first Version of Loop Unrolling
This commit is contained in:
parent
be3904a256
commit
5e6e0e6c90
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@ -7,13 +7,13 @@
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{
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{
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"type": "lldb",
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"type": "lldb",
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"request": "launch",
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"request": "launch",
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"name": "LLDB cnt",
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"name": "LLDB Unrolling",
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"program": "/usr/bin/opt",
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"program": "/usr/bin/opt",
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"args": [
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"args": [
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"-load-pass-plugin",
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"-load-pass-plugin",
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"${workspaceFolder}/build/libCacheAnalysisPass.so",
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"${workspaceFolder}/build/libCacheAnalysisPass.so",
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"-passes=lru-misses",
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"-passes=lru-misses",
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"${workspaceFolder}/test/cnt.ll",
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"${workspaceFolder}/test/fft1.ll",
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"-o",
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"-o",
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"/dev/null"
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"/dev/null"
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],
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],
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@ -56,6 +56,7 @@ struct CacheAnalysisPass : PassInfoMixin<CacheAnalysisPass> {
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bool PrintEdgesPost = false;
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bool PrintEdgesPost = false;
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bool DumpToDot = true;
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bool DumpToDot = true;
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bool DumpNodes = false;
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bool DumpNodes = false;
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bool LoopUnrolling = true;
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// Assume a 4kB Cache
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// Assume a 4kB Cache
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// with 16 Sets, associativity of 4 and Cachelines fitting two
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// with 16 Sets, associativity of 4 and Cachelines fitting two
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@ -228,14 +229,15 @@ struct CacheAnalysisPass : PassInfoMixin<CacheAnalysisPass> {
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if (PrintAddresses)
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if (PrintAddresses)
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addressPrinter(F);
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addressPrinter(F);
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}
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}
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if(LoopUnrolling)
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AC.unrollLoops();
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AC.fillAbstractCache(EntryAddress);
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if (DumpNodes)
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AC.dumpNodes();
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if (PrintEdgesPost)
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if (PrintEdgesPost)
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AC.dumpEdges();
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AC.dumpEdges();
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if (DumpToDot)
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if (DumpToDot)
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AC.dumpDotFile();
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AC.dumpDotFile();
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AC.unrollLoops();
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AC.fillAbstractCache(EntryAddress);
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if (DumpNodes)
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AC.dumpNodes();
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outs() << "MustHits: " << AC.collectHits() << "\n";
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outs() << "MustHits: " << AC.collectHits() << "\n";
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outs() << "MayMisses: " << AC.collectMisses() << "\n";
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outs() << "MayMisses: " << AC.collectMisses() << "\n";
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return PreservedAnalyses::all();
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return PreservedAnalyses::all();
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70
helper.sh
70
helper.sh
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@ -114,46 +114,36 @@ case $1 in
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echo "Currently not available!"
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echo "Currently not available!"
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echo "But please continue to implement the must join,"
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echo "But please continue to implement the must join,"
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echo "to the best of your abilities and check for updates!"
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echo "to the best of your abilities and check for updates!"
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# run "fft1"
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run "fft1"
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# echo "==== Correct fft1 ===="
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echo "==== Correct fft1 ===="
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# echo "MustHits: 16"
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echo "MustHits: 16"
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# echo "MayMisses: 280"
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echo "MayMisses: 280"
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# echo
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echo
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# run "bsort100"
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run "cnt"
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# echo "==== Correct bsort100 ===="
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echo "==== Correct cnt ===="
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# echo "MustHits: 1"
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echo "MustHits: x"
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# echo "MayMisses: 41"
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echo "MayMisses: xx"
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# echo
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echo
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# run "lms"
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run "crc"
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# echo "==== Correct lms ===="
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echo "==== Correct crc ===="
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# echo "MustHits: 5"
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echo "MustHits: x"
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# echo "MayMisses: 288"
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echo "MayMisses: xx"
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# echo
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echo
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# run "minver"
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run "duff"
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# echo "==== Correct minver ===="
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echo "==== Correct duff ===="
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# echo "MustHits: 6"
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echo "MustHits: x"
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# echo "MayMisses: 224"
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echo "MayMisses: xx"
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# echo
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echo
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# run "qsort-exam"
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run "insertsort"
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# echo "==== Correct qsort-exam ===="
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echo "==== Correct insertsort ===="
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# echo "MustHits: 2"
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echo "MustHits: x"
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# echo "MayMisses: 152"
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echo "MayMisses: xx"
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# echo
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echo
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# run "recursion"
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run "matmult"
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# echo "==== Correct recursion ===="
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echo "==== Correct matmult ===="
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# echo "MustHits: 8"
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echo "MustHits: x"
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# echo "MayMisses: 8"
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echo "MayMisses: x"
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# echo
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echo
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# run "select"
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# echo "==== Correct select ===="
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# echo "MustHits: 4"
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# echo "MayMisses: 108"
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# echo
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# run "whet"
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# echo "==== Correct whet ===="
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# echo "MustHits: 5"
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# echo "MayMisses: 265"
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# echo
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;;
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;;
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a | all)
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a | all)
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clean
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clean
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@ -30,7 +30,6 @@ public: // everything is public, because IDGAF
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// map keys are instruction Addresses.
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// map keys are instruction Addresses.
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std::map<unsigned int, std::list<unsigned int>> Edges;
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std::map<unsigned int, std::list<unsigned int>> Edges;
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std::map<unsigned int, AbstractState> Nodes;
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std::map<unsigned int, AbstractState> Nodes;
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unsigned int NumberOfNodes = 0;
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AbstractCache() {}
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AbstractCache() {}
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Nodes[Suc].Predecessors.push_back(Pre);
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Nodes[Suc].Predecessors.push_back(Pre);
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}
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}
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/**
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* @brief Add an Edge to the AbstractStateGraph
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*
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* @param Pre
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* @param Suc
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*/
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void removeEdge(unsigned int Pre, unsigned int Suc) {
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Edges[Pre].remove(Suc);
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Nodes[Pre].Successors.remove(Suc);
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Nodes[Suc].Predecessors.remove(Pre);
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}
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/**
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* @brief Add an Empty node @NodeAddr
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*
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* @param NodeAddr
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* @return unsigned int
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*/
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unsigned int addEmptyNode(unsigned int NodeAddr) {
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unsigned int addEmptyNode(unsigned int NodeAddr) {
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Nodes[NumberOfNodes++] = AbstractState(NodeAddr);
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int I = Nodes.size();
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return NumberOfNodes;
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Nodes[I] = AbstractState(NodeAddr);
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return I;
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}
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/**
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* @brief Returns True if a path From -> To exists.
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*
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* @param From
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* @param To
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* @return true
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* @return false
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*/
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bool findPath(unsigned int From, unsigned int To) {
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std::map<unsigned int, bool> Visited;
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Visited[From] = false;
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bool Ret = false;
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for (auto Visitor : Visited) {
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if (!Visitor.second) {
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for (unsigned int Next : Edges[Visitor.first]) {
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if (Next == To) {
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return true;
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}
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Visited[Next] = false;
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}
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}
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Visited[Visitor.first] = true;
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}
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return false;
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}
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/**
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* @brief Removes all Nested loops from the handed LoopBody
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*
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* @param LoopBodyIn
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* @param OrigNodeToUnrolledNode
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*/
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void removeNestedLoops(
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std::list<unsigned int> LoopBodyIn,
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std::map<unsigned int, unsigned int> OrigNodeToUnrolledNode) {
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unsigned int LoopHead = LoopBodyIn.front();
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unsigned int LoopTail = LoopBodyIn.back();
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unsigned int NestLoopTail;
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for (unsigned int NodeNr : LoopBodyIn) {
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bool IsLoopHead = false;
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bool FoundLoopBody = false;
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unsigned int LoopBodySize = 0;
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int NestLoopHead = 0;
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NestLoopHead = NodeNr;
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if (Nodes[NodeNr].Predecessors.size() > 1) {
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IsLoopHead = true;
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FoundLoopBody = false;
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LoopBodySize++;
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// is loop head?
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for (unsigned int Pre : Nodes[NodeNr].Predecessors) {
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if (Pre > NodeNr) {
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// Might be loop head.
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// check if all States between Pre and NodeNr are a coherent set.
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for (unsigned int I = NodeNr; I < Pre; I++) {
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// Check if all out going edges are in the set
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for (unsigned int Succ : Nodes[I].Successors) {
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if (Succ > Pre) {
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// Set is not coherent
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IsLoopHead = false;
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break;
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}
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}
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// check if all incoming edges are in the set.
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if (IsLoopHead && I != NodeNr)
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for (unsigned int Pred : Nodes[I].Predecessors) {
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if (Pred < NodeNr) {
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// Set is not coherent
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IsLoopHead = false;
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break;
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}
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}
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FoundLoopBody = true;
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LoopBodySize++;
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}
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NestLoopTail = Pre;
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} else if (!FoundLoopBody) {
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// If no coherent Loopbody exist we cannot unroll.
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NestLoopHead = 0;
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IsLoopHead = false;
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}
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if (FoundLoopBody) {
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// Check if a Path between Head and Tail exists,
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// if not its not a loop.
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if (findPath(NestLoopHead, NestLoopTail))
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removeEdge(OrigNodeToUnrolledNode[NestLoopTail],
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OrigNodeToUnrolledNode[NestLoopHead]);
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}
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}
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}
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}
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}
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}
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/**
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/**
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* @param NodeNr
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* @param NodeNr
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*/
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*/
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void unrollLoops() {
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void unrollLoops() {
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for (auto NodePair : Nodes) {
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unsigned int NestedBorder = 0;
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unsigned int NodeNr = NodePair.first;
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unsigned int LastNode = Nodes.size();
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if (NodeNr == 34) {
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unsigned int IterationCounter = 0;
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llvm::outs() << "HI\n";
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for (std::pair<const unsigned int, AbstractState> NodePair : Nodes) {
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IterationCounter++;
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if (NodePair.first == LastNode) {
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break;
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}
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}
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unsigned int NodeNr = NodePair.first;
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// Don't unroll nested loops
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if (NodeNr < NestedBorder)
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continue;
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bool IsLoopHead = false;
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bool IsLoopHead = false;
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bool FoundLoopBody = false;
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bool FoundLoopBody = false;
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bool Verbose = true;
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bool Verbose = false;
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std::list<unsigned int> LoopBody;
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std::list<unsigned int> LoopBody;
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std::list<unsigned int> AdditionalLoopTails;
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if (Nodes[NodeNr].Predecessors.size() > 1) {
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if (Nodes[NodeNr].Predecessors.size() > 1) {
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IsLoopHead = true;
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IsLoopHead = true;
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// is loop head?
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// is loop head?
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@ -73,15 +191,42 @@ public: // everything is public, because IDGAF
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if (Pre > NodeNr) {
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if (Pre > NodeNr) {
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// Might be loop head.
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// Might be loop head.
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// check if all States between Pre and NodeNr are a coherent set.
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// check if all States between Pre and NodeNr are a coherent set.
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for (uint I = NodeNr; I < Pre; I++) {
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for (unsigned int I = NodeNr; I < Pre; I++) {
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LoopBody.push_back(I);
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// Check if all out going edges are in the set
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for (uint Succ : Nodes[I].Successors) {
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for (unsigned int Succ : Nodes[I].Successors) {
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if (Succ > Pre) {
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for (unsigned int PreI : Nodes[I].Predecessors) {
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// Set is not coherent
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// Handle if we have multiple Loopheads.
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IsLoopHead = false;
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if (PreI >= Pre && I != NodeNr) {
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break;
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// I and Pre are Looptail.
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{
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if (std::find(AdditionalLoopTails.begin(),
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AdditionalLoopTails.end(),
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I) == AdditionalLoopTails.end()) {
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AdditionalLoopTails.push_back(I);
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break;
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}
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}
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}
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if (std::find(LoopBody.begin(), LoopBody.end(), I) ==
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LoopBody.end())
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LoopBody.push_back(I);
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if (Succ > Pre) {
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// Set is not coherent
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IsLoopHead = false;
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break;
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}
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}
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}
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}
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}
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// check if all incoming edges are in the set.
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if (IsLoopHead && I != NodeNr)
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for (unsigned int Pred : Nodes[I].Predecessors) {
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if (Pred < NodeNr) {
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// Set is not coherent
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IsLoopHead = false;
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break;
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}
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}
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FoundLoopBody = true;
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FoundLoopBody = true;
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}
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}
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LoopBody.push_back(Pre);
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LoopBody.push_back(Pre);
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@ -92,45 +237,91 @@ public: // everything is public, because IDGAF
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}
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}
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}
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}
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}
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}
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if (IsLoopHead && Verbose) {
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llvm::outs() << "Found LoopHead @: " << NodeNr << "\n";
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llvm::outs() << "With Body: {\n";
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int I = 1;
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for (auto Node : LoopBody) {
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llvm::outs() << Node << ", ";
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if (!(I++ % 5)) {
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llvm::outs() << "\n";
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}
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}
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llvm::outs() << "}\n";
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}
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// Found Loop Head and Body!
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// Found Loop Head and Body!
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// TODO: Now unroll
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// Add empty unrolled Nodes
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// Add empty unrolled Nodes
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// Map points from OrigNode To Unrolled Node.
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// Map points from OrigNode To Unrolled Node.
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std::map<unsigned int, unsigned int> OrigNodeToUnrolledNode;
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if (FoundLoopBody) {
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for (auto Node : LoopBody) {
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std::map<unsigned int, unsigned int> OrigNodeToUnrolledNode;
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// Node to unroll
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for (unsigned int Node : LoopBody) {
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AbstractState UnrolledNode(Nodes[Node]);
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// Node to unroll
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UnrolledNode.setUnrolled(1);
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AbstractState UnrolledNode(Nodes[Node]);
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Nodes[NumberOfNodes++] = UnrolledNode;
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UnrolledNode.setUnrolled(1);
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OrigNodeToUnrolledNode[Node] = NumberOfNodes;
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unsigned int I = Nodes.size();
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}
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Nodes[I] = UnrolledNode;
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OrigNodeToUnrolledNode[Node] = I;
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unsigned int LoopHead = LoopBody.front();
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assert(Nodes[OrigNodeToUnrolledNode[Node]].Unrolled == 1);
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LoopBody.pop_front();
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assert(Nodes[Node].Addr == Nodes[OrigNodeToUnrolledNode[Node]].Addr);
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unsigned int LoopTail = LoopBody.back();
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LoopBody.pop_back();
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for (auto Node : LoopBody) {
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for (auto Succ : Nodes[Node].Successors) {
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// Add All successors to unrolled Node
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Nodes[OrigNodeToUnrolledNode[Node]].Successors.push_back(
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OrigNodeToUnrolledNode[Succ]);
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}
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}
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for (auto Pre : Nodes[Node].Predecessors) {
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// Add All predecessors to unrolled Node
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// LoopTail and Head have to be processed different
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Nodes[OrigNodeToUnrolledNode[Node]].Successors.push_back(
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unsigned int LoopTail = LoopBody.back();
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OrigNodeToUnrolledNode[Pre]);
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LoopBody.pop_back();
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NestedBorder = LoopTail;
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unsigned int LoopHead = LoopBody.front();
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LoopBody.pop_front();
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// Find State entering to LoopHead ()
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unsigned int LoopHeadEntry = 0;
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for (unsigned int Pre : Nodes[LoopHead].Predecessors) {
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if (Pre < LoopHead) {
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LoopHeadEntry = Pre;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Make LoopHeadEntry point to unrolled state instead of the loop.
|
||||||
|
addEdge(LoopHeadEntry, OrigNodeToUnrolledNode[LoopHead]);
|
||||||
|
removeEdge(LoopHeadEntry, LoopHead);
|
||||||
|
// Connect unrolled Loop to the the original Loop.
|
||||||
|
if (AdditionalLoopTails.size() == 0)
|
||||||
|
addEdge(OrigNodeToUnrolledNode[LoopTail], LoopHead);
|
||||||
|
for (auto Tail : AdditionalLoopTails)
|
||||||
|
addEdge(OrigNodeToUnrolledNode[Tail], LoopHead);
|
||||||
|
|
||||||
|
// Fix all other states
|
||||||
|
addEdge(OrigNodeToUnrolledNode[LoopBody.back()],
|
||||||
|
OrigNodeToUnrolledNode[LoopTail]);
|
||||||
|
for (unsigned int Node : LoopBody) {
|
||||||
|
for (unsigned int Pre : Nodes[Node].Predecessors) {
|
||||||
|
// if (std::find(LoopBody.begin(), LoopBody.end(), Pre) !=
|
||||||
|
// LoopBody.end())
|
||||||
|
// Add All predecessors and successors to unrolled Nodes
|
||||||
|
addEdge(OrigNodeToUnrolledNode[Pre], OrigNodeToUnrolledNode[Node]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Remove Nested loops in unrolled loop
|
||||||
|
removeNestedLoops(LoopBody, OrigNodeToUnrolledNode);
|
||||||
|
|
||||||
|
if (Verbose && FoundLoopBody) {
|
||||||
|
llvm::outs() << "Found LoopHead @: " << NodeNr << "\n";
|
||||||
|
llvm::outs() << "With LoopTail @: " << LoopTail << "\n";
|
||||||
|
llvm::outs() << "With Body: {\n";
|
||||||
|
int I = 1;
|
||||||
|
for (auto Node : LoopBody) {
|
||||||
|
llvm::outs() << Node << ", ";
|
||||||
|
if (!(I++ % 5)) {
|
||||||
|
llvm::outs() << "\n";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
llvm::outs() << "}\n";
|
||||||
|
llvm::outs() << "Unrolled States: {\n";
|
||||||
|
I = 1;
|
||||||
|
for (auto Node : LoopBody) {
|
||||||
|
llvm::outs() << OrigNodeToUnrolledNode[Node] << ", ";
|
||||||
|
if (!(I++ % 5)) {
|
||||||
|
llvm::outs() << "\n";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
llvm::outs() << "}\n";
|
||||||
|
I = 1;
|
||||||
|
llvm::outs() << "OrigNodeToUnrolledNode: {\n";
|
||||||
|
for (auto Nr : OrigNodeToUnrolledNode) {
|
||||||
|
llvm::outs() << Nr.first << "->" << Nr.second << ", ";
|
||||||
|
if (!(I++ % 3))
|
||||||
|
llvm::outs() << "\n";
|
||||||
|
}
|
||||||
|
llvm::outs() << "}\n";
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -144,7 +335,6 @@ public: // everything is public, because IDGAF
|
||||||
*/
|
*/
|
||||||
void fillAbstractCache(unsigned int NodeNr) {
|
void fillAbstractCache(unsigned int NodeNr) {
|
||||||
// if(isLoopHead(NodeNr))
|
// if(isLoopHead(NodeNr))
|
||||||
// unrollLoop(NodeNr);
|
|
||||||
Nodes[NodeNr].Computed = true;
|
Nodes[NodeNr].Computed = true;
|
||||||
for (unsigned int SuccNr : Nodes[NodeNr].Successors) {
|
for (unsigned int SuccNr : Nodes[NodeNr].Successors) {
|
||||||
Nodes[SuccNr];
|
Nodes[SuccNr];
|
||||||
|
@ -162,6 +352,11 @@ public: // everything is public, because IDGAF
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Return number of measured Hits
|
||||||
|
*
|
||||||
|
* @return unsigned int
|
||||||
|
*/
|
||||||
unsigned int collectHits() {
|
unsigned int collectHits() {
|
||||||
unsigned int Hits = 0;
|
unsigned int Hits = 0;
|
||||||
for (auto const &E : Edges) {
|
for (auto const &E : Edges) {
|
||||||
|
@ -174,6 +369,11 @@ public: // everything is public, because IDGAF
|
||||||
return Hits;
|
return Hits;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Return number of measured Misses
|
||||||
|
*
|
||||||
|
* @return unsigned int
|
||||||
|
*/
|
||||||
unsigned int collectMisses() {
|
unsigned int collectMisses() {
|
||||||
unsigned int Misses = 0;
|
unsigned int Misses = 0;
|
||||||
for (auto const &E : Edges) {
|
for (auto const &E : Edges) {
|
||||||
|
@ -186,6 +386,10 @@ public: // everything is public, because IDGAF
|
||||||
return Misses;
|
return Misses;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Prints all Edges to Console
|
||||||
|
*
|
||||||
|
*/
|
||||||
void dumpEdges() {
|
void dumpEdges() {
|
||||||
llvm::outs() << "Dumping Edges:\n";
|
llvm::outs() << "Dumping Edges:\n";
|
||||||
for (auto const &E : Edges) {
|
for (auto const &E : Edges) {
|
||||||
|
@ -203,6 +407,10 @@ public: // everything is public, because IDGAF
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Dumps the Graph to a out.dot file
|
||||||
|
*
|
||||||
|
*/
|
||||||
void dumpDotFile() {
|
void dumpDotFile() {
|
||||||
bool PrintOld = true;
|
bool PrintOld = true;
|
||||||
std::ofstream DotFile;
|
std::ofstream DotFile;
|
||||||
|
@ -213,6 +421,9 @@ public: // everything is public, because IDGAF
|
||||||
for (unsigned int To : E.second) {
|
for (unsigned int To : E.second) {
|
||||||
if (PrintOld) {
|
if (PrintOld) {
|
||||||
DotFile << E.first << " -> " << To << "\n";
|
DotFile << E.first << " -> " << To << "\n";
|
||||||
|
if (Nodes[E.first].Unrolled) {
|
||||||
|
DotFile << E.first << " [color = red]\n";
|
||||||
|
}
|
||||||
} else {
|
} else {
|
||||||
DotFile << Nodes[E.first].Addr << "." << Nodes[E.first].Unrolled
|
DotFile << Nodes[E.first].Addr << "." << Nodes[E.first].Unrolled
|
||||||
<< " -> " << Nodes[To].Addr << "." << Nodes[To].Unrolled
|
<< " -> " << Nodes[To].Addr << "." << Nodes[To].Unrolled
|
||||||
|
@ -224,6 +435,10 @@ public: // everything is public, because IDGAF
|
||||||
DotFile.close();
|
DotFile.close();
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Prints all nodes to Console
|
||||||
|
*
|
||||||
|
*/
|
||||||
void dumpNodes() {
|
void dumpNodes() {
|
||||||
for (auto const &E : Edges) {
|
for (auto const &E : Edges) {
|
||||||
Nodes[E.first].dump();
|
Nodes[E.first].dump();
|
||||||
|
|
Loading…
Reference in New Issue