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move some simple scheduler methods into the simple scheduler

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26688 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-03-10 07:35:21 +00:00
parent 8c7ef0599c
commit e76074ab89
3 changed files with 266 additions and 264 deletions
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29
include/llvm/CodeGen/ScheduleDAG.h
View File

@ -347,44 +347,15 @@ namespace llvm {
/// ///
void EmitNoop(); void EmitNoop();
/// EmitAll - Emit all nodes in schedule sorted order.
///
void EmitAll();
/// Schedule - Order nodes according to selected style. /// Schedule - Order nodes according to selected style.
/// ///
virtual void Schedule() {} virtual void Schedule() {}
/// printNI - Print node info.
///
void printNI(std::ostream &O, NodeInfo *NI) const;
/// printChanges - Hilight changes in order caused by scheduling.
///
void printChanges(unsigned Index) const;
/// print - Print ordering to specified output stream.
///
void print(std::ostream &O) const;
void dump(const char *tag) const;
virtual void dump() const;
private: private:
void AddOperand(MachineInstr *MI, SDOperand Op, unsigned IIOpNum, void AddOperand(MachineInstr *MI, SDOperand Op, unsigned IIOpNum,
const TargetInstrDescriptor *II, const TargetInstrDescriptor *II,
std::map<SDNode*, unsigned> &VRBaseMap); std::map<SDNode*, unsigned> &VRBaseMap);
void AddToGroup(NodeInfo *D, NodeInfo *U);
protected:
/// PrepareNodeInfo - Set up the basic minimum node info for scheduling.
///
void PrepareNodeInfo();
/// IdentifyGroups - Put flagged nodes into groups.
///
void IdentifyGroups();
}; };
/// createSimpleDAGScheduler - This creates a simple two pass instruction /// createSimpleDAGScheduler - This creates a simple two pass instruction

235
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
View File

@ -52,47 +52,6 @@ static unsigned CountOperands(SDNode *Node) {
return N; return N;
} }
/// PrepareNodeInfo - Set up the basic minimum node info for scheduling.
///
void ScheduleDAG::PrepareNodeInfo() {
// Allocate node information
Info = new NodeInfo[NodeCount];
unsigned i = 0;
for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
E = DAG.allnodes_end(); I != E; ++I, ++i) {
// Fast reference to node schedule info
NodeInfo* NI = &Info[i];
// Set up map
Map[I] = NI;
// Set node
NI->Node = I;
// Set pending visit count
NI->setPending(I->use_size());
}
}
/// IdentifyGroups - Put flagged nodes into groups.
///
void ScheduleDAG::IdentifyGroups() {
for (unsigned i = 0, N = NodeCount; i < N; i++) {
NodeInfo* NI = &Info[i];
SDNode *Node = NI->Node;
// For each operand (in reverse to only look at flags)
for (unsigned N = Node->getNumOperands(); 0 < N--;) {
// Get operand
SDOperand Op = Node->getOperand(N);
// No more flags to walk
if (Op.getValueType() != MVT::Flag) break;
// Add to node group
AddToGroup(getNI(Op.Val), NI);
// Let everyone else know
HasGroups = true;
}
}
}
static unsigned CreateVirtualRegisters(MachineInstr *MI, static unsigned CreateVirtualRegisters(MachineInstr *MI,
unsigned NumResults, unsigned NumResults,
SSARegMap *RegMap, SSARegMap *RegMap,
@ -384,122 +343,6 @@ void ScheduleDAG::EmitNoop() {
TII->insertNoop(*BB, BB->end()); TII->insertNoop(*BB, BB->end());
} }
/// EmitAll - Emit all nodes in schedule sorted order.
///
void ScheduleDAG::EmitAll() {
std::map<SDNode*, unsigned> VRBaseMap;
// For each node in the ordering
for (unsigned i = 0, N = Ordering.size(); i < N; i++) {
// Get the scheduling info
NodeInfo *NI = Ordering[i];
if (NI->isInGroup()) {
NodeGroupIterator NGI(Ordering[i]);
while (NodeInfo *NI = NGI.next()) EmitNode(NI->Node, VRBaseMap);
} else {
EmitNode(NI->Node, VRBaseMap);
}
}
}
/// isFlagDefiner - Returns true if the node defines a flag result.
static bool isFlagDefiner(SDNode *A) {
unsigned N = A->getNumValues();
return N && A->getValueType(N - 1) == MVT::Flag;
}
/// isFlagUser - Returns true if the node uses a flag result.
///
static bool isFlagUser(SDNode *A) {
unsigned N = A->getNumOperands();
return N && A->getOperand(N - 1).getValueType() == MVT::Flag;
}
/// printNI - Print node info.
///
void ScheduleDAG::printNI(std::ostream &O, NodeInfo *NI) const {
#ifndef NDEBUG
SDNode *Node = NI->Node;
O << " "
<< std::hex << Node << std::dec
<< ", Lat=" << NI->Latency
<< ", Slot=" << NI->Slot
<< ", ARITY=(" << Node->getNumOperands() << ","
<< Node->getNumValues() << ")"
<< " " << Node->getOperationName(&DAG);
if (isFlagDefiner(Node)) O << "<#";
if (isFlagUser(Node)) O << ">#";
#endif
}
/// printChanges - Hilight changes in order caused by scheduling.
///
void ScheduleDAG::printChanges(unsigned Index) const {
#ifndef NDEBUG
// Get the ordered node count
unsigned N = Ordering.size();
// Determine if any changes
unsigned i = 0;
for (; i < N; i++) {
NodeInfo *NI = Ordering[i];
if (NI->Preorder != i) break;
}
if (i < N) {
std::cerr << Index << ". New Ordering\n";
for (i = 0; i < N; i++) {
NodeInfo *NI = Ordering[i];
std::cerr << " " << NI->Preorder << ". ";
printNI(std::cerr, NI);
std::cerr << "\n";
if (NI->isGroupDominator()) {
NodeGroup *Group = NI->Group;
for (NIIterator NII = Group->group_begin(), E = Group->group_end();
NII != E; NII++) {
std::cerr << " ";
printNI(std::cerr, *NII);
std::cerr << "\n";
}
}
}
} else {
std::cerr << Index << ". No Changes\n";
}
#endif
}
/// print - Print ordering to specified output stream.
///
void ScheduleDAG::print(std::ostream &O) const {
#ifndef NDEBUG
using namespace std;
O << "Ordering\n";
for (unsigned i = 0, N = Ordering.size(); i < N; i++) {
NodeInfo *NI = Ordering[i];
printNI(O, NI);
O << "\n";
if (NI->isGroupDominator()) {
NodeGroup *Group = NI->Group;
for (NIIterator NII = Group->group_begin(), E = Group->group_end();
NII != E; NII++) {
O << " ";
printNI(O, *NII);
O << "\n";
}
}
}
#endif
}
void ScheduleDAG::dump(const char *tag) const {
std::cerr << tag; dump();
}
void ScheduleDAG::dump() const {
print(std::cerr);
}
/// Run - perform scheduling. /// Run - perform scheduling.
/// ///
MachineBasicBlock *ScheduleDAG::Run() { MachineBasicBlock *ScheduleDAG::Run() {
@ -516,81 +359,3 @@ MachineBasicBlock *ScheduleDAG::Run() {
} }
/// CountInternalUses - Returns the number of edges between the two nodes.
///
static unsigned CountInternalUses(NodeInfo *D, NodeInfo *U) {
unsigned N = 0;
for (unsigned M = U->Node->getNumOperands(); 0 < M--;) {
SDOperand Op = U->Node->getOperand(M);
if (Op.Val == D->Node) N++;
}
return N;
}
//===----------------------------------------------------------------------===//
/// Add - Adds a definer and user pair to a node group.
///
void ScheduleDAG::AddToGroup(NodeInfo *D, NodeInfo *U) {
// Get current groups
NodeGroup *DGroup = D->Group;
NodeGroup *UGroup = U->Group;
// If both are members of groups
if (DGroup && UGroup) {
// There may have been another edge connecting
if (DGroup == UGroup) return;
// Add the pending users count
DGroup->addPending(UGroup->getPending());
// For each member of the users group
NodeGroupIterator UNGI(U);
while (NodeInfo *UNI = UNGI.next() ) {
// Change the group
UNI->Group = DGroup;
// For each member of the definers group
NodeGroupIterator DNGI(D);
while (NodeInfo *DNI = DNGI.next() ) {
// Remove internal edges
DGroup->addPending(-CountInternalUses(DNI, UNI));
}
}
// Merge the two lists
DGroup->group_insert(DGroup->group_end(),
UGroup->group_begin(), UGroup->group_end());
} else if (DGroup) {
// Make user member of definers group
U->Group = DGroup;
// Add users uses to definers group pending
DGroup->addPending(U->Node->use_size());
// For each member of the definers group
NodeGroupIterator DNGI(D);
while (NodeInfo *DNI = DNGI.next() ) {
// Remove internal edges
DGroup->addPending(-CountInternalUses(DNI, U));
}
DGroup->group_push_back(U);
} else if (UGroup) {
// Make definer member of users group
D->Group = UGroup;
// Add definers uses to users group pending
UGroup->addPending(D->Node->use_size());
// For each member of the users group
NodeGroupIterator UNGI(U);
while (NodeInfo *UNI = UNGI.next() ) {
// Remove internal edges
UGroup->addPending(-CountInternalUses(D, UNI));
}
UGroup->group_insert(UGroup->group_begin(), D);
} else {
D->Group = U->Group = DGroup = new NodeGroup();
DGroup->addPending(D->Node->use_size() + U->Node->use_size() -
CountInternalUses(D, U));
DGroup->group_push_back(D);
DGroup->group_push_back(U);
if (HeadNG == NULL)
HeadNG = DGroup;
if (TailNG != NULL)
TailNG->Next = DGroup;
TailNG = DGroup;
}
}

266
lib/CodeGen/SelectionDAG/ScheduleDAGSimple.cpp
View File

@ -20,6 +20,7 @@
#include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Support/Debug.h" #include "llvm/Support/Debug.h"
#include <algorithm> #include <algorithm>
#include <iostream>
using namespace llvm; using namespace llvm;
namespace { namespace {
@ -215,6 +216,35 @@ private:
bool isWeakDependency(NodeInfo *A, NodeInfo *B); bool isWeakDependency(NodeInfo *A, NodeInfo *B);
void ScheduleBackward(); void ScheduleBackward();
void ScheduleForward(); void ScheduleForward();
void AddToGroup(NodeInfo *D, NodeInfo *U);
/// PrepareNodeInfo - Set up the basic minimum node info for scheduling.
///
void PrepareNodeInfo();
/// IdentifyGroups - Put flagged nodes into groups.
///
void IdentifyGroups();
/// print - Print ordering to specified output stream.
///
void print(std::ostream &O) const;
void dump(const char *tag) const;
virtual void dump() const;
/// EmitAll - Emit all nodes in schedule sorted order.
///
void EmitAll();
/// printNI - Print node info.
///
void printNI(std::ostream &O, NodeInfo *NI) const;
/// printChanges - Hilight changes in order caused by scheduling.
///
void printChanges(unsigned Index) const;
}; };
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
@ -239,6 +269,242 @@ static InstrStage FloatStage = { 3, RSFloat };
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
/// PrepareNodeInfo - Set up the basic minimum node info for scheduling.
///
void ScheduleDAGSimple::PrepareNodeInfo() {
// Allocate node information
Info = new NodeInfo[NodeCount];
unsigned i = 0;
for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
E = DAG.allnodes_end(); I != E; ++I, ++i) {
// Fast reference to node schedule info
NodeInfo* NI = &Info[i];
// Set up map
Map[I] = NI;
// Set node
NI->Node = I;
// Set pending visit count
NI->setPending(I->use_size());
}
}
/// IdentifyGroups - Put flagged nodes into groups.
///
void ScheduleDAGSimple::IdentifyGroups() {
for (unsigned i = 0, N = NodeCount; i < N; i++) {
NodeInfo* NI = &Info[i];
SDNode *Node = NI->Node;
// For each operand (in reverse to only look at flags)
for (unsigned N = Node->getNumOperands(); 0 < N--;) {
// Get operand
SDOperand Op = Node->getOperand(N);
// No more flags to walk
if (Op.getValueType() != MVT::Flag) break;
// Add to node group
AddToGroup(getNI(Op.Val), NI);
// Let everyone else know
HasGroups = true;
}
}
}
/// CountInternalUses - Returns the number of edges between the two nodes.
///
static unsigned CountInternalUses(NodeInfo *D, NodeInfo *U) {
unsigned N = 0;
for (unsigned M = U->Node->getNumOperands(); 0 < M--;) {
SDOperand Op = U->Node->getOperand(M);
if (Op.Val == D->Node) N++;
}
return N;
}
//===----------------------------------------------------------------------===//
/// Add - Adds a definer and user pair to a node group.
///
void ScheduleDAGSimple::AddToGroup(NodeInfo *D, NodeInfo *U) {
// Get current groups
NodeGroup *DGroup = D->Group;
NodeGroup *UGroup = U->Group;
// If both are members of groups
if (DGroup && UGroup) {
// There may have been another edge connecting
if (DGroup == UGroup) return;
// Add the pending users count
DGroup->addPending(UGroup->getPending());
// For each member of the users group
NodeGroupIterator UNGI(U);
while (NodeInfo *UNI = UNGI.next() ) {
// Change the group
UNI->Group = DGroup;
// For each member of the definers group
NodeGroupIterator DNGI(D);
while (NodeInfo *DNI = DNGI.next() ) {
// Remove internal edges
DGroup->addPending(-CountInternalUses(DNI, UNI));
}
}
// Merge the two lists
DGroup->group_insert(DGroup->group_end(),
UGroup->group_begin(), UGroup->group_end());
} else if (DGroup) {
// Make user member of definers group
U->Group = DGroup;
// Add users uses to definers group pending
DGroup->addPending(U->Node->use_size());
// For each member of the definers group
NodeGroupIterator DNGI(D);
while (NodeInfo *DNI = DNGI.next() ) {
// Remove internal edges
DGroup->addPending(-CountInternalUses(DNI, U));
}
DGroup->group_push_back(U);
} else if (UGroup) {
// Make definer member of users group
D->Group = UGroup;
// Add definers uses to users group pending
UGroup->addPending(D->Node->use_size());
// For each member of the users group
NodeGroupIterator UNGI(U);
while (NodeInfo *UNI = UNGI.next() ) {
// Remove internal edges
UGroup->addPending(-CountInternalUses(D, UNI));
}
UGroup->group_insert(UGroup->group_begin(), D);
} else {
D->Group = U->Group = DGroup = new NodeGroup();
DGroup->addPending(D->Node->use_size() + U->Node->use_size() -
CountInternalUses(D, U));
DGroup->group_push_back(D);
DGroup->group_push_back(U);
if (HeadNG == NULL)
HeadNG = DGroup;
if (TailNG != NULL)
TailNG->Next = DGroup;
TailNG = DGroup;
}
}
/// print - Print ordering to specified output stream.
///
void ScheduleDAGSimple::print(std::ostream &O) const {
#ifndef NDEBUG
O << "Ordering\n";
for (unsigned i = 0, N = Ordering.size(); i < N; i++) {
NodeInfo *NI = Ordering[i];
printNI(O, NI);
O << "\n";
if (NI->isGroupDominator()) {
NodeGroup *Group = NI->Group;
for (NIIterator NII = Group->group_begin(), E = Group->group_end();
NII != E; NII++) {
O << " ";
printNI(O, *NII);
O << "\n";
}
}
}
#endif
}
void ScheduleDAGSimple::dump(const char *tag) const {
std::cerr << tag; dump();
}
void ScheduleDAGSimple::dump() const {
print(std::cerr);
}
/// EmitAll - Emit all nodes in schedule sorted order.
///
void ScheduleDAGSimple::EmitAll() {
std::map<SDNode*, unsigned> VRBaseMap;
// For each node in the ordering
for (unsigned i = 0, N = Ordering.size(); i < N; i++) {
// Get the scheduling info
NodeInfo *NI = Ordering[i];
if (NI->isInGroup()) {
NodeGroupIterator NGI(Ordering[i]);
while (NodeInfo *NI = NGI.next()) EmitNode(NI->Node, VRBaseMap);
} else {
EmitNode(NI->Node, VRBaseMap);
}
}
}
/// isFlagDefiner - Returns true if the node defines a flag result.
static bool isFlagDefiner(SDNode *A) {
unsigned N = A->getNumValues();
return N && A->getValueType(N - 1) == MVT::Flag;
}
/// isFlagUser - Returns true if the node uses a flag result.
///
static bool isFlagUser(SDNode *A) {
unsigned N = A->getNumOperands();
return N && A->getOperand(N - 1).getValueType() == MVT::Flag;
}
/// printNI - Print node info.
///
void ScheduleDAGSimple::printNI(std::ostream &O, NodeInfo *NI) const {
#ifndef NDEBUG
SDNode *Node = NI->Node;
O << " "
<< std::hex << Node << std::dec
<< ", Lat=" << NI->Latency
<< ", Slot=" << NI->Slot
<< ", ARITY=(" << Node->getNumOperands() << ","
<< Node->getNumValues() << ")"
<< " " << Node->getOperationName(&DAG);
if (isFlagDefiner(Node)) O << "<#";
if (isFlagUser(Node)) O << ">#";
#endif
}
/// printChanges - Hilight changes in order caused by scheduling.
///
void ScheduleDAGSimple::printChanges(unsigned Index) const {
#ifndef NDEBUG
// Get the ordered node count
unsigned N = Ordering.size();
// Determine if any changes
unsigned i = 0;
for (; i < N; i++) {
NodeInfo *NI = Ordering[i];
if (NI->Preorder != i) break;
}
if (i < N) {
std::cerr << Index << ". New Ordering\n";
for (i = 0; i < N; i++) {
NodeInfo *NI = Ordering[i];
std::cerr << " " << NI->Preorder << ". ";
printNI(std::cerr, NI);
std::cerr << "\n";
if (NI->isGroupDominator()) {
NodeGroup *Group = NI->Group;
for (NIIterator NII = Group->group_begin(), E = Group->group_end();
NII != E; NII++) {
std::cerr << " ";
printNI(std::cerr, *NII);
std::cerr << "\n";
}
}
}
} else {
std::cerr << Index << ". No Changes\n";
}
#endif
}
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
/// isDefiner - Return true if node A is a definer for B. /// isDefiner - Return true if node A is a definer for B.