75e164f61d
The cleanup was manual, but assisted by "include-what-you-use". It consists in 1. Removing unused forward declaration. No impact expected. 2. Removing unused headers in .cpp files. No impact expected. 3. Removing unused headers in .h files. This removes implicit dependencies and is generally considered a good thing, but this may break downstream builds. I've updated llvm, clang, lld, lldb and mlir deps, and included a list of the modification in the second part of the commit. 4. Replacing header inclusion by forward declaration. This has the same impact as 3. Notable changes: - llvm/Support/TargetParser.h no longer includes llvm/Support/AArch64TargetParser.h nor llvm/Support/ARMTargetParser.h - llvm/Support/TypeSize.h no longer includes llvm/Support/WithColor.h - llvm/Support/YAMLTraits.h no longer includes llvm/Support/Regex.h - llvm/ADT/SmallVector.h no longer includes llvm/Support/MemAlloc.h nor llvm/Support/ErrorHandling.h You may need to add some of these headers in your compilation units, if needs be. As an hint to the impact of the cleanup, running clang++ -E -Iinclude -I../llvm/include ../llvm/lib/Support/*.cpp -std=c++14 -fno-rtti -fno-exceptions | wc -l before: 8000919 lines after: 7917500 lines Reduced dependencies also helps incremental rebuilds and is more ccache friendly, something not shown by the above metric :-) Discourse thread on the topic: https://llvm.discourse.group/t/include-what-you-use-include-cleanup/5831
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
//===-------- BlockFrequency.h - Block Frequency Wrapper --------*- 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 implements Block Frequency class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_BLOCKFREQUENCY_H
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#define LLVM_SUPPORT_BLOCKFREQUENCY_H
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#include <cstdint>
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namespace llvm {
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class BranchProbability;
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// This class represents Block Frequency as a 64-bit value.
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class BlockFrequency {
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uint64_t Frequency;
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public:
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BlockFrequency(uint64_t Freq = 0) : Frequency(Freq) { }
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/// Returns the maximum possible frequency, the saturation value.
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static uint64_t getMaxFrequency() { return -1ULL; }
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/// Returns the frequency as a fixpoint number scaled by the entry
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/// frequency.
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uint64_t getFrequency() const { return Frequency; }
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/// Multiplies with a branch probability. The computation will never
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/// overflow.
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BlockFrequency &operator*=(BranchProbability Prob);
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BlockFrequency operator*(BranchProbability Prob) const;
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/// Divide by a non-zero branch probability using saturating
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/// arithmetic.
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BlockFrequency &operator/=(BranchProbability Prob);
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BlockFrequency operator/(BranchProbability Prob) const;
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/// Adds another block frequency using saturating arithmetic.
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BlockFrequency &operator+=(BlockFrequency Freq);
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BlockFrequency operator+(BlockFrequency Freq) const;
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/// Subtracts another block frequency using saturating arithmetic.
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BlockFrequency &operator-=(BlockFrequency Freq);
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BlockFrequency operator-(BlockFrequency Freq) const;
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/// Shift block frequency to the right by count digits saturating to 1.
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BlockFrequency &operator>>=(const unsigned count);
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bool operator<(BlockFrequency RHS) const {
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return Frequency < RHS.Frequency;
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}
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bool operator<=(BlockFrequency RHS) const {
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return Frequency <= RHS.Frequency;
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}
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bool operator>(BlockFrequency RHS) const {
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return Frequency > RHS.Frequency;
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}
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bool operator>=(BlockFrequency RHS) const {
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return Frequency >= RHS.Frequency;
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}
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bool operator==(BlockFrequency RHS) const {
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return Frequency == RHS.Frequency;
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}
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};
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}
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#endif
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