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//===- SourceCoverageDataManager.cpp - Manager for source file coverage
// data-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class separates and merges mapping regions for a specific source file.
//
//===----------------------------------------------------------------------===//
#include "SourceCoverageDataManager.h"
using namespace llvm;
using namespace coverage;
void SourceCoverageDataManager::insert(const CountedRegion &CR) {
Regions.push_back(CR);
Segments.clear();
}
namespace {
class SegmentBuilder {
std::vector<CoverageSegment> Segments;
SmallVector<const CountedRegion *, 8> ActiveRegions;
/// Start a segment with no count specified.
void startSegment(unsigned Line, unsigned Col, bool IsRegionEntry) {
Segments.emplace_back(Line, Col, IsRegionEntry);
}
/// Start a segment with the given Region's count.
void startSegment(unsigned Line, unsigned Col, bool IsRegionEntry,
const CountedRegion &Region) {
if (Segments.empty())
Segments.emplace_back(Line, Col, IsRegionEntry);
CoverageSegment S = Segments.back();
// Avoid creating empty regions.
if (S.Line != Line || S.Col != Col) {
Segments.emplace_back(Line, Col, IsRegionEntry);
S = Segments.back();
}
// Set this region's count.
if (Region.Kind != coverage::CounterMappingRegion::SkippedRegion)
Segments.back().setCount(Region.ExecutionCount);
}
/// Start a segment for the given region.
void startSegment(const CountedRegion &Region) {
startSegment(Region.LineStart, Region.ColumnStart, true, Region);
}
/// Pop the top region off of the active stack, starting a new segment with
/// the containing Region's count.
void popRegion() {
const CountedRegion *Active = ActiveRegions.back();
unsigned Line = Active->LineEnd, Col = Active->ColumnEnd;
ActiveRegions.pop_back();
if (ActiveRegions.empty())
startSegment(Line, Col, /*IsRegionEntry=*/false);
else
startSegment(Line, Col, /*IsRegionEntry=*/false, *ActiveRegions.back());
}
public:
/// Build a list of CoverageSegments from a sorted list of Regions.
std::vector<CoverageSegment>
buildSegments(ArrayRef<CountedRegion> Regions) {
for (const auto &Region : Regions) {
// Pop any regions that end before this one starts.
while (!ActiveRegions.empty() &&
ActiveRegions.back()->endLoc() <= Region.startLoc())
popRegion();
// Add this region to the stack.
ActiveRegions.push_back(&Region);
startSegment(Region);
}
// Pop any regions that are left in the stack.
while (!ActiveRegions.empty())
popRegion();
return Segments;
}
};
}
ArrayRef<CoverageSegment> SourceCoverageDataManager::getCoverageSegments() {
if (Segments.empty()) {
// Sort the regions given that they're all in the same file at this point.
std::sort(Regions.begin(), Regions.end(),
[](const CountedRegion &LHS, const CountedRegion &RHS) {
if (LHS.startLoc() == RHS.startLoc())
// When LHS completely contains RHS, we sort LHS first.
return RHS.endLoc() < LHS.endLoc();
return LHS.startLoc() < RHS.startLoc();
});
Segments = SegmentBuilder().buildSegments(Regions);
}
return Segments;
}
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