• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 //===- CoverageSummaryInfo.cpp - Coverage summary for function/file -------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // These structures are used to represent code coverage metrics
11 // for functions/files.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "CoverageSummaryInfo.h"
16 
17 using namespace llvm;
18 using namespace coverage;
19 
20 FunctionCoverageSummary
get(const coverage::FunctionRecord & Function)21 FunctionCoverageSummary::get(const coverage::FunctionRecord &Function) {
22   // Compute the region coverage
23   size_t NumCodeRegions = 0, CoveredRegions = 0;
24   for (auto &CR : Function.CountedRegions) {
25     if (CR.Kind != CounterMappingRegion::CodeRegion)
26       continue;
27     ++NumCodeRegions;
28     if (CR.ExecutionCount != 0)
29       ++CoveredRegions;
30   }
31 
32   // Compute the line coverage
33   size_t NumLines = 0, CoveredLines = 0;
34   for (unsigned FileID = 0, E = Function.Filenames.size(); FileID < E;
35        ++FileID) {
36     // Find the line start and end of the function's source code
37     // in that particular file
38     unsigned LineStart = std::numeric_limits<unsigned>::max();
39     unsigned LineEnd = 0;
40     for (auto &CR : Function.CountedRegions) {
41       if (CR.FileID != FileID)
42         continue;
43       LineStart = std::min(LineStart, CR.LineStart);
44       LineEnd = std::max(LineEnd, CR.LineEnd);
45     }
46     unsigned LineCount = LineEnd - LineStart + 1;
47 
48     // Get counters
49     llvm::SmallVector<uint64_t, 16> ExecutionCounts;
50     ExecutionCounts.resize(LineCount, 0);
51     for (auto &CR : Function.CountedRegions) {
52       if (CR.FileID != FileID)
53         continue;
54       // Ignore the lines that were skipped by the preprocessor.
55       auto ExecutionCount = CR.ExecutionCount;
56       if (CR.Kind == CounterMappingRegion::SkippedRegion) {
57         LineCount -= CR.LineEnd - CR.LineStart + 1;
58         ExecutionCount = 1;
59       }
60       for (unsigned I = CR.LineStart; I <= CR.LineEnd; ++I)
61         ExecutionCounts[I - LineStart] = ExecutionCount;
62     }
63     CoveredLines += LineCount - std::count(ExecutionCounts.begin(),
64                                            ExecutionCounts.end(), 0);
65     NumLines += LineCount;
66   }
67   return FunctionCoverageSummary(
68       Function.Name, Function.ExecutionCount,
69       RegionCoverageInfo(CoveredRegions, NumCodeRegions),
70       LineCoverageInfo(CoveredLines, 0, NumLines));
71 }
72