Mercurial > projects > ldc
view gen/structs.cpp @ 304:3ebc136702dd trunk
[svn r325] Removed dead code.
Added license info to code from GDC (David Friedman permitted us to use the files under the Artistic License).
Added asmLabel check to DtoGoto to avoid jumping into inline asm. Doesn't work currently as LabelDsymbol::asmLabel is never set to true.
author | ChristianK |
---|---|
date | Wed, 25 Jun 2008 23:42:38 +0200 |
parents | 665b81613475 |
children | aaade6ded589 |
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#include <algorithm> #include "gen/llvm.h" #include "mtype.h" #include "aggregate.h" #include "init.h" #include "declaration.h" #include "gen/irstate.h" #include "gen/tollvm.h" #include "gen/llvmhelpers.h" #include "gen/arrays.h" #include "gen/logger.h" #include "gen/structs.h" #include "ir/irstruct.h" ////////////////////////////////////////////////////////////////////////////////////////// LLConstant* DtoConstStructInitializer(StructInitializer* si) { Logger::println("DtoConstStructInitializer: %s", si->toChars()); LOG_SCOPE; TypeStruct* ts = (TypeStruct*)si->ad->type; const llvm::StructType* structtype = isaStruct(ts->ir.type->get()); Logger::cout() << "llvm struct type: " << *structtype << '\n'; assert(si->value.dim == si->vars.dim); std::vector<DUnionIdx> inits; for (int i = 0; i < si->value.dim; ++i) { Initializer* ini = (Initializer*)si->value.data[i]; assert(ini); VarDeclaration* vd = (VarDeclaration*)si->vars.data[i]; assert(vd); LLConstant* v = DtoConstInitializer(vd->type, ini); inits.push_back(DUnionIdx(vd->ir.irField->index, vd->ir.irField->indexOffset, v)); } DtoConstInitStruct((StructDeclaration*)si->ad); return si->ad->ir.irStruct->dunion->getConst(inits); } ////////////////////////////////////////////////////////////////////////////////////////// LLValue* DtoIndexStruct(LLValue* ptr, StructDeclaration* sd, Type* t, unsigned os, DStructIndexVector& idxs) { Logger::println("checking for offset %u type %s:", os, t->toChars()); LOG_SCOPE; if (idxs.empty()) idxs.push_back(0); const LLType* llt = getPtrToType(DtoType(t)); const LLType* st = getPtrToType(DtoType(sd->type)); if (ptr->getType() != st) { assert(sd->ir.irStruct->hasUnions); ptr = gIR->ir->CreateBitCast(ptr, st, "tmp"); } for (unsigned i=0; i<sd->fields.dim; ++i) { VarDeclaration* vd = (VarDeclaration*)sd->fields.data[i]; Type* vdtype = DtoDType(vd->type); //Logger::println("found %u type %s", vd->offset, vdtype->toChars()); assert(vd->ir.irField->index >= 0); if (os == vd->offset && vdtype == t) { idxs.push_back(vd->ir.irField->index); ptr = DtoGEPi(ptr, idxs, "tmp"); if (ptr->getType() != llt) ptr = gIR->ir->CreateBitCast(ptr, llt, "tmp"); if (vd->ir.irField->indexOffset) ptr = llvm::GetElementPtrInst::Create(ptr, DtoConstUint(vd->ir.irField->indexOffset), "tmp", gIR->scopebb()); return ptr; } else if (vdtype->ty == Tstruct && (vd->offset + vdtype->size()) > os) { TypeStruct* ts = (TypeStruct*)vdtype; StructDeclaration* ssd = ts->sym; idxs.push_back(vd->ir.irField->index); if (vd->ir.irField->indexOffset) { Logger::println("has union field offset"); ptr = DtoGEPi(ptr, idxs, "tmp"); if (ptr->getType() != llt) ptr = DtoBitCast(ptr, llt); ptr = llvm::GetElementPtrInst::Create(ptr, DtoConstUint(vd->ir.irField->indexOffset), "tmp", gIR->scopebb()); DStructIndexVector tmp; return DtoIndexStruct(ptr, ssd, t, os-vd->offset, tmp); } else { const LLType* sty = getPtrToType(DtoType(vd->type)); if (ptr->getType() != sty) { ptr = DtoBitCast(ptr, sty); DStructIndexVector tmp; return DtoIndexStruct(ptr, ssd, t, os-vd->offset, tmp); } else { return DtoIndexStruct(ptr, ssd, t, os-vd->offset, idxs); } } } } size_t llt_sz = getTypeStoreSize(llt->getContainedType(0)); assert(os % llt_sz == 0); ptr = DtoBitCast(ptr, llt); return llvm::GetElementPtrInst::Create(ptr, DtoConstUint(os / llt_sz), "tmp", gIR->scopebb()); } ////////////////////////////////////////////////////////////////////////////////////////// void DtoResolveStruct(StructDeclaration* sd) { if (sd->ir.resolved) return; sd->ir.resolved = true; Logger::println("DtoResolveStruct(%s): %s", sd->toChars(), sd->loc.toChars()); LOG_SCOPE; if (sd->prot() == PROTprivate && sd->getModule() != gIR->dmodule) Logger::println("using a private struct from outside its module"); TypeStruct* ts = (TypeStruct*)DtoDType(sd->type); IrStruct* irstruct = new IrStruct(ts); sd->ir.irStruct = irstruct; gIR->structs.push_back(irstruct); // fields Array* arr = &sd->fields; for (int k=0; k < arr->dim; k++) { VarDeclaration* v = (VarDeclaration*)arr->data[k]; v->toObjFile(); } bool thisModule = false; if (sd->getModule() == gIR->dmodule) thisModule = true; // methods arr = sd->members; for (int k=0; k < arr->dim; k++) { Dsymbol* s = (Dsymbol*)arr->data[k]; if (FuncDeclaration* fd = s->isFuncDeclaration()) { if (thisModule || (fd->prot() != PROTprivate)) { fd->toObjFile(); } } else if (s->isAttribDeclaration()) { s->toObjFile(); } else { Logger::println("Ignoring dsymbol '%s' in this->members of kind '%s'", s->toPrettyChars(), s->kind()); } } /*for (int k=0; k < sd->members->dim; k++) { Dsymbol* dsym = (Dsymbol*)(sd->members->data[k]); dsym->toObjFile(); }*/ Logger::println("doing struct fields"); const llvm::StructType* structtype = 0; std::vector<const LLType*> fieldtypes; if (irstruct->offsets.empty()) { Logger::println("has no fields"); fieldtypes.push_back(LLType::Int8Ty); structtype = llvm::StructType::get(fieldtypes); } else { Logger::println("has fields"); unsigned prevsize = (unsigned)-1; unsigned lastoffset = (unsigned)-1; const LLType* fieldtype = NULL; VarDeclaration* fieldinit = NULL; size_t fieldpad = 0; int idx = 0; for (IrStruct::OffsetMap::iterator i=irstruct->offsets.begin(); i!=irstruct->offsets.end(); ++i) { // first iteration if (lastoffset == (unsigned)-1) { lastoffset = i->first; assert(lastoffset == 0); fieldtype = i->second.type; fieldinit = i->second.var; prevsize = getABITypeSize(fieldtype); i->second.var->ir.irField->index = idx; } // colliding offset? else if (lastoffset == i->first) { size_t s = getABITypeSize(i->second.type); if (s > prevsize) { fieldpad += s - prevsize; prevsize = s; } sd->ir.irStruct->hasUnions = true; i->second.var->ir.irField->index = idx; } // intersecting offset? else if (i->first < (lastoffset + prevsize)) { size_t s = getABITypeSize(i->second.type); assert((i->first + s) <= (lastoffset + prevsize)); // this holds because all types are aligned to their size sd->ir.irStruct->hasUnions = true; i->second.var->ir.irField->index = idx; i->second.var->ir.irField->indexOffset = (i->first - lastoffset) / s; } // fresh offset else { // commit the field fieldtypes.push_back(fieldtype); irstruct->defaultFields.push_back(fieldinit); if (fieldpad) { fieldtypes.push_back(llvm::ArrayType::get(LLType::Int8Ty, fieldpad)); irstruct->defaultFields.push_back(NULL); idx++; } idx++; // start new lastoffset = i->first; fieldtype = i->second.type; fieldinit = i->second.var; prevsize = getABITypeSize(fieldtype); i->second.var->ir.irField->index = idx; fieldpad = 0; } } fieldtypes.push_back(fieldtype); irstruct->defaultFields.push_back(fieldinit); if (fieldpad) { fieldtypes.push_back(llvm::ArrayType::get(LLType::Int8Ty, fieldpad)); irstruct->defaultFields.push_back(NULL); } Logger::println("creating struct type"); structtype = llvm::StructType::get(fieldtypes); } // refine abstract types for stuff like: struct S{S* next;} if (irstruct->recty != 0) { llvm::PATypeHolder& pa = irstruct->recty; llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(structtype); structtype = isaStruct(pa.get()); } assert(ts->ir.type == 0); ts->ir.type = new llvm::PATypeHolder(structtype); if (sd->parent->isModule()) { gIR->module->addTypeName(sd->mangle(),structtype); } gIR->structs.pop_back(); gIR->declareList.push_back(sd); } ////////////////////////////////////////////////////////////////////////////////////////// void DtoDeclareStruct(StructDeclaration* sd) { if (sd->ir.declared) return; sd->ir.declared = true; Logger::println("DtoDeclareStruct(%s): %s", sd->toChars(), sd->loc.toChars()); LOG_SCOPE; TypeStruct* ts = (TypeStruct*)DtoDType(sd->type); std::string initname("_D"); initname.append(sd->mangle()); initname.append("6__initZ"); llvm::GlobalValue::LinkageTypes _linkage = DtoExternalLinkage(sd); llvm::GlobalVariable* initvar = new llvm::GlobalVariable(ts->ir.type->get(), true, _linkage, NULL, initname, gIR->module); sd->ir.irStruct->init = initvar; gIR->constInitList.push_back(sd); if (DtoIsTemplateInstance(sd) || sd->getModule() == gIR->dmodule) gIR->defineList.push_back(sd); } ////////////////////////////////////////////////////////////////////////////////////////// void DtoConstInitStruct(StructDeclaration* sd) { if (sd->ir.initialized) return; sd->ir.initialized = true; Logger::println("DtoConstInitStruct(%s): %s", sd->toChars(), sd->loc.toChars()); LOG_SCOPE; IrStruct* irstruct = sd->ir.irStruct; gIR->structs.push_back(irstruct); // make sure each offset knows its default initializer for (IrStruct::OffsetMap::iterator i=irstruct->offsets.begin(); i!=irstruct->offsets.end(); ++i) { IrStruct::Offset* so = &i->second; LLConstant* finit = DtoConstFieldInitializer(so->var->type, so->var->init); so->init = finit; so->var->ir.irField->constInit = finit; } const llvm::StructType* structtype = isaStruct(sd->type->ir.type->get()); // go through the field inits and build the default initializer std::vector<LLConstant*> fieldinits_ll; size_t nfi = irstruct->defaultFields.size(); for (size_t i=0; i<nfi; ++i) { LLConstant* c; if (irstruct->defaultFields[i] != NULL) { c = irstruct->defaultFields[i]->ir.irField->constInit; assert(c); } else { const llvm::ArrayType* arrty = isaArray(structtype->getElementType(i)); std::vector<LLConstant*> vals(arrty->getNumElements(), llvm::ConstantInt::get(LLType::Int8Ty, 0, false)); c = llvm::ConstantArray::get(arrty, vals); } fieldinits_ll.push_back(c); } // generate the union mapper sd->ir.irStruct->dunion = new DUnion; // uses gIR->topstruct() // always generate the constant initalizer if (!sd->zeroInit) { Logger::println("Not zero initialized"); #if 0 //assert(tk == gIR->gIR->topstruct()().size()); #ifndef LLVMD_NO_LOGGER Logger::cout() << "struct type: " << *structtype << '\n'; for (size_t k=0; k<fieldinits_ll.size(); ++k) { Logger::cout() << "Type:" << '\n'; Logger::cout() << *fieldinits_ll[k]->getType() << '\n'; Logger::cout() << "Value:" << '\n'; Logger::cout() << *fieldinits_ll[k] << '\n'; } Logger::cout() << "Initializer printed" << '\n'; #endif #endif sd->ir.irStruct->constInit = llvm::ConstantStruct::get(structtype,fieldinits_ll); } else { Logger::println("Zero initialized"); sd->ir.irStruct->constInit = llvm::ConstantAggregateZero::get(structtype); } gIR->structs.pop_back(); // emit typeinfo if (sd->getModule() == gIR->dmodule && sd->llvmInternal != LLVMnotypeinfo) DtoTypeInfoOf(sd->type, false); } ////////////////////////////////////////////////////////////////////////////////////////// void DtoDefineStruct(StructDeclaration* sd) { if (sd->ir.defined) return; sd->ir.defined = true; Logger::println("DtoDefineStruct(%s): %s", sd->toChars(), sd->loc.toChars()); LOG_SCOPE; assert(sd->type->ty == Tstruct); TypeStruct* ts = (TypeStruct*)sd->type; sd->ir.irStruct->init->setInitializer(sd->ir.irStruct->constInit); sd->ir.DModule = gIR->dmodule; } ////////////////////////////////////////////////////////////////////////////////////////// //////////////////////////// D UNION HELPER CLASS //////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////// DUnion::DUnion() { DUnionField* f = NULL; IrStruct* topstruct = gIR->topstruct(); bool unions = false; for (IrStruct::OffsetMap::iterator i=topstruct->offsets.begin(); i!=topstruct->offsets.end(); ++i) { unsigned o = i->first; IrStruct::Offset* so = &i->second; const LLType* ft = so->init->getType(); size_t sz = getABITypeSize(ft); if (f == NULL) { // new field fields.push_back(DUnionField()); f = &fields.back(); f->size = sz; f->offset = o; f->init = so->init; f->initsize = sz; f->types.push_back(ft); } else if (o == f->offset) { // same offset if (sz > f->size) f->size = sz; f->types.push_back(ft); unions = true; } else if (o < f->offset+f->size) { assert((o+sz) <= (f->offset+f->size)); unions = true; } else { fields.push_back(DUnionField()); f = &fields.back(); f->size = sz; f->offset = o; f->init = so->init; f->initsize = sz; f->types.push_back(ft); } } /*{ LOG_SCOPE; Logger::println("******** DUnion BEGIN"); size_t n = fields.size(); for (size_t i=0; i<n; ++i) { Logger::cout()<<"field #"<<i<<" offset: "<<fields[i].offset<<" size: "<<fields[i].size<<'('<<fields[i].initsize<<")\n"; LOG_SCOPE; size_t nt = fields[i].types.size(); for (size_t j=0; j<nt; ++j) { Logger::cout()<<*fields[i].types[j]<<'\n'; } } Logger::println("******** DUnion END"); }*/ } static void push_nulls(size_t nbytes, std::vector<LLConstant*>& out) { assert(nbytes > 0); std::vector<LLConstant*> i(nbytes, llvm::ConstantInt::get(LLType::Int8Ty, 0, false)); out.push_back(llvm::ConstantArray::get(llvm::ArrayType::get(LLType::Int8Ty, nbytes), i)); } LLConstant* DUnion::getConst(std::vector<DUnionIdx>& in) { std::sort(in.begin(), in.end()); std::vector<LLConstant*> out; size_t nin = in.size(); size_t nfields = fields.size(); size_t fi = 0; size_t last = 0; size_t ii = 0; size_t os = 0; for(;;) { if (fi == nfields) break; bool nextSame = (ii+1 < nin) && (in[ii+1].idx == fi); if (ii < nin && fi == in[ii].idx) { size_t s = getABITypeSize(in[ii].c->getType()); if (in[ii].idx == last) { size_t nos = in[ii].idxos * s; if (nos && nos-os) { assert(nos >= os); push_nulls(nos-os, out); } os = nos + s; } else { os = s; } out.push_back(in[ii].c); ii++; if (!nextSame) { if (os < fields[fi].size) push_nulls(fields[fi].size - os, out); os = 0; last = fi++; } continue; } // default initialize if necessary if (ii == nin || fi < in[ii].idx) { DUnionField& f = fields[fi]; out.push_back(f.init); if (f.initsize < f.size) push_nulls(f.size - f.initsize, out); last = fi++; os = 0; continue; } } std::vector<const LLType*> tys; size_t nout = out.size(); for (size_t i=0; i<nout; ++i) tys.push_back(out[i]->getType()); const llvm::StructType* st = llvm::StructType::get(tys); return llvm::ConstantStruct::get(st, out); }