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-rw-r--r--lib/Transforms/Instrumentation/GCOVProfiling.cpp404
1 files changed, 193 insertions, 211 deletions
diff --git a/lib/Transforms/Instrumentation/GCOVProfiling.cpp b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
index 132e8089fe3b..9af64ed332cd 100644
--- a/lib/Transforms/Instrumentation/GCOVProfiling.cpp
+++ b/lib/Transforms/Instrumentation/GCOVProfiling.cpp
@@ -21,9 +21,9 @@
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/UniqueVector.h"
#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/IR/CFG.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/IRBuilder.h"
@@ -36,6 +36,7 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
+#include "llvm/Support/Regex.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Instrumentation.h"
#include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
@@ -96,30 +97,25 @@ private:
// profiling runtime to emit .gcda files when run.
bool emitProfileArcs();
+ bool isFunctionInstrumented(const Function &F);
+ std::vector<Regex> createRegexesFromString(StringRef RegexesStr);
+ static bool doesFilenameMatchARegex(StringRef Filename,
+ std::vector<Regex> &Regexes);
+
// Get pointers to the functions in the runtime library.
Constant *getStartFileFunc();
- Constant *getIncrementIndirectCounterFunc();
Constant *getEmitFunctionFunc();
Constant *getEmitArcsFunc();
Constant *getSummaryInfoFunc();
Constant *getEndFileFunc();
- // Create or retrieve an i32 state value that is used to represent the
- // pred block number for certain non-trivial edges.
- GlobalVariable *getEdgeStateValue();
-
- // Produce a table of pointers to counters, by predecessor and successor
- // block number.
- GlobalVariable *buildEdgeLookupTable(Function *F, GlobalVariable *Counter,
- const UniqueVector<BasicBlock *> &Preds,
- const UniqueVector<BasicBlock *> &Succs);
-
// Add the function to write out all our counters to the global destructor
// list.
Function *
insertCounterWriteout(ArrayRef<std::pair<GlobalVariable *, MDNode *>>);
Function *insertFlush(ArrayRef<std::pair<GlobalVariable *, MDNode *>>);
- void insertIndirectCounterIncrement();
+
+ void AddFlushBeforeForkAndExec();
enum class GCovFileType { GCNO, GCDA };
std::string mangleName(const DICompileUnit *CU, GCovFileType FileType);
@@ -135,6 +131,9 @@ private:
const TargetLibraryInfo *TLI;
LLVMContext *Ctx;
SmallVector<std::unique_ptr<GCOVFunction>, 16> Funcs;
+ std::vector<Regex> FilterRe;
+ std::vector<Regex> ExcludeRe;
+ StringMap<bool> InstrumentedFiles;
};
class GCOVProfilerLegacyPass : public ModulePass {
@@ -181,6 +180,21 @@ static StringRef getFunctionName(const DISubprogram *SP) {
return SP->getName();
}
+/// Extract a filename for a DISubprogram.
+///
+/// Prefer relative paths in the coverage notes. Clang also may split
+/// up absolute paths into a directory and filename component. When
+/// the relative path doesn't exist, reconstruct the absolute path.
+static SmallString<128> getFilename(const DISubprogram *SP) {
+ SmallString<128> Path;
+ StringRef RelPath = SP->getFilename();
+ if (sys::fs::exists(RelPath))
+ Path = RelPath;
+ else
+ sys::path::append(Path, SP->getDirectory(), SP->getFilename());
+ return Path;
+}
+
namespace {
class GCOVRecord {
protected:
@@ -257,7 +271,7 @@ namespace {
}
private:
- StringRef Filename;
+ std::string Filename;
SmallVector<uint32_t, 32> Lines;
};
@@ -287,11 +301,10 @@ namespace {
write(Len);
write(Number);
- llvm::sort(
- SortedLinesByFile.begin(), SortedLinesByFile.end(),
- [](StringMapEntry<GCOVLines> *LHS, StringMapEntry<GCOVLines> *RHS) {
- return LHS->getKey() < RHS->getKey();
- });
+ llvm::sort(SortedLinesByFile, [](StringMapEntry<GCOVLines> *LHS,
+ StringMapEntry<GCOVLines> *RHS) {
+ return LHS->getKey() < RHS->getKey();
+ });
for (auto &I : SortedLinesByFile)
I->getValue().writeOut();
write(0);
@@ -379,8 +392,9 @@ namespace {
void writeOut() {
writeBytes(FunctionTag, 4);
+ SmallString<128> Filename = getFilename(SP);
uint32_t BlockLen = 1 + 1 + 1 + lengthOfGCOVString(getFunctionName(SP)) +
- 1 + lengthOfGCOVString(SP->getFilename()) + 1;
+ 1 + lengthOfGCOVString(Filename) + 1;
if (UseCfgChecksum)
++BlockLen;
write(BlockLen);
@@ -389,7 +403,7 @@ namespace {
if (UseCfgChecksum)
write(CfgChecksum);
writeGCOVString(getFunctionName(SP));
- writeGCOVString(SP->getFilename());
+ writeGCOVString(Filename);
write(SP->getLine());
// Emit count of blocks.
@@ -434,6 +448,72 @@ namespace {
};
}
+// RegexesStr is a string containing differents regex separated by a semi-colon.
+// For example "foo\..*$;bar\..*$".
+std::vector<Regex> GCOVProfiler::createRegexesFromString(StringRef RegexesStr) {
+ std::vector<Regex> Regexes;
+ while (!RegexesStr.empty()) {
+ std::pair<StringRef, StringRef> HeadTail = RegexesStr.split(';');
+ if (!HeadTail.first.empty()) {
+ Regex Re(HeadTail.first);
+ std::string Err;
+ if (!Re.isValid(Err)) {
+ Ctx->emitError(Twine("Regex ") + HeadTail.first +
+ " is not valid: " + Err);
+ }
+ Regexes.emplace_back(std::move(Re));
+ }
+ RegexesStr = HeadTail.second;
+ }
+ return Regexes;
+}
+
+bool GCOVProfiler::doesFilenameMatchARegex(StringRef Filename,
+ std::vector<Regex> &Regexes) {
+ for (Regex &Re : Regexes) {
+ if (Re.match(Filename)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+bool GCOVProfiler::isFunctionInstrumented(const Function &F) {
+ if (FilterRe.empty() && ExcludeRe.empty()) {
+ return true;
+ }
+ SmallString<128> Filename = getFilename(F.getSubprogram());
+ auto It = InstrumentedFiles.find(Filename);
+ if (It != InstrumentedFiles.end()) {
+ return It->second;
+ }
+
+ SmallString<256> RealPath;
+ StringRef RealFilename;
+
+ // Path can be
+ // /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/*.h so for
+ // such a case we must get the real_path.
+ if (sys::fs::real_path(Filename, RealPath)) {
+ // real_path can fail with path like "foo.c".
+ RealFilename = Filename;
+ } else {
+ RealFilename = RealPath;
+ }
+
+ bool ShouldInstrument;
+ if (FilterRe.empty()) {
+ ShouldInstrument = !doesFilenameMatchARegex(RealFilename, ExcludeRe);
+ } else if (ExcludeRe.empty()) {
+ ShouldInstrument = doesFilenameMatchARegex(RealFilename, FilterRe);
+ } else {
+ ShouldInstrument = doesFilenameMatchARegex(RealFilename, FilterRe) &&
+ !doesFilenameMatchARegex(RealFilename, ExcludeRe);
+ }
+ InstrumentedFiles[Filename] = ShouldInstrument;
+ return ShouldInstrument;
+}
+
std::string GCOVProfiler::mangleName(const DICompileUnit *CU,
GCovFileType OutputType) {
bool Notes = OutputType == GCovFileType::GCNO;
@@ -481,6 +561,11 @@ bool GCOVProfiler::runOnModule(Module &M, const TargetLibraryInfo &TLI) {
this->TLI = &TLI;
Ctx = &M.getContext();
+ AddFlushBeforeForkAndExec();
+
+ FilterRe = createRegexesFromString(Options.Filter);
+ ExcludeRe = createRegexesFromString(Options.Exclude);
+
if (Options.EmitNotes) emitProfileNotes();
if (Options.EmitData) return emitProfileArcs();
return false;
@@ -537,6 +622,38 @@ static bool shouldKeepInEntry(BasicBlock::iterator It) {
return false;
}
+void GCOVProfiler::AddFlushBeforeForkAndExec() {
+ SmallVector<Instruction *, 2> ForkAndExecs;
+ for (auto &F : M->functions()) {
+ for (auto &I : instructions(F)) {
+ if (CallInst *CI = dyn_cast<CallInst>(&I)) {
+ if (Function *Callee = CI->getCalledFunction()) {
+ LibFunc LF;
+ if (TLI->getLibFunc(*Callee, LF) &&
+ (LF == LibFunc_fork || LF == LibFunc_execl ||
+ LF == LibFunc_execle || LF == LibFunc_execlp ||
+ LF == LibFunc_execv || LF == LibFunc_execvp ||
+ LF == LibFunc_execve || LF == LibFunc_execvpe ||
+ LF == LibFunc_execvP)) {
+ ForkAndExecs.push_back(&I);
+ }
+ }
+ }
+ }
+ }
+
+ // We need to split the block after the fork/exec call
+ // because else the counters for the lines after will be
+ // the same as before the call.
+ for (auto I : ForkAndExecs) {
+ IRBuilder<> Builder(I);
+ FunctionType *FTy = FunctionType::get(Builder.getVoidTy(), {}, false);
+ Constant *GCOVFlush = M->getOrInsertFunction("__gcov_flush", FTy);
+ Builder.CreateCall(GCOVFlush);
+ I->getParent()->splitBasicBlock(I);
+ }
+}
+
void GCOVProfiler::emitProfileNotes() {
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (!CU_Nodes) return;
@@ -566,7 +683,8 @@ void GCOVProfiler::emitProfileNotes() {
for (auto &F : M->functions()) {
DISubprogram *SP = F.getSubprogram();
if (!SP) continue;
- if (!functionHasLines(F)) continue;
+ if (!functionHasLines(F) || !isFunctionInstrumented(F))
+ continue;
// TODO: Functions using scope-based EH are currently not supported.
if (isUsingScopeBasedEH(F)) continue;
@@ -583,9 +701,15 @@ void GCOVProfiler::emitProfileNotes() {
Options.ExitBlockBeforeBody));
GCOVFunction &Func = *Funcs.back();
+ // Add the function line number to the lines of the entry block
+ // to have a counter for the function definition.
+ uint32_t Line = SP->getLine();
+ auto Filename = getFilename(SP);
+ Func.getBlock(&EntryBlock).getFile(Filename).addLine(Line);
+
for (auto &BB : F) {
GCOVBlock &Block = Func.getBlock(&BB);
- TerminatorInst *TI = BB.getTerminator();
+ Instruction *TI = BB.getTerminator();
if (int successors = TI->getNumSuccessors()) {
for (int i = 0; i != successors; ++i) {
Block.addEdge(Func.getBlock(TI->getSuccessor(i)));
@@ -594,7 +718,6 @@ void GCOVProfiler::emitProfileNotes() {
Block.addEdge(Func.getReturnBlock());
}
- uint32_t Line = 0;
for (auto &I : BB) {
// Debug intrinsic locations correspond to the location of the
// declaration, not necessarily any statements or expressions.
@@ -605,16 +728,18 @@ void GCOVProfiler::emitProfileNotes() {
continue;
// Artificial lines such as calls to the global constructors.
- if (Loc.getLine() == 0) continue;
+ if (Loc.getLine() == 0 || Loc.isImplicitCode())
+ continue;
if (Line == Loc.getLine()) continue;
Line = Loc.getLine();
if (SP != getDISubprogram(Loc.getScope()))
continue;
- GCOVLines &Lines = Block.getFile(SP->getFilename());
+ GCOVLines &Lines = Block.getFile(Filename);
Lines.addLine(Loc.getLine());
}
+ Line = 0;
}
EdgeDestinations += Func.getEdgeDestinations();
}
@@ -639,24 +764,28 @@ bool GCOVProfiler::emitProfileArcs() {
if (!CU_Nodes) return false;
bool Result = false;
- bool InsertIndCounterIncrCode = false;
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
SmallVector<std::pair<GlobalVariable *, MDNode *>, 8> CountersBySP;
for (auto &F : M->functions()) {
DISubprogram *SP = F.getSubprogram();
if (!SP) continue;
- if (!functionHasLines(F)) continue;
+ if (!functionHasLines(F) || !isFunctionInstrumented(F))
+ continue;
// TODO: Functions using scope-based EH are currently not supported.
if (isUsingScopeBasedEH(F)) continue;
if (!Result) Result = true;
+ DenseMap<std::pair<BasicBlock *, BasicBlock *>, unsigned> EdgeToCounter;
unsigned Edges = 0;
for (auto &BB : F) {
- TerminatorInst *TI = BB.getTerminator();
- if (isa<ReturnInst>(TI))
- ++Edges;
- else
- Edges += TI->getNumSuccessors();
+ Instruction *TI = BB.getTerminator();
+ if (isa<ReturnInst>(TI)) {
+ EdgeToCounter[{&BB, nullptr}] = Edges++;
+ } else {
+ for (BasicBlock *Succ : successors(TI)) {
+ EdgeToCounter[{&BB, Succ}] = Edges++;
+ }
+ }
}
ArrayType *CounterTy =
@@ -668,63 +797,42 @@ bool GCOVProfiler::emitProfileArcs() {
"__llvm_gcov_ctr");
CountersBySP.push_back(std::make_pair(Counters, SP));
- UniqueVector<BasicBlock *> ComplexEdgePreds;
- UniqueVector<BasicBlock *> ComplexEdgeSuccs;
-
- unsigned Edge = 0;
+ // If a BB has several predecessors, use a PHINode to select
+ // the correct counter.
for (auto &BB : F) {
- TerminatorInst *TI = BB.getTerminator();
- int Successors = isa<ReturnInst>(TI) ? 1 : TI->getNumSuccessors();
- if (Successors) {
- if (Successors == 1) {
- IRBuilder<> Builder(&*BB.getFirstInsertionPt());
- Value *Counter = Builder.CreateConstInBoundsGEP2_64(Counters, 0,
- Edge);
- Value *Count = Builder.CreateLoad(Counter);
- Count = Builder.CreateAdd(Count, Builder.getInt64(1));
- Builder.CreateStore(Count, Counter);
- } else if (BranchInst *BI = dyn_cast<BranchInst>(TI)) {
- IRBuilder<> Builder(BI);
- Value *Sel = Builder.CreateSelect(BI->getCondition(),
- Builder.getInt64(Edge),
- Builder.getInt64(Edge + 1));
- Value *Counter = Builder.CreateInBoundsGEP(
- Counters->getValueType(), Counters, {Builder.getInt64(0), Sel});
+ const unsigned EdgeCount =
+ std::distance(pred_begin(&BB), pred_end(&BB));
+ if (EdgeCount) {
+ // The phi node must be at the begin of the BB.
+ IRBuilder<> BuilderForPhi(&*BB.begin());
+ Type *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
+ PHINode *Phi = BuilderForPhi.CreatePHI(Int64PtrTy, EdgeCount);
+ for (BasicBlock *Pred : predecessors(&BB)) {
+ auto It = EdgeToCounter.find({Pred, &BB});
+ assert(It != EdgeToCounter.end());
+ const unsigned Edge = It->second;
+ Value *EdgeCounter =
+ BuilderForPhi.CreateConstInBoundsGEP2_64(Counters, 0, Edge);
+ Phi->addIncoming(EdgeCounter, Pred);
+ }
+
+ // Skip phis, landingpads.
+ IRBuilder<> Builder(&*BB.getFirstInsertionPt());
+ Value *Count = Builder.CreateLoad(Phi);
+ Count = Builder.CreateAdd(Count, Builder.getInt64(1));
+ Builder.CreateStore(Count, Phi);
+
+ Instruction *TI = BB.getTerminator();
+ if (isa<ReturnInst>(TI)) {
+ auto It = EdgeToCounter.find({&BB, nullptr});
+ assert(It != EdgeToCounter.end());
+ const unsigned Edge = It->second;
+ Value *Counter =
+ Builder.CreateConstInBoundsGEP2_64(Counters, 0, Edge);
Value *Count = Builder.CreateLoad(Counter);
Count = Builder.CreateAdd(Count, Builder.getInt64(1));
Builder.CreateStore(Count, Counter);
- } else {
- ComplexEdgePreds.insert(&BB);
- for (int i = 0; i != Successors; ++i)
- ComplexEdgeSuccs.insert(TI->getSuccessor(i));
}
-
- Edge += Successors;
- }
- }
-
- if (!ComplexEdgePreds.empty()) {
- GlobalVariable *EdgeTable =
- buildEdgeLookupTable(&F, Counters,
- ComplexEdgePreds, ComplexEdgeSuccs);
- GlobalVariable *EdgeState = getEdgeStateValue();
-
- for (int i = 0, e = ComplexEdgePreds.size(); i != e; ++i) {
- IRBuilder<> Builder(&*ComplexEdgePreds[i + 1]->getFirstInsertionPt());
- Builder.CreateStore(Builder.getInt32(i), EdgeState);
- }
-
- for (int i = 0, e = ComplexEdgeSuccs.size(); i != e; ++i) {
- // Call runtime to perform increment.
- IRBuilder<> Builder(&*ComplexEdgeSuccs[i + 1]->getFirstInsertionPt());
- Value *CounterPtrArray =
- Builder.CreateConstInBoundsGEP2_64(EdgeTable, 0,
- i * ComplexEdgePreds.size());
-
- // Build code to increment the counter.
- InsertIndCounterIncrCode = true;
- Builder.CreateCall(getIncrementIndirectCounterFunc(),
- {EdgeState, CounterPtrArray});
}
}
}
@@ -763,60 +871,9 @@ bool GCOVProfiler::emitProfileArcs() {
appendToGlobalCtors(*M, F, 0);
}
- if (InsertIndCounterIncrCode)
- insertIndirectCounterIncrement();
-
return Result;
}
-// All edges with successors that aren't branches are "complex", because it
-// requires complex logic to pick which counter to update.
-GlobalVariable *GCOVProfiler::buildEdgeLookupTable(
- Function *F,
- GlobalVariable *Counters,
- const UniqueVector<BasicBlock *> &Preds,
- const UniqueVector<BasicBlock *> &Succs) {
- // TODO: support invoke, threads. We rely on the fact that nothing can modify
- // the whole-Module pred edge# between the time we set it and the time we next
- // read it. Threads and invoke make this untrue.
-
- // emit [(succs * preds) x i64*], logically [succ x [pred x i64*]].
- size_t TableSize = Succs.size() * Preds.size();
- Type *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
- ArrayType *EdgeTableTy = ArrayType::get(Int64PtrTy, TableSize);
-
- std::unique_ptr<Constant * []> EdgeTable(new Constant *[TableSize]);
- Constant *NullValue = Constant::getNullValue(Int64PtrTy);
- for (size_t i = 0; i != TableSize; ++i)
- EdgeTable[i] = NullValue;
-
- unsigned Edge = 0;
- for (BasicBlock &BB : *F) {
- TerminatorInst *TI = BB.getTerminator();
- int Successors = isa<ReturnInst>(TI) ? 1 : TI->getNumSuccessors();
- if (Successors > 1 && !isa<BranchInst>(TI) && !isa<ReturnInst>(TI)) {
- for (int i = 0; i != Successors; ++i) {
- BasicBlock *Succ = TI->getSuccessor(i);
- IRBuilder<> Builder(Succ);
- Value *Counter = Builder.CreateConstInBoundsGEP2_64(Counters, 0,
- Edge + i);
- EdgeTable[((Succs.idFor(Succ) - 1) * Preds.size()) +
- (Preds.idFor(&BB) - 1)] = cast<Constant>(Counter);
- }
- }
- Edge += Successors;
- }
-
- GlobalVariable *EdgeTableGV =
- new GlobalVariable(
- *M, EdgeTableTy, true, GlobalValue::InternalLinkage,
- ConstantArray::get(EdgeTableTy,
- makeArrayRef(&EdgeTable[0],TableSize)),
- "__llvm_gcda_edge_table");
- EdgeTableGV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
- return EdgeTableGV;
-}
-
Constant *GCOVProfiler::getStartFileFunc() {
Type *Args[] = {
Type::getInt8PtrTy(*Ctx), // const char *orig_filename
@@ -832,17 +889,6 @@ Constant *GCOVProfiler::getStartFileFunc() {
}
-Constant *GCOVProfiler::getIncrementIndirectCounterFunc() {
- Type *Int32Ty = Type::getInt32Ty(*Ctx);
- Type *Int64Ty = Type::getInt64Ty(*Ctx);
- Type *Args[] = {
- Int32Ty->getPointerTo(), // uint32_t *predecessor
- Int64Ty->getPointerTo()->getPointerTo() // uint64_t **counters
- };
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), Args, false);
- return M->getOrInsertFunction("__llvm_gcov_indirect_counter_increment", FTy);
-}
-
Constant *GCOVProfiler::getEmitFunctionFunc() {
Type *Args[] = {
Type::getInt32Ty(*Ctx), // uint32_t ident
@@ -886,19 +932,6 @@ Constant *GCOVProfiler::getEndFileFunc() {
return M->getOrInsertFunction("llvm_gcda_end_file", FTy);
}
-GlobalVariable *GCOVProfiler::getEdgeStateValue() {
- GlobalVariable *GV = M->getGlobalVariable("__llvm_gcov_global_state_pred");
- if (!GV) {
- GV = new GlobalVariable(*M, Type::getInt32Ty(*Ctx), false,
- GlobalValue::InternalLinkage,
- ConstantInt::get(Type::getInt32Ty(*Ctx),
- 0xffffffff),
- "__llvm_gcov_global_state_pred");
- GV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
- }
- return GV;
-}
-
Function *GCOVProfiler::insertCounterWriteout(
ArrayRef<std::pair<GlobalVariable *, MDNode *> > CountersBySP) {
FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
@@ -1122,57 +1155,6 @@ Function *GCOVProfiler::insertCounterWriteout(
return WriteoutF;
}
-void GCOVProfiler::insertIndirectCounterIncrement() {
- Function *Fn =
- cast<Function>(GCOVProfiler::getIncrementIndirectCounterFunc());
- Fn->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
- Fn->setLinkage(GlobalValue::InternalLinkage);
- Fn->addFnAttr(Attribute::NoInline);
- if (Options.NoRedZone)
- Fn->addFnAttr(Attribute::NoRedZone);
-
- // Create basic blocks for function.
- BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", Fn);
- IRBuilder<> Builder(BB);
-
- BasicBlock *PredNotNegOne = BasicBlock::Create(*Ctx, "", Fn);
- BasicBlock *CounterEnd = BasicBlock::Create(*Ctx, "", Fn);
- BasicBlock *Exit = BasicBlock::Create(*Ctx, "exit", Fn);
-
- // uint32_t pred = *predecessor;
- // if (pred == 0xffffffff) return;
- Argument *Arg = &*Fn->arg_begin();
- Arg->setName("predecessor");
- Value *Pred = Builder.CreateLoad(Arg, "pred");
- Value *Cond = Builder.CreateICmpEQ(Pred, Builder.getInt32(0xffffffff));
- BranchInst::Create(Exit, PredNotNegOne, Cond, BB);
-
- Builder.SetInsertPoint(PredNotNegOne);
-
- // uint64_t *counter = counters[pred];
- // if (!counter) return;
- Value *ZExtPred = Builder.CreateZExt(Pred, Builder.getInt64Ty());
- Arg = &*std::next(Fn->arg_begin());
- Arg->setName("counters");
- Value *GEP = Builder.CreateGEP(Type::getInt64PtrTy(*Ctx), Arg, ZExtPred);
- Value *Counter = Builder.CreateLoad(GEP, "counter");
- Cond = Builder.CreateICmpEQ(Counter,
- Constant::getNullValue(
- Builder.getInt64Ty()->getPointerTo()));
- Builder.CreateCondBr(Cond, Exit, CounterEnd);
-
- // ++*counter;
- Builder.SetInsertPoint(CounterEnd);
- Value *Add = Builder.CreateAdd(Builder.CreateLoad(Counter),
- Builder.getInt64(1));
- Builder.CreateStore(Add, Counter);
- Builder.CreateBr(Exit);
-
- // Fill in the exit block.
- Builder.SetInsertPoint(Exit);
- Builder.CreateRetVoid();
-}
-
Function *GCOVProfiler::
insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> > CountersBySP) {
FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
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