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authorvitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
committervitalyisaev <vitalyisaev@yandex-team.com>2023-06-29 10:00:50 +0300
commit6ffe9e53658409f212834330e13564e4952558f6 (patch)
tree85b1e00183517648b228aafa7c8fb07f5276f419 /contrib/libs/llvm14/include/llvm/CodeGen/ScheduleDFS.h
parent726057070f9c5a91fc10fde0d5024913d10f1ab9 (diff)
downloadydb-6ffe9e53658409f212834330e13564e4952558f6.tar.gz
YQ Connector: support managed ClickHouse
Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.
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+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- ScheduleDFS.h - ILP metric for ScheduleDAGInstrs ---------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Definition of an ILP metric for machine level instruction scheduling.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_SCHEDULEDFS_H
+#define LLVM_CODEGEN_SCHEDULEDFS_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/ScheduleDAG.h"
+#include <cassert>
+#include <cstdint>
+#include <vector>
+
+namespace llvm {
+
+template <typename T> class ArrayRef;
+class raw_ostream;
+
+/// Represent the ILP of the subDAG rooted at a DAG node.
+///
+/// ILPValues summarize the DAG subtree rooted at each node. ILPValues are
+/// valid for all nodes regardless of their subtree membership.
+///
+/// When computed using bottom-up DFS, this metric assumes that the DAG is a
+/// forest of trees with roots at the bottom of the schedule branching upward.
+struct ILPValue {
+ unsigned InstrCount;
+ /// Length may either correspond to depth or height, depending on direction,
+ /// and cycles or nodes depending on context.
+ unsigned Length;
+
+ ILPValue(unsigned count, unsigned length):
+ InstrCount(count), Length(length) {}
+
+ // Order by the ILP metric's value.
+ bool operator<(ILPValue RHS) const {
+ return (uint64_t)InstrCount * RHS.Length
+ < (uint64_t)Length * RHS.InstrCount;
+ }
+ bool operator>(ILPValue RHS) const {
+ return RHS < *this;
+ }
+ bool operator<=(ILPValue RHS) const {
+ return (uint64_t)InstrCount * RHS.Length
+ <= (uint64_t)Length * RHS.InstrCount;
+ }
+ bool operator>=(ILPValue RHS) const {
+ return RHS <= *this;
+ }
+
+ void print(raw_ostream &OS) const;
+
+ void dump() const;
+};
+
+/// Compute the values of each DAG node for various metrics during DFS.
+class SchedDFSResult {
+ friend class SchedDFSImpl;
+
+ static const unsigned InvalidSubtreeID = ~0u;
+
+ /// Per-SUnit data computed during DFS for various metrics.
+ ///
+ /// A node's SubtreeID is set to itself when it is visited to indicate that it
+ /// is the root of a subtree. Later it is set to its parent to indicate an
+ /// interior node. Finally, it is set to a representative subtree ID during
+ /// finalization.
+ struct NodeData {
+ unsigned InstrCount = 0;
+ unsigned SubtreeID = InvalidSubtreeID;
+
+ NodeData() = default;
+ };
+
+ /// Per-Subtree data computed during DFS.
+ struct TreeData {
+ unsigned ParentTreeID = InvalidSubtreeID;
+ unsigned SubInstrCount = 0;
+
+ TreeData() = default;
+ };
+
+ /// Record a connection between subtrees and the connection level.
+ struct Connection {
+ unsigned TreeID;
+ unsigned Level;
+
+ Connection(unsigned tree, unsigned level): TreeID(tree), Level(level) {}
+ };
+
+ bool IsBottomUp;
+ unsigned SubtreeLimit;
+ /// DFS results for each SUnit in this DAG.
+ std::vector<NodeData> DFSNodeData;
+
+ // Store per-tree data indexed on tree ID,
+ SmallVector<TreeData, 16> DFSTreeData;
+
+ // For each subtree discovered during DFS, record its connections to other
+ // subtrees.
+ std::vector<SmallVector<Connection, 4>> SubtreeConnections;
+
+ /// Cache the current connection level of each subtree.
+ /// This mutable array is updated during scheduling.
+ std::vector<unsigned> SubtreeConnectLevels;
+
+public:
+ SchedDFSResult(bool IsBU, unsigned lim)
+ : IsBottomUp(IsBU), SubtreeLimit(lim) {}
+
+ /// Get the node cutoff before subtrees are considered significant.
+ unsigned getSubtreeLimit() const { return SubtreeLimit; }
+
+ /// Return true if this DFSResult is uninitialized.
+ ///
+ /// resize() initializes DFSResult, while compute() populates it.
+ bool empty() const { return DFSNodeData.empty(); }
+
+ /// Clear the results.
+ void clear() {
+ DFSNodeData.clear();
+ DFSTreeData.clear();
+ SubtreeConnections.clear();
+ SubtreeConnectLevels.clear();
+ }
+
+ /// Initialize the result data with the size of the DAG.
+ void resize(unsigned NumSUnits) {
+ DFSNodeData.resize(NumSUnits);
+ }
+
+ /// Compute various metrics for the DAG with given roots.
+ void compute(ArrayRef<SUnit> SUnits);
+
+ /// Get the number of instructions in the given subtree and its
+ /// children.
+ unsigned getNumInstrs(const SUnit *SU) const {
+ return DFSNodeData[SU->NodeNum].InstrCount;
+ }
+
+ /// Get the number of instructions in the given subtree not including
+ /// children.
+ unsigned getNumSubInstrs(unsigned SubtreeID) const {
+ return DFSTreeData[SubtreeID].SubInstrCount;
+ }
+
+ /// Get the ILP value for a DAG node.
+ ///
+ /// A leaf node has an ILP of 1/1.
+ ILPValue getILP(const SUnit *SU) const {
+ return ILPValue(DFSNodeData[SU->NodeNum].InstrCount, 1 + SU->getDepth());
+ }
+
+ /// The number of subtrees detected in this DAG.
+ unsigned getNumSubtrees() const { return SubtreeConnectLevels.size(); }
+
+ /// Get the ID of the subtree the given DAG node belongs to.
+ ///
+ /// For convenience, if DFSResults have not been computed yet, give everything
+ /// tree ID 0.
+ unsigned getSubtreeID(const SUnit *SU) const {
+ if (empty())
+ return 0;
+ assert(SU->NodeNum < DFSNodeData.size() && "New Node");
+ return DFSNodeData[SU->NodeNum].SubtreeID;
+ }
+
+ /// Get the connection level of a subtree.
+ ///
+ /// For bottom-up trees, the connection level is the latency depth (in cycles)
+ /// of the deepest connection to another subtree.
+ unsigned getSubtreeLevel(unsigned SubtreeID) const {
+ return SubtreeConnectLevels[SubtreeID];
+ }
+
+ /// Scheduler callback to update SubtreeConnectLevels when a tree is
+ /// initially scheduled.
+ void scheduleTree(unsigned SubtreeID);
+};
+
+raw_ostream &operator<<(raw_ostream &OS, const ILPValue &Val);
+
+} // end namespace llvm
+
+#endif // LLVM_CODEGEN_SCHEDULEDFS_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif