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Imported Upstream version 5.18.0.207

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Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449
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Xamarin Public Jenkins (auto-signing)
2018-11-17 08:23:10 +00:00
parent 8e12397d70
commit eb85e2fc17
28480 changed files with 72 additions and 3866936 deletions
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83
external/llvm/lib/Support/BlockFrequency.cpp vendored
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@ -1,83 +0,0 @@
//====--------------- lib/Support/BlockFrequency.cpp -----------*- C++ -*-====//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements Block Frequency class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/BlockFrequency.h"
#include <cassert>
using namespace llvm;
BlockFrequency &BlockFrequency::operator*=(BranchProbability Prob) {
Frequency = Prob.scale(Frequency);
return *this;
}
BlockFrequency BlockFrequency::operator*(BranchProbability Prob) const {
BlockFrequency Freq(Frequency);
Freq *= Prob;
return Freq;
}
BlockFrequency &BlockFrequency::operator/=(BranchProbability Prob) {
Frequency = Prob.scaleByInverse(Frequency);
return *this;
}
BlockFrequency BlockFrequency::operator/(BranchProbability Prob) const {
BlockFrequency Freq(Frequency);
Freq /= Prob;
return Freq;
}
BlockFrequency &BlockFrequency::operator+=(BlockFrequency Freq) {
uint64_t Before = Freq.Frequency;
Frequency += Freq.Frequency;
// If overflow, set frequency to the maximum value.
if (Frequency < Before)
Frequency = UINT64_MAX;
return *this;
}
BlockFrequency BlockFrequency::operator+(BlockFrequency Freq) const {
BlockFrequency NewFreq(Frequency);
NewFreq += Freq;
return NewFreq;
}
BlockFrequency &BlockFrequency::operator-=(BlockFrequency Freq) {
// If underflow, set frequency to 0.
if (Frequency <= Freq.Frequency)
Frequency = 0;
else
Frequency -= Freq.Frequency;
return *this;
}
BlockFrequency BlockFrequency::operator-(BlockFrequency Freq) const {
BlockFrequency NewFreq(Frequency);
NewFreq -= Freq;
return NewFreq;
}
BlockFrequency &BlockFrequency::operator>>=(const unsigned count) {
// Frequency can never be 0 by design.
assert(Frequency != 0);
// Shift right by count.
Frequency >>= count;
// Saturate to 1 if we are 0.
Frequency |= Frequency == 0;
return *this;
}