tools/llvm-cov/CoverageSummaryInfo.cpp

   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
  21 FunctionCoverageSummary::get(const CoverageMapping &CM,
  22                              const coverage::FunctionRecord &Function) {
  23   // Compute the region coverage.
  24   size_t NumCodeRegions = 0, CoveredRegions = 0;
  25   for (auto &CR : Function.CountedRegions) {
  26     if (CR.Kind != CounterMappingRegion::CodeRegion)
  27       continue;
  28     ++NumCodeRegions;
  29     if (CR.ExecutionCount != 0)
  30       ++CoveredRegions;
  31   }
  32
  33   // Compute the line coverage
  34   size_t NumLines = 0, CoveredLines = 0;
  35   CoverageData CD = CM.getCoverageForFunction(Function);
  36   for (const auto &LCS : getLineCoverageStats(CD)) {
  37     if (!LCS.isMapped())
  38       continue;
  39     ++NumLines;
  40     if (LCS.getExecutionCount())
  41       ++CoveredLines;
  42   }
  43
  44   return FunctionCoverageSummary(
  45       Function.Name, Function.ExecutionCount,
  46       RegionCoverageInfo(CoveredRegions, NumCodeRegions),
  47       LineCoverageInfo(CoveredLines, NumLines));
  48 }
  49
  50 FunctionCoverageSummary
  51 FunctionCoverageSummary::get(const InstantiationGroup &Group,
  52                              ArrayRef<FunctionCoverageSummary> Summaries) {
  53   std::string Name;
  54   if (Group.hasName()) {
  55     Name = Group.getName();
  56   } else {
  57     llvm::raw_string_ostream OS(Name);
  58     OS << "Definition at line " << Group.getLine() << ", column "
  59        << Group.getColumn();
  60   }
  61
  62   FunctionCoverageSummary Summary(Name);
  63   Summary.ExecutionCount = Group.getTotalExecutionCount();
  64   Summary.RegionCoverage = Summaries[0].RegionCoverage;
  65   Summary.LineCoverage = Summaries[0].LineCoverage;
  66   for (const auto &FCS : Summaries.drop_front()) {
  67     Summary.RegionCoverage.merge(FCS.RegionCoverage);
  68     Summary.LineCoverage.merge(FCS.LineCoverage);
  69   }
  70   return Summary;
  71 }