50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
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//===- 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 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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