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Fixed bug in searchPath function for finding nodes between two recurrences.

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Changed dependence analyzer to only use dep distances of 2 or less.
This is experimental.

Changed MSchedGraph to be able to represent more then one BB (first steps).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21641 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tanya Lattner
2005-04-30 23:07:59 +00:00
parent 50d91d71a5
commit c50156360a
5 changed files with 215 additions and 183 deletions
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62
lib/Target/SparcV9/ModuloScheduling/ModuloScheduling.cpp
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@@ -1218,7 +1218,8 @@ void ModuloSchedulingPass::findAllReccurrences(MSchedGraphNode *node,
void ModuloSchedulingPass::searchPath(MSchedGraphNode *node,
std::vector<MSchedGraphNode*> &path,
std::set<MSchedGraphNode*> &nodesToAdd) {
std::set<MSchedGraphNode*> &nodesToAdd,
std::set<MSchedGraphNode*> &new_reccurrence) {
//Push node onto the path
path.push_back(node);
@@ -1227,23 +1228,32 @@ void ModuloSchedulingPass::searchPath(MSchedGraphNode *node,
for(MSchedGraphNode::succ_iterator S = node->succ_begin(), SE = node->succ_end(); S != SE;
++S) {
//If this node exists in a recurrence already in the partial order, then add all
//nodes in the path to the set of nodes to add
//Check if its already in our partial order, if not add it to the final vector
//Check if we should ignore this edge first
if(ignoreEdge(node,*S))
continue;
//check if successor is in this recurrence, we will get to it eventually
if(new_reccurrence.count(*S))
continue;
//If this node exists in a recurrence already in the partial
//order, then add all nodes in the path to the set of nodes to add
//Check if its already in our partial order, if not add it to the
//final vector
bool found = false;
for(std::vector<std::set<MSchedGraphNode*> >::iterator PO = partialOrder.begin(),
PE = partialOrder.end(); PO != PE; ++PO) {
//Check if we should ignore this edge first
if(ignoreEdge(node,*S))
continue;
if(PO->count(*S)) {
nodesToAdd.insert(*S);
}
//terminate
else
searchPath(*S, path, nodesToAdd);
found = true;
break;
}
}
if(!found) {
nodesToAdd.insert(*S);
searchPath(*S, path, nodesToAdd, new_reccurrence);
}
}
//Pop Node off the path
@@ -1344,7 +1354,7 @@ void ModuloSchedulingPass::computePartialOrder() {
//Add nodes that connect this recurrence to recurrences in the partial path
for(std::set<MSchedGraphNode*>::iterator N = new_recurrence.begin(),
NE = new_recurrence.end(); N != NE; ++N)
searchPath(*N, path, nodesToAdd);
searchPath(*N, path, nodesToAdd, new_recurrence);
//Add nodes to this recurrence if they are not already in the partial order
for(std::set<MSchedGraphNode*>::iterator N = nodesToAdd.begin(), NE = nodesToAdd.end();
@@ -1723,8 +1733,10 @@ bool ModuloSchedulingPass::computeSchedule(const MachineBasicBlock *BB, MSchedGr
E = FinalNodeOrder.end(); I != E; ++I) {
//CalculateEarly and Late start
int EarlyStart = -1;
int LateStart = 99999; //Set to something higher then we would ever expect (FIXME)
bool initialLSVal = false;
bool initialESVal = false;
int EarlyStart = 0;
int LateStart = 0;
bool hasSucc = false;
bool hasPred = false;
bool sched;
@@ -1751,7 +1763,12 @@ bool ModuloSchedulingPass::computeSchedule(const MachineBasicBlock *BB, MSchedGr
int ES_Temp = nodesByCycle->first + (*schedNode)->getLatency() - diff * II;
DEBUG(std::cerr << "Diff: " << diff << " Cycle: " << nodesByCycle->first << "\n");
DEBUG(std::cerr << "Temp EarlyStart: " << ES_Temp << " Prev EarlyStart: " << EarlyStart << "\n");
EarlyStart = std::max(EarlyStart, ES_Temp);
if(initialESVal)
EarlyStart = std::max(EarlyStart, ES_Temp);
else {
EarlyStart = ES_Temp;
initialESVal = true;
}
hasPred = true;
}
if((*I)->isSuccessor(*schedNode)) {
@@ -1759,7 +1776,12 @@ bool ModuloSchedulingPass::computeSchedule(const MachineBasicBlock *BB, MSchedGr
int LS_Temp = nodesByCycle->first - (*I)->getLatency() + diff * II;
DEBUG(std::cerr << "Diff: " << diff << " Cycle: " << nodesByCycle->first << "\n");
DEBUG(std::cerr << "Temp LateStart: " << LS_Temp << " Prev LateStart: " << LateStart << "\n");
LateStart = std::min(LateStart, LS_Temp);
if(initialLSVal)
LateStart = std::min(LateStart, LS_Temp);
else {
LateStart = LS_Temp;
initialLSVal = true;
}
hasSucc = true;
}
}
@@ -1772,7 +1794,7 @@ bool ModuloSchedulingPass::computeSchedule(const MachineBasicBlock *BB, MSchedGr
//Check if this node is a pred or succ to a branch, and restrict its placement
//even though the branch is not in the schedule
int count = branches.size();
/*int count = branches.size();
for(std::vector<MSchedGraphNode*>::iterator B = branches.begin(), BE = branches.end();
B != BE; ++B) {
if((*I)->isPredecessor(*B)) {
@@ -1794,7 +1816,7 @@ bool ModuloSchedulingPass::computeSchedule(const MachineBasicBlock *BB, MSchedGr
}
count--;
}
}*/
//Check if the node has no pred or successors and set Early Start to its ASAP
if(!hasSucc && !hasPred)