mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 03:30:28 +00:00
3b6b6ba4be
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8180 91177308-0d34-0410-b5e6-96231b3b80d8
131 lines
3.3 KiB
C++
131 lines
3.3 KiB
C++
//===- ModuloSchedGraph.cpp - Modulo Scheduling Graph and Set -*- C++ -*---===//
|
|
//
|
|
// Description here
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "ModuloSchedGraph.h"
|
|
#include "llvm/Type.h"
|
|
|
|
ModuloSchedGraphNode::ModuloSchedGraphNode(unsigned id, int index,
|
|
const Instruction *inst,
|
|
const TargetMachine &targ)
|
|
: SchedGraphNodeCommon(id, index), Inst(inst), Target(targ) {
|
|
}
|
|
|
|
void ModuloSchedGraphNode::print(std::ostream &os) const {
|
|
os << "Modulo Scheduling Node\n";
|
|
}
|
|
|
|
ModuloSchedGraph::ModuloSchedGraph(const BasicBlock *bb, const TargetMachine &targ)
|
|
: SchedGraphCommon(), BB(bb), Target(targ) {
|
|
|
|
assert(BB != NULL && "Basic Block is null");
|
|
|
|
//Builds nodes from each instruction in the basic block
|
|
buildNodesForBB();
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::buildNodesForBB() {
|
|
int count = 0;
|
|
for (BasicBlock::const_iterator i = BB->begin(), e = BB->end(); i != e; ++i) {
|
|
addNode(i,new ModuloSchedGraphNode(size(), count, i, Target));
|
|
count++;
|
|
}
|
|
|
|
//Get machine instruction(s) for the llvm instruction
|
|
//MachineCodeForInstruction &MC = MachineCodeForInstruction::get(Node->first);
|
|
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::addNode(const Instruction *I,
|
|
ModuloSchedGraphNode *node) {
|
|
assert(node!= NULL && "New ModuloSchedGraphNode is null");
|
|
GraphMap[I] = node;
|
|
}
|
|
|
|
void ModuloSchedGraph::addDepEdges() {
|
|
|
|
//Get Machine target information for calculating delay
|
|
const TargetInstrInfo &MTI = Target.getInstrInfo();
|
|
|
|
//Loop over instruction in BB and gather dependencies
|
|
for(BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
|
|
|
|
//Ignore instructions of the void type
|
|
if(I->getType() != Type::VoidTy) {
|
|
|
|
//Iterate over def-use chain and add true dependencies
|
|
for (Value::use_const_iterator U = I->use_begin(), e = I->use_end(); U != e;
|
|
++U) {
|
|
if (Instruction *Inst = dyn_cast<Instruction>(*U)) {
|
|
//Check if a node already exists for this instruction
|
|
ModuloSchedGraph::iterator Sink = find(Inst);
|
|
|
|
//If the instruction is in our graph, add appropriate edges
|
|
if(Sink->second != NULL) {
|
|
//assert if self loop
|
|
assert(&*I == Sink->first && "Use edge to itself!");
|
|
|
|
//Create edge and set delay equal to node latency
|
|
//FIXME: Is it safe to do this?
|
|
ModuloSchedGraph::iterator Src = find(I);
|
|
SchedGraphEdge *trueDep = new SchedGraphEdge(&*Src->second ,&*Sink->second,
|
|
&*I, SchedGraphEdge::TrueDep,
|
|
Src->second->getLatency());
|
|
//Determine the iteration difference
|
|
//FIXME: Will this ever happen?
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::ASAP() {
|
|
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::ALAP() {
|
|
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::MOB() {
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::ComputeDepth() {
|
|
|
|
}
|
|
|
|
void ModuloSchedGraph::ComputeHeight() {
|
|
|
|
}
|
|
|
|
void ModuloSchedGraphSet::addGraph(ModuloSchedGraph *graph) {
|
|
assert(graph!=NULL && "Graph for BasicBlock is null");
|
|
Graphs.push_back(graph);
|
|
}
|
|
|
|
|
|
ModuloSchedGraphSet::ModuloSchedGraphSet(const Function *F,
|
|
const TargetMachine &targ)
|
|
: function(F) {
|
|
|
|
//Create graph for each BB in this function
|
|
for (Function::const_iterator BI = F->begin(); BI != F->end(); ++BI)
|
|
addGraph(new ModuloSchedGraph(BI, targ));
|
|
}
|
|
|
|
ModuloSchedGraphSet::~ModuloSchedGraphSet(){
|
|
|
|
//delete all the graphs
|
|
}
|
|
|