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annotate tools/llvm-cov/CoverageSummaryInfo.cpp @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 60c9769439b8
children 1172e4bd9c6f
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1 //===- CoverageSummaryInfo.cpp - Coverage summary for function/file -------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // These structures are used to represent code coverage metrics
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11 // for functions/files.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "CoverageSummaryInfo.h"
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16
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17 using namespace llvm;
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18 using namespace coverage;
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19
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20 FunctionCoverageSummary
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21 FunctionCoverageSummary::get(const coverage::FunctionRecord &Function) {
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22 // Compute the region coverage
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23 size_t NumCodeRegions = 0, CoveredRegions = 0;
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24 for (auto &CR : Function.CountedRegions) {
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25 if (CR.Kind != CounterMappingRegion::CodeRegion)
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26 continue;
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27 ++NumCodeRegions;
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28 if (CR.ExecutionCount != 0)
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29 ++CoveredRegions;
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30 }
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31
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32 // Compute the line coverage
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33 size_t NumLines = 0, CoveredLines = 0;
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34 for (unsigned FileID = 0, E = Function.Filenames.size(); FileID < E;
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35 ++FileID) {
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36 // Find the line start and end of the function's source code
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37 // in that particular file
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38 unsigned LineStart = std::numeric_limits<unsigned>::max();
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39 unsigned LineEnd = 0;
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40 for (auto &CR : Function.CountedRegions) {
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41 if (CR.FileID != FileID)
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42 continue;
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43 LineStart = std::min(LineStart, CR.LineStart);
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44 LineEnd = std::max(LineEnd, CR.LineEnd);
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45 }
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46 unsigned LineCount = LineEnd - LineStart + 1;
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47
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48 // Get counters
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49 llvm::SmallVector<uint64_t, 16> ExecutionCounts;
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50 ExecutionCounts.resize(LineCount, 0);
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51 for (auto &CR : Function.CountedRegions) {
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52 if (CR.FileID != FileID)
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53 continue;
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54 // Ignore the lines that were skipped by the preprocessor.
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55 auto ExecutionCount = CR.ExecutionCount;
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56 if (CR.Kind == CounterMappingRegion::SkippedRegion) {
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57 LineCount -= CR.LineEnd - CR.LineStart + 1;
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58 ExecutionCount = 1;
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59 }
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60 for (unsigned I = CR.LineStart; I <= CR.LineEnd; ++I)
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61 ExecutionCounts[I - LineStart] = ExecutionCount;
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62 }
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63 CoveredLines += LineCount - std::count(ExecutionCounts.begin(),
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64 ExecutionCounts.end(), 0);
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65 NumLines += LineCount;
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66 }
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67 return FunctionCoverageSummary(
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68 Function.Name, Function.ExecutionCount,
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69 RegionCoverageInfo(CoveredRegions, NumCodeRegions),
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70 LineCoverageInfo(CoveredLines, 0, NumLines));
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71 }