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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
//===- SyntheticCountsUtils.h - utilities for count propagation--*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines utilities for synthetic counts propagation.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_SYNTHETIC_COUNTS_UTILS_H
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#define LLVM_ANALYSIS_SYNTHETIC_COUNTS_UTILS_H
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/Support/ScaledNumber.h"
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namespace llvm {
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class CallGraph;
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class Function;
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/// Class with methods to propagate synthetic entry counts.
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///
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/// This class is templated on the type of the call graph and designed to work
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/// with the traditional per-module callgraph and the summary callgraphs used in
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/// ThinLTO. This contains only static methods and alias templates.
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template <typename CallGraphType> class SyntheticCountsUtils {
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public:
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using Scaled64 = ScaledNumber<uint64_t>;
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using CGT = GraphTraits<CallGraphType>;
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using NodeRef = typename CGT::NodeRef;
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using EdgeRef = typename CGT::EdgeRef;
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using SccTy = std::vector<NodeRef>;
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// Not all EdgeRef have information about the source of the edge. Hence
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// NodeRef corresponding to the source of the EdgeRef is explicitly passed.
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using GetProfCountTy = function_ref<Optional<Scaled64>(NodeRef, EdgeRef)>;
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using AddCountTy = function_ref<void(NodeRef, Scaled64)>;
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static void propagate(const CallGraphType &CG, GetProfCountTy GetProfCount,
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AddCountTy AddCount);
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private:
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static void propagateFromSCC(const SccTy &SCC, GetProfCountTy GetProfCount,
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AddCountTy AddCount);
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};
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} // namespace llvm
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#endif
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