#define DEBUG_TYPE "insert-gcov-profiling"
-#include "ProfilingUtils.h"
#include "llvm/Transforms/Instrumentation.h"
-#include "llvm/DebugInfo.h"
-#include "llvm/IRBuilder.h"
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
-#include "llvm/Pass.h"
+#include "ProfilingUtils.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/UniqueVector.h"
+#include "llvm/DebugInfo.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Pass.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/DebugLoc.h"
#include "llvm/Support/InstIterator.h"
static char ID;
GCOVProfiler()
: ModulePass(ID), EmitNotes(true), EmitData(true), Use402Format(false),
- UseExtraChecksum(false) {
+ UseExtraChecksum(false), NoRedZone(false) {
initializeGCOVProfilerPass(*PassRegistry::getPassRegistry());
}
- GCOVProfiler(bool EmitNotes, bool EmitData, bool use402Format = false,
- bool useExtraChecksum = false)
+ GCOVProfiler(bool EmitNotes, bool EmitData, bool use402Format,
+ bool useExtraChecksum, bool NoRedZone_)
: ModulePass(ID), EmitNotes(EmitNotes), EmitData(EmitData),
- Use402Format(use402Format), UseExtraChecksum(useExtraChecksum) {
+ Use402Format(use402Format), UseExtraChecksum(useExtraChecksum),
+ NoRedZone(NoRedZone_) {
assert((EmitNotes || EmitData) && "GCOVProfiler asked to do nothing?");
initializeGCOVProfilerPass(*PassRegistry::getPassRegistry());
}
// Add the function to write out all our counters to the global destructor
// list.
- void insertCounterWriteout(SmallVector<std::pair<GlobalVariable *,
- MDNode *>, 8> &);
+ void insertCounterWriteout(ArrayRef<std::pair<GlobalVariable*, MDNode*> >);
void insertIndirectCounterIncrement();
+ void insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> >);
- std::string mangleName(DICompileUnit CU, std::string NewStem);
+ std::string mangleName(DICompileUnit CU, const char *NewStem);
bool EmitNotes;
bool EmitData;
bool Use402Format;
bool UseExtraChecksum;
+ bool NoRedZone;
Module *M;
LLVMContext *Ctx;
ModulePass *llvm::createGCOVProfilerPass(bool EmitNotes, bool EmitData,
bool Use402Format,
- bool UseExtraChecksum) {
- return new GCOVProfiler(EmitNotes, EmitData, Use402Format, UseExtraChecksum);
+ bool UseExtraChecksum,
+ bool NoRedZone) {
+ return new GCOVProfiler(EmitNotes, EmitData, Use402Format, UseExtraChecksum,
+ NoRedZone);
}
namespace {
};
}
-std::string GCOVProfiler::mangleName(DICompileUnit CU, std::string NewStem) {
+std::string GCOVProfiler::mangleName(DICompileUnit CU, const char *NewStem) {
if (NamedMDNode *GCov = M->getNamedMetadata("llvm.gcov")) {
for (int i = 0, e = GCov->getNumOperands(); i != e; ++i) {
MDNode *N = GCov->getOperand(i);
Value *Counter = Builder.CreateConstInBoundsGEP2_64(Counters, 0,
Edge);
Value *Count = Builder.CreateLoad(Counter);
- Count = Builder.CreateAdd(Count,
- ConstantInt::get(Type::getInt64Ty(*Ctx),1));
+ Count = Builder.CreateAdd(Count, Builder.getInt64(1));
Builder.CreateStore(Count, Counter);
} else if (BranchInst *BI = dyn_cast<BranchInst>(TI)) {
- Value *Sel = Builder.CreateSelect(
- BI->getCondition(),
- ConstantInt::get(Type::getInt64Ty(*Ctx), Edge),
- ConstantInt::get(Type::getInt64Ty(*Ctx), Edge + 1));
+ Value *Sel = Builder.CreateSelect(BI->getCondition(),
+ Builder.getInt64(Edge),
+ Builder.getInt64(Edge + 1));
SmallVector<Value *, 2> Idx;
- Idx.push_back(Constant::getNullValue(Type::getInt64Ty(*Ctx)));
+ Idx.push_back(Builder.getInt64(0));
Idx.push_back(Sel);
Value *Counter = Builder.CreateInBoundsGEP(Counters, Idx);
Value *Count = Builder.CreateLoad(Counter);
- Count = Builder.CreateAdd(Count,
- ConstantInt::get(Type::getInt64Ty(*Ctx),1));
+ Count = Builder.CreateAdd(Count, Builder.getInt64(1));
Builder.CreateStore(Count, Counter);
} else {
ComplexEdgePreds.insert(BB);
ComplexEdgePreds, ComplexEdgeSuccs);
GlobalVariable *EdgeState = getEdgeStateValue();
- Type *Int32Ty = Type::getInt32Ty(*Ctx);
for (int i = 0, e = ComplexEdgePreds.size(); i != e; ++i) {
IRBuilder<> Builder(ComplexEdgePreds[i+1]->getTerminator());
- Builder.CreateStore(ConstantInt::get(Int32Ty, i), EdgeState);
+ Builder.CreateStore(Builder.getInt32(i), EdgeState);
}
for (int i = 0, e = ComplexEdgeSuccs.size(); i != e; ++i) {
// call runtime to perform increment
}
insertCounterWriteout(CountersBySP);
+ insertFlush(CountersBySP);
}
if (InsertIndCounterIncrCode)
// 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, Succs.size() * Preds.size());
+ ArrayType *EdgeTableTy = ArrayType::get(Int64PtrTy, TableSize);
- Constant **EdgeTable = new Constant*[Succs.size() * Preds.size()];
+ OwningArrayPtr<Constant *> EdgeTable(new Constant*[TableSize]);
Constant *NullValue = Constant::getNullValue(Int64PtrTy);
- for (int i = 0, ie = Succs.size() * Preds.size(); i != ie; ++i)
+ for (size_t i = 0; i != TableSize; ++i)
EdgeTable[i] = NullValue;
unsigned Edge = 0;
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,
+ 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;
}
- ArrayRef<Constant*> V(&EdgeTable[0], Succs.size() * Preds.size());
+ ArrayRef<Constant*> V(&EdgeTable[0], TableSize);
GlobalVariable *EdgeTableGV =
new GlobalVariable(
*M, EdgeTableTy, true, GlobalValue::InternalLinkage,
}
void GCOVProfiler::insertCounterWriteout(
- SmallVector<std::pair<GlobalVariable *, MDNode *>, 8> &CountersBySP) {
- FunctionType *WriteoutFTy =
- FunctionType::get(Type::getVoidTy(*Ctx), false);
- Function *WriteoutF = Function::Create(WriteoutFTy,
- GlobalValue::InternalLinkage,
- "__llvm_gcov_writeout", M);
+ ArrayRef<std::pair<GlobalVariable *, MDNode *> > CountersBySP) {
+ FunctionType *WriteoutFTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ Function *WriteoutF = M->getFunction("__llvm_gcov_writeout");
+ if (!WriteoutF)
+ WriteoutF = Function::Create(WriteoutFTy, GlobalValue::InternalLinkage,
+ "__llvm_gcov_writeout", M);
WriteoutF->setUnnamedAddr(true);
- BasicBlock *BB = BasicBlock::Create(*Ctx, "", WriteoutF);
+ WriteoutF->addFnAttr(Attribute::NoInline);
+ if (NoRedZone)
+ WriteoutF->addFnAttr(Attribute::NoRedZone);
+
+ BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", WriteoutF);
IRBuilder<> Builder(BB);
Constant *StartFile = getStartFileFunc();
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (CU_Nodes) {
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
- DICompileUnit compile_unit(CU_Nodes->getOperand(i));
- std::string FilenameGcda = mangleName(compile_unit, "gcda");
+ DICompileUnit CU(CU_Nodes->getOperand(i));
+ std::string FilenameGcda = mangleName(CU, "gcda");
Builder.CreateCall(StartFile,
Builder.CreateGlobalStringPtr(FilenameGcda));
- for (SmallVector<std::pair<GlobalVariable *, MDNode *>, 8>::iterator
+ for (ArrayRef<std::pair<GlobalVariable *, MDNode *> >::iterator
I = CountersBySP.begin(), E = CountersBySP.end();
I != E; ++I) {
DISubprogram SP(I->second);
intptr_t ident = reinterpret_cast<intptr_t>(I->second);
Builder.CreateCall2(EmitFunction,
- ConstantInt::get(Type::getInt32Ty(*Ctx), ident),
+ Builder.getInt32(ident),
Builder.CreateGlobalStringPtr(SP.getName()));
GlobalVariable *GV = I->first;
unsigned Arcs =
cast<ArrayType>(GV->getType()->getElementType())->getNumElements();
Builder.CreateCall2(EmitArcs,
- ConstantInt::get(Type::getInt32Ty(*Ctx), Arcs),
+ Builder.getInt32(Arcs),
Builder.CreateConstGEP2_64(GV, 0, 0));
}
Builder.CreateCall(EndFile);
F->setUnnamedAddr(true);
F->setLinkage(GlobalValue::InternalLinkage);
F->addFnAttr(Attribute::NoInline);
+ if (NoRedZone)
+ F->addFnAttr(Attribute::NoRedZone);
BB = BasicBlock::Create(*Ctx, "entry", F);
Builder.SetInsertPoint(BB);
- FTy = FunctionType::get(Type::getInt32Ty(*Ctx),
+ FTy = FunctionType::get(Builder.getInt32Ty(),
PointerType::get(FTy, 0), false);
Constant *AtExitFn = M->getOrInsertFunction("atexit", FTy);
Builder.CreateCall(AtExitFn, WriteoutF);
Fn->setUnnamedAddr(true);
Fn->setLinkage(GlobalValue::InternalLinkage);
Fn->addFnAttr(Attribute::NoInline);
-
- Type *Int32Ty = Type::getInt32Ty(*Ctx);
- Type *Int64Ty = Type::getInt64Ty(*Ctx);
- Constant *NegOne = ConstantInt::get(Int32Ty, 0xffffffff);
+ if (NoRedZone)
+ Fn->addFnAttr(Attribute::NoRedZone);
// Create basic blocks for function.
BasicBlock *BB = BasicBlock::Create(*Ctx, "entry", Fn);
Argument *Arg = Fn->arg_begin();
Arg->setName("predecessor");
Value *Pred = Builder.CreateLoad(Arg, "pred");
- Value *Cond = Builder.CreateICmpEQ(Pred, NegOne);
+ 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, Int64Ty);
+ Value *ZExtPred = Builder.CreateZExt(Pred, Builder.getInt64Ty());
Arg = llvm::next(Fn->arg_begin());
Arg->setName("counters");
Value *GEP = Builder.CreateGEP(Arg, ZExtPred);
Value *Counter = Builder.CreateLoad(GEP, "counter");
- Cond = Builder.CreateICmpEQ(Counter,
- Constant::getNullValue(Int64Ty->getPointerTo()));
+ Cond = Builder.CreateICmpEQ(Counter, Builder.getInt64(0));
Builder.CreateCondBr(Cond, Exit, CounterEnd);
// ++*counter;
Builder.SetInsertPoint(CounterEnd);
Value *Add = Builder.CreateAdd(Builder.CreateLoad(Counter),
- ConstantInt::get(Int64Ty, 1));
+ Builder.getInt64(1));
Builder.CreateStore(Add, Counter);
Builder.CreateBr(Exit);
Builder.SetInsertPoint(Exit);
Builder.CreateRetVoid();
}
+
+void GCOVProfiler::
+insertFlush(ArrayRef<std::pair<GlobalVariable*, MDNode*> > CountersBySP) {
+ FunctionType *FTy = FunctionType::get(Type::getVoidTy(*Ctx), false);
+ Function *FlushF = M->getFunction("__gcov_flush");
+ if (!FlushF)
+ FlushF = Function::Create(FTy, GlobalValue::InternalLinkage,
+ "__gcov_flush", M);
+ else
+ FlushF->setLinkage(GlobalValue::InternalLinkage);
+ FlushF->setUnnamedAddr(true);
+ FlushF->addFnAttr(Attribute::NoInline);
+ if (NoRedZone)
+ FlushF->addFnAttr(Attribute::NoRedZone);
+
+ BasicBlock *Entry = BasicBlock::Create(*Ctx, "entry", FlushF);
+
+ // Write out the current counters.
+ Constant *WriteoutF = M->getFunction("__llvm_gcov_writeout");
+ assert(WriteoutF && "Need to create the writeout function first!");
+
+ IRBuilder<> Builder(Entry);
+ Builder.CreateCall(WriteoutF);
+
+ // Zero out the counters.
+ for (ArrayRef<std::pair<GlobalVariable *, MDNode *> >::iterator
+ I = CountersBySP.begin(), E = CountersBySP.end();
+ I != E; ++I) {
+ GlobalVariable *GV = I->first;
+ Constant *Null = Constant::getNullValue(GV->getType()->getElementType());
+ Builder.CreateStore(Null, GV);
+ }
+
+ Type *RetTy = FlushF->getReturnType();
+ if (RetTy == Type::getVoidTy(*Ctx))
+ Builder.CreateRetVoid();
+ else if (RetTy->isIntegerTy())
+ // Used if __gcov_flush was implicitly declared.
+ Builder.CreateRet(ConstantInt::get(RetTy, 0));
+ else
+ report_fatal_error("invalid return type for __gcov_flush");
+}
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