OS << "// *** NOTE: This file is #included into the middle of the target\n"
<< "// *** instruction selector class. These functions are really "
<< "methods.\n\n";
-
- OS << "// Instruction selector priority queue:\n"
- << "std::vector<SDNode*> ISelQueue;\n";
- OS << "/// Keep track of nodes which have already been added to queue.\n"
- << "unsigned char *ISelQueued;\n";
- OS << "/// Keep track of nodes which have already been selected.\n"
- << "unsigned char *ISelSelected;\n";
-
-
- OS << "/// IsChainCompatible - Returns true if Chain is Op or Chain does\n";
- OS << "/// not reach Op.\n";
- OS << "static bool IsChainCompatible(SDNode *Chain, SDNode *Op) {\n";
- OS << " if (Chain->getOpcode() == ISD::EntryToken)\n";
- OS << " return true;\n";
- OS << " else if (Chain->getOpcode() == ISD::TokenFactor)\n";
- OS << " return false;\n";
- OS << " else if (Chain->getNumOperands() > 0) {\n";
- OS << " SDOperand C0 = Chain->getOperand(0);\n";
- OS << " if (C0.getValueType() == MVT::Other)\n";
- OS << " return C0.Val != Op && IsChainCompatible(C0.Val, Op);\n";
- OS << " }\n";
- OS << " return true;\n";
- OS << "}\n";
-
- OS << "/// Sorting functions for the selection queue.\n"
- << "struct isel_sort : public std::binary_function"
- << "<SDNode*, SDNode*, bool> {\n"
- << " bool operator()(const SDNode* left, const SDNode* right) "
- << "const {\n"
- << " return (left->getNodeId() > right->getNodeId());\n"
- << " }\n"
- << "};\n\n";
-
- OS << "inline void setQueued(int Id) {\n";
- OS << " ISelQueued[Id / 8] |= 1 << (Id % 8);\n";
- OS << "}\n";
- OS << "inline bool isQueued(int Id) {\n";
- OS << " return ISelQueued[Id / 8] & (1 << (Id % 8));\n";
- OS << "}\n";
- OS << "inline void setSelected(int Id) {\n";
- OS << " ISelSelected[Id / 8] |= 1 << (Id % 8);\n";
- OS << "}\n";
- OS << "inline bool isSelected(int Id) {\n";
- OS << " return ISelSelected[Id / 8] & (1 << (Id % 8));\n";
- OS << "}\n\n";
-
- OS << "void AddToISelQueue(SDOperand N) DISABLE_INLINE {\n";
- OS << " int Id = N.Val->getNodeId();\n";
- OS << " if (Id != -1 && !isQueued(Id)) {\n";
- OS << " ISelQueue.push_back(N.Val);\n";
- OS << " std::push_heap(ISelQueue.begin(), ISelQueue.end(), isel_sort());\n";
- OS << " setQueued(Id);\n";
- OS << " }\n";
- OS << "}\n\n";
-
- OS << "class VISIBILITY_HIDDEN ISelQueueUpdater :\n";
- OS << " public SelectionDAG::DAGUpdateListener {\n";
- OS << " std::vector<SDNode*> &ISelQueue;\n";
- OS << " bool HadDelete;\n";
- OS << " public:\n";
- OS << " explicit ISelQueueUpdater(std::vector<SDNode*> &isq)\n";
- OS << " : ISelQueue(isq), HadDelete(false) {}\n";
- OS << " \n";
- OS << " bool hadDelete() const { return HadDelete; }\n";
- OS << " \n";
- OS << " virtual void NodeDeleted(SDNode *N) {\n";
- OS << " ISelQueue.erase(std::remove(ISelQueue.begin(), ISelQueue.end(),";
- OS << " N),\n ISelQueue.end());\n";
- OS << " HadDelete = true;\n";
- OS << " }\n";
- OS << " \n";
- OS << " // Ignore updates.\n";
- OS << " virtual void NodeUpdated(SDNode *N) {}\n";
- OS << " };\n";
-
- OS << "inline void UpdateQueue(const ISelQueueUpdater &ISQU) {\n";
- OS << " if (ISQU.hadDelete())\n";
- OS << " std::make_heap(ISelQueue.begin(), ISelQueue.end(),isel_sort());\n";
- OS << "}\n\n";
-
- OS << "void ReplaceUses(SDOperand F, SDOperand T) DISABLE_INLINE {\n";
- OS << " ISelQueueUpdater ISQU(ISelQueue);\n";
- OS << " CurDAG->ReplaceAllUsesOfValueWith(F, T, &ISQU);\n";
- OS << " setSelected(F.Val->getNodeId());\n";
- OS << " UpdateQueue(ISQU);\n";
- OS << "}\n";
- OS << "void ReplaceUses(SDNode *F, SDNode *T) DISABLE_INLINE {\n";
- OS << " unsigned FNumVals = F->getNumValues();\n";
- OS << " unsigned TNumVals = T->getNumValues();\n";
- OS << " ISelQueueUpdater ISQU(ISelQueue);\n";
- OS << " if (FNumVals != TNumVals) {\n";
- OS << " for (unsigned i = 0, e = std::min(FNumVals, TNumVals); "
- << "i < e; ++i)\n";
- OS << " CurDAG->ReplaceAllUsesOfValueWith(SDOperand(F, i), "
- << "SDOperand(T, i), &ISQU);\n";
- OS << " } else {\n";
- OS << " CurDAG->ReplaceAllUsesWith(F, T, &ISQU);\n";
- OS << " }\n";
- OS << " setSelected(F->getNodeId());\n";
- OS << " UpdateQueue(ISQU);\n";
- OS << "}\n\n";
-
- OS << "// SelectRoot - Top level entry to DAG isel.\n";
- OS << "SDOperand SelectRoot(SDOperand Root) {\n";
- OS << " SelectRootInit();\n";
- OS << " unsigned NumBytes = (DAGSize + 7) / 8;\n";
- OS << " ISelQueued = new unsigned char[NumBytes];\n";
- OS << " ISelSelected = new unsigned char[NumBytes];\n";
- OS << " memset(ISelQueued, 0, NumBytes);\n";
- OS << " memset(ISelSelected, 0, NumBytes);\n";
- OS << "\n";
- OS << " // Create a dummy node (which is not added to allnodes), that adds\n"
- << " // a reference to the root node, preventing it from being deleted,\n"
- << " // and tracking any changes of the root.\n"
- << " HandleSDNode Dummy(CurDAG->getRoot());\n"
- << " ISelQueue.push_back(CurDAG->getRoot().Val);\n";
- OS << " while (!ISelQueue.empty()) {\n";
- OS << " SDNode *Node = ISelQueue.front();\n";
- OS << " std::pop_heap(ISelQueue.begin(), ISelQueue.end(), isel_sort());\n";
- OS << " ISelQueue.pop_back();\n";
- OS << " if (!isSelected(Node->getNodeId())) {\n";
- OS << " SDNode *ResNode = Select(SDOperand(Node, 0));\n";
- OS << " if (ResNode != Node) {\n";
- OS << " if (ResNode)\n";
- OS << " ReplaceUses(Node, ResNode);\n";
- OS << " if (Node->use_empty()) { // Don't delete EntryToken, etc.\n";
- OS << " ISelQueueUpdater ISQU(ISelQueue);\n";
- OS << " CurDAG->RemoveDeadNode(Node, &ISQU);\n";
- OS << " UpdateQueue(ISQU);\n";
- OS << " }\n";
- OS << " }\n";
- OS << " }\n";
- OS << " }\n";
- OS << "\n";
- OS << " delete[] ISelQueued;\n";
- OS << " ISelQueued = NULL;\n";
- OS << " delete[] ISelSelected;\n";
- OS << " ISelSelected = NULL;\n";
- OS << " return Dummy.getValue();\n";
- OS << "}\n";
+ OS << "// Include standard, target-independent definitions and methods used\n"
+ << "// by the instruction selector.\n";
+ OS << "#include <llvm/CodeGen/DAGISelHeader.h>\n\n";
EmitNodeTransforms(OS);
EmitPredicateFunctions(OS);
projects / oota-llvm.git / blobdiff