bool IndependentBlocks::runOnFunction(llvm::Function &F) {
bool Changed = false;
RI = &getAnalysis<RegionInfoPass>().getRegionInfo();
LI = &getAnalysis<LoopInfoWrapperPass>().getLoopInfo();
SD = &getAnalysis<ScopDetection>();
SE = &getAnalysis<ScalarEvolution>();
AllocaBlock = &F.getEntryBlock();
DEBUG(dbgs() << "Run IndepBlock on " << F.getName() << '\n');
for (const Region *R : *SD) {
Changed |= createIndependentBlocks(R);
Changed |= eliminateDeadCode(R);
// This may change the RegionTree.
if (!DisableIntraScopScalarToArray || !PollyModelPHINodes)
Changed |= splitExitBlock(const_cast<Region *>(R));
}
DEBUG(dbgs() << "Before Scalar to Array------->\n");
DEBUG(F.dump());
if (!DisableIntraScopScalarToArray || !PollyModelPHINodes)
for (const Region *R : *SD)
Changed |= translateScalarToArray(R);
DEBUG(dbgs() << "After Independent Blocks------------->\n");
DEBUG(F.dump());
verifyAnalysis();
return Changed;
}
void md::incrementFunctionVersion(llvm::Function &fn)
{
unsigned newVersion = getFunctionVersion(fn) + 1;
auto& ctx = fn.getContext();
ConstantInt* cNewVersion = ConstantInt::get(Type::getInt32Ty(ctx), newVersion);
MDNode* versionNode = MDNode::get(ctx, ConstantAsMetadata::get(cNewVersion));
fn.setMetadata("fcd.funver", versionNode);
}
bool DINOGlobal::shouldIgnoreFunction (const llvm::Function &F) {
if (F.getName().find(DINOPrefix) == 0) {
#ifdef DINO_VERBOSE
llvm::outs() << "Skipping DINO function " << F.getName() << "\n";
#endif //DINO_VERBOSE
return true;
}
return false;
}
//------------------------------------------------------------------
/// Scan a function to see if any instructions are interesting
///
/// @param[in] f
/// The function to be inspected.
///
/// @return
/// False if there was an error scanning; true otherwise.
//------------------------------------------------------------------
virtual bool InspectFunction(llvm::Function &f)
{
for (llvm::Function::iterator bbi = f.begin(), last_bbi = f.end();
bbi != last_bbi;
++bbi)
{
if (!InspectBasicBlock(*bbi))
return false;
}
return true;
}
void AstBackEnd::runOnFunction(llvm::Function& fn)
{
grapher.reset(new AstGrapher);
// Before doing anything, create statements for blocks in reverse post-order. This ensures that values exist
// before they are used. (Post-order would try to use statements before they were created.)
for (BasicBlock* block : ReversePostOrderTraversal<BasicBlock*>(&fn.getEntryBlock()))
{
grapher->createRegion(*block, *output->basicBlockToStatement(*block));
}
// Identify loops, then visit basic blocks in post-order. If the basic block if the head
// of a cyclic region, process the loop. Otherwise, if the basic block is the start of a single-entry-single-exit
// region, process that region.
auto& domTreeWrapper = getAnalysis<DominatorTreeWrapperPass>(fn);
domTree = &domTreeWrapper.getDomTree();
postDomTree->recalculate(fn);
RootedPostDominatorTree::treeFromIncompleteTree(fn, postDomTree);
// Traverse graph in post-order. Try to detect regions with the post-dominator tree.
// Cycles are only considered once.
for (BasicBlock* entry : post_order(&fn.getEntryBlock()))
{
BasicBlock* postDominator = entry;
while (postDominator != nullptr)
{
AstGraphNode* graphNode = grapher->getGraphNodeFromEntry(postDominator);
BasicBlock* exit = graphNode->hasExit()
? graphNode->getExit()
: postDominatorOf(*postDomTree, *postDominator);
RegionType region = isRegion(*entry, exit);
if (region == Acyclic)
{
runOnRegion(fn, *entry, exit);
}
else if (region == Cyclic)
{
runOnLoop(fn, *entry, exit);
}
if (!domTree->dominates(entry, exit))
{
break;
}
postDominator = exit;
}
}
Statement* bodyStatement = grapher->getGraphNodeFromEntry(&fn.getEntryBlock())->node;
output->setBody(bodyStatement);
}
bool BitcastCallEliminator::runOnFunction(llvm::Function &function)
{
bool res = false;
bool doLoop = true;
while (doLoop) {
doLoop = false;
for (llvm::Function::iterator i = function.begin(), e = function.end(); i != e; ++i) {
llvm::BasicBlock *bb = &*i;
bool bbchanged = false;
for (llvm::BasicBlock::iterator ibb = bb->begin(), ebb = bb->end(); ibb != ebb; ++ibb) {
llvm::Instruction *inst = &*ibb;
if (llvm::isa<llvm::CallInst>(inst) && llvm::cast<llvm::CallInst>(inst)->getCalledFunction() == NULL) {
llvm::CallInst *callInst = llvm::cast<llvm::CallInst>(inst);
llvm::Value *calledValue = callInst->getCalledValue();
llvm::Value *bareCalledValue = calledValue->stripPointerCasts();
if (llvm::isa<llvm::Function>(bareCalledValue)) {
const llvm::FunctionType *calledType = llvm::cast<llvm::FunctionType>(llvm::cast<llvm::PointerType>(calledValue->getType())->getContainedType(0));
const llvm::FunctionType *calleeType = llvm::cast<llvm::Function>(bareCalledValue)->getFunctionType();
if (calledType->getReturnType() == calleeType->getReturnType()) {
if (argsMatch(calleeType, callInst)) {
std::vector<llvm::Value*> args;
unsigned int numArgs = callInst->getNumArgOperands();
for (unsigned int k = 0; k < numArgs; ++k) {
args.push_back(callInst->getArgOperand(k));
}
#if LLVM_VERSION < VERSION(3, 0)
llvm::CallInst *newCall = llvm::CallInst::Create(bareCalledValue, args.begin(), args.end(), "", inst);
#else
llvm::CallInst *newCall = llvm::CallInst::Create(bareCalledValue, args, "", inst);
#endif
inst->replaceAllUsesWith(newCall);
llvm::StringRef name = inst->getName();
inst->eraseFromParent();
newCall->setName(name);
res = true;
doLoop = true;
bbchanged = true;
}
}
}
}
if (bbchanged) {
break;
}
}
}
}
return res;
}
bool InstructionCount::runOnFunction(llvm::Function &Fun) {
ICount = 0;
// A llvm::Function is just a list of llvm::BasicBlock. In order to get
// instruction count we can visit all llvm::BasicBlocks ...
for(llvm::Function::const_iterator I = Fun.begin(),
E = Fun.end();
I != E;
++I)
// ... and sum the llvm::BasicBlock size -- A llvm::BasicBlock size is just
// a list of instructions!
ICount += I->size();
return false;
}
bool Unboxing::runOnFunction(llvm::Function & f) {
//std::cout << "running Unboxing optimization..." << std::endl;
m = reinterpret_cast<RiftModule*>(f.getParent());
ta = &getAnalysis<TypeAnalysis>();
for (auto & b : f) {
auto i = b.begin();
while (i != b.end()) {
ins = i;
bool erase = false;
if (CallInst * ci = dyn_cast<CallInst>(ins)) {
StringRef s = ci->getCalledFunction()->getName();
if (s == "genericAdd") {
erase = genericArithmetic(Instruction::FAdd);
} else if (s == "genericSub") {
erase = genericArithmetic(Instruction::FSub);
} else if (s == "genericMul") {
erase = genericArithmetic(Instruction::FMul);
} else if (s == "genericDiv") {
erase = genericArithmetic(Instruction::FDiv);
} else if (s == "genericLt") {
erase = genericRelational(FCmpInst::FCMP_OLT);
} else if (s == "genericGt") {
erase = genericRelational(FCmpInst::FCMP_OGT);
} else if (s == "genericEq") {
erase = genericRelational(FCmpInst::FCMP_OEQ);
} else if (s == "genericNeq") {
erase = genericRelational(FCmpInst::FCMP_ONE);
} else if (s == "genericGetElement") {
erase = genericGetElement();
}
}
if (erase) {
llvm::Instruction * v = i;
++i;
state().erase(v);
v->eraseFromParent();
} else {
++i;
}
}
}
if (DEBUG) {
cout << "After unboxing optimization: --------------------------------" << endl;
f.dump();
state().print(cout);
}
return false;
}
bool CLIPSFunctionPass::runOnFunction(llvm::Function& function) {
if(!function.isDeclaration()) {
void* env = getEnvironment();
CLIPSEnvironment* clEnv = new CLIPSEnvironment(env);
EnvReset(env);
CLIPSPassHeader* header = (CLIPSPassHeader*)getIndirectPassHeader();
char* passes = CharBuffer(strlen(header->getPasses()) + 64);
sprintf(passes,"(passes %s)", header->getPasses());
EnvAssertString(env, passes);
free(passes);
KnowledgeConstructor tmp;
if(header->needsLoops() && header->needsRegions()) {
llvm::LoopInfo& li = getAnalysis<LoopInfo>();
llvm::RegionInfo& ri = getAnalysis<RegionInfo>();
tmp.route(function, li, ri);
} else if(header->needsLoops() && !header->needsRegions()) {
llvm::LoopInfo& li = getAnalysis<LoopInfo>();
tmp.route(function, li);
} else if(header->needsRegions() && !header->needsLoops()) {
llvm::RegionInfo& ri = getAnalysis<RegionInfo>();
tmp.route(function, ri);
} else {
tmp.route(function);
}
clEnv->makeInstances((char*)tmp.getInstancesAsString().c_str());
//TODO: put in the line to build the actual knowledge
EnvRun(env, -1L);
//it's up to the code in the expert system to make changes
EnvReset(env);
return true;
} else {
return false;
}
}
bool ArgumentRenamePass::runOnFunction(llvm::Function &F) {
for (auto &A : F.args()) {
A.setName("arg." + A.getName());
}
return true;
}
bool BasicFunctionPass::runOnFunction(llvm::Function& function) {
RemoveRedundantCallsToSetVisibility optimize_set_visibility;
bool changed = false;
for (auto& block : function.getBasicBlockList()) {
bool block_changed = optimize_set_visibility.runOnBasicBlock(block);
changed = changed || block_changed;
}
return changed;
}
void emitValidRemarks(const llvm::Function &F, const Region *R) {
LLVMContext &Ctx = F.getContext();
DebugLoc Begin, End;
getDebugLocations(R, Begin, End);
emitOptimizationRemark(Ctx, DEBUG_TYPE, F, Begin,
"A valid Scop begins here.");
emitOptimizationRemark(Ctx, DEBUG_TYPE, F, End, "A valid Scop ends here.");
}
std::vector<llvm::BasicBlock*> BasicBlockSorter::sortBasicBlocks(llvm::Function &function)
{
std::vector<llvm::BasicBlock*> ret;
std::set<llvm::BasicBlock*> visited;
llvm::BasicBlock &entryBlock = function.getEntryBlock();
visitBasicBlock(ret, visited, &entryBlock);
return ret;
}
void createPrimitiveDestructor(Module& module, const SEM::TypeInstance* const typeInstance, llvm::Function& llvmFunction) {
assert(llvmFunction.isDeclaration());
Function functionGenerator(module, llvmFunction, destructorArgInfo(module, *typeInstance), &(module.templateBuilder(TemplatedObject::TypeInstance(typeInstance))));
const auto debugInfo = genDebugDestructorFunction(module, *typeInstance, &llvmFunction);
functionGenerator.attachDebugInfo(debugInfo);
functionGenerator.setDebugPosition(getDebugDestructorPosition(module, *typeInstance));
genPrimitiveDestructorCall(functionGenerator, typeInstance->selfType(), functionGenerator.getRawContextValue());
functionGenerator.getBuilder().CreateRetVoid();
functionGenerator.verify();
}
Function::Function(Module& pModule, llvm::Function& function, const ArgInfo& argInfo, TemplateBuilder* pTemplateBuilder)
: module_(pModule), function_(function),
entryBuilder_(pModule.getLLVMContext()),
builder_(pModule.getLLVMContext()),
createdEntryBlock_(false),
useEntryBuilder_(false),
argInfo_(argInfo),
templateBuilder_(pTemplateBuilder),
#if LOCIC_LLVM_VERSION < 307
debugInfo_(nullptr),
#endif
exceptionInfo_(nullptr),
returnValuePtr_(nullptr),
templateArgs_(nullptr),
unwindState_(nullptr) {
assert(function.isDeclaration());
assert(argInfo_.numArguments() == function_.getFunctionType()->getNumParams());
// Add a bottom level unwind stack.
unwindStackStack_.push(UnwindStack());
// Add bottom level action for this function.
unwindStack().push_back(UnwindAction::FunctionMarker());
const auto startBB = createBasicBlock("");
builder_.SetInsertPoint(startBB);
argValues_.reserve(function_.arg_size());
for (auto arg = function_.arg_begin(); arg != function_.arg_end(); ++arg) {
argValues_.push_back(arg);
}
std::vector<llvm_abi::Type*> argABITypes;
argABITypes.reserve(argInfo.argumentTypes().size());
std::vector<llvm::Type*> argLLVMTypes;
argLLVMTypes.reserve(argInfo.argumentTypes().size());
for (const auto& typePair : argInfo.argumentTypes()) {
argABITypes.push_back(typePair.first);
argLLVMTypes.push_back(typePair.second);
}
SetUseEntryBuilder useEntryBuilder(*this);
// Decode arguments according to ABI.
decodeABIValues(argValues_, argABITypes, argLLVMTypes);
}
bool FunctionEraser::runOnFunction(llvm::Function &Fun) {
// Get the analysis we need. Please notice that we are not giving any argument
// to 'getAnalysis'. This is the correct way for requesting analysis from
// 'llvm::FunctionPass'. If you need to get analysis information from a
// 'llvm::ModulePass', then you have to give the Function you want to analyze
// as 'getAnalysis' argument.
InstructionCount &ICount = getAnalysis<InstructionCount>();
if(ICount.GetInstructionCount() < EraseThreshold)
return false;
// Apply the transformation by erasing function body.
Fun.deleteBody();
// Update pass statistics.
++ErasedFunctions;
return true;
}
bool MemoryAnalyzer::runOnFunction(llvm::Function &function)
{
m_globals.clear();
m_map.clear();
m_mayZap.clear();
llvm::Module *module = function.getParent();
for (llvm::Module::global_iterator global = module->global_begin(), globale = module->global_end(); global != globale; ++global) {
const llvm::Type *globalType = llvm::cast<llvm::PointerType>(global->getType())->getContainedType(0);
if (llvm::isa<llvm::IntegerType>(globalType)) {
m_globals.insert(&*global);
}
}
#if LLVM_VERSION < VERSION(3, 8)
m_aa = &getAnalysis<llvm::AliasAnalysis>();
#else
m_aa = &getAnalysis<llvm::AAResultsWrapperPass>().getAAResults();
#endif
visit(function);
return false;
}
void emitRejectionRemarks(const llvm::Function &F, const RejectLog &Log) {
LLVMContext &Ctx = F.getContext();
const Region *R = Log.region();
DebugLoc Begin, End;
getDebugLocations(R, Begin, End);
emitOptimizationRemarkMissed(
Ctx, DEBUG_TYPE, F, Begin,
"The following errors keep this region from being a Scop.");
for (RejectReasonPtr RR : Log) {
if (const DebugLoc &Loc = RR->getDebugLoc())
emitOptimizationRemarkMissed(Ctx, DEBUG_TYPE, F, Loc,
RR->getEndUserMessage());
}
emitOptimizationRemarkMissed(Ctx, DEBUG_TYPE, F, End,
"Invalid Scop candidate ends here.");
}
void JITEngine::optimizeFunction(llvm::Function &f) {
f.viewCFG();
m_llvmFuncPassManager->run(f);
f.viewCFG();
}
bool CallingConvention_AnyArch_AnyCC::analyzeFunction(ParameterRegistry ®istry, CallInformation &fillOut, llvm::Function &func)
{
if (!isFullDisassembly() || md::isPrototype(func))
{
return false;
}
auto regs = &*func.arg_begin();
unordered_map<const TargetRegisterInfo*, ModRefInfo> resultMap;
// Find all GEPs
const auto& target = registry.getTargetInfo();
unordered_multimap<const TargetRegisterInfo*, User*> registerUsers;
for (User* user : regs->users())
{
if (const TargetRegisterInfo* maybeRegister = target.registerInfo(*user))
{
const TargetRegisterInfo& registerInfo = target.largestOverlappingRegister(*maybeRegister);
registerUsers.insert({®isterInfo, user});
}
}
// Find all users of these GEPs
DominatorsPerRegister gepUsers;
for (auto iter = registerUsers.begin(); iter != registerUsers.end(); iter++)
{
addAllUsers(*iter->second, iter->first, gepUsers);
}
DominatorTree& preDom = registry.getAnalysis<DominatorTreeWrapperPass>(func).getDomTree();
PostDominatorTree& postDom = registry.getAnalysis<PostDominatorTreeWrapperPass>(func).getPostDomTree();
// Add calls
SmallVector<CallInst*, 8> calls;
CallGraph& cg = registry.getAnalysis<CallGraphWrapperPass>().getCallGraph();
CallGraphNode* thisFunc = cg[&func];
for (const auto& pair : *thisFunc)
{
Function* callee = pair.second->getFunction();
if (const CallInformation* callInfo = registry.getCallInfo(*callee))
if (callInfo->getStage() == CallInformation::Completed)
{
// pair.first is a weak value handle and has a cast operator to get the pointee
CallInst* caller = cast<CallInst>((Value*)pair.first);
calls.push_back(caller);
for (const auto& vi : *callInfo)
{
if (vi.type == ValueInformation::IntegerRegister)
{
gepUsers[vi.registerInfo].insert(caller);
}
}
}
}
// Start out resultMap based on call dominance. Weed out calls until dominant call set has been established.
// This map will be refined by results from mod/ref instruction analysis. The purpose is mainly to define
// mod/ref behavior for registers that are used in callees of this function, but not in this function
// directly.
while (calls.size() > 0)
{
unordered_map<const TargetRegisterInfo*, unsigned> callResult;
auto dominant = findDominantValues(preDom, calls);
for (CallInst* call : dominant)
{
Function* callee = call->getCalledFunction();
for (const auto& pair : translateToModRef(*registry.getCallInfo(*callee)))
{
callResult[pair.first] |= pair.second;
}
calls.erase(find(calls.begin(), calls.end(), call));
}
for (const auto& pair : callResult)
{
resultMap[pair.first] = static_cast<ModRefInfo>(pair.second);
}
}
// Find the dominant use(s)
auto preDominatingUses = gepUsers;
for (auto& pair : preDominatingUses)
{
pair.second = findDominantValues(preDom, pair.second);
}
// Fill out ModRef use dictionary
// (Ref info is incomplete)
for (auto& pair : preDominatingUses)
{
ModRefInfo& r = resultMap[pair.first];
r = IncompleteRef;
for (auto inst : pair.second)
{
if (isa<StoreInst>(inst))
{
// If we see a dominant store, then the register is modified.
r = MRI_Mod;
break;
}
if (CallInst* call = dyn_cast<CallInst>(inst))
{
// If the first user is a call, propagate its ModRef value.
r = registry.getCallInfo(*call->getCalledFunction())->getRegisterModRef(*pair.first);
break;
}
}
}
// Find post-dominating stores
auto postDominatingUses = gepUsers;
for (auto& pair : postDominatingUses)
{
const TargetRegisterInfo* key = pair.first;
auto& set = pair.second;
// remove non-Mod instructions
for (auto iter = set.begin(); iter != set.end(); )
{
if (isa<StoreInst>(*iter))
{
iter++;
continue;
}
else if (CallInst* call = dyn_cast<CallInst>(*iter))
{
auto callee = call->getCalledFunction();
const auto& info = *registry.getCallInfo(*callee);
if ((info.getRegisterModRef(*key) & MRI_Mod) == MRI_Mod)
{
iter++;
continue;
}
}
iter = set.erase(iter);
}
set = findDominantValues(postDom, set);
}
MemorySSA& mssa = *registry.getMemorySSA(func);
// Walk up post-dominating uses until we get to liveOnEntry.
for (auto& pair : postDominatingUses)
{
walkUpPostDominatingUse(target, mssa, preDominatingUses, postDominatingUses, resultMap, pair.first);
}
// Use resultMap to build call information. First, sort registers by their pointer order; this ensures stable
// parameter order.
// We have authoritative information on used parameters, but not on return values. Only register parameters in this
// step.
SmallVector<pair<const TargetRegisterInfo*, ModRefInfo>, 16> registers;
copy(resultMap.begin(), resultMap.end(), registers.begin());
sort(registers.begin(), registers.end());
vector<const TargetRegisterInfo*> returns;
for (const auto& pair : resultMap)
{
if (pair.second & MRI_Ref)
{
fillOut.addParameter(ValueInformation::IntegerRegister, pair.first);
}
if (pair.second & MRI_Mod)
{
returns.push_back(pair.first);
}
}
// Check for used returns.
for (const TargetRegisterInfo* reg : ipaFindUsedReturns(registry, func, returns))
{
fillOut.addReturn(ValueInformation::IntegerRegister, reg);
}
return true;
}
bool _runOnFunction(llvm::Function& f) {
Timer _t2("(sum)");
Timer _t("initializing");
initialize();
_t.split("overhead");
// f.dump();
llvm::Module* cur_module = f.getParent();
#if LLVMREV < 217548
llvm::PassManager fake_pm;
#else
llvm::legacy::PassManager fake_pm;
#endif
llvm::InlineCostAnalysis* cost_analysis = new llvm::InlineCostAnalysis();
fake_pm.add(cost_analysis);
// llvm::errs() << "doing fake run\n";
fake_pm.run(*fake_module);
// llvm::errs() << "done with fake run\n";
bool did_any_inlining = false;
// TODO I haven't gotten the callgraph-updating part of the inliner to work,
// so it's not easy to tell what callsites have been inlined into (ie added to)
// the function.
// One simple-but-not-great way to handle it is to just iterate over the entire function
// multiple times and re-inline things until we don't want to inline any more;
// NPASSES controls the maximum number of times to attempt that.
// Right now we actually don't need that, since we only inline fully-optimized
// functions (from the stdlib), and those will already have had inlining
// applied recursively.
const int NPASSES = 1;
for (int passnum = 0; passnum < NPASSES; passnum++) {
_t.split("collecting calls");
std::vector<llvm::CallSite> calls;
for (llvm::inst_iterator I = llvm::inst_begin(f), E = llvm::inst_end(f); I != E; ++I) {
llvm::CallInst* call = llvm::dyn_cast<llvm::CallInst>(&(*I));
// From Inliner.cpp:
if (!call || llvm::isa<llvm::IntrinsicInst>(call))
continue;
// I->dump();
llvm::CallSite CS(call);
llvm::Value* v = CS.getCalledValue();
llvm::ConstantExpr* ce = llvm::dyn_cast<llvm::ConstantExpr>(v);
if (!ce)
continue;
assert(ce->isCast());
llvm::ConstantInt* l_addr = llvm::cast<llvm::ConstantInt>(ce->getOperand(0));
int64_t addr = l_addr->getSExtValue();
if (addr == (int64_t)printf)
continue;
llvm::Function* f = g.func_addr_registry.getLLVMFuncAtAddress((void*)addr);
if (f == NULL) {
if (VERBOSITY()) {
printf("Giving up on inlining %s:\n",
g.func_addr_registry.getFuncNameAtAddress((void*)addr, true).c_str());
call->dump();
}
continue;
}
// We load the bitcode lazily, so check if we haven't yet fully loaded the function:
if (f->isMaterializable()) {
#if LLVMREV < 220600
f->Materialize();
#else
f->materialize();
#endif
}
// It could still be a declaration, though I think the code won't generate this case any more:
if (f->isDeclaration())
continue;
// Keep this section as a release_assert since the code-to-be-inlined, as well as the inlining
// decisions, can be different in release mode:
int op_idx = -1;
for (llvm::Argument& arg : f->args()) {
++op_idx;
llvm::Type* op_type = call->getOperand(op_idx)->getType();
if (arg.getType() != op_type) {
llvm::errs() << f->getName() << " has arg " << op_idx << " mismatched!\n";
llvm::errs() << "Given ";
op_type->dump();
llvm::errs() << " but underlying function expected ";
arg.getType()->dump();
llvm::errs() << '\n';
}
RELEASE_ASSERT(arg.getType() == call->getOperand(op_idx)->getType(), "");
}
assert(!f->isDeclaration());
CS.setCalledFunction(f);
calls.push_back(CS);
}
// assert(0 && "TODO");
// printf("%ld\n", calls.size());
bool did_inline = false;
_t.split("doing inlining");
while (calls.size()) {
llvm::CallSite cs = calls.back();
calls.pop_back();
// if (VERBOSITY("irgen.inlining") >= 1) {
// llvm::errs() << "Evaluating callsite ";
// cs->dump();
//}
llvm::InlineCost IC = cost_analysis->getInlineCost(cs, threshold);
bool do_inline = false;
if (IC.isAlways()) {
if (VERBOSITY("irgen.inlining") >= 2)
llvm::errs() << "always inline\n";
do_inline = true;
} else if (IC.isNever()) {
if (VERBOSITY("irgen.inlining") >= 2)
llvm::errs() << "never inline\n";
do_inline = false;
} else {
if (VERBOSITY("irgen.inlining") >= 2)
llvm::errs() << "Inline cost: " << IC.getCost() << '\n';
do_inline = (bool)IC;
}
if (VERBOSITY("irgen.inlining") >= 1) {
if (!do_inline)
llvm::outs() << "not ";
llvm::outs() << "inlining ";
cs->dump();
}
if (do_inline) {
static StatCounter num_inlines("num_inlines");
num_inlines.log();
// llvm::CallGraph cg(*f.getParent());
////cg.addToCallGraph(cs->getCalledFunction());
// llvm::InlineFunctionInfo InlineInfo(&cg);
llvm::InlineFunctionInfo InlineInfo;
bool inlined = llvm::InlineFunction(cs, InlineInfo, false);
did_inline = did_inline || inlined;
did_any_inlining = did_any_inlining || inlined;
// if (inlined)
// f.dump();
}
}
if (!did_inline) {
if (passnum >= NPASSES - 1 && VERBOSITY("irgen.inlining"))
printf("quitting after %d passes\n", passnum + 1);
break;
}
}
// TODO would be nice to break out here and not have to rematerialize the function;
// I think I have to do that even if no inlining happened from the "setCalledFunction" call above.
// I thought that'd just change the CS object, but maybe it changes the underlying instruction as well?
// if (!did_any_inlining)
// return false;
_t.split("remapping");
llvm::ValueToValueMapTy VMap;
for (llvm::Function::iterator I = f.begin(), E = f.end(); I != E; ++I) {
VMap[I] = I;
}
MyMaterializer materializer(cur_module);
for (llvm::inst_iterator I = llvm::inst_begin(f), E = llvm::inst_end(f); I != E; ++I) {
RemapInstruction(&(*I), VMap, llvm::RF_None, NULL, &materializer);
}
_t.split("cleaning up");
std::vector<llvm::GlobalValue*> to_remove;
for (llvm::Module::global_iterator I = cur_module->global_begin(), E = cur_module->global_end(); I != E; ++I) {
if (I->use_empty()) {
to_remove.push_back(I);
continue;
}
}
for (int i = 0; i < to_remove.size(); i++) {
to_remove[i]->eraseFromParent();
}
for (llvm::Module::iterator I = cur_module->begin(), E = cur_module->end(); I != E;) {
if (!I->isDeclaration()) {
++I;
continue;
}
if (I->use_empty()) {
I = cur_module->getFunctionList().erase(I);
} else {
++I;
}
}
return did_any_inlining;
}
bool NullDerefProtectionTransformer::runOnFunction(llvm::Function &F) {
llvm::IRBuilder<> TheBuilder(F.getContext());
Builder = &TheBuilder;
std::vector<llvm::Instruction*> WorkList;
for (llvm::inst_iterator i = inst_begin(F), e = inst_end(F); i != e; ++i) {
llvm::Instruction* I = &*i;
if (llvm::isa<llvm::LoadInst>(I))
WorkList.push_back(I);
}
for (std::vector<llvm::Instruction*>::iterator i = WorkList.begin(),
e = WorkList.end(); i != e; ++i) {
Inst = *i;
llvm::LoadInst* I = llvm::cast<llvm::LoadInst>(*i);
// Find all the instructions that uses the instruction I.
for (llvm::Value::use_iterator UI = I->use_begin(), UE = I->use_end();
UI != UE; ++UI) {
// Check whether I is used as the first argument for a load instruction.
// If it is, then instrument the load instruction.
if (llvm::LoadInst* LI = llvm::dyn_cast<llvm::LoadInst>(*UI)) {
llvm::Value* Arg = LI->getOperand(0);
if (Arg == I)
instrumentInst(LI, Arg);
}
// Check whether I is used as the second argument for a store
// instruction. If it is, then instrument the store instruction.
else if (llvm::StoreInst* SI = llvm::dyn_cast<llvm::StoreInst>(*UI)) {
llvm::Value* Arg = SI->getOperand(1);
if (Arg == I)
instrumentInst(SI, Arg);
}
// Check whether I is used as the first argument for a GEP instruction.
// If it is, then instrument the GEP instruction.
else if (llvm::GetElementPtrInst* GEP = llvm::dyn_cast<
llvm::GetElementPtrInst>(*UI)) {
llvm::Value* Arg = GEP->getOperand(0);
if (Arg == I)
instrumentInst(GEP, Arg);
}
else {
// Check whether I is used as the first argument for a call instruction.
// If it is, then instrument the call instruction.
llvm::CallSite CS(*UI);
if (CS) {
llvm::CallSite::arg_iterator i = CS.arg_begin(), e = CS.arg_end();
if (i != e) {
llvm::Value *Arg = *i;
if (Arg == I)
instrumentInst(CS.getInstruction(), Arg);
}
}
}
}
}
return true;
}
bool TypeAnalysis::runOnFunction(llvm::Function & f) {
state.clear();
if (DEBUG) std::cout << "runnning TypeAnalysis..." << std::endl;
// for all basic blocks, for all instructions
do {
// cout << ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>" << endl;
state.iterationStart();
for (auto & b : f) {
for (auto & i : b) {
if (CallInst * ci = dyn_cast<CallInst>(&i)) {
StringRef s = ci->getCalledFunction()->getName();
if (s == "doubleVectorLiteral") {
// when creating literal from a double, it is
// always double scalar
llvm::Value * op = ci->getOperand(0);
AType * t = new AType(AType::Kind::D);
state.update(op, t);
state.update(ci, new AType(AType::Kind::DV, t));
} else if (s == "characterVectorLiteral") {
state.update(ci, new AType(AType::Kind::CV));
} else if (s == "fromDoubleVector") {
state.update(ci,
new AType(AType::Kind::R,
state.get(ci->getOperand(0))));
} else if (s == "fromCharacterVector") {
state.update(ci,
new AType(AType::Kind::R,
state.get(ci->getOperand(0))));
} else if (s == "fromFunction") {
state.update(ci,
new AType(AType::Kind::R,
state.get(ci->getOperand(0))));
} else if (s == "genericGetElement") {
genericGetElement(ci);
} else if (s == "genericSetElement") {
// don't do anything for set element as it does not
// produce any new value
} else if (s == "genericAdd") {
genericArithmetic(ci);
} else if (s == "genericSub") {
genericArithmetic(ci);
} else if (s == "genericMul") {
genericArithmetic(ci);
} else if (s == "genericDiv") {
genericArithmetic(ci);
} else if (s == "genericEq") {
genericRelational(ci);
} else if (s == "genericNeq") {
genericRelational(ci);
} else if (s == "genericLt") {
genericRelational(ci);
} else if (s == "genericGt") {
genericRelational(ci);
} else if (s == "length") {
// result of length operation is always
// double scalar
state.update(ci, new AType(AType::Kind::D));
} else if (s == "type") {
// result of type operation is always
// character vector
state.update(ci, new AType(AType::Kind::CV));
} else if (s == "c") {
// make sure the types to c are correct
AType * t1 = state.get(ci->getArgOperand(1));
for (unsigned i = 2; i < ci->getNumArgOperands(); ++i)
t1 = t1->merge(state.get(ci->getArgOperand(i)));
if (t1->isScalar())
// concatenation of scalars is a vector
t1 = new AType(AType::Kind::R, AType::Kind::DV);
state.update(ci, t1);
} else if (s == "genericEval") {
state.update(ci, new AType(AType::Kind::R));
} else if (s == "envGet") {
state.update(ci, new AType(AType::Kind::R));
}
} else if (PHINode * phi = dyn_cast<PHINode>(&i)) {
AType * first = state.get(phi->getOperand(0));
AType * second = state.get(phi->getOperand(1));
AType * result = first->merge(second);
state.update(phi, result);
}
}
}
} while (!state.hasReachedFixpoint());
if (DEBUG) {
f.dump();
cout << state << endl;
}
return false;
}
// Propagate conditions
bool ConditionPropagator::runOnFunction(llvm::Function &F)
{
m_map.clear();
llvm::SmallVector<std::pair<const llvm::BasicBlock*, const llvm::BasicBlock*>, 32> backedgesVector;
llvm::FindFunctionBackedges(F, backedgesVector);
std::set<std::pair<const llvm::BasicBlock*, const llvm::BasicBlock*> > backedges;
backedges.insert(backedgesVector.begin(), backedgesVector.end());
if (m_debug) {
std::cout << "========================================" << std::endl;
}
for (llvm::Function::iterator bbi = F.begin(), bbe = F.end(); bbi != bbe; ++bbi) {
llvm::BasicBlock *bb = &*bbi;
std::set<llvm::BasicBlock*> preds;
for (llvm::Function::iterator tmpi = F.begin(), tmpe = F.end(); tmpi != tmpe; ++tmpi) {
if (isPred(&*tmpi, bb) && backedges.find(std::make_pair(&*tmpi, bb)) == backedges.end()) {
if (m_debug) {
std::cout << bb->getName().str() << " has non-backedge predecessor " << tmpi->getName().str() << std::endl;
}
preds.insert(&*tmpi);
}
}
std::set<llvm::Value*> trueSet;
std::set<llvm::Value*> falseSet;
bool haveStarted = false;
for (std::set<llvm::BasicBlock*>::iterator i = preds.begin(), e = preds.end(); i != e; ++i) {
TrueFalseMap::iterator it = m_map.find(*i);
if (it == m_map.end()) {
std::cerr << "Did not find condition information for predecessor " << (*i)->getName().str() << "!" << std::endl;
exit(99999);
}
if (!haveStarted) {
trueSet = it->second.first;
falseSet = it->second.second;
haveStarted = true;
} else {
// intersect
trueSet = intersect(trueSet, it->second.first);
falseSet = intersect(falseSet, it->second.second);
}
}
if (preds.size() == 1) {
llvm::BasicBlock *pred = *(preds.begin());
// branch condition!
if (!m_onlyLoopConditions || m_lcbs.find(pred) != m_lcbs.end()) {
llvm::TerminatorInst *termi = pred->getTerminator();
if (llvm::isa<llvm::BranchInst>(termi)) {
llvm::BranchInst *br = llvm::cast<llvm::BranchInst>(termi);
if (br->isConditional()) {
if (br->getSuccessor(0) == bb) {
// branch on true
trueSet.insert(br->getCondition());
} else {
// branch on false
falseSet.insert(br->getCondition());
}
}
}
}
// assumes!
if (!m_onlyLoopConditions) {
for (llvm::BasicBlock::iterator insti = pred->begin(), inste = pred->end(); insti != inste; ++insti) {
if (llvm::isa<llvm::CallInst>(insti)) {
llvm::CallInst *ci = llvm::cast<llvm::CallInst>(insti);
llvm::Function *calledFunction = ci->getCalledFunction();
if (calledFunction != NULL) {
std::string functionName = calledFunction->getName().str();
if (functionName == "__kittel_assume") {
llvm::CallSite callSite(ci);
trueSet.insert(callSite.getArgument(0));
}
}
}
}
}
}
if (m_debug) {
std::cout << "In " << bb->getName().str() << ":" << std::endl;
std::cout << "TRUE: "; printSet(trueSet); std::cout << std::endl;
std::cout << "FALSE: "; printSet(falseSet); std::cout << std::endl;
if (++bbi != bbe) {
std::cout << std::endl;
}
--bbi;
}
m_map.insert(std::make_pair(bb, std::make_pair(trueSet, falseSet)));
}
return false;
}
void JitEventListener::NotifyFunctionEmitted(const llvm::Function &f, void *, size_t, const llvm::JITEventListener::EmittedFunctionDetails &)
{
if(f.getName().find("__cling_Un1Qu3")!=llvm::StringRef::npos)
emit aboutToExecWrappedFunction();
}
