61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
//===- llvm/Support/UniqueBBID.h --------------------------------*- 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 contains a structure that uniquely identifies a basic block within
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// a function.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_UNIQUEBBID_H
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#define LLVM_SUPPORT_UNIQUEBBID_H
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#include "llvm/ADT/DenseMapInfo.h"
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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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// This structure represents the information for a basic block pertaining to
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// the basic block sections profile.
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struct UniqueBBID {
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unsigned BaseID;
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unsigned CloneID;
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};
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// The prefetch symbol is emitted immediately after the call of the given index,
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// in block `BBID` (First call has an index of 1). Zero callsite index means the
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// start of the block.
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struct CallsiteID {
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UniqueBBID BBID;
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unsigned CallsiteIndex;
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};
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// This represents a prefetch hint to be injected at site `SiteID`, targeting
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// `TargetID` in function `TargetFunction`.
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struct PrefetchHint {
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CallsiteID SiteID;
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StringRef TargetFunction;
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CallsiteID TargetID;
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};
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// Provides DenseMapInfo for UniqueBBID.
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template <> struct DenseMapInfo<UniqueBBID> {
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static unsigned getHashValue(const UniqueBBID &Val) {
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return DenseMapInfo<unsigned>::getHashValue(Val.BaseID) ^
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DenseMapInfo<unsigned>::getHashValue(Val.CloneID);
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}
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static bool isEqual(const UniqueBBID &LHS, const UniqueBBID &RHS) {
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return DenseMapInfo<unsigned>::isEqual(LHS.BaseID, RHS.BaseID) &&
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DenseMapInfo<unsigned>::isEqual(LHS.CloneID, RHS.CloneID);
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}
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};
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} // end namespace llvm
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#endif // LLVM_SUPPORT_UNIQUEBBID_H
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