zequanwu updated this revision to Diff 554048.
zequanwu added a comment.
__llvm_prf_names section in the binary could be non-zero because
non-instrumented function names are store there to indicate execution of 0.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D157913/new/
https://reviews.llvm.org/D157913
Files:
clang/lib/CodeGen/CoverageMappingGen.cpp
clang/test/CodeGen/coverage-debug-info-correlate.c
compiler-rt/lib/profile/InstrProfilingWriter.c
compiler-rt/test/profile/Darwin/coverage-debug-info-correlate.cpp
compiler-rt/test/profile/Linux/coverage-debug-info-correlate.cpp
llvm/include/llvm/ProfileData/Coverage/CoverageMappingReader.h
llvm/include/llvm/ProfileData/InstrProf.h
llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
llvm/lib/ProfileData/InstrProfReader.cpp
Index: llvm/lib/ProfileData/InstrProfReader.cpp
===================================================================
--- llvm/lib/ProfileData/InstrProfReader.cpp
+++ llvm/lib/ProfileData/InstrProfReader.cpp
@@ -574,8 +574,8 @@
if (Correlator) {
// These sizes in the raw file are zero because we constructed them in the
// Correlator.
- assert(DataSize == 0 && NamesSize == 0);
- assert(CountersDelta == 0 && NamesDelta == 0);
+ assert(DataSize == 0 && (!isIRLevelProfile() || NamesSize == 0));
+ assert(CountersDelta == 0 && (!isIRLevelProfile() || NamesDelta == 0));
Data = Correlator->getDataPointer();
DataEnd = Data + Correlator->getDataSize();
NamesStart = Correlator->getNamesPointer();
Index: llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
===================================================================
--- llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
+++ llvm/lib/ProfileData/Coverage/CoverageMappingReader.cpp
@@ -25,6 +25,7 @@
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/ProfileData/InstrProfReader.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/Debug.h"
@@ -981,7 +982,8 @@
}
static Expected<std::unique_ptr<BinaryCoverageReader>>
-loadBinaryFormat(std::unique_ptr<Binary> Bin, StringRef Arch,
+loadBinaryFormat(std::unique_ptr<Binary> Bin,
+ IndexedInstrProfReader &ProfileReader, StringRef Arch,
StringRef CompilationDir = "",
object::BuildIDRef *BinaryID = nullptr) {
std::unique_ptr<ObjectFile> OF;
@@ -1010,11 +1012,21 @@
// Look for the sections that we are interested in.
auto ObjFormat = OF->getTripleObjectFormat();
+ InstrProfSymtab ProfileNames = ProfileReader.getSymtab();
auto NamesSection =
lookupSections(*OF, getInstrProfSectionName(IPSK_name, ObjFormat,
/*AddSegmentInfo=*/false));
- if (auto E = NamesSection.takeError())
- return std::move(E);
+ if (auto E = NamesSection.takeError()) {
+ if (ProfileNames.isEmpty())
+ return std::move(E);
+ consumeError(std::move(E));
+ } else {
+ std::vector<SectionRef> NamesSectionRefs = *NamesSection;
+ if (NamesSectionRefs.size() != 1)
+ return make_error<CoverageMapError>(coveragemap_error::malformed);
+ if (Error E = ProfileNames.create(NamesSectionRefs.back()))
+ return std::move(E);
+ }
auto CoverageSection =
lookupSections(*OF, getInstrProfSectionName(IPSK_covmap, ObjFormat,
/*AddSegmentInfo=*/false));
@@ -1028,13 +1040,6 @@
return CoverageMappingOrErr.takeError();
StringRef CoverageMapping = CoverageMappingOrErr.get();
- InstrProfSymtab ProfileNames;
- std::vector<SectionRef> NamesSectionRefs = *NamesSection;
- if (NamesSectionRefs.size() != 1)
- return make_error<CoverageMapError>(coveragemap_error::malformed);
- if (Error E = ProfileNames.create(NamesSectionRefs.back()))
- return std::move(E);
-
// Look for the coverage records section (Version4 only).
auto CoverageRecordsSections =
lookupSections(*OF, getInstrProfSectionName(IPSK_covfun, ObjFormat,
@@ -1104,7 +1109,8 @@
Expected<std::vector<std::unique_ptr<BinaryCoverageReader>>>
BinaryCoverageReader::create(
- MemoryBufferRef ObjectBuffer, StringRef Arch,
+ MemoryBufferRef ObjectBuffer, IndexedInstrProfReader &ProfileReader,
+ StringRef Arch,
SmallVectorImpl<std::unique_ptr<MemoryBuffer>> &ObjectFileBuffers,
StringRef CompilationDir, SmallVectorImpl<object::BuildIDRef> *BinaryIDs) {
std::vector<std::unique_ptr<BinaryCoverageReader>> Readers;
@@ -1150,8 +1156,8 @@
}
return BinaryCoverageReader::create(
- ArchiveOrErr.get()->getMemoryBufferRef(), Arch, ObjectFileBuffers,
- CompilationDir, BinaryIDs);
+ ArchiveOrErr.get()->getMemoryBufferRef(), ProfileReader, Arch,
+ ObjectFileBuffers, CompilationDir, BinaryIDs);
}
}
@@ -1164,8 +1170,8 @@
return ChildBufOrErr.takeError();
auto ChildReadersOrErr = BinaryCoverageReader::create(
- ChildBufOrErr.get(), Arch, ObjectFileBuffers, CompilationDir,
- BinaryIDs);
+ ChildBufOrErr.get(), ProfileReader, Arch, ObjectFileBuffers,
+ CompilationDir, BinaryIDs);
if (!ChildReadersOrErr)
return ChildReadersOrErr.takeError();
for (auto &Reader : ChildReadersOrErr.get())
@@ -1185,8 +1191,9 @@
}
object::BuildIDRef BinaryID;
- auto ReaderOrErr = loadBinaryFormat(std::move(Bin), Arch, CompilationDir,
- BinaryIDs ? &BinaryID : nullptr);
+ auto ReaderOrErr =
+ loadBinaryFormat(std::move(Bin), ProfileReader, Arch, CompilationDir,
+ BinaryIDs ? &BinaryID : nullptr);
if (!ReaderOrErr)
return ReaderOrErr.takeError();
Readers.push_back(std::move(ReaderOrErr.get()));
Index: llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
===================================================================
--- llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
+++ llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
@@ -360,7 +360,7 @@
SmallVector<object::BuildIDRef> BinaryIDs;
auto CoverageReadersOrErr = BinaryCoverageReader::create(
- CovMappingBufRef, Arch, Buffers, CompilationDir,
+ CovMappingBufRef, ProfileReader, Arch, Buffers, CompilationDir,
FoundBinaryIDs ? &BinaryIDs : nullptr);
if (Error E = CoverageReadersOrErr.takeError()) {
E = handleMaybeNoDataFoundError(std::move(E));
Index: llvm/include/llvm/ProfileData/InstrProf.h
===================================================================
--- llvm/include/llvm/ProfileData/InstrProf.h
+++ llvm/include/llvm/ProfileData/InstrProf.h
@@ -532,6 +532,11 @@
/// Dump the symbols in this table.
void dumpNames(raw_ostream &OS) const;
+
+ /// True if symbol table is empty.
+ bool isEmpty() {
+ return Data.empty() && NameTab.empty();
+ }
};
Error InstrProfSymtab::create(StringRef D, uint64_t BaseAddr) {
Index: llvm/include/llvm/ProfileData/Coverage/CoverageMappingReader.h
===================================================================
--- llvm/include/llvm/ProfileData/Coverage/CoverageMappingReader.h
+++ llvm/include/llvm/ProfileData/Coverage/CoverageMappingReader.h
@@ -203,7 +203,8 @@
BinaryCoverageReader &operator=(const BinaryCoverageReader &) = delete;
static Expected<std::vector<std::unique_ptr<BinaryCoverageReader>>>
- create(MemoryBufferRef ObjectBuffer, StringRef Arch,
+ create(MemoryBufferRef ObjectBuffer, IndexedInstrProfReader &ProfileReader,
+ StringRef Arch,
SmallVectorImpl<std::unique_ptr<MemoryBuffer>> &ObjectFileBuffers,
StringRef CompilationDir = "",
SmallVectorImpl<object::BuildIDRef> *BinaryIDs = nullptr);
Index: compiler-rt/test/profile/Linux/coverage-debug-info-correlate.cpp
===================================================================
--- /dev/null
+++ compiler-rt/test/profile/Linux/coverage-debug-info-correlate.cpp
@@ -0,0 +1,77 @@
+// Test debug info correlate with clang coverage.
+
+// Test the case when there is no __llvm_prf_names in the binary.
+// RUN: %clang_profgen -o %t.normal -fcoverage-mapping %S/../Inputs/instrprof-debug-info-correlate-main.cpp %S/../Inputs/instrprof-debug-info-correlate-foo.cpp
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t.profraw
+
+// RUN: %clang_profgen -o %t -g -mllvm --debug-info-correlate -fcoverage-mapping %S/../Inputs/instrprof-debug-info-correlate-main.cpp %S/../Inputs/instrprof-debug-info-correlate-foo.cpp
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t %t.profraw
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov report --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NONAME
+
+// Test debug info correlate with clang coverage (online merging).
+
+// RUN: env LLVM_PROFILE_FILE=%t-1.profraw %run %t.normal
+// RUN: env LLVM_PROFILE_FILE=%t-2.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t-1.profraw %t-2.profraw
+
+// RUN: rm -rf %t.profdir && mkdir %t.profdir
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t %t.profdir
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov report --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NONAME
+
+// NONAME: Filename Regions Missed Regions Cover Functions Missed Functions Executed Lines Missed Lines Cover Branches Missed Branches Cover
+// NONAME-NEXT: --
+// NONAME-NEXT: instrprof-debug-info-correlate-bar.h 3 1 66.67% 1 0 100.00% 5 1 80.00% 2 1 50.00%
+// NONAME-NEXT: instrprof-debug-info-correlate-foo.cpp 5 2 60.00% 2 1 50.00% 6 2 66.67% 2 1 50.00%
+// NONAME-NEXT: instrprof-debug-info-correlate-main.cpp 4 0 100.00% 1 0 100.00% 5 0 100.00% 2 0 100.00%
+// NONAME-NEXT: --
+// NONAME-NEXT: TOTAL 12 3 75.00% 4 1 75.00% 16 3 81.25% 6 2 66.67%
+
+// Test the case when there is __llvm_prf_names in the binary (those are names of uninstrumented functions).
+// RUN: %clang_profgen -o %t.normal -fcoverage-mapping -mllvm -enable-name-compression=false %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t.profraw
+
+// RUN: %clang_profgen -o %t -g -mllvm --debug-info-correlate -fcoverage-mapping -mllvm -enable-name-compression=false %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t %t.profraw
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov export --format=lcov --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NAME
+
+// Test debug info correlate with clang coverage (online merging).
+
+// RUN: env LLVM_PROFILE_FILE=%t-1.profraw %run %t.normal
+// RUN: env LLVM_PROFILE_FILE=%t-2.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t-1.profraw %t-2.profraw
+
+// RUN: rm -rf %t.profdir && mkdir %t.profdir
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t %t.profdir
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov export --format=lcov --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NAME
+// NAME: _Z9used_funcv
+// NAME: main
+// NAME: _ZN1A11unused_funcEv
+
+struct A {
+ void unused_func() {}
+};
+void used_func() {}
+int main() {
+ used_func();
+ return 0;
+}
Index: compiler-rt/test/profile/Darwin/coverage-debug-info-correlate.cpp
===================================================================
--- /dev/null
+++ compiler-rt/test/profile/Darwin/coverage-debug-info-correlate.cpp
@@ -0,0 +1,77 @@
+// Test debug info correlate with clang coverage.
+
+// Test the case when there is no __llvm_prf_names in the binary.
+// RUN: %clang_profgen -o %t.normal -fcoverage-mapping %S/../Inputs/instrprof-debug-info-correlate-main.cpp %S/../Inputs/instrprof-debug-info-correlate-foo.cpp
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t.profraw
+
+// RUN: %clang_profgen -o %t -g -mllvm --debug-info-correlate -fcoverage-mapping %S/../Inputs/instrprof-debug-info-correlate-main.cpp %S/../Inputs/instrprof-debug-info-correlate-foo.cpp
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t.dSYM %t.profraw
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov report --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NONAME
+
+// Test debug info correlate with clang coverage (online merging).
+
+// RUN: env LLVM_PROFILE_FILE=%t-1.profraw %run %t.normal
+// RUN: env LLVM_PROFILE_FILE=%t-2.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t-1.profraw %t-2.profraw
+
+// RUN: rm -rf %t.profdir && mkdir %t.profdir
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t.dSYM %t.profdir
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov report --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NONAME
+
+// NONAME: Filename Regions Missed Regions Cover Functions Missed Functions Executed Lines Missed Lines Cover Branches Missed Branches Cover
+// NONAME-NEXT: --
+// NONAME-NEXT: instrprof-debug-info-correlate-bar.h 3 1 66.67% 1 0 100.00% 5 1 80.00% 2 1 50.00%
+// NONAME-NEXT: instrprof-debug-info-correlate-foo.cpp 5 2 60.00% 2 1 50.00% 6 2 66.67% 2 1 50.00%
+// NONAME-NEXT: instrprof-debug-info-correlate-main.cpp 4 0 100.00% 1 0 100.00% 5 0 100.00% 2 0 100.00%
+// NONAME-NEXT: --
+// NONAME-NEXT: TOTAL 12 3 75.00% 4 1 75.00% 16 3 81.25% 6 2 66.67%
+
+// Test the case when there is __llvm_prf_names in the binary (those are names of uninstrumented functions).
+// RUN: %clang_profgen -o %t.normal -fcoverage-mapping -mllvm -enable-name-compression=false %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t.profraw
+
+// RUN: %clang_profgen -o %t -g -mllvm --debug-info-correlate -fcoverage-mapping -mllvm -enable-name-compression=false %s
+// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t.dSYM %t.profraw
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov export --format=lcov --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NAME
+
+// Test debug info correlate with clang coverage (online merging).
+
+// RUN: env LLVM_PROFILE_FILE=%t-1.profraw %run %t.normal
+// RUN: env LLVM_PROFILE_FILE=%t-2.profraw %run %t.normal
+// RUN: llvm-profdata merge -o %t.normal.profdata %t-1.profraw %t-2.profraw
+
+// RUN: rm -rf %t.profdir && mkdir %t.profdir
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
+// RUN: llvm-profdata merge -o %t.profdata --debug-info=%t.dSYM %t.profdir
+
+// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-cov export --format=lcov --instr-profile=%t.profdata %t | FileCheck %s -check-prefix=NAME
+// NAME: _Z9used_funcv
+// NAME: main
+// NAME: _ZN1A11unused_funcEv
+
+struct A {
+ void unused_func() {}
+};
+void used_func() {}
+int main() {
+ used_func();
+ return 0;
+}
Index: compiler-rt/lib/profile/InstrProfilingWriter.c
===================================================================
--- compiler-rt/lib/profile/InstrProfilingWriter.c
+++ compiler-rt/lib/profile/InstrProfilingWriter.c
@@ -261,7 +261,9 @@
const char *NamesEnd, int SkipNameDataWrite) {
int DebugInfoCorrelate =
(__llvm_profile_get_version() & VARIANT_MASK_DBG_CORRELATE) != 0ULL;
-
+ int IRLevelProfile =
+ (__llvm_profile_get_version() & VARIANT_MASK_IR_PROF) != 0ULL;
+
/* Calculate size of sections. */
const uint64_t DataSectionSize =
DebugInfoCorrelate ? 0 : __llvm_profile_get_data_size(DataBegin, DataEnd);
@@ -271,7 +273,8 @@
__llvm_profile_get_counters_size(CountersBegin, CountersEnd);
const uint64_t NumCounters =
__llvm_profile_get_num_counters(CountersBegin, CountersEnd);
- const uint64_t NamesSize = DebugInfoCorrelate ? 0 : NamesEnd - NamesBegin;
+ const uint64_t NamesSize =
+ DebugInfoCorrelate && IRLevelProfile ? 0 : NamesEnd - NamesBegin;
/* Create the header. */
__llvm_profile_header Header;
@@ -297,10 +300,12 @@
Header.CountersDelta = (uint32_t)Header.CountersDelta;
#endif
- /* The data and names sections are omitted in lightweight mode. */
+ /* The data section is omitted in lightweight mode. */
if (DebugInfoCorrelate) {
Header.CountersDelta = 0;
- Header.NamesDelta = 0;
+ if (IRLevelProfile) {
+ Header.NamesDelta = 0;
+ }
}
/* Write the profile header. */
@@ -319,7 +324,9 @@
{NULL, sizeof(uint8_t), PaddingBytesBeforeCounters, 1},
{CountersBegin, sizeof(uint8_t), CountersSectionSize, 0},
{NULL, sizeof(uint8_t), PaddingBytesAfterCounters, 1},
- {(SkipNameDataWrite || DebugInfoCorrelate) ? NULL : NamesBegin,
+ {(SkipNameDataWrite || (DebugInfoCorrelate && IRLevelProfile))
+ ? NULL
+ : NamesBegin,
sizeof(uint8_t), NamesSize, 0},
{NULL, sizeof(uint8_t), PaddingBytesAfterNames, 1}};
if (Writer->Write(Writer, IOVecData, sizeof(IOVecData) / sizeof(*IOVecData)))
Index: clang/test/CodeGen/coverage-debug-info-correlate.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/coverage-debug-info-correlate.c
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -debug-info-kind=standalone -mllvm -debug-info-correlate -fprofile-instrument=clang -fcoverage-mapping -emit-llvm -o - %s | FileCheck %s
+
+// CHECK: @__llvm_profile_raw_version = hidden constant i64 576460752303423496, comdat
+int main() {
+ return 0;
+}
Index: clang/lib/CodeGen/CoverageMappingGen.cpp
===================================================================
--- clang/lib/CodeGen/CoverageMappingGen.cpp
+++ clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -31,6 +31,10 @@
// is textually included.
#define COVMAP_V3
+namespace llvm {
+extern cl::opt<bool> DebugInfoCorrelate;
+} // namespace llvm
+
static llvm::cl::opt<bool> EmptyLineCommentCoverage(
"emptyline-comment-coverage",
llvm::cl::desc("Emit emptylines and comment lines as skipped regions (only "
@@ -1821,6 +1825,22 @@
llvm::GlobalValue::InternalLinkage, NamesArrVal,
llvm::getCoverageUnusedNamesVarName());
}
+ const StringRef VarName(INSTR_PROF_QUOTE(INSTR_PROF_RAW_VERSION_VAR));
+ llvm::Type *IntTy64 = llvm::Type::getInt64Ty(Ctx);
+ uint64_t ProfileVersion = INSTR_PROF_RAW_VERSION;
+ if (llvm::DebugInfoCorrelate)
+ ProfileVersion |= VARIANT_MASK_DBG_CORRELATE;
+ auto *VersionVariable = new llvm::GlobalVariable(
+ CGM.getModule(), llvm::Type::getInt64Ty(Ctx), true,
+ llvm::GlobalValue::WeakAnyLinkage,
+ llvm::Constant::getIntegerValue(IntTy64, llvm::APInt(64, ProfileVersion)),
+ VarName);
+ VersionVariable->setVisibility(llvm::GlobalValue::HiddenVisibility);
+ llvm::Triple TT(CGM.getModule().getTargetTriple());
+ if (TT.supportsCOMDAT()) {
+ VersionVariable->setLinkage(llvm::GlobalValue::ExternalLinkage);
+ VersionVariable->setComdat(CGM.getModule().getOrInsertComdat(VarName));
+ }
}
unsigned CoverageMappingModuleGen::getFileID(const FileEntry *File) {
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