forked from OSchip/llvm-project
131 lines
4.3 KiB
C++
131 lines
4.3 KiB
C++
//===- CoverageSummaryInfo.cpp - Coverage summary for function/file -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// These structures are used to represent code coverage metrics
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// for functions/files.
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//
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//===----------------------------------------------------------------------===//
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#include "CoverageSummaryInfo.h"
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using namespace llvm;
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using namespace coverage;
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LineCoverageStats::LineCoverageStats(
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ArrayRef<const coverage::CoverageSegment *> LineSegments,
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const coverage::CoverageSegment *WrappedSegment) {
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// Find the minimum number of regions which start in this line.
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unsigned MinRegionCount = 0;
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auto isStartOfRegion = [](const coverage::CoverageSegment *S) {
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return !S->IsGapRegion && S->HasCount && S->IsRegionEntry;
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};
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for (unsigned I = 0; I < LineSegments.size() && MinRegionCount < 2; ++I)
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if (isStartOfRegion(LineSegments[I]))
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++MinRegionCount;
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bool StartOfSkippedRegion = !LineSegments.empty() &&
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!LineSegments.front()->HasCount &&
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LineSegments.front()->IsRegionEntry;
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ExecutionCount = 0;
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HasMultipleRegions = MinRegionCount > 1;
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Mapped =
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!StartOfSkippedRegion &&
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((WrappedSegment && WrappedSegment->HasCount) || (MinRegionCount > 0));
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if (!Mapped)
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return;
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// Pick the max count among regions which start and end on this line, to
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// avoid erroneously using the wrapped count, and to avoid picking region
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// counts which come from deferred regions.
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if (LineSegments.size() > 1) {
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for (unsigned I = 0; I < LineSegments.size() - 1; ++I) {
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if (!LineSegments[I]->IsGapRegion)
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ExecutionCount = std::max(ExecutionCount, LineSegments[I]->Count);
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}
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return;
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}
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// If a non-gap region starts here, use its count. Otherwise use the wrapped
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// count.
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if (MinRegionCount == 1)
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ExecutionCount = LineSegments[0]->Count;
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else
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ExecutionCount = WrappedSegment->Count;
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}
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FunctionCoverageSummary
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FunctionCoverageSummary::get(const CoverageMapping &CM,
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const coverage::FunctionRecord &Function) {
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// Compute the region coverage.
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size_t NumCodeRegions = 0, CoveredRegions = 0;
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for (auto &CR : Function.CountedRegions) {
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if (CR.Kind != CounterMappingRegion::CodeRegion)
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continue;
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++NumCodeRegions;
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if (CR.ExecutionCount != 0)
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++CoveredRegions;
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}
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// Compute the line coverage
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size_t NumLines = 0, CoveredLines = 0;
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CoverageData CD = CM.getCoverageForFunction(Function);
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auto NextSegment = CD.begin();
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auto EndSegment = CD.end();
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const coverage::CoverageSegment *WrappedSegment = nullptr;
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SmallVector<const coverage::CoverageSegment *, 4> LineSegments;
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unsigned Line = NextSegment->Line;
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while (NextSegment != EndSegment) {
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// Gather the segments on this line and the wrapped segment.
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if (LineSegments.size())
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WrappedSegment = LineSegments.back();
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LineSegments.clear();
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while (NextSegment != EndSegment && NextSegment->Line == Line)
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LineSegments.push_back(&*NextSegment++);
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LineCoverageStats LCS{LineSegments, WrappedSegment};
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if (LCS.isMapped()) {
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++NumLines;
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if (LCS.ExecutionCount)
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++CoveredLines;
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}
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++Line;
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}
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return FunctionCoverageSummary(
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Function.Name, Function.ExecutionCount,
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RegionCoverageInfo(CoveredRegions, NumCodeRegions),
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LineCoverageInfo(CoveredLines, NumLines));
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}
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FunctionCoverageSummary
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FunctionCoverageSummary::get(const InstantiationGroup &Group,
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ArrayRef<FunctionCoverageSummary> Summaries) {
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std::string Name;
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if (Group.hasName()) {
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Name = Group.getName();
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} else {
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llvm::raw_string_ostream OS(Name);
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OS << "Definition at line " << Group.getLine() << ", column "
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<< Group.getColumn();
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}
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FunctionCoverageSummary Summary(Name);
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Summary.ExecutionCount = Group.getTotalExecutionCount();
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Summary.RegionCoverage = Summaries[0].RegionCoverage;
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Summary.LineCoverage = Summaries[0].LineCoverage;
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for (const auto &FCS : Summaries.drop_front()) {
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Summary.RegionCoverage.merge(FCS.RegionCoverage);
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Summary.LineCoverage.merge(FCS.LineCoverage);
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}
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return Summary;
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}
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