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538ee6c38c
Running `-fsyntax-only` on UniqueID.h is 2x faster with this patch (which avoids calling `std::tie` for `operator<`). Since the transitive includers of this file will go up as `FileEntryRef` gets used in more places, avoid that compile-time hit. This is a follow-up to 23ed570af1cc165afea1b70a533a4a39d6656501 (suggested by Reid Kleckner). Also drop the `<tuple>` include from FileSystem.h (which was vestigal from before UniqueID.h was split out). Differential Revision: https://reviews.llvm.org/D90471
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
//===- llvm/Support/FileSystem/UniqueID.h - UniqueID for files --*- 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 is cut out of llvm/Support/FileSystem.h to allow UniqueID to be
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// reused without bloating the includes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_FILESYSTEM_UNIQUEID_H
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#define LLVM_SUPPORT_FILESYSTEM_UNIQUEID_H
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#include <cstdint>
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namespace llvm {
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namespace sys {
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namespace fs {
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class UniqueID {
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uint64_t Device;
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uint64_t File;
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public:
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UniqueID() = default;
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UniqueID(uint64_t Device, uint64_t File) : Device(Device), File(File) {}
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bool operator==(const UniqueID &Other) const {
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return Device == Other.Device && File == Other.File;
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}
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bool operator!=(const UniqueID &Other) const { return !(*this == Other); }
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bool operator<(const UniqueID &Other) const {
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/// Don't use std::tie since it bloats the compile time of this header.
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if (Device < Other.Device)
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return true;
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if (Other.Device < Device)
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return false;
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return File < Other.File;
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}
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uint64_t getDevice() const { return Device; }
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uint64_t getFile() const { return File; }
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};
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} // end namespace fs
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} // end namespace sys
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} // end namespace llvm
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#endif // LLVM_SUPPORT_FILESYSTEM_UNIQUEID_H
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