LLConstant *DtoConstCString(const char *str) {
llvm::StringRef s(str ? str : "");
const auto it = gIR->stringLiteral1ByteCache.find(s);
llvm::GlobalVariable *gvar =
it == gIR->stringLiteral1ByteCache.end() ? nullptr : it->getValue();
if (gvar == nullptr) {
llvm::Constant *init =
llvm::ConstantDataArray::getString(gIR->context(), s, true);
gvar = new llvm::GlobalVariable(gIR->module, init->getType(), true,
llvm::GlobalValue::PrivateLinkage, init,
".str");
#if LDC_LLVM_VER >= 309
gvar->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
#else
gvar->setUnnamedAddr(true);
#endif
gIR->stringLiteral1ByteCache[s] = gvar;
}
LLConstant *idxs[] = {DtoConstUint(0), DtoConstUint(0)};
return llvm::ConstantExpr::getGetElementPtr(gvar->getInitializer()->getType(),
gvar, idxs, true);
}
LLValue* DtoGEPi(LLValue* ptr, unsigned i0, unsigned i1, const char* var, llvm::BasicBlock* bb)
{
LLSmallVector<LLValue*,2> v(2);
v[0] = DtoConstUint(i0);
v[1] = DtoConstUint(i1);
return llvm::GetElementPtrInst::Create(ptr, v, var?var:"tmp", bb?bb:gIR->scopebb());
}
LLConstant* DtoConstString(const char* str)
{
llvm::StringRef s(str ? str : "");
llvm::GlobalVariable* gvar = (gIR->stringLiteral1ByteCache.find(s) ==
gIR->stringLiteral1ByteCache.end())
? 0 : gIR->stringLiteral1ByteCache[s];
if (gvar == 0)
{
llvm::Constant* init = llvm::ConstantDataArray::getString(gIR->context(), s, true);
gvar = new llvm::GlobalVariable(gIR->module, init->getType(), true,
llvm::GlobalValue::PrivateLinkage, init, ".str");
gvar->setUnnamedAddr(true);
gIR->stringLiteral1ByteCache[s] = gvar;
}
LLConstant* idxs[] = { DtoConstUint(0), DtoConstUint(0) };
return DtoConstSlice(
DtoConstSize_t(s.size()),
llvm::ConstantExpr::getGetElementPtr(
#if LDC_LLVM_VER >= 307
gvar->getInitializer()->getType(),
#endif
gvar, idxs, true),
Type::tchar->arrayOf()
);
}
LLConstant *DtoGEPi(LLConstant *ptr, unsigned i0, unsigned i1) {
LLPointerType *p = isaPointer(ptr);
(void)p;
assert(p && "GEP expects a pointer type");
LLValue *indices[] = {DtoConstUint(i0), DtoConstUint(i1)};
return llvm::ConstantExpr::getGetElementPtr(
p->getElementType(), ptr, indices, /* InBounds = */ true);
}
LLConstant* DtoConstStringPtr(const char* str, const char* section)
{
llvm::StringRef s(str);
LLConstant* init = llvm::ConstantDataArray::getString(gIR->context(), s, true);
llvm::GlobalVariable* gvar = new llvm::GlobalVariable(
*gIR->module, init->getType(), true, llvm::GlobalValue::InternalLinkage, init, ".str");
if (section) gvar->setSection(section);
gvar->setUnnamedAddr(true);
LLConstant* idxs[] = { DtoConstUint(0), DtoConstUint(0) };
return llvm::ConstantExpr::getGetElementPtr(gvar, idxs, true);
}
LLValue* DtoGEPi(LLValue* ptr, unsigned i0, unsigned i1, const char* var, llvm::BasicBlock* bb)
{
LLPointerType* p = isaPointer(ptr);
assert(p && "GEP expects a pointer type");
LLValue* v[] = { DtoConstUint(i0), DtoConstUint(i1) };
return llvm::GetElementPtrInst::Create(
#if LDC_LLVM_VER >= 307
p->getElementType(),
#endif
ptr, v, var, bb ? bb : gIR->scopebb());
}
LLConstant* DtoGEPi(LLConstant* ptr, unsigned i0, unsigned i1)
{
LLPointerType* p = isaPointer(ptr);
assert(p && "GEP expects a pointer type");
LLValue* v[] = { DtoConstUint(i0), DtoConstUint(i1) };
return llvm::ConstantExpr::getGetElementPtr(
#if LDC_LLVM_VER >= 307
p->getElementType(),
#endif
ptr, v, true);
}
LLConstant* DtoConstString(const char* str)
{
llvm::StringRef s(str ? str : "");
LLConstant* init = llvm::ConstantDataArray::getString(gIR->context(), s, true);
llvm::GlobalVariable* gvar = new llvm::GlobalVariable(
*gIR->module, init->getType(), true, llvm::GlobalValue::InternalLinkage, init, ".str");
gvar->setUnnamedAddr(true);
LLConstant* idxs[] = { DtoConstUint(0), DtoConstUint(0) };
return DtoConstSlice(
DtoConstSize_t(s.size()),
llvm::ConstantExpr::getGetElementPtr(gvar, idxs, true),
Type::tchar->arrayOf()
);
}
static llvm::Function* build_module_function(const std::string &name, const std::list<FuncDeclaration*> &funcs,
const std::list<VarDeclaration*> &gates = std::list<VarDeclaration*>())
{
if (gates.empty()) {
if (funcs.empty())
return NULL;
if (funcs.size() == 1)
return getIrFunc(funcs.front())->func;
}
// build ctor type
LLFunctionType* fnTy = LLFunctionType::get(LLType::getVoidTy(gIR->context()), std::vector<LLType*>(), false);
std::string const symbolName = gABI->mangleForLLVM(name, LINKd);
assert(gIR->module.getFunction(symbolName) == NULL);
llvm::Function* fn = llvm::Function::Create(fnTy,
llvm::GlobalValue::InternalLinkage, symbolName, &gIR->module);
fn->setCallingConv(gABI->callingConv(fn->getFunctionType(), LINKd));
llvm::BasicBlock* bb = llvm::BasicBlock::Create(gIR->context(), "", fn);
IRBuilder<> builder(bb);
// debug info
ldc::DISubprogram dis = gIR->DBuilder.EmitModuleCTor(fn, name.c_str());
if (global.params.symdebug) {
// Need _some_ debug info to avoid inliner bug, see GitHub issue #998.
builder.SetCurrentDebugLocation(llvm::DebugLoc::get(0, 0, dis));
}
// Call ctor's
typedef std::list<FuncDeclaration*>::const_iterator FuncIterator;
for (FuncIterator itr = funcs.begin(), end = funcs.end(); itr != end; ++itr) {
llvm::Function* f = getIrFunc(*itr)->func;
#if LDC_LLVM_VER >= 307
llvm::CallInst* call = builder.CreateCall(f, {});
#else
llvm::CallInst* call = builder.CreateCall(f, "");
#endif
call->setCallingConv(gABI->callingConv(call->
#if LDC_LLVM_VER < 307
getCalledFunction()->
#endif
getFunctionType(), LINKd));
}
// Increment vgate's
typedef std::list<VarDeclaration*>::const_iterator GatesIterator;
for (GatesIterator itr = gates.begin(), end = gates.end(); itr != end; ++itr) {
assert(getIrGlobal(*itr));
llvm::Value* val = getIrGlobal(*itr)->value;
llvm::Value* rval = builder.CreateLoad(val, "vgate");
llvm::Value* res = builder.CreateAdd(rval, DtoConstUint(1), "vgate");
builder.CreateStore(res, val);
}
builder.CreateRetVoid();
return fn;
}
void emitCoverageLinecountInc(Loc &loc) {
// Only emit coverage increment for locations in the source of the current
// module
// (for example, 'inlined' methods from other source files should be skipped).
if (!global.params.cov || !loc.linnum || !loc.filename ||
strcmp(gIR->dmodule->srcfile->name->toChars(), loc.filename) != 0) {
return;
}
const unsigned line = loc.linnum - 1; // convert to 0-based line# index
assert(line < gIR->dmodule->numlines);
IF_LOG Logger::println("Coverage: increment _d_cover_data[%d]", line);
LOG_SCOPE;
// Get GEP into _d_cover_data array
LLConstant *idxs[] = {DtoConstUint(0), DtoConstUint(line)};
LLValue *ptr = llvm::ConstantExpr::getGetElementPtr(
#if LDC_LLVM_VER >= 307
LLArrayType::get(LLType::getInt32Ty(gIR->context()),
gIR->dmodule->numlines),
#endif
gIR->dmodule->d_cover_data, idxs, true);
// Do an atomic increment, so this works when multiple threads are executed.
gIR->ir->CreateAtomicRMW(llvm::AtomicRMWInst::Add, ptr, DtoConstUint(1),
#if LDC_LLVM_VER >= 309
llvm::AtomicOrdering::Monotonic
#else
llvm::Monotonic
#endif
);
unsigned num_sizet_bits = gDataLayout->getTypeSizeInBits(DtoSize_t());
unsigned idx = line / num_sizet_bits;
unsigned bitidx = line % num_sizet_bits;
IF_LOG Logger::println("_d_cover_valid[%d] |= (1 << %d)", idx, bitidx);
gIR->dmodule->d_cover_valid_init[idx] |= (size_t(1) << bitidx);
}
void DtoMemSet(LLValue* dst, LLValue* val, LLValue* nbytes)
{
dst = DtoBitCast(dst,getVoidPtrType());
LLType* intTy = DtoSize_t();
LLType *VoidPtrTy = getVoidPtrType();
LLType *Tys[2] ={VoidPtrTy, intTy};
llvm::Function* fn = llvm::Intrinsic::getDeclaration(gIR->module,
llvm::Intrinsic::memset, llvm::makeArrayRef(Tys, 2));
gIR->ir->CreateCall5(fn, dst, val, nbytes, DtoConstUint(1), DtoConstBool(false), "");
}
void DtoMemCpy(LLValue* dst, LLValue* src, LLValue* nbytes, unsigned align)
{
dst = DtoBitCast(dst,getVoidPtrType());
src = DtoBitCast(src,getVoidPtrType());
LLType* intTy = DtoSize_t();
LLType *VoidPtrTy = getVoidPtrType();
LLType *Tys[3] ={VoidPtrTy, VoidPtrTy, intTy};
llvm::Function* fn = llvm::Intrinsic::getDeclaration(gIR->module,
llvm::Intrinsic::memcpy, llvm::makeArrayRef(Tys, 3));
gIR->ir->CreateCall5(fn, dst, src, nbytes, DtoConstUint(align), DtoConstBool(false), "");
}
static llvm::Function* build_module_function(const std::string &name, const std::list<FuncDeclaration*> &funcs,
const std::list<VarDeclaration*> &gates = std::list<VarDeclaration*>())
{
if (gates.empty()) {
if (funcs.empty())
return NULL;
if (funcs.size() == 1)
return funcs.front()->ir.irFunc->func;
}
std::vector<LLType*> argsTy;
LLFunctionType* fnTy = LLFunctionType::get(LLType::getVoidTy(gIR->context()),argsTy,false);
std::string const symbolName = gABI->mangleForLLVM(name, LINKd);
assert(gIR->module->getFunction(symbolName) == NULL);
llvm::Function* fn = llvm::Function::Create(fnTy,
llvm::GlobalValue::InternalLinkage, symbolName, gIR->module);
fn->setCallingConv(gABI->callingConv(LINKd));
llvm::BasicBlock* bb = llvm::BasicBlock::Create(gIR->context(), "entry", fn);
IRBuilder<> builder(bb);
// debug info
DtoDwarfSubProgramInternal(name.c_str(), symbolName.c_str());
// Call ctor's
typedef std::list<FuncDeclaration*>::const_iterator FuncIterator;
for (FuncIterator itr = funcs.begin(), end = funcs.end(); itr != end; ++itr) {
llvm::Function* f = (*itr)->ir.irFunc->func;
llvm::CallInst* call = builder.CreateCall(f,"");
call->setCallingConv(gABI->callingConv(LINKd));
}
// Increment vgate's
typedef std::list<VarDeclaration*>::const_iterator GatesIterator;
for (GatesIterator itr = gates.begin(), end = gates.end(); itr != end; ++itr) {
assert((*itr)->ir.irGlobal);
llvm::Value* val = (*itr)->ir.irGlobal->value;
llvm::Value* rval = builder.CreateLoad(val, "vgate");
llvm::Value* res = builder.CreateAdd(rval, DtoConstUint(1), "vgate");
builder.CreateStore(res, val);
}
builder.CreateRetVoid();
return fn;
}
llvm::BasicBlock *CleanupScope::run(IRState &irs, llvm::BasicBlock *sourceBlock,
llvm::BasicBlock *continueWith) {
#if LDC_LLVM_VER >= 308
if (useMSVCEH())
return runCopying(irs, sourceBlock, continueWith);
#endif
if (exitTargets.empty() || (exitTargets.size() == 1 &&
exitTargets[0].branchTarget == continueWith)) {
// We didn't need a branch selector before and still don't need one.
assert(!branchSelector);
// Set up the unconditional branch at the end of the cleanup if we have
// not done so already.
if (exitTargets.empty()) {
exitTargets.emplace_back(continueWith);
llvm::BranchInst::Create(continueWith, endBlock());
}
exitTargets.front().sourceBlocks.push_back(sourceBlock);
return beginBlock();
}
// We need a branch selector if we are here...
if (!branchSelector) {
// ... and have not created one yet, so do so now.
branchSelector = new llvm::AllocaInst(llvm::Type::getInt32Ty(irs.context()),
#if LDC_LLVM_VER >= 500
irs.module.getDataLayout().getAllocaAddrSpace(),
#endif
llvm::Twine("branchsel.") +
beginBlock()->getName(),
irs.topallocapoint());
// Now we also need to store 0 to it to keep the paths that go to the
// only existing branch target the same.
for (auto bb : exitTargets.front().sourceBlocks) {
new llvm::StoreInst(DtoConstUint(0), branchSelector, bb->getTerminator());
}
// And convert the BranchInst to the existing branch target to a
// SelectInst so we can append the other cases to it.
endBlock()->getTerminator()->eraseFromParent();
llvm::Value *sel = new llvm::LoadInst(branchSelector, "", endBlock());
llvm::SwitchInst::Create(
sel, exitTargets[0].branchTarget,
1, // Expected number of branches, only for pre-allocating.
endBlock());
}
// If we already know this branch target, figure out the branch selector
// value and simply insert the store into the source block (prior to the
// last instruction, which is the branch to the first cleanup).
for (unsigned i = 0; i < exitTargets.size(); ++i) {
CleanupExitTarget &t = exitTargets[i];
if (t.branchTarget == continueWith) {
new llvm::StoreInst(DtoConstUint(i), branchSelector,
sourceBlock->getTerminator());
// Note: Strictly speaking, keeping this up to date would not be
// needed right now, because we never to any optimizations that
// require changes to the source blocks after the initial conversion
// from one to two branch targets. Keeping this around for now to
// ease future development, but may be removed to save some work.
t.sourceBlocks.push_back(sourceBlock);
return beginBlock();
}
}
// We don't know this branch target yet, so add it to the SwitchInst...
llvm::ConstantInt *const selectorVal = DtoConstUint(exitTargets.size());
llvm::cast<llvm::SwitchInst>(endBlock()->getTerminator())
->addCase(selectorVal, continueWith);
// ... insert the store into the source block...
new llvm::StoreInst(selectorVal, branchSelector,
sourceBlock->getTerminator());
// ... and keep track of it (again, this is unnecessary right now as
// discussed in the above note).
exitTargets.emplace_back(continueWith);
exitTargets.back().sourceBlocks.push_back(sourceBlock);
return beginBlock();
}
LLValue* DtoGEPi1(LLValue* ptr, unsigned i, const char* var, llvm::BasicBlock* bb)
{
return llvm::GetElementPtrInst::Create(ptr, DtoConstUint(i), var?var:"tmp", bb?bb:gIR->scopebb());
}
void RTTIBuilder::push_uint(unsigned u)
{
inits.push_back(DtoConstUint(u));
}
void IRLandingPad::constructLandingPad(llvm::BasicBlock* inBB)
{
// save and rewrite scope
IRScope savedscope = gIR->scope();
gIR->scope() = IRScope(inBB,savedscope.end);
// eh_ptr = llvm.eh.exception();
llvm::Function* eh_exception_fn = GET_INTRINSIC_DECL(eh_exception);
LLValue* eh_ptr = gIR->ir->CreateCall(eh_exception_fn);
// build selector arguments
LLSmallVector<LLValue*, 6> selectorargs;
// put in classinfos in the right order
bool hasFinally = false;
bool hasCatch = false;
std::deque<IRLandingPadInfo>::iterator it = infos.begin(), end = infos.end();
for(; it != end; ++it)
{
if(it->finallyBody)
hasFinally = true;
else
{
hasCatch = true;
assert(it->catchType);
assert(it->catchType->ir.irStruct);
selectorargs.insert(selectorargs.begin(), it->catchType->ir.irStruct->getClassInfoSymbol());
}
}
// if there's a finally, the eh table has to have a 0 action
if(hasFinally)
selectorargs.push_back(DtoConstUint(0));
// personality fn
llvm::Function* personality_fn = LLVM_D_GetRuntimeFunction(gIR->module, "_d_eh_personality");
LLValue* personality_fn_arg = gIR->ir->CreateBitCast(personality_fn, getPtrToType(LLType::getInt8Ty(gIR->context())));
selectorargs.insert(selectorargs.begin(), personality_fn_arg);
// eh storage target
selectorargs.insert(selectorargs.begin(), eh_ptr);
// if there is a catch and some catch allocated storage, store exception object
if(hasCatch && catch_var)
{
const LLType* objectTy = DtoType(ClassDeclaration::object->type);
gIR->ir->CreateStore(gIR->ir->CreateBitCast(eh_ptr, objectTy), catch_var);
}
// eh_sel = llvm.eh.selector(eh_ptr, cast(byte*)&_d_eh_personality, <selectorargs>);
llvm::Function* eh_selector_fn = GET_INTRINSIC_DECL(eh_selector);
LLValue* eh_sel = gIR->ir->CreateCall(eh_selector_fn, selectorargs.begin(), selectorargs.end());
// emit finallys and 'if' chain to catch the exception
llvm::Function* eh_typeid_for_fn = GET_INTRINSIC_DECL(eh_typeid_for);
std::deque<IRLandingPadInfo> infos = this->infos;
std::stack<size_t> nInfos = this->nInfos;
std::deque<IRLandingPadInfo>::reverse_iterator rit, rend = infos.rend();
for(rit = infos.rbegin(); rit != rend; ++rit)
{
// if it's a finally, emit its code
if(rit->finallyBody)
{
size_t n = this->nInfos.top();
this->infos.resize(n);
this->nInfos.pop();
rit->finallyBody->toIR(gIR);
}
// otherwise it's a catch and we'll add a if-statement
else
{
llvm::BasicBlock *next = llvm::BasicBlock::Create(gIR->context(), "eh.next", gIR->topfunc(), gIR->scopeend());
LLValue *classInfo = DtoBitCast(rit->catchType->ir.irStruct->getClassInfoSymbol(),
getPtrToType(DtoType(Type::tint8)));
LLValue *eh_id = gIR->ir->CreateCall(eh_typeid_for_fn, classInfo);
gIR->ir->CreateCondBr(gIR->ir->CreateICmpEQ(eh_sel, eh_id), rit->target, next);
gIR->scope() = IRScope(next, gIR->scopeend());
}
}
// restore landing pad infos
this->infos = infos;
this->nInfos = nInfos;
// no catch matched and all finallys executed - resume unwind
llvm::Function* unwind_resume_fn = LLVM_D_GetRuntimeFunction(gIR->module, "_d_eh_resume_unwind");
gIR->ir->CreateCall(unwind_resume_fn, eh_ptr);
gIR->ir->CreateUnreachable();
gIR->scope() = savedscope;
}
DValue *DtoAAIndex(Loc &loc, Type *type, DValue *aa, DValue *key, bool lvalue) {
// D2:
// call:
// extern(C) void* _aaGetY(AA* aa, TypeInfo aati, size_t valuesize, void*
// pkey)
// or
// extern(C) void* _aaInX(AA aa*, TypeInfo keyti, void* pkey)
// first get the runtime function
llvm::Function *func = getRuntimeFunction(
loc, gIR->module, lvalue ? "_aaGetY" : "_aaInX");
LLFunctionType *funcTy = func->getFunctionType();
// aa param
LLValue *aaval = lvalue ? aa->getLVal() : aa->getRVal();
aaval = DtoBitCast(aaval, funcTy->getParamType(0));
// pkey param
LLValue *pkey = makeLValue(loc, key);
pkey = DtoBitCast(pkey, funcTy->getParamType(lvalue ? 3 : 2));
// call runtime
LLValue *ret;
if (lvalue) {
LLValue *rawAATI =
DtoTypeInfoOf(aa->type->unSharedOf()->mutableOf(), false);
LLValue *castedAATI = DtoBitCast(rawAATI, funcTy->getParamType(1));
LLValue *valsize = DtoConstSize_t(getTypePaddedSize(DtoType(type)));
ret = gIR->CreateCallOrInvoke(func, aaval, castedAATI, valsize, pkey,
"aa.index")
.getInstruction();
} else {
LLValue *keyti = DtoBitCast(to_keyti(aa), funcTy->getParamType(1));
ret = gIR->CreateCallOrInvoke(func, aaval, keyti, pkey, "aa.index")
.getInstruction();
}
// cast return value
LLType *targettype = DtoPtrToType(type);
if (ret->getType() != targettype) {
ret = DtoBitCast(ret, targettype);
}
// Only check bounds for rvalues ('aa[key]').
// Lvalue use ('aa[key] = value') auto-adds an element.
if (!lvalue && gIR->emitArrayBoundsChecks()) {
llvm::BasicBlock *failbb = llvm::BasicBlock::Create(
gIR->context(), "aaboundscheckfail", gIR->topfunc());
llvm::BasicBlock *okbb =
llvm::BasicBlock::Create(gIR->context(), "aaboundsok", gIR->topfunc());
LLValue *nullaa = LLConstant::getNullValue(ret->getType());
LLValue *cond = gIR->ir->CreateICmpNE(nullaa, ret, "aaboundscheck");
gIR->ir->CreateCondBr(cond, okbb, failbb);
// set up failbb to call the array bounds error runtime function
gIR->scope() = IRScope(failbb);
llvm::Function *errorfn =
getRuntimeFunction(loc, gIR->module, "_d_arraybounds");
gIR->CreateCallOrInvoke(
errorfn, DtoModuleFileName(gIR->func()->decl->getModule(), loc),
DtoConstUint(loc.linnum));
// the function does not return
gIR->ir->CreateUnreachable();
// if ok, proceed in okbb
gIR->scope() = IRScope(okbb);
}
return new DVarValue(type, ret);
}
void AsmBlockStatement_toIR(AsmBlockStatement *stmt, IRState* p)
{
IF_LOG Logger::println("AsmBlockStatement::toIR(): %s", stmt->loc.toChars());
LOG_SCOPE;
// disable inlining by default
if (!p->func()->decl->allowInlining)
p->func()->setNeverInline();
// create asm block structure
assert(!p->asmBlock);
IRAsmBlock* asmblock = new IRAsmBlock(stmt);
assert(asmblock);
p->asmBlock = asmblock;
// do asm statements
for (unsigned i=0; i < stmt->statements->dim; i++)
{
Statement* s = static_cast<Statement*>(stmt->statements->data[i]);
if (s) {
Statement_toIR(s, p);
}
}
// build forwarder for in-asm branches to external labels
// this additional asm code sets the __llvm_jump_target variable
// to a unique value that will identify the jump target in
// a post-asm switch
// maps each goto destination to its special value
std::map<LabelDsymbol*, int> gotoToVal;
// location of the special value determining the goto label
// will be set if post-asm dispatcher block is needed
llvm::AllocaInst* jump_target = 0;
{
FuncDeclaration* fd = gIR->func()->decl;
const char* fdmangle = mangle(fd);
// we use a simple static counter to make sure the new end labels are unique
static size_t uniqueLabelsId = 0;
std::ostringstream asmGotoEndLabel;
printLabelName(asmGotoEndLabel, fdmangle, "_llvm_asm_end");
asmGotoEndLabel << uniqueLabelsId++;
// initialize the setter statement we're going to build
IRAsmStmt* outSetterStmt = new IRAsmStmt;
std::string asmGotoEnd = "\n\tjmp "+asmGotoEndLabel.str()+"\n";
std::ostringstream code;
code << asmGotoEnd;
int n_goto = 1;
size_t n = asmblock->s.size();
for(size_t i=0; i<n; ++i)
{
IRAsmStmt* a = asmblock->s[i];
// skip non-branch statements
if(!a->isBranchToLabel)
continue;
// if internal, no special handling is necessary, skip
std::vector<Identifier*>::const_iterator it, end;
end = asmblock->internalLabels.end();
bool skip = false;
for(it = asmblock->internalLabels.begin(); it != end; ++it)
if((*it)->equals(a->isBranchToLabel->ident))
skip = true;
if(skip)
continue;
// if we already set things up for this branch target, skip
if(gotoToVal.find(a->isBranchToLabel) != gotoToVal.end())
continue;
// record that the jump needs to be handled in the post-asm dispatcher
gotoToVal[a->isBranchToLabel] = n_goto;
// provide an in-asm target for the branch and set value
IF_LOG Logger::println("statement '%s' references outer label '%s': creating forwarder", a->code.c_str(), a->isBranchToLabel->ident->string);
printLabelName(code, fdmangle, a->isBranchToLabel->ident->string);
code << ":\n\t";
code << "movl $<<in" << n_goto << ">>, $<<out0>>\n";
//FIXME: Store the value -> label mapping somewhere, so it can be referenced later
outSetterStmt->in.push_back(DtoConstUint(n_goto));
outSetterStmt->in_c += "i,";
code << asmGotoEnd;
++n_goto;
}
if(code.str() != asmGotoEnd)
{
// finalize code
outSetterStmt->code = code.str();
outSetterStmt->code += asmGotoEndLabel.str()+":\n";
// create storage for and initialize the temporary
jump_target = DtoAlloca(Type::tint32, "__llvm_jump_target");
gIR->ir->CreateStore(DtoConstUint(0), jump_target);
// setup variable for output from asm
outSetterStmt->out_c = "=*m,";
outSetterStmt->out.push_back(jump_target);
asmblock->s.push_back(outSetterStmt);
}
else
delete outSetterStmt;
}
// build a fall-off-end-properly asm statement
FuncDeclaration* thisfunc = p->func()->decl;
bool useabiret = false;
p->asmBlock->asmBlock->abiret = NULL;
if (thisfunc->fbody->endsWithAsm() == stmt && thisfunc->type->nextOf()->ty != Tvoid)
{
// there can't be goto forwarders in this case
assert(gotoToVal.empty());
emitABIReturnAsmStmt(asmblock, stmt->loc, thisfunc);
useabiret = true;
}
// build asm block
std::vector<LLValue*> outargs;
std::vector<LLValue*> inargs;
std::vector<LLType*> outtypes;
std::vector<LLType*> intypes;
std::string out_c;
std::string in_c;
std::string clobbers;
std::string code;
size_t asmIdx = asmblock->retn;
Logger::println("do outputs");
size_t n = asmblock->s.size();
for (size_t i=0; i<n; ++i)
{
IRAsmStmt* a = asmblock->s[i];
assert(a);
size_t onn = a->out.size();
for (size_t j=0; j<onn; ++j)
{
outargs.push_back(a->out[j]);
outtypes.push_back(a->out[j]->getType());
}
if (!a->out_c.empty())
{
out_c += a->out_c;
}
remap_outargs(a->code, onn+a->in.size(), asmIdx);
asmIdx += onn;
}
Logger::println("do inputs");
for (size_t i=0; i<n; ++i)
{
IRAsmStmt* a = asmblock->s[i];
assert(a);
size_t inn = a->in.size();
for (size_t j=0; j<inn; ++j)
{
inargs.push_back(a->in[j]);
intypes.push_back(a->in[j]->getType());
}
if (!a->in_c.empty())
{
in_c += a->in_c;
}
remap_inargs(a->code, inn+a->out.size(), asmIdx);
asmIdx += inn;
if (!code.empty())
code += "\n\t";
code += a->code;
}
asmblock->s.clear();
// append inputs
out_c += in_c;
// append clobbers
typedef std::set<std::string>::iterator clobs_it;
for (clobs_it i=asmblock->clobs.begin(); i!=asmblock->clobs.end(); ++i)
{
out_c += *i;
}
// remove excessive comma
if (!out_c.empty())
out_c.resize(out_c.size()-1);
IF_LOG {
Logger::println("code = \"%s\"", code.c_str());
Logger::println("constraints = \"%s\"", out_c.c_str());
}
// build return types
LLType* retty;
if (asmblock->retn)
retty = asmblock->retty;
else
retty = llvm::Type::getVoidTy(gIR->context());
// build argument types
std::vector<LLType*> types;
types.insert(types.end(), outtypes.begin(), outtypes.end());
types.insert(types.end(), intypes.begin(), intypes.end());
llvm::FunctionType* fty = llvm::FunctionType::get(retty, types, false);
IF_LOG Logger::cout() << "function type = " << *fty << '\n';
std::vector<LLValue*> args;
args.insert(args.end(), outargs.begin(), outargs.end());
args.insert(args.end(), inargs.begin(), inargs.end());
IF_LOG {
Logger::cout() << "Arguments:" << '\n';
Logger::indent();
for (std::vector<LLValue*>::iterator b = args.begin(), i = b, e = args.end(); i != e; ++i) {
Stream cout = Logger::cout();
cout << '$' << (i - b) << " ==> " << **i;
if (!llvm::isa<llvm::Instruction>(*i) && !llvm::isa<LLGlobalValue>(*i))
cout << '\n';
}
Logger::undent();
}
llvm::InlineAsm* ia = llvm::InlineAsm::get(fty, code, out_c, true);
llvm::CallInst* call = p->ir->CreateCall(ia, args,
retty == LLType::getVoidTy(gIR->context()) ? "" : "asm");
IF_LOG Logger::cout() << "Complete asm statement: " << *call << '\n';
// capture abi return value
if (useabiret)
{
IRAsmBlock* block = p->asmBlock;
if (block->retfixup)
block->asmBlock->abiret = (*block->retfixup)(p->ir, call);
else if (p->asmBlock->retemu)
block->asmBlock->abiret = DtoLoad(block->asmBlock->abiret);
else
block->asmBlock->abiret = call;
}
p->asmBlock = NULL;
// if asm contained external branches, emit goto forwarder code
if(!gotoToVal.empty())
{
assert(jump_target);
// make new blocks
llvm::BasicBlock* oldend = gIR->scopeend();
llvm::BasicBlock* bb = llvm::BasicBlock::Create(gIR->context(), "afterasmgotoforwarder", p->topfunc(), oldend);
llvm::LoadInst* val = p->ir->CreateLoad(jump_target, "__llvm_jump_target_value");
llvm::SwitchInst* sw = p->ir->CreateSwitch(val, bb, gotoToVal.size());
// add all cases
std::map<LabelDsymbol*, int>::iterator it, end = gotoToVal.end();
for(it = gotoToVal.begin(); it != end; ++it)
{
llvm::BasicBlock* casebb = llvm::BasicBlock::Create(gIR->context(), "case", p->topfunc(), bb);
sw->addCase(LLConstantInt::get(llvm::IntegerType::get(gIR->context(), 32), it->second), casebb);
p->scope() = IRScope(casebb,bb);
DtoGoto(stmt->loc, it->first, stmt->enclosingFinally);
}
p->scope() = IRScope(bb,oldend);
}
}
LLValue* DtoImagPart(DValue* val)
{
assert(0);
return gIR->ir->CreateExtractElement(val->getRVal(), DtoConstUint(1), "tmp");
}
LLValue *DtoGEPi1(LLValue *ptr, unsigned i0, const char *name,
llvm::BasicBlock *bb) {
return DtoGEP(ptr, DtoConstUint(i0), /* inBounds = */ true, name, bb);
}
LLConstant* DtoGEPi(LLConstant* ptr, unsigned i0, unsigned i1)
{
LLValue* v[] = { DtoConstUint(i0), DtoConstUint(i1) };
return llvm::ConstantExpr::getGetElementPtr(ptr, v, true);
}
LLValue *DtoGEPi(LLValue *ptr, unsigned i0, unsigned i1, const char *name,
llvm::BasicBlock *bb) {
LLValue *indices[] = {DtoConstUint(i0), DtoConstUint(i1)};
return DtoGEP(ptr, indices, /* inBounds = */ true, name, bb);
}
LLValue* DtoExtractElement(LLValue* vec, unsigned idx, const char* name)
{
return DtoExtractElement(vec, DtoConstUint(idx), name);
}
LLValue* DtoInsertElement(LLValue* vec, LLValue* v, unsigned idx, const char* name)
{
return DtoInsertElement(vec, v, DtoConstUint(idx), name);
}
LLValue* DtoGEPi(LLValue* ptr, unsigned i0, unsigned i1, const char* var, llvm::BasicBlock* bb)
{
LLValue* v[] = { DtoConstUint(i0), DtoConstUint(i1) };
return llvm::GetElementPtrInst::Create(ptr, v, var?var:"tmp", bb?bb:gIR->scopebb());
}
DValue* DtoAAIndex(Loc& loc, Type* type, DValue* aa, DValue* key, bool lvalue)
{
// D1:
// call:
// extern(C) void* _aaGet(AA* aa, TypeInfo keyti, size_t valuesize, void* pkey)
// or
// extern(C) void* _aaIn(AA aa*, TypeInfo keyti, void* pkey)
// D2:
// call:
// extern(C) void* _aaGetX(AA* aa, TypeInfo keyti, size_t valuesize, void* pkey)
// or
// extern(C) void* _aaInX(AA aa*, TypeInfo keyti, void* pkey)
// first get the runtime function
llvm::Function* func = LLVM_D_GetRuntimeFunction(gIR->module, lvalue?"_aaGetX":"_aaInX");
LLFunctionType* funcTy = func->getFunctionType();
// aa param
LLValue* aaval = lvalue ? aa->getLVal() : aa->getRVal();
aaval = DtoBitCast(aaval, funcTy->getParamType(0));
// keyti param
LLValue* keyti = to_keyti(aa);
keyti = DtoBitCast(keyti, funcTy->getParamType(1));
// pkey param
LLValue* pkey = makeLValue(loc, key);
pkey = DtoBitCast(pkey, funcTy->getParamType(lvalue ? 3 : 2));
// call runtime
LLValue* ret;
if (lvalue) {
// valuesize param
LLValue* valsize = DtoConstSize_t(getTypePaddedSize(DtoType(type)));
ret = gIR->CreateCallOrInvoke4(func, aaval, keyti, valsize, pkey, "aa.index").getInstruction();
} else {
ret = gIR->CreateCallOrInvoke3(func, aaval, keyti, pkey, "aa.index").getInstruction();
}
// cast return value
LLType* targettype = getPtrToType(DtoType(type));
if (ret->getType() != targettype)
ret = DtoBitCast(ret, targettype);
// Only check bounds for rvalues ('aa[key]').
// Lvalue use ('aa[key] = value') auto-adds an element.
if (!lvalue && global.params.useArrayBounds) {
llvm::BasicBlock* oldend = gIR->scopeend();
llvm::BasicBlock* failbb = llvm::BasicBlock::Create(gIR->context(), "aaboundscheckfail", gIR->topfunc(), oldend);
llvm::BasicBlock* okbb = llvm::BasicBlock::Create(gIR->context(), "aaboundsok", gIR->topfunc(), oldend);
LLValue* nullaa = LLConstant::getNullValue(ret->getType());
LLValue* cond = gIR->ir->CreateICmpNE(nullaa, ret, "aaboundscheck");
gIR->ir->CreateCondBr(cond, okbb, failbb);
// set up failbb to call the array bounds error runtime function
gIR->scope() = IRScope(failbb, okbb);
std::vector<LLValue*> args;
// module param
LLValue *moduleInfoSymbol = gIR->func()->decl->getModule()->moduleInfoSymbol();
LLType *moduleInfoType = DtoType(Module::moduleinfo->type);
args.push_back(DtoBitCast(moduleInfoSymbol, getPtrToType(moduleInfoType)));
// line param
LLConstant* c = DtoConstUint(loc.linnum);
args.push_back(c);
// call
llvm::Function* errorfn = LLVM_D_GetRuntimeFunction(gIR->module, "_d_array_bounds");
gIR->CreateCallOrInvoke(errorfn, args);
// the function does not return
gIR->ir->CreateUnreachable();
// if ok, proceed in okbb
gIR->scope() = IRScope(okbb, oldend);
}
return new DVarValue(type, ret);
}
void RTTIBuilder::push_uint(unsigned u) { push(DtoConstUint(u)); }