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llvm-mirror/lib/IR/GCOV.cpp
Chandler Carruth 87f14b4eec Re-sort all of the includes with ./utils/sort_includes.py so that 
subsequent changes are easier to review. About to fix some layering
issues, and wanted to separate out the necessary churn.

Also comment and sink the include of "Windows.h" in three .inc files to
match the usage in Memory.inc.

llvm-svn: 198685
2014-01-07 11:48:04 +00:00

679 lines
23 KiB
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//===- GCOV.cpp - LLVM coverage tool --------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// GCOV implements the interface to read and write coverage files that use
// 'gcov' format.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Debug.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/GCOV.h"
#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/system_error.h"
#include <algorithm>
using namespace llvm;
//===----------------------------------------------------------------------===//
// GCOVFile implementation.
/// ~GCOVFile - Delete GCOVFile and its content.
GCOVFile::~GCOVFile() {
DeleteContainerPointers(Functions);
}
/// readGCNO - Read GCNO buffer.
bool GCOVFile::readGCNO(GCOVBuffer &Buffer) {
if (!Buffer.readGCNOFormat()) return false;
if (!Buffer.readGCOVVersion(Version)) return false;
if (!Buffer.readInt(Checksum)) return false;
while (true) {
if (!Buffer.readFunctionTag()) break;
GCOVFunction *GFun = new GCOVFunction(*this);
if (!GFun->readGCNO(Buffer, Version))
return false;
Functions.push_back(GFun);
}
GCNOInitialized = true;
return true;
}
/// readGCDA - Read GCDA buffer. It is required that readGCDA() can only be
/// called after readGCNO().
bool GCOVFile::readGCDA(GCOVBuffer &Buffer) {
assert(GCNOInitialized && "readGCDA() can only be called after readGCNO()");
if (!Buffer.readGCDAFormat()) return false;
GCOV::GCOVVersion GCDAVersion;
if (!Buffer.readGCOVVersion(GCDAVersion)) return false;
if (Version != GCDAVersion) {
errs() << "GCOV versions do not match.\n";
return false;
}
uint32_t GCDAChecksum;
if (!Buffer.readInt(GCDAChecksum)) return false;
if (Checksum != GCDAChecksum) {
errs() << "File checksums do not match: " << Checksum << " != "
<< GCDAChecksum << ".\n";
return false;
}
for (size_t i = 0, e = Functions.size(); i < e; ++i) {
if (!Buffer.readFunctionTag()) {
errs() << "Unexpected number of functions.\n";
return false;
}
if (!Functions[i]->readGCDA(Buffer, Version))
return false;
}
if (Buffer.readObjectTag()) {
uint32_t Length;
uint32_t Dummy;
if (!Buffer.readInt(Length)) return false;
if (!Buffer.readInt(Dummy)) return false; // checksum
if (!Buffer.readInt(Dummy)) return false; // num
if (!Buffer.readInt(RunCount)) return false;
Buffer.advanceCursor(Length-3);
}
while (Buffer.readProgramTag()) {
uint32_t Length;
if (!Buffer.readInt(Length)) return false;
Buffer.advanceCursor(Length);
++ProgramCount;
}
return true;
}
/// dump - Dump GCOVFile content to dbgs() for debugging purposes.
void GCOVFile::dump() const {
for (SmallVectorImpl<GCOVFunction *>::const_iterator I = Functions.begin(),
E = Functions.end(); I != E; ++I)
(*I)->dump();
}
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVFile::collectLineCounts(FileInfo &FI) {
for (SmallVectorImpl<GCOVFunction *>::iterator I = Functions.begin(),
E = Functions.end(); I != E; ++I)
(*I)->collectLineCounts(FI);
FI.setRunCount(RunCount);
FI.setProgramCount(ProgramCount);
}
//===----------------------------------------------------------------------===//
// GCOVFunction implementation.
/// ~GCOVFunction - Delete GCOVFunction and its content.
GCOVFunction::~GCOVFunction() {
DeleteContainerPointers(Blocks);
DeleteContainerPointers(Edges);
}
/// readGCNO - Read a function from the GCNO buffer. Return false if an error
/// occurs.
bool GCOVFunction::readGCNO(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
uint32_t Dummy;
if (!Buff.readInt(Dummy)) return false; // Function header length
if (!Buff.readInt(Ident)) return false;
if (!Buff.readInt(Checksum)) return false;
if (Version != GCOV::V402) {
uint32_t CfgChecksum;
if (!Buff.readInt(CfgChecksum)) return false;
if (Parent.getChecksum() != CfgChecksum) {
errs() << "File checksums do not match: " << Parent.getChecksum()
<< " != " << CfgChecksum << " in (" << Name << ").\n";
return false;
}
}
if (!Buff.readString(Name)) return false;
if (!Buff.readString(Filename)) return false;
if (!Buff.readInt(LineNumber)) return false;
// read blocks.
if (!Buff.readBlockTag()) {
errs() << "Block tag not found.\n";
return false;
}
uint32_t BlockCount;
if (!Buff.readInt(BlockCount)) return false;
for (uint32_t i = 0, e = BlockCount; i != e; ++i) {
if (!Buff.readInt(Dummy)) return false; // Block flags;
Blocks.push_back(new GCOVBlock(*this, i));
}
// read edges.
while (Buff.readEdgeTag()) {
uint32_t EdgeCount;
if (!Buff.readInt(EdgeCount)) return false;
EdgeCount = (EdgeCount - 1) / 2;
uint32_t BlockNo;
if (!Buff.readInt(BlockNo)) return false;
if (BlockNo >= BlockCount) {
errs() << "Unexpected block number: " << BlockNo << " (in " << Name
<< ").\n";
return false;
}
for (uint32_t i = 0, e = EdgeCount; i != e; ++i) {
uint32_t Dst;
if (!Buff.readInt(Dst)) return false;
GCOVEdge *Edge = new GCOVEdge(Blocks[BlockNo], Blocks[Dst]);
Edges.push_back(Edge);
Blocks[BlockNo]->addDstEdge(Edge);
Blocks[Dst]->addSrcEdge(Edge);
if (!Buff.readInt(Dummy)) return false; // Edge flag
}
}
// read line table.
while (Buff.readLineTag()) {
uint32_t LineTableLength;
if (!Buff.readInt(LineTableLength)) return false;
uint32_t EndPos = Buff.getCursor() + LineTableLength*4;
uint32_t BlockNo;
if (!Buff.readInt(BlockNo)) return false;
if (BlockNo >= BlockCount) {
errs() << "Unexpected block number: " << BlockNo << " (in " << Name
<< ").\n";
return false;
}
GCOVBlock *Block = Blocks[BlockNo];
if (!Buff.readInt(Dummy)) return false; // flag
while (Buff.getCursor() != (EndPos - 4)) {
StringRef F;
if (!Buff.readString(F)) return false;
if (Filename != F) {
errs() << "Multiple sources for a single basic block: " << Filename
<< " != " << F << " (in " << Name << ").\n";
return false;
}
if (Buff.getCursor() == (EndPos - 4)) break;
while (true) {
uint32_t Line;
if (!Buff.readInt(Line)) return false;
if (!Line) break;
Block->addLine(Line);
}
}
if (!Buff.readInt(Dummy)) return false; // flag
}
return true;
}
/// readGCDA - Read a function from the GCDA buffer. Return false if an error
/// occurs.
bool GCOVFunction::readGCDA(GCOVBuffer &Buff, GCOV::GCOVVersion Version) {
uint32_t Dummy;
if (!Buff.readInt(Dummy)) return false; // Function header length
uint32_t GCDAIdent;
if (!Buff.readInt(GCDAIdent)) return false;
if (Ident != GCDAIdent) {
errs() << "Function identifiers do not match: " << Ident << " != "
<< GCDAIdent << " (in " << Name << ").\n";
return false;
}
uint32_t GCDAChecksum;
if (!Buff.readInt(GCDAChecksum)) return false;
if (Checksum != GCDAChecksum) {
errs() << "Function checksums do not match: " << Checksum << " != "
<< GCDAChecksum << " (in " << Name << ").\n";
return false;
}
uint32_t CfgChecksum;
if (Version != GCOV::V402) {
if (!Buff.readInt(CfgChecksum)) return false;
if (Parent.getChecksum() != CfgChecksum) {
errs() << "File checksums do not match: " << Parent.getChecksum()
<< " != " << CfgChecksum << " (in " << Name << ").\n";
return false;
}
}
StringRef GCDAName;
if (!Buff.readString(GCDAName)) return false;
if (Name != GCDAName) {
errs() << "Function names do not match: " << Name << " != " << GCDAName
<< ".\n";
return false;
}
if (!Buff.readArcTag()) {
errs() << "Arc tag not found (in " << Name << ").\n";
return false;
}
uint32_t Count;
if (!Buff.readInt(Count)) return false;
Count /= 2;
// This for loop adds the counts for each block. A second nested loop is
// required to combine the edge counts that are contained in the GCDA file.
for (uint32_t BlockNo = 0; Count > 0; ++BlockNo) {
// The last block is always reserved for exit block
if (BlockNo >= Blocks.size()-1) {
errs() << "Unexpected number of edges (in " << Name << ").\n";
return false;
}
GCOVBlock &Block = *Blocks[BlockNo];
for (size_t EdgeNo = 0, End = Block.getNumDstEdges(); EdgeNo < End;
++EdgeNo) {
if (Count == 0) {
errs() << "Unexpected number of edges (in " << Name << ").\n";
return false;
}
uint64_t ArcCount;
if (!Buff.readInt64(ArcCount)) return false;
Block.addCount(EdgeNo, ArcCount);
--Count;
}
Block.sortDstEdges();
}
return true;
}
/// getEntryCount - Get the number of times the function was called by
/// retrieving the entry block's count.
uint64_t GCOVFunction::getEntryCount() const {
return Blocks.front()->getCount();
}
/// getExitCount - Get the number of times the function returned by retrieving
/// the exit block's count.
uint64_t GCOVFunction::getExitCount() const {
return Blocks.back()->getCount();
}
/// dump - Dump GCOVFunction content to dbgs() for debugging purposes.
void GCOVFunction::dump() const {
dbgs() << "===== " << Name << " @ " << Filename << ":" << LineNumber << "\n";
for (SmallVectorImpl<GCOVBlock *>::const_iterator I = Blocks.begin(),
E = Blocks.end(); I != E; ++I)
(*I)->dump();
}
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVFunction::collectLineCounts(FileInfo &FI) {
for (SmallVectorImpl<GCOVBlock *>::iterator I = Blocks.begin(),
E = Blocks.end(); I != E; ++I)
(*I)->collectLineCounts(FI);
FI.addFunctionLine(Filename, LineNumber, this);
}
//===----------------------------------------------------------------------===//
// GCOVBlock implementation.
/// ~GCOVBlock - Delete GCOVBlock and its content.
GCOVBlock::~GCOVBlock() {
SrcEdges.clear();
DstEdges.clear();
Lines.clear();
}
/// addCount - Add to block counter while storing the edge count. If the
/// destination has no outgoing edges, also update that block's count too.
void GCOVBlock::addCount(size_t DstEdgeNo, uint64_t N) {
assert(DstEdgeNo < DstEdges.size()); // up to caller to ensure EdgeNo is valid
DstEdges[DstEdgeNo]->Count = N;
Counter += N;
if (!DstEdges[DstEdgeNo]->Dst->getNumDstEdges())
DstEdges[DstEdgeNo]->Dst->Counter += N;
}
/// sortDstEdges - Sort destination edges by block number, nop if already
/// sorted. This is required for printing branch info in the correct order.
void GCOVBlock::sortDstEdges() {
if (!DstEdgesAreSorted) {
SortDstEdgesFunctor SortEdges;
std::stable_sort(DstEdges.begin(), DstEdges.end(), SortEdges);
}
}
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVBlock::collectLineCounts(FileInfo &FI) {
for (SmallVectorImpl<uint32_t>::iterator I = Lines.begin(),
E = Lines.end(); I != E; ++I)
FI.addBlockLine(Parent.getFilename(), *I, this);
}
/// dump - Dump GCOVBlock content to dbgs() for debugging purposes.
void GCOVBlock::dump() const {
dbgs() << "Block : " << Number << " Counter : " << Counter << "\n";
if (!SrcEdges.empty()) {
dbgs() << "\tSource Edges : ";
for (EdgeIterator I = SrcEdges.begin(), E = SrcEdges.end(); I != E; ++I) {
const GCOVEdge *Edge = *I;
dbgs() << Edge->Src->Number << " (" << Edge->Count << "), ";
}
dbgs() << "\n";
}
if (!DstEdges.empty()) {
dbgs() << "\tDestination Edges : ";
for (EdgeIterator I = DstEdges.begin(), E = DstEdges.end(); I != E; ++I) {
const GCOVEdge *Edge = *I;
dbgs() << Edge->Dst->Number << " (" << Edge->Count << "), ";
}
dbgs() << "\n";
}
if (!Lines.empty()) {
dbgs() << "\tLines : ";
for (SmallVectorImpl<uint32_t>::const_iterator I = Lines.begin(),
E = Lines.end(); I != E; ++I)
dbgs() << (*I) << ",";
dbgs() << "\n";
}
}
//===----------------------------------------------------------------------===//
// FileInfo implementation.
// Safe integer division, returns 0 if numerator is 0.
static uint32_t safeDiv(uint64_t Numerator, uint64_t Divisor) {
if (!Numerator)
return 0;
return Numerator/Divisor;
}
// This custom division function mimics gcov's branch ouputs:
// - Round to closest whole number
// - Only output 0% or 100% if it's exactly that value
static uint32_t branchDiv(uint64_t Numerator, uint64_t Divisor) {
if (!Numerator)
return 0;
if (Numerator == Divisor)
return 100;
uint8_t Res = (Numerator*100+Divisor/2) / Divisor;
if (Res == 0)
return 1;
if (Res == 100)
return 99;
return Res;
}
struct formatBranchInfo {
formatBranchInfo(const GCOVOptions &Options, uint64_t Count,
uint64_t Total) :
Options(Options), Count(Count), Total(Total) {}
void print(raw_ostream &OS) const {
if (!Total)
OS << "never executed";
else if (Options.BranchCount)
OS << "taken " << Count;
else
OS << "taken " << branchDiv(Count, Total) << "%";
}
const GCOVOptions &Options;
uint64_t Count;
uint64_t Total;
};
static raw_ostream &operator<<(raw_ostream &OS, const formatBranchInfo &FBI) {
FBI.print(OS);
return OS;
}
/// print - Print source files with collected line count information.
void FileInfo::print(StringRef GCNOFile, StringRef GCDAFile) {
for (StringMap<LineData>::const_iterator I = LineInfo.begin(),
E = LineInfo.end(); I != E; ++I) {
StringRef Filename = I->first();
OwningPtr<MemoryBuffer> Buff;
if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
errs() << Filename << ": " << ec.message() << "\n";
return;
}
StringRef AllLines = Buff->getBuffer();
std::string CovFilename = Filename.str() + ".gcov";
std::string ErrorInfo;
raw_fd_ostream OS(CovFilename.c_str(), ErrorInfo);
if (!ErrorInfo.empty())
errs() << ErrorInfo << "\n";
OS << " -: 0:Source:" << Filename << "\n";
OS << " -: 0:Graph:" << GCNOFile << "\n";
OS << " -: 0:Data:" << GCDAFile << "\n";
OS << " -: 0:Runs:" << RunCount << "\n";
OS << " -: 0:Programs:" << ProgramCount << "\n";
const LineData &Line = I->second;
GCOVCoverage FileCoverage(Filename);
for (uint32_t LineIndex = 0; !AllLines.empty(); ++LineIndex) {
if (Options.BranchInfo) {
FunctionLines::const_iterator FuncsIt = Line.Functions.find(LineIndex);
if (FuncsIt != Line.Functions.end())
printFunctionSummary(OS, FuncsIt->second);
}
BlockLines::const_iterator BlocksIt = Line.Blocks.find(LineIndex);
if (BlocksIt == Line.Blocks.end()) {
// No basic blocks are on this line. Not an executable line of code.
OS << " -:";
std::pair<StringRef, StringRef> P = AllLines.split('\n');
OS << format("%5u:", LineIndex+1) << P.first << "\n";
AllLines = P.second;
} else {
const BlockVector &Blocks = BlocksIt->second;
// Add up the block counts to form line counts.
DenseMap<const GCOVFunction *, bool> LineExecs;
uint64_t LineCount = 0;
for (BlockVector::const_iterator I = Blocks.begin(), E = Blocks.end();
I != E; ++I) {
const GCOVBlock *Block = *I;
if (Options.AllBlocks) {
// Only take the highest block count for that line.
uint64_t BlockCount = Block->getCount();
LineCount = LineCount > BlockCount ? LineCount : BlockCount;
} else {
// Sum up all of the block counts.
LineCount += Block->getCount();
}
if (Options.FuncCoverage) {
// This is a slightly convoluted way to most accurately gather line
// statistics for functions. Basically what is happening is that we
// don't want to count a single line with multiple blocks more than
// once. However, we also don't simply want to give the total line
// count to every function that starts on the line. Thus, what is
// happening here are two things:
// 1) Ensure that the number of logical lines is only incremented
// once per function.
// 2) If there are multiple blocks on the same line, ensure that the
// number of lines executed is incremented as long as at least
// one of the blocks are executed.
const GCOVFunction *Function = &Block->getParent();
if (FuncCoverages.find(Function) == FuncCoverages.end()) {
std::pair<const GCOVFunction *, GCOVCoverage>
KeyValue(Function, GCOVCoverage(Function->getName()));
FuncCoverages.insert(KeyValue);
}
GCOVCoverage &FuncCoverage = FuncCoverages.find(Function)->second;
if (LineExecs.find(Function) == LineExecs.end()) {
if (Block->getCount()) {
++FuncCoverage.LinesExec;
LineExecs[Function] = true;
} else {
LineExecs[Function] = false;
}
++FuncCoverage.LogicalLines;
} else if (!LineExecs[Function] && Block->getCount()) {
++FuncCoverage.LinesExec;
LineExecs[Function] = true;
}
}
}
if (LineCount == 0)
OS << " #####:";
else {
OS << format("%9" PRIu64 ":", LineCount);
++FileCoverage.LinesExec;
}
++FileCoverage.LogicalLines;
std::pair<StringRef, StringRef> P = AllLines.split('\n');
OS << format("%5u:", LineIndex+1) << P.first << "\n";
AllLines = P.second;
uint32_t BlockNo = 0;
uint32_t EdgeNo = 0;
for (BlockVector::const_iterator I = Blocks.begin(), E = Blocks.end();
I != E; ++I) {
const GCOVBlock *Block = *I;
// Only print block and branch information at the end of the block.
if (Block->getLastLine() != LineIndex+1)
continue;
if (Options.AllBlocks)
printBlockInfo(OS, *Block, LineIndex, BlockNo);
if (Options.BranchInfo) {
size_t NumEdges = Block->getNumDstEdges();
if (NumEdges > 1)
printBranchInfo(OS, *Block, FileCoverage, EdgeNo);
else if (Options.UncondBranch && NumEdges == 1)
printUncondBranchInfo(OS, EdgeNo, (*Block->dst_begin())->Count);
}
}
}
}
FileCoverages.push_back(FileCoverage);
}
// FIXME: There is no way to detect calls given current instrumentation.
if (Options.FuncCoverage)
printFuncCoverage();
printFileCoverage();
}
/// printFunctionSummary - Print function and block summary.
void FileInfo::printFunctionSummary(raw_fd_ostream &OS,
const FunctionVector &Funcs) const {
for (FunctionVector::const_iterator I = Funcs.begin(), E = Funcs.end();
I != E; ++I) {
const GCOVFunction *Func = *I;
uint64_t EntryCount = Func->getEntryCount();
uint32_t BlocksExec = 0;
for (GCOVFunction::BlockIterator I = Func->block_begin(),
E = Func->block_end(); I != E; ++I) {
const GCOVBlock *Block = *I;
if (Block->getNumDstEdges() && Block->getCount())
++BlocksExec;
}
OS << "function " << Func->getName() << " called " << EntryCount
<< " returned " << safeDiv(Func->getExitCount()*100, EntryCount)
<< "% blocks executed "
<< safeDiv(BlocksExec*100, Func->getNumBlocks()-1) << "%\n";
}
}
/// printBlockInfo - Output counts for each block.
void FileInfo::printBlockInfo(raw_fd_ostream &OS, const GCOVBlock &Block,
uint32_t LineIndex, uint32_t &BlockNo) const {
if (Block.getCount() == 0)
OS << " $$$$$:";
else
OS << format("%9" PRIu64 ":", Block.getCount());
OS << format("%5u-block %2u\n", LineIndex+1, BlockNo++);
}
/// printBranchInfo - Print conditional branch probabilities.
void FileInfo::printBranchInfo(raw_fd_ostream &OS, const GCOVBlock &Block,
GCOVCoverage &Coverage, uint32_t &EdgeNo) {
SmallVector<uint64_t, 16> BranchCounts;
uint64_t TotalCounts = 0;
for (GCOVBlock::EdgeIterator I = Block.dst_begin(), E = Block.dst_end();
I != E; ++I) {
const GCOVEdge *Edge = *I;
BranchCounts.push_back(Edge->Count);
TotalCounts += Edge->Count;
if (Block.getCount()) ++Coverage.BranchesExec;
if (Edge->Count) ++Coverage.BranchesTaken;
++Coverage.Branches;
if (Options.FuncCoverage) {
const GCOVFunction *Function = &Block.getParent();
GCOVCoverage &FuncCoverage = FuncCoverages.find(Function)->second;
if (Block.getCount()) ++FuncCoverage.BranchesExec;
if (Edge->Count) ++FuncCoverage.BranchesTaken;
++FuncCoverage.Branches;
}
}
for (SmallVectorImpl<uint64_t>::const_iterator I = BranchCounts.begin(),
E = BranchCounts.end(); I != E; ++I) {
OS << format("branch %2u ", EdgeNo++)
<< formatBranchInfo(Options, *I, TotalCounts) << "\n";
}
}
/// printUncondBranchInfo - Print unconditional branch probabilities.
void FileInfo::printUncondBranchInfo(raw_fd_ostream &OS, uint32_t &EdgeNo,
uint64_t Count) const {
OS << format("unconditional %2u ", EdgeNo++)
<< formatBranchInfo(Options, Count, Count) << "\n";
}
// printCoverage - Print generic coverage info used by both printFuncCoverage
// and printFileCoverage.
void FileInfo::printCoverage(const GCOVCoverage &Coverage) const {
outs() << format("Lines executed:%.2f%% of %u\n",
double(Coverage.LinesExec)*100/Coverage.LogicalLines,
Coverage.LogicalLines);
if (Options.BranchInfo) {
if (Coverage.Branches) {
outs() << format("Branches executed:%.2f%% of %u\n",
double(Coverage.BranchesExec)*100/Coverage.Branches,
Coverage.Branches);
outs() << format("Taken at least once:%.2f%% of %u\n",
double(Coverage.BranchesTaken)*100/Coverage.Branches,
Coverage.Branches);
} else {
outs() << "No branches\n";
}
outs() << "No calls\n"; // to be consistent with gcov
}
}
// printFuncCoverage - Print per-function coverage info.
void FileInfo::printFuncCoverage() const {
for (MapVector<const GCOVFunction *, GCOVCoverage>::const_iterator I =
FuncCoverages.begin(), E = FuncCoverages.end(); I != E; ++I) {
const GCOVCoverage &Coverage = I->second;
outs() << "Function '" << Coverage.Name << "'\n";
printCoverage(Coverage);
outs() << "\n";
}
}
// printFileCoverage - Print per-file coverage info.
void FileInfo::printFileCoverage() const {
for (SmallVectorImpl<GCOVCoverage>::const_iterator I =
FileCoverages.begin(), E = FileCoverages.end(); I != E; ++I) {
const GCOVCoverage &Coverage = *I;
outs() << "File '" << Coverage.Name << "'\n";
printCoverage(Coverage);
outs() << Coverage.Name << ":creating '" << Coverage.Name
<< ".gcov'\n\n";
}
}
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