < NM; im++)
- if (mii.isCall(memNodeVec[im]->getOpCode()))
+ if (mii.isCall(memNodeVec[im]->getOpcode()))
callNodeVec.push_back(memNodeVec[im]);
// Now walk the entire basic block, looking for CC instructions *and*
//
int lastCallNodeIdx = -1;
for (unsigned i=0, N=bbMvec.size(); i < N; i++)
- if (mii.isCall(bbMvec[i]->getOpCode()))
- {
- ++lastCallNodeIdx;
- for ( ; lastCallNodeIdx < (int)callNodeVec.size(); ++lastCallNodeIdx)
- if (callNodeVec[lastCallNodeIdx]->getMachineInstr() == bbMvec[i])
- break;
- assert(lastCallNodeIdx < (int)callNodeVec.size() && "Missed Call?");
- }
- else if (mii.isCCInstr(bbMvec[i]->getOpCode()))
- { // Add incoming/outgoing edges from/to preceding/later calls
- SchedGraphNode* ccNode = this->getGraphNodeForInstr(bbMvec[i]);
- int j=0;
- for ( ; j <= lastCallNodeIdx; j++)
- (void) new SchedGraphEdge(callNodeVec[j], ccNode,
- MachineCCRegsRID, 0);
- for ( ; j < (int) callNodeVec.size(); j++)
- (void) new SchedGraphEdge(ccNode, callNodeVec[j],
- MachineCCRegsRID, 0);
- }
+ if (mii.isCall(bbMvec[i]->getOpcode())) {
+ ++lastCallNodeIdx;
+ for ( ; lastCallNodeIdx < (int)callNodeVec.size(); ++lastCallNodeIdx)
+ if (callNodeVec[lastCallNodeIdx]->getMachineInstr() == bbMvec[i])
+ break;
+ assert(lastCallNodeIdx < (int)callNodeVec.size() && "Missed Call?");
+ }
+ else if (mii.isCCInstr(bbMvec[i]->getOpcode())) {
+ // Add incoming/outgoing edges from/to preceding/later calls
+ SchedGraphNode* ccNode = this->getGraphNodeForInstr(bbMvec[i]);
+ int j=0;
+ for ( ; j <= lastCallNodeIdx; j++)
+ (void) new SchedGraphEdge(callNodeVec[j], ccNode,
+ MachineCCRegsRID, 0);
+ for ( ; j < (int) callNodeVec.size(); j++)
+ (void) new SchedGraphEdge(ccNode, callNodeVec[j],
+ MachineCCRegsRID, 0);
+ }
+#endif
}
-void
-SchedGraph::addMachineRegEdges(RegToRefVecMap& regToRefVecMap,
- const TargetMachine& target)
-{
- assert(bbVec.size() == 1 && "Only handling a single basic block here");
-
- // This assumes that such hardwired registers are never allocated
- // to any LLVM value (since register allocation happens later), i.e.,
- // any uses or defs of this register have been made explicit!
- // Also assumes that two registers with different numbers are
+void SchedGraph::addMachineRegEdges(RegToRefVecMap& regToRefVecMap,
+ const TargetMachine& target) {
+ // This code assumes that two registers with different numbers are
// not aliased!
//
for (RegToRefVecMap::iterator I = regToRefVecMap.begin();
- I != regToRefVecMap.end(); ++I)
- {
- int regNum = (*I).first;
- RefVec& regRefVec = (*I).second;
-
- // regRefVec is ordered by control flow order in the basic block
- for (unsigned i=0; i < regRefVec.size(); ++i)
- {
- SchedGraphNode* node = regRefVec[i].first;
- unsigned int opNum = regRefVec[i].second;
- bool isDef = node->getMachineInstr()->operandIsDefined(opNum);
-
- for (unsigned p=0; p < i; ++p)
- {
- SchedGraphNode* prevNode = regRefVec[p].first;
- if (prevNode != node)
- {
- unsigned int prevOpNum = regRefVec[p].second;
- bool prevIsDef =
- prevNode->getMachineInstr()->operandIsDefined(prevOpNum);
-
- if (isDef)
- new SchedGraphEdge(prevNode, node, regNum,
- (prevIsDef)? SchedGraphEdge::OutputDep
- : SchedGraphEdge::AntiDep);
- else if (prevIsDef)
- new SchedGraphEdge(prevNode, node, regNum,
- SchedGraphEdge::TrueDep);
- }
- }
+ I != regToRefVecMap.end(); ++I) {
+ int regNum = (*I).first;
+ RefVec& regRefVec = (*I).second;
+
+ // regRefVec is ordered by control flow order in the basic block
+ for (unsigned i=0; i < regRefVec.size(); ++i) {
+ SchedGraphNode* node = regRefVec[i].first;
+ unsigned int opNum = regRefVec[i].second;
+ const MachineOperand& mop =
+ node->getMachineInstr()->getExplOrImplOperand(opNum);
+ bool isDef = mop.isDef() && !mop.isUse();
+ bool isDefAndUse = mop.isDef() && mop.isUse();
+
+ for (unsigned p=0; p < i; ++p) {
+ SchedGraphNode* prevNode = regRefVec[p].first;
+ if (prevNode != node) {
+ unsigned int prevOpNum = regRefVec[p].second;
+ const MachineOperand& prevMop =
+ prevNode->getMachineInstr()->getExplOrImplOperand(prevOpNum);
+ bool prevIsDef = prevMop.isDef() && !prevMop.isUse();
+ bool prevIsDefAndUse = prevMop.isDef() && prevMop.isUse();
+ if (isDef) {
+ if (prevIsDef)
+ new SchedGraphEdge(prevNode, node, regNum,
+ SchedGraphEdge::OutputDep);
+ if (!prevIsDef || prevIsDefAndUse)
+ new SchedGraphEdge(prevNode, node, regNum,
+ SchedGraphEdge::AntiDep);
+ }
+
+ if (prevIsDef)
+ if (!isDef || isDefAndUse)
+ new SchedGraphEdge(prevNode, node, regNum,
+ SchedGraphEdge::TrueDep);
}
+ }
}
+ }
}
-void
-SchedGraph::addEdgesForValue(SchedGraphNode* refNode,
- const RefVec& defVec,
- const Value* defValue,
- bool refNodeIsDef,
- const TargetMachine& target)
-{
+// Adds dependences to/from refNode from/to all other defs
+// in the basic block. refNode may be a use, a def, or both.
+// We do not consider other uses because we are not building use-use deps.
+//
+void SchedGraph::addEdgesForValue(SchedGraphNode* refNode,
+ const RefVec& defVec,
+ const Value* defValue,
+ bool refNodeIsDef,
+ bool refNodeIsUse,
+ const TargetMachine& target) {
// Add true or output dep edges from all def nodes before refNode in BB.
// Add anti or output dep edges to all def nodes after refNode.
- for (RefVec::const_iterator I=defVec.begin(), E=defVec.end(); I != E; ++I)
- {
- if ((*I).first == refNode)
- continue; // Dont add any self-loops
-
- if ((*I).first->getOrigIndexInBB() < refNode->getOrigIndexInBB())
- // (*).first is before refNode
+ for (RefVec::const_iterator I=defVec.begin(), E=defVec.end(); I != E; ++I) {
+ if ((*I).first == refNode)
+ continue; // Dont add any self-loops
+
+ if ((*I).first->getOrigIndexInBB() < refNode->getOrigIndexInBB()) {
+ // (*).first is before refNode
+ if (refNodeIsDef && !refNodeIsUse)
(void) new SchedGraphEdge((*I).first, refNode, defValue,
- (refNodeIsDef)? SchedGraphEdge::OutputDep
- : SchedGraphEdge::TrueDep);
- else
- // (*).first is after refNode
+ SchedGraphEdge::OutputDep);
+ if (refNodeIsUse)
+ (void) new SchedGraphEdge((*I).first, refNode, defValue,
+ SchedGraphEdge::TrueDep);
+ } else {
+ // (*).first is after refNode
+ if (refNodeIsDef && !refNodeIsUse)
+ (void) new SchedGraphEdge(refNode, (*I).first, defValue,
+ SchedGraphEdge::OutputDep);
+ if (refNodeIsUse)
(void) new SchedGraphEdge(refNode, (*I).first, defValue,
- (refNodeIsDef)? SchedGraphEdge::OutputDep
- : SchedGraphEdge::AntiDep);
+ SchedGraphEdge::AntiDep);
}
+ }
}
-void
-SchedGraph::addEdgesForInstruction(const MachineInstr& minstr,
- const ValueToDefVecMap& valueToDefVecMap,
- const TargetMachine& target)
-{
- SchedGraphNode* node = this->getGraphNodeForInstr(&minstr);
+void SchedGraph::addEdgesForInstruction(const MachineInstr& MI,
+ const ValueToDefVecMap& valueToDefVecMap,
+ const TargetMachine& target) {
+ SchedGraphNode* node = getGraphNodeForInstr(&MI);
if (node == NULL)
return;
// Add edges for all operands of the machine instruction.
//
- for (unsigned i=0, numOps=minstr.getNumOperands(); i < numOps; i++)
- {
- const MachineOperand& mop = minstr.getOperand(i);
- switch(mop.getOperandType())
- {
- case MachineOperand::MO_VirtualRegister:
- case MachineOperand::MO_CCRegister:
- if (const Instruction* srcI =
- dyn_cast_or_null<Instruction>(mop.getVRegValue()))
- {
- ValueToDefVecMap::const_iterator I = valueToDefVecMap.find(srcI);
- if (I != valueToDefVecMap.end())
- addEdgesForValue(node, (*I).second, mop.getVRegValue(),
- minstr.operandIsDefined(i), target);
- }
- break;
-
- case MachineOperand::MO_MachineRegister:
- break;
-
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- case MachineOperand::MO_PCRelativeDisp:
- break; // nothing to do for immediate fields
-
- default:
- assert(0 && "Unknown machine operand type in SchedGraph builder");
- break;
- }
+ for (unsigned i = 0, numOps = MI.getNumOperands(); i != numOps; ++i) {
+ switch (MI.getOperand(i).getType()) {
+ case MachineOperand::MO_VirtualRegister:
+ case MachineOperand::MO_CCRegister:
+ if (const Value* srcI = MI.getOperand(i).getVRegValue()) {
+ ValueToDefVecMap::const_iterator I = valueToDefVecMap.find(srcI);
+ if (I != valueToDefVecMap.end())
+ addEdgesForValue(node, I->second, srcI,
+ MI.getOperand(i).isDef(), MI.getOperand(i).isUse(),
+ target);
+ }
+ break;
+
+ case MachineOperand::MO_MachineRegister:
+ break;
+
+ case MachineOperand::MO_SignExtendedImmed:
+ case MachineOperand::MO_UnextendedImmed:
+ case MachineOperand::MO_PCRelativeDisp:
+ case MachineOperand::MO_ConstantPoolIndex:
+ break; // nothing to do for immediate fields
+
+ default:
+ assert(0 && "Unknown machine operand type in SchedGraph builder");
+ break;
}
+ }
// Add edges for values implicitly used by the machine instruction.
// Examples include function arguments to a Call instructions or the return
// value of a Ret instruction.
//
- for (unsigned i=0, N=minstr.getNumImplicitRefs(); i < N; ++i)
- if (! minstr.implicitRefIsDefined(i))
- if (const Instruction* srcI =
- dyn_cast_or_null<Instruction>(minstr.getImplicitRef(i)))
- {
- ValueToDefVecMap::const_iterator I = valueToDefVecMap.find(srcI);
- if (I != valueToDefVecMap.end())
- addEdgesForValue(node, (*I).second, minstr.getImplicitRef(i),
- minstr.implicitRefIsDefined(i), target);
- }
-}
-
-
-#undef NEED_SEPARATE_NONSSA_EDGES_CODE
-#ifdef NEED_SEPARATE_NONSSA_EDGES_CODE
-void
-SchedGraph::addNonSSAEdgesForValue(const Instruction* instr,
- const TargetMachine& target)
-{
- if (isa<PHINode>(instr))
- return;
-
- MachineCodeForVMInstr& mvec = instr->getMachineInstrVec();
- const MachineInstrInfo& mii = target.getInstrInfo();
- RefVec refVec;
-
- for (unsigned i=0, N=mvec.size(); i < N; i++)
- for (int o=0, N = mii.getNumOperands(mvec[i]->getOpCode()); o < N; o++)
- {
- const MachineOperand& mop = mvec[i]->getOperand(o);
-
- if ((mop.getOperandType() == MachineOperand::MO_VirtualRegister ||
- mop.getOperandType() == MachineOperand::MO_CCRegister)
- && mop.getVRegValue() == (Value*) instr)
- {
- // this operand is a definition or use of value `instr'
- SchedGraphNode* node = this->getGraphNodeForInstr(mvec[i]);
- assert(node && "No node for machine instruction in this BB?");
- refVec.push_back(make_pair(node, o));
- }
+ for (unsigned i=0, N=MI.getNumImplicitRefs(); i < N; ++i)
+ if (MI.getImplicitOp(i).isUse())
+ if (const Value* srcI = MI.getImplicitRef(i)) {
+ ValueToDefVecMap::const_iterator I = valueToDefVecMap.find(srcI);
+ if (I != valueToDefVecMap.end())
+ addEdgesForValue(node, I->second, srcI,
+ MI.getImplicitOp(i).isDef(),
+ MI.getImplicitOp(i).isUse(), target);
}
-
- // refVec is ordered by control flow order of the machine instructions
- for (unsigned i=0; i < refVec.size(); ++i)
- {
- SchedGraphNode* node = refVec[i].first;
- unsigned int opNum = refVec[i].second;
- bool isDef = node->getMachineInstr()->operandIsDefined(opNum);
-
- if (isDef)
- // add output and/or anti deps to this definition
- for (unsigned p=0; p < i; ++p)
- {
- SchedGraphNode* prevNode = refVec[p].first;
- if (prevNode != node)
- {
- bool prevIsDef = prevNode->getMachineInstr()->
- operandIsDefined(refVec[p].second);
- new SchedGraphEdge(prevNode, node, SchedGraphEdge::ValueDep,
- (prevIsDef)? SchedGraphEdge::OutputDep
- : SchedGraphEdge::AntiDep);
- }
- }
- }
}
-#endif //NEED_SEPARATE_NONSSA_EDGES_CODE
-void
-SchedGraph::findDefUseInfoAtInstr(const TargetMachine& target,
- SchedGraphNode* node,
- vector<SchedGraphNode*>& memNodeVec,
- RegToRefVecMap& regToRefVecMap,
- ValueToDefVecMap& valueToDefVecMap)
-{
- const MachineInstrInfo& mii = target.getInstrInfo();
+void SchedGraph::findDefUseInfoAtInstr(const TargetMachine& target,
+ SchedGraphNode* node,
+ std::vector<SchedGraphNode*>& memNodeVec,
+ std::vector<SchedGraphNode*>& callDepNodeVec,
+ RegToRefVecMap& regToRefVecMap,
+ ValueToDefVecMap& valueToDefVecMap) {
+ const TargetInstrInfo& mii = *target.getInstrInfo();
+
+ MachineOpCode opCode = node->getOpcode();
+ if (mii.isCall(opCode) || mii.isCCInstr(opCode))
+ callDepNodeVec.push_back(node);
- MachineOpCode opCode = node->getOpCode();
if (mii.isLoad(opCode) || mii.isStore(opCode) || mii.isCall(opCode))
memNodeVec.push_back(node);
// Collect the register references and value defs. for explicit operands
//
- const MachineInstr& minstr = * node->getMachineInstr();
- for (int i=0, numOps = (int) minstr.getNumOperands(); i < numOps; i++)
- {
- const MachineOperand& mop = minstr.getOperand(i);
+ const MachineInstr& MI = *node->getMachineInstr();
+ for (int i=0, numOps = (int) MI.getNumOperands(); i < numOps; i++) {
+ const MachineOperand& mop = MI.getOperand(i);
+
+ // if this references a register other than the hardwired
+ // "zero" register, record the reference.
+ if (mop.hasAllocatedReg()) {
+ unsigned regNum = mop.getReg();
- // if this references a register other than the hardwired
- // "zero" register, record the reference.
- if (mop.getOperandType() == MachineOperand::MO_MachineRegister)
+ // If this is not a dummy zero register, record the reference in order
+ if (regNum != target.getRegInfo()->getZeroRegNum())
+ regToRefVecMap[mop.getReg()]
+ .push_back(std::make_pair(node, i));
+
+ // If this is a volatile register, add the instruction to callDepVec
+ // (only if the node is not already on the callDepVec!)
+ if (callDepNodeVec.size() == 0 || callDepNodeVec.back() != node)
{
- int regNum = mop.getMachineRegNum();
- if (regNum != target.getRegInfo().getZeroRegNum())
- regToRefVecMap[mop.getMachineRegNum()].push_back(make_pair(node,
- i));
- continue; // nothing more to do
- }
-
- // ignore all other non-def operands
- if (! minstr.operandIsDefined(i))
- continue;
-
- // We must be defining a value.
- assert((mop.getOperandType() == MachineOperand::MO_VirtualRegister ||
- mop.getOperandType() == MachineOperand::MO_CCRegister)
- && "Do not expect any other kind of operand to be defined!");
-
- const Instruction* defInstr = cast<Instruction>(mop.getVRegValue());
- valueToDefVecMap[defInstr].push_back(make_pair(node, i));
+ unsigned rcid;
+ int regInClass = target.getRegInfo()->getClassRegNum(regNum, rcid);
+ if (target.getRegInfo()->getMachineRegClass(rcid)
+ ->isRegVolatile(regInClass))
+ callDepNodeVec.push_back(node);
+ }
+
+ continue; // nothing more to do
}
+
+ // ignore all other non-def operands
+ if (!MI.getOperand(i).isDef())
+ continue;
+
+ // We must be defining a value.
+ assert((mop.getType() == MachineOperand::MO_VirtualRegister ||
+ mop.getType() == MachineOperand::MO_CCRegister)
+ && "Do not expect any other kind of operand to be defined!");
+ assert(mop.getVRegValue() != NULL && "Null value being defined?");
+
+ valueToDefVecMap[mop.getVRegValue()].push_back(std::make_pair(node, i));
+ }
//
- // Collect value defs. for implicit operands. The interface to extract
- // them assumes they must be virtual registers!
+ // Collect value defs. for implicit operands. They may have allocated
+ // physical registers also.
//
- for (int i=0, N = (int) minstr.getNumImplicitRefs(); i < N; ++i)
- if (minstr.implicitRefIsDefined(i))
- if (const Instruction* defInstr =
- dyn_cast_or_null<Instruction>(minstr.getImplicitRef(i)))
- {
- valueToDefVecMap[defInstr].push_back(make_pair(node, -i));
- }
+ for (unsigned i=0, N = MI.getNumImplicitRefs(); i != N; ++i) {
+ const MachineOperand& mop = MI.getImplicitOp(i);
+ if (mop.hasAllocatedReg()) {
+ unsigned regNum = mop.getReg();
+ if (regNum != target.getRegInfo()->getZeroRegNum())
+ regToRefVecMap[mop.getReg()]
+ .push_back(std::make_pair(node, i + MI.getNumOperands()));
+ continue; // nothing more to do
+ }
+
+ if (mop.isDef()) {
+ assert(MI.getImplicitRef(i) != NULL && "Null value being defined?");
+ valueToDefVecMap[MI.getImplicitRef(i)].push_back(
+ std::make_pair(node, -i));
+ }
+ }
}
-void
-SchedGraph::buildNodesforBB(const TargetMachine& target,
- const BasicBlock* bb,
- vector<SchedGraphNode*>& memNodeVec,
- RegToRefVecMap& regToRefVecMap,
- ValueToDefVecMap& valueToDefVecMap)
-{
- const MachineInstrInfo& mii = target.getInstrInfo();
+void SchedGraph::buildNodesForBB(const TargetMachine& target,
+ MachineBasicBlock& MBB,
+ std::vector<SchedGraphNode*>& memNodeVec,
+ std::vector<SchedGraphNode*>& callDepNodeVec,
+ RegToRefVecMap& regToRefVecMap,
+ ValueToDefVecMap& valueToDefVecMap) {
+ const TargetInstrInfo& mii = *target.getInstrInfo();
// Build graph nodes for each VM instruction and gather def/use info.
// Do both those together in a single pass over all machine instructions.
- const MachineCodeForBasicBlock& mvec = bb->getMachineInstrVec();
- for (unsigned i=0; i < mvec.size(); i++)
- if (! mii.isDummyPhiInstr(mvec[i]->getOpCode()))
- {
- SchedGraphNode* node = new SchedGraphNode(getNumNodes(), bb,
- mvec[i], i, target);
- this->noteGraphNodeForInstr(mvec[i], node);
-
- // Remember all register references and value defs
- findDefUseInfoAtInstr(target, node,
- memNodeVec, regToRefVecMap,valueToDefVecMap);
- }
-
-#undef REALLY_NEED_TO_SEARCH_SUCCESSOR_PHIS
-#ifdef REALLY_NEED_TO_SEARCH_SUCCESSOR_PHIS
- // This is a BIG UGLY HACK. IT NEEDS TO BE ELIMINATED.
- // Look for copy instructions inserted in this BB due to Phi instructions
- // in the successor BBs.
- // There MUST be exactly one copy per Phi in successor nodes.
- //
- for (BasicBlock::succ_const_iterator SI=bb->succ_begin(), SE=bb->succ_end();
- SI != SE; ++SI)
- for (BasicBlock::const_iterator PI=(*SI)->begin(), PE=(*SI)->end();
- PI != PE; ++PI)
- {
- if ((*PI)->getOpcode() != Instruction::PHINode)
- break; // No more Phis in this successor
-
- // Find the incoming value from block bb to block (*SI)
- int bbIndex = cast<PHINode>(*PI)->getBasicBlockIndex(bb);
- assert(bbIndex >= 0 && "But I know bb is a predecessor of (*SI)?");
- Value* inVal = cast<PHINode>(*PI)->getIncomingValue(bbIndex);
- assert(inVal != NULL && "There must be an in-value on every edge");
-
- // Find the machine instruction that makes a copy of inval to (*PI).
- // This must be in the current basic block (bb).
- const MachineCodeForVMInstr& mvec = (*PI)->getMachineInstrVec();
- const MachineInstr* theCopy = NULL;
- for (unsigned i=0; i < mvec.size() && theCopy == NULL; i++)
- if (! mii.isDummyPhiInstr(mvec[i]->getOpCode()))
- // not a Phi: assume this is a copy and examine its operands
- for (int o=0, N=(int) mvec[i]->getNumOperands(); o < N; o++)
- {
- const MachineOperand& mop = mvec[i]->getOperand(o);
- if (mvec[i]->operandIsDefined(o))
- assert(mop.getVRegValue() == (*PI) && "dest shd be my Phi");
- else if (mop.getVRegValue() == inVal)
- { // found the copy!
- theCopy = mvec[i];
- break;
- }
- }
-
- // Found the dang instruction. Now create a node and do the rest...
- if (theCopy != NULL)
- {
- SchedGraphNode* node = new SchedGraphNode(getNumNodes(), bb,
- theCopy, origIndexInBB++, target);
- this->noteGraphNodeForInstr(theCopy, node);
- findDefUseInfoAtInstr(target, node,
- memNodeVec, regToRefVecMap,valueToDefVecMap);
- }
- }
-#endif //REALLY_NEED_TO_SEARCH_SUCCESSOR_PHIS
+ unsigned i = 0;
+ for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E;
+ ++I, ++i)
+ if (I->getOpcode() != V9::PHI) {
+ SchedGraphNode* node = new SchedGraphNode(getNumNodes(), &MBB, i, target);
+ noteGraphNodeForInstr(I, node);
+
+ // Remember all register references and value defs
+ findDefUseInfoAtInstr(target, node, memNodeVec, callDepNodeVec,
+ regToRefVecMap, valueToDefVecMap);
+ }
}
-void
-SchedGraph::buildGraph(const TargetMachine& target)
-{
- const MachineInstrInfo& mii = target.getInstrInfo();
- const BasicBlock* bb = bbVec[0];
-
- assert(bbVec.size() == 1 && "Only handling a single basic block here");
-
+void SchedGraph::buildGraph(const TargetMachine& target) {
// Use this data structure to note all machine operands that compute
// ordinary LLVM values. These must be computed defs (i.e., instructions).
// Note that there may be multiple machine instructions that define
// Use this data structure to note all memory instructions.
// We use this to add memory dependence edges without a second full walk.
- //
- // vector<const Instruction*> memVec;
- vector<SchedGraphNode*> memNodeVec;
+ std::vector<SchedGraphNode*> memNodeVec;
+
+ // Use this data structure to note all instructions that access physical
+ // registers that can be modified by a call (including call instructions)
+ std::vector<SchedGraphNode*> callDepNodeVec;
// Use this data structure to note any uses or definitions of
// machine registers so we can add edges for those later without
RegToRefVecMap regToRefVecMap;
// Make a dummy root node. We'll add edges to the real roots later.
- graphRoot = new SchedGraphNode(0, NULL, NULL, -1, target);
- graphLeaf = new SchedGraphNode(1, NULL, NULL, -1, target);
+ graphRoot = new SchedGraphNode(0, NULL, -1, target);
+ graphLeaf = new SchedGraphNode(1, NULL, -1, target);
//----------------------------------------------------------------
// First add nodes for all the machine instructions in the basic block
// Do this one VM instruction at a time since the SchedGraphNode needs that.
// Also, remember the load/store instructions to add memory deps later.
//----------------------------------------------------------------
-
- buildNodesforBB(target, bb, memNodeVec, regToRefVecMap, valueToDefVecMap);
+
+ buildNodesForBB(target, MBB, memNodeVec, callDepNodeVec,
+ regToRefVecMap, valueToDefVecMap);
//----------------------------------------------------------------
// Now add edges for the following (all are incoming edges except (4)):
//
//----------------------------------------------------------------
- MachineCodeForBasicBlock& bbMvec = bb->getMachineInstrVec();
-
// First, add edges to the terminator instruction of the basic block.
- this->addCDEdges(bb->getTerminator(), target);
+ this->addCDEdges(MBB.getBasicBlock()->getTerminator(), target);
// Then add memory dep edges: store->load, load->store, and store->store.
// Call instructions are treated as both load and store.
this->addMemEdges(memNodeVec, target);
// Then add edges between call instructions and CC set/use instructions
- this->addCallCCEdges(memNodeVec, bbMvec, target);
+ this->addCallDepEdges(callDepNodeVec, target);
// Then add incoming def-use (SSA) edges for each machine instruction.
- for (unsigned i=0, N=bbMvec.size(); i < N; i++)
- addEdgesForInstruction(*bbMvec[i], valueToDefVecMap, target);
-
-#ifdef NEED_SEPARATE_NONSSA_EDGES_CODE
- // Then add non-SSA edges for all VM instructions in the block.
- // We assume that all machine instructions that define a value are
- // generated from the VM instruction corresponding to that value.
- // TODO: This could probably be done much more efficiently.
- for (BasicBlock::const_iterator II = bb->begin(); II != bb->end(); ++II)
- this->addNonSSAEdgesForValue(*II, target);
-#endif //NEED_SEPARATE_NONSSA_EDGES_CODE
-
+ for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I)
+ addEdgesForInstruction(*I, valueToDefVecMap, target);
+
// Then add edges for dependences on machine registers
this->addMachineRegEdges(regToRefVecMap, target);
-
+
// Finally, add edges from the dummy root and to dummy leaf
this->addDummyEdges();
}
//
// class SchedGraphSet
//
-
-/*ctor*/
-SchedGraphSet::SchedGraphSet(const Method* _method,
+SchedGraphSet::SchedGraphSet(const Function* _function,
const TargetMachine& target) :
- method(_method)
-{
- buildGraphsForMethod(method, target);
+ function(_function) {
+ buildGraphsForMethod(function, target);
}
-
-/*dtor*/
-SchedGraphSet::~SchedGraphSet()
-{
+SchedGraphSet::~SchedGraphSet() {
// delete all the graphs
- for (iterator I=begin(); I != end(); ++I)
- delete (*I).second;
+ for(iterator I = begin(), E = end(); I != E; ++I)
+ delete *I; // destructor is a friend
}
-void
-SchedGraphSet::dump() const
-{
- cout << "======== Sched graphs for method `"
- << (method->hasName()? method->getName() : "???")
- << "' ========" << endl << endl;
+void SchedGraphSet::dump() const {
+ std::cerr << "======== Sched graphs for function `" << function->getName()
+ << "' ========\n\n";
for (const_iterator I=begin(); I != end(); ++I)
- (*I).second->dump();
-
- cout << endl << "====== End graphs for method `"
- << (method->hasName()? method->getName() : "")
- << "' ========" << endl << endl;
-}
-
-
-void
-SchedGraphSet::buildGraphsForMethod(const Method *method,
- const TargetMachine& target)
-{
- for (Method::const_iterator BI = method->begin(); BI != method->end(); ++BI)
- {
- SchedGraph* graph = new SchedGraph(*BI, target);
- this->noteGraphForBlock(*BI, graph);
- }
-}
-
-
-
-ostream&
-operator<<(ostream& os, const SchedGraphEdge& edge)
-{
- os << "edge [" << edge.src->getNodeId() << "] -> ["
- << edge.sink->getNodeId() << "] : ";
-
- switch(edge.depType) {
- case SchedGraphEdge::CtrlDep: os<< "Control Dep"; break;
- case SchedGraphEdge::ValueDep: os<< "Reg Value " << edge.val; break;
- case SchedGraphEdge::MemoryDep: os<< "Memory Dep"; break;
- case SchedGraphEdge::MachineRegister: os<< "Reg " <<edge.machineRegNum;break;
- case SchedGraphEdge::MachineResource: os<<"Resource "<<edge.resourceId;break;
- default: assert(0); break;
+ (*I)->dump();
+
+ std::cerr << "\n====== End graphs for function `" << function->getName()
+ << "' ========\n\n";
+}
+
+
+void SchedGraphSet::buildGraphsForMethod(const Function *F,
+ const TargetMachine& target) {
+ MachineFunction &MF = MachineFunction::get(F);
+ for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
+ addGraph(new SchedGraph(*I, target));
+}
+
+
+void SchedGraphEdge::print(std::ostream &os) const {
+ os << "edge [" << src->getNodeId() << "] -> ["
+ << sink->getNodeId() << "] : ";
+
+ switch(depType) {
+ case SchedGraphEdge::CtrlDep:
+ os<< "Control Dep";
+ break;
+ case SchedGraphEdge::ValueDep:
+ os<< "Reg Value " << *val;
+ break;
+ case SchedGraphEdge::MemoryDep:
+ os<< "Memory Dep";
+ break;
+ case SchedGraphEdge::MachineRegister:
+ os<< "Reg " << machineRegNum;
+ break;
+ case SchedGraphEdge::MachineResource:
+ os<<"Resource "<< resourceId;
+ break;
+ default:
+ assert(0);
+ break;
}
- os << " : delay = " << edge.minDelay << endl;
-
- return os;
+ os << " : delay = " << minDelay << "\n";
}
-ostream&
-operator<<(ostream& os, const SchedGraphNode& node)
-{
- os << string(8, ' ')
- << "Node " << node.nodeId << " : "
- << "latency = " << node.latency << endl << string(12, ' ');
-
- if (node.getMachineInstr() == NULL)
- os << "(Dummy node)" << endl;
- else
- {
- os << *node.getMachineInstr() << endl << string(12, ' ');
- os << node.inEdges.size() << " Incoming Edges:" << endl;
- for (unsigned i=0, N=node.inEdges.size(); i < N; i++)
- os << string(16, ' ') << *node.inEdges[i];
+void SchedGraphNode::print(std::ostream &os) const {
+ os << std::string(8, ' ')
+ << "Node " << ID << " : "
+ << "latency = " << latency << "\n" << std::string(12, ' ');
- os << string(12, ' ') << node.outEdges.size()
- << " Outgoing Edges:" << endl;
- for (unsigned i=0, N=node.outEdges.size(); i < N; i++)
- {
- os << string(16, ' ') << * node.outEdges[i];
- }
- }
+ if (getMachineInstr() == NULL)
+ os << "(Dummy node)\n";
+ else {
+ os << *getMachineInstr() << "\n" << std::string(12, ' ');
+ os << inEdges.size() << " Incoming Edges:\n";
+ for (unsigned i=0, N = inEdges.size(); i < N; i++)
+ os << std::string(16, ' ') << *inEdges[i];
- return os;
+ os << std::string(12, ' ') << outEdges.size()
+ << " Outgoing Edges:\n";
+ for (unsigned i=0, N= outEdges.size(); i < N; i++)
+ os << std::string(16, ' ') << *outEdges[i];
+ }
}
+
+} // End llvm namespace
projects / oota-llvm.git / blobdiff