Mercurial > projects > ldc
view gen/functions.cpp @ 837:331a176c1f4f
Removed error on naked, not fully complete, but I'll be doing more work on it during this Christmas, and some things do work.
Fixed taking delegate of final class method. see mini/delegate3.d.
author | Tomas Lindquist Olsen <tomas.l.olsen@gmail.com> |
---|---|
date | Tue, 09 Dec 2008 14:07:30 +0100 |
parents | 504a21e81a46 |
children | 94ba810ea2b0 |
line wrap: on
line source
#include "gen/llvm.h" #include "llvm/Support/CFG.h" #include "llvm/Intrinsics.h" #include "mtype.h" #include "aggregate.h" #include "init.h" #include "declaration.h" #include "template.h" #include "module.h" #include "statement.h" #include "gen/irstate.h" #include "gen/tollvm.h" #include "gen/llvmhelpers.h" #include "gen/runtime.h" #include "gen/arrays.h" #include "gen/logger.h" #include "gen/functions.h" #include "gen/todebug.h" #include "gen/classes.h" #include "gen/dvalue.h" #include <algorithm> const llvm::FunctionType* DtoFunctionType(Type* type, const LLType* thistype, const LLType* nesttype, bool ismain) { assert(type->ty == Tfunction); TypeFunction* f = (TypeFunction*)type; if (type->ir.type != NULL) { return llvm::cast<llvm::FunctionType>(type->ir.type->get()); } bool dVararg = false; bool arrayVararg = false; if (f->linkage == LINKd) { if (f->varargs == 1) dVararg = true; else if (f->varargs == 2) arrayVararg = true; } // return value type const LLType* rettype; const LLType* actualRettype; Type* rt = f->next; bool retinptr = false; bool usesthis = false; bool usesnest = false; // parameter types std::vector<const LLType*> paramvec; if (ismain) { rettype = LLType::Int32Ty; actualRettype = rettype; if (Argument::dim(f->parameters) == 0) { const LLType* arrTy = DtoArrayType(LLType::Int8Ty); const LLType* arrArrTy = DtoArrayType(arrTy); paramvec.push_back(arrArrTy); } } else{ assert(rt); if (DtoIsReturnedInArg(rt)) { rettype = getPtrToType(DtoType(rt)); actualRettype = LLType::VoidTy; f->retInPtr = retinptr = true; } else { rettype = DtoType(rt); actualRettype = rettype; } if (unsigned ea = DtoShouldExtend(rt)) { f->retAttrs |= ea; } } if (retinptr) { //Logger::cout() << "returning through pointer parameter: " << *rettype << '\n'; paramvec.push_back(rettype); } if (thistype) { paramvec.push_back(thistype); usesthis = true; } else if (nesttype) { paramvec.push_back(nesttype); usesnest = true; } if (dVararg) { paramvec.push_back(DtoType(Type::typeinfo->type->arrayOf())); // _arguments paramvec.push_back(getVoidPtrType()); // _argptr } // number of formal params size_t n = Argument::dim(f->parameters); #if X86_REVERSE_PARAMS // on x86 we need to reverse the formal params in some cases to match the ABI if (global.params.cpu == ARCHx86) { // more than one formal arg, // extern(D) linkage // not a D-style vararg if (n > 1 && f->linkage == LINKd && !dVararg) { f->reverseParams = true; f->reverseIndex = paramvec.size(); } } #endif // X86_REVERSE_PARAMS for (int i=0; i < n; ++i) { Argument* arg = Argument::getNth(f->parameters, i); // ensure scalar Type* argT = arg->type->toBasetype(); assert(argT); bool refOrOut = ((arg->storageClass & STCref) || (arg->storageClass & STCout)); const LLType* at = DtoType(argT); // handle lazy args if (arg->storageClass & STClazy) { Logger::println("lazy param"); TypeFunction *ltf = new TypeFunction(NULL, arg->type, 0, LINKd); TypeDelegate *ltd = new TypeDelegate(ltf); at = DtoType(ltd); paramvec.push_back(at); } // opaque types need special handling else if (llvm::isa<llvm::OpaqueType>(at)) { Logger::println("opaque param"); assert(argT->ty == Tstruct || argT->ty == Tclass); paramvec.push_back(getPtrToType(at)); } // structs are passed as a reference, but by value else if (argT->ty == Tstruct) { Logger::println("struct param"); if (!refOrOut) arg->llvmAttrs |= llvm::Attribute::ByVal; paramvec.push_back(getPtrToType(at)); } // static arrays are passed directly by reference else if (argT->ty == Tsarray) { Logger::println("static array param"); at = getPtrToType(at); paramvec.push_back(at); } // firstclass ' ref/out ' parameter else if (refOrOut) { Logger::println("ref/out param"); at = getPtrToType(at); paramvec.push_back(at); } // firstclass ' in ' parameter else { Logger::println("in param"); if (unsigned ea = DtoShouldExtend(argT)) arg->llvmAttrs |= ea; paramvec.push_back(at); } } // reverse params? if (f->reverseParams) { std::reverse(paramvec.begin() + f->reverseIndex, paramvec.end()); } // construct function type bool isvararg = !(dVararg || arrayVararg) && f->varargs; llvm::FunctionType* functype = llvm::FunctionType::get(actualRettype, paramvec, isvararg); #if X86_PASS_IN_EAX // tell first param to be passed in a register if we can // ONLY extern(D) functions ! if ((n > 0 || usesthis || usesnest) && f->linkage == LINKd) { // FIXME: Only x86 right now ... if (global.params.cpu == ARCHx86) { // pass first param in EAX if it fits, is not floating point and is not a 3 byte struct. // FIXME: struct are not passed in EAX yet int n_inreg = f->reverseParams ? n - 1 : 0; Argument* arg = Argument::getNth(f->parameters, n_inreg); // if there is a implicit context parameter, pass it in EAX if (usesthis || usesnest) { f->thisAttrs |= llvm::Attribute::InReg; assert((!arg || (arg->llvmAttrs & llvm::Attribute::InReg) == 0) && "can't have two inreg args!"); } // otherwise check the first formal parameter else { Type* t = arg->type->toBasetype(); // 32bit ints, pointers, classes, static arrays and AAs // are candidate for being passed in EAX if ((arg->storageClass & STCin) && ((t->isscalar() && !t->isfloating()) || t->ty == Tclass || t->ty == Tsarray || t->ty == Taarray) && (t->size() <= PTRSIZE)) { arg->llvmAttrs |= llvm::Attribute::InReg; assert((f->thisAttrs & llvm::Attribute::InReg) == 0 && "can't have two inreg args!"); } } } } #endif // X86_PASS_IN_EAX // done f->retInPtr = retinptr; f->usesThis = usesthis; f->usesNest = usesnest; f->ir.type = new llvm::PATypeHolder(functype); return functype; } ////////////////////////////////////////////////////////////////////////////////////////// static const llvm::FunctionType* DtoVaFunctionType(FuncDeclaration* fdecl) { // type has already been resolved if (fdecl->type->ir.type != 0) { return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); } TypeFunction* f = (TypeFunction*)fdecl->type; const llvm::FunctionType* fty = 0; if (fdecl->llvmInternal == LLVMva_start) fty = GET_INTRINSIC_DECL(vastart)->getFunctionType(); else if (fdecl->llvmInternal == LLVMva_copy) fty = GET_INTRINSIC_DECL(vacopy)->getFunctionType(); else if (fdecl->llvmInternal == LLVMva_end) fty = GET_INTRINSIC_DECL(vaend)->getFunctionType(); assert(fty); f->ir.type = new llvm::PATypeHolder(fty); return fty; } ////////////////////////////////////////////////////////////////////////////////////////// const llvm::FunctionType* DtoFunctionType(FuncDeclaration* fdecl) { // handle for C vararg intrinsics if (fdecl->isVaIntrinsic()) return DtoVaFunctionType(fdecl); // type has already been resolved if (fdecl->type->ir.type != 0) return llvm::cast<llvm::FunctionType>(fdecl->type->ir.type->get()); const LLType* thisty = 0; const LLType* nestty = 0; if (fdecl->needThis()) { if (AggregateDeclaration* ad = fdecl->isMember2()) { Logger::println("isMember = this is: %s", ad->type->toChars()); thisty = DtoType(ad->type); //Logger::cout() << "this llvm type: " << *thisty << '\n'; if (isaStruct(thisty) || (!gIR->structs.empty() && thisty == gIR->topstruct()->type->ir.type->get())) thisty = getPtrToType(thisty); } else { Logger::println("chars: %s type: %s kind: %s", fdecl->toChars(), fdecl->type->toChars(), fdecl->kind()); assert(0); } } else if (fdecl->isNested()) { nestty = getPtrToType(LLType::Int8Ty); } const llvm::FunctionType* functype = DtoFunctionType(fdecl->type, thisty, nestty, fdecl->isMain()); return functype; } ////////////////////////////////////////////////////////////////////////////////////////// static llvm::Function* DtoDeclareVaFunction(FuncDeclaration* fdecl) { TypeFunction* f = (TypeFunction*)fdecl->type->toBasetype(); const llvm::FunctionType* fty = DtoVaFunctionType(fdecl); llvm::Function* func = 0; if (fdecl->llvmInternal == LLVMva_start) func = GET_INTRINSIC_DECL(vastart); else if (fdecl->llvmInternal == LLVMva_copy) func = GET_INTRINSIC_DECL(vacopy); else if (fdecl->llvmInternal == LLVMva_end) func = GET_INTRINSIC_DECL(vaend); assert(func); fdecl->ir.irFunc->func = func; return func; } ////////////////////////////////////////////////////////////////////////////////////////// void DtoResolveFunction(FuncDeclaration* fdecl) { if (!global.params.useUnitTests && fdecl->isUnitTestDeclaration()) { return; // ignore declaration completely } // is imported and we don't have access? if (fdecl->getModule() != gIR->dmodule) { if (fdecl->prot() == PROTprivate) return; } if (fdecl->ir.resolved) return; fdecl->ir.resolved = true; Logger::println("DtoResolveFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); LOG_SCOPE; //printf("resolve function: %s\n", fdecl->toPrettyChars()); if (fdecl->parent) if (TemplateInstance* tinst = fdecl->parent->isTemplateInstance()) { TemplateDeclaration* tempdecl = tinst->tempdecl; if (tempdecl->llvmInternal == LLVMva_arg) { Logger::println("magic va_arg found"); fdecl->llvmInternal = LLVMva_arg; fdecl->ir.declared = true; fdecl->ir.initialized = true; fdecl->ir.defined = true; return; // this gets mapped to an instruction so a declaration makes no sence } else if (tempdecl->llvmInternal == LLVMva_start) { Logger::println("magic va_start found"); fdecl->llvmInternal = LLVMva_start; } else if (tempdecl->llvmInternal == LLVMintrinsic) { Logger::println("overloaded intrinsic found"); fdecl->llvmInternal = LLVMintrinsic; DtoOverloadedIntrinsicName(tinst, tempdecl, fdecl->intrinsicName); fdecl->linkage = LINKintrinsic; ((TypeFunction*)fdecl->type)->linkage = LINKintrinsic; } } DtoFunctionType(fdecl); // queue declaration if (!fdecl->isAbstract()) gIR->declareList.push_back(fdecl); } ////////////////////////////////////////////////////////////////////////////////////////// static void set_param_attrs(TypeFunction* f, llvm::Function* func, FuncDeclaration* fdecl) { int llidx = 0; if (f->retInPtr) ++llidx; if (f->usesThis) ++llidx; else if (f->usesNest) ++llidx; if (f->linkage == LINKd && f->varargs == 1) llidx += 2; int funcNumArgs = func->getArgumentList().size(); LLSmallVector<llvm::AttributeWithIndex, 9> attrs; llvm::AttributeWithIndex PAWI; // set return value attrs if any if (f->retAttrs) { PAWI.Index = 0; PAWI.Attrs = f->retAttrs; attrs.push_back(PAWI); } // set sret param if (f->retInPtr) { PAWI.Index = 1; PAWI.Attrs = llvm::Attribute::StructRet; attrs.push_back(PAWI); } // set this/nest param attrs if (f->thisAttrs) { PAWI.Index = f->retInPtr ? 2 : 1; PAWI.Attrs = f->thisAttrs; attrs.push_back(PAWI); } // set attrs on the rest of the arguments size_t n = Argument::dim(f->parameters); assert(funcNumArgs >= n); // main might mismatch, for the implicit char[][] arg LLSmallVector<unsigned,8> attrptr(n, 0); for (size_t k = 0; k < n; ++k) { Argument* fnarg = Argument::getNth(f->parameters, k); assert(fnarg); attrptr[k] = fnarg->llvmAttrs; } // reverse params? if (f->reverseParams) { std::reverse(attrptr.begin(), attrptr.end()); } // build rest of attrs list for (int i = 0; i < n; i++) { if (attrptr[i]) { PAWI.Index = llidx+i+1; PAWI.Attrs = attrptr[i]; attrs.push_back(PAWI); } } llvm::AttrListPtr attrlist = llvm::AttrListPtr::get(attrs.begin(), attrs.end()); func->setAttributes(attrlist); } ////////////////////////////////////////////////////////////////////////////////////////// void DtoDeclareFunction(FuncDeclaration* fdecl) { if (fdecl->ir.declared) return; fdecl->ir.declared = true; Logger::println("DtoDeclareFunction(%s): %s", fdecl->toPrettyChars(), fdecl->loc.toChars()); LOG_SCOPE; //printf("declare function: %s\n", fdecl->toPrettyChars()); // intrinsic sanity check if (fdecl->llvmInternal == LLVMintrinsic && fdecl->fbody) { error(fdecl->loc, "intrinsics cannot have function bodies"); fatal(); } // get TypeFunction* Type* t = fdecl->type->toBasetype(); TypeFunction* f = (TypeFunction*)t; bool declareOnly = false; bool templInst = fdecl->parent && DtoIsTemplateInstance(fdecl->parent); if (!templInst && fdecl->getModule() != gIR->dmodule) { Logger::println("not template instance, and not in this module. declare only!"); Logger::println("current module: %s", gIR->dmodule->ident->toChars()); if(fdecl->getModule()) Logger::println("func module: %s", fdecl->getModule()->ident->toChars()); else { Logger::println("func not in a module, is runtime"); } declareOnly = true; } else if (fdecl->llvmInternal == LLVMva_start) declareOnly = true; if (!fdecl->ir.irFunc) { fdecl->ir.irFunc = new IrFunction(fdecl); } // mangled name const char* mangled_name; if (fdecl->llvmInternal == LLVMintrinsic) mangled_name = fdecl->intrinsicName.c_str(); else mangled_name = fdecl->mangle(); llvm::Function* vafunc = 0; if (fdecl->isVaIntrinsic()) vafunc = DtoDeclareVaFunction(fdecl); // construct function const llvm::FunctionType* functype = DtoFunctionType(fdecl); llvm::Function* func = vafunc ? vafunc : gIR->module->getFunction(mangled_name); if (!func) func = llvm::Function::Create(functype, DtoLinkage(fdecl), mangled_name, gIR->module); // add func to IRFunc fdecl->ir.irFunc->func = func; // calling convention if (!vafunc && fdecl->llvmInternal != LLVMintrinsic) func->setCallingConv(DtoCallingConv(f->linkage)); else // fall back to C, it should be the right thing to do func->setCallingConv(llvm::CallingConv::C); fdecl->ir.irFunc->func = func; assert(llvm::isa<llvm::FunctionType>(f->ir.type->get())); // parameter attributes if (!fdecl->isIntrinsic()) { set_param_attrs(f, func, fdecl); } // main if (fdecl->isMain()) { gIR->mainFunc = func; } // static ctor if (fdecl->isStaticCtorDeclaration() && fdecl->getModule() == gIR->dmodule) { gIR->ctors.push_back(fdecl); } // static dtor else if (fdecl->isStaticDtorDeclaration() && fdecl->getModule() == gIR->dmodule) { gIR->dtors.push_back(fdecl); } // we never reference parameters of function prototypes std::string str; if (!declareOnly) { // name parameters llvm::Function::arg_iterator iarg = func->arg_begin(); if (f->retInPtr) { iarg->setName(".sret_arg"); fdecl->ir.irFunc->retArg = iarg; ++iarg; } if (f->usesThis) { iarg->setName(".this_arg"); fdecl->ir.irFunc->thisArg = iarg; assert(fdecl->ir.irFunc->thisArg); ++iarg; } else if (f->usesNest) { iarg->setName(".nest_arg"); fdecl->ir.irFunc->nestArg = iarg; assert(fdecl->ir.irFunc->nestArg); ++iarg; } if (f->linkage == LINKd && f->varargs == 1) { iarg->setName("._arguments"); fdecl->ir.irFunc->_arguments = iarg; ++iarg; iarg->setName("._argptr"); fdecl->ir.irFunc->_argptr = iarg; ++iarg; } int k = 0; for (; iarg != func->arg_end(); ++iarg) { if (fdecl->parameters && fdecl->parameters->dim > k) { Dsymbol* argsym; if (f->reverseParams) argsym = (Dsymbol*)fdecl->parameters->data[fdecl->parameters->dim-k-1]; else argsym = (Dsymbol*)fdecl->parameters->data[k]; VarDeclaration* argvd = argsym->isVarDeclaration(); assert(argvd); assert(!argvd->ir.irLocal); argvd->ir.irLocal = new IrLocal(argvd); argvd->ir.irLocal->value = iarg; str = argvd->ident->toChars(); str.append("_arg"); iarg->setName(str); k++; } else { iarg->setName("unnamed"); } } } if (fdecl->isUnitTestDeclaration() && !declareOnly) gIR->unitTests.push_back(fdecl); if (!declareOnly) gIR->defineList.push_back(fdecl); else assert(func->getLinkage() != llvm::GlobalValue::InternalLinkage); if (Logger::enabled()) Logger::cout() << "func decl: " << *func << '\n'; } ////////////////////////////////////////////////////////////////////////////////////////// void DtoDefineFunc(FuncDeclaration* fd) { if (fd->ir.defined) return; fd->ir.defined = true; assert(fd->ir.declared); Logger::println("DtoDefineFunc(%s): %s", fd->toPrettyChars(), fd->loc.toChars()); LOG_SCOPE; // debug info if (global.params.symdebug) { Module* mo = fd->getModule(); fd->ir.irFunc->dwarfSubProg = DtoDwarfSubProgram(fd); } Type* t = fd->type->toBasetype(); TypeFunction* f = (TypeFunction*)t; assert(f->ir.type); llvm::Function* func = fd->ir.irFunc->func; const llvm::FunctionType* functype = func->getFunctionType(); // only members of the current module or template instances maybe be defined if (!(fd->getModule() == gIR->dmodule || DtoIsTemplateInstance(fd->parent))) return; // set module owner fd->ir.DModule = gIR->dmodule; // is there a body? if (fd->fbody == NULL) return; Logger::println("Doing function body for: %s", fd->toChars()); assert(fd->ir.irFunc); IrFunction* irfunction = fd->ir.irFunc; gIR->functions.push_back(irfunction); if (fd->isMain()) gIR->emitMain = true; std::string entryname("entry"); llvm::BasicBlock* beginbb = llvm::BasicBlock::Create(entryname,func); llvm::BasicBlock* endbb = llvm::BasicBlock::Create("endentry",func); //assert(gIR->scopes.empty()); gIR->scopes.push_back(IRScope(beginbb, endbb)); // create alloca point llvm::Instruction* allocaPoint = new llvm::AllocaInst(LLType::Int32Ty, "alloca point", beginbb); irfunction->allocapoint = allocaPoint; // debug info - after all allocas, but before any llvm.dbg.declare etc if (global.params.symdebug) DtoDwarfFuncStart(fd); // need result variable? if (fd->vresult) { Logger::println("vresult value"); fd->vresult->ir.irLocal = new IrLocal(fd->vresult); fd->vresult->ir.irLocal->value = DtoAlloca(DtoType(fd->vresult->type), "function_vresult"); } // this hack makes sure the frame pointer elimination optimization is disabled. // this this eliminates a bunch of inline asm related issues. // naked must always eliminate the framepointer however... if (fd->inlineAsm && !fd->naked) { // emit a call to llvm_eh_unwind_init LLFunction* hack = GET_INTRINSIC_DECL(eh_unwind_init); gIR->ir->CreateCall(hack, ""); } // give the 'this' argument storage and debug info if (f->usesThis) { LLValue* thisvar = irfunction->thisArg; assert(thisvar); LLValue* thismem = DtoAlloca(thisvar->getType(), "this"); DtoStore(thisvar, thismem); irfunction->thisArg = thismem; assert(!fd->vthis->ir.irLocal); fd->vthis->ir.irLocal = new IrLocal(fd->vthis); fd->vthis->ir.irLocal->value = thismem; if (global.params.symdebug) DtoDwarfLocalVariable(thismem, fd->vthis); #if DMDV2 if (fd->vthis->nestedrefs.dim) #else if (fd->vthis->nestedref) #endif { fd->nestedVars.insert(fd->vthis); } } // give arguments storage // and debug info if (fd->parameters) { size_t n = fd->parameters->dim; for (int i=0; i < n; ++i) { Dsymbol* argsym = (Dsymbol*)fd->parameters->data[i]; VarDeclaration* vd = argsym->isVarDeclaration(); assert(vd); #if DMDV2 if (vd->nestedrefs.dim) #else if (vd->nestedref) #endif { fd->nestedVars.insert(vd); } IrLocal* irloc = vd->ir.irLocal; assert(irloc); bool refout = vd->storage_class & (STCref | STCout); bool lazy = vd->storage_class & STClazy; if (!refout && (!DtoIsPassedByRef(vd->type) || lazy)) { LLValue* a = irloc->value; LLValue* v = DtoAlloca(a->getType(), vd->ident->toChars()); DtoStore(a,v); irloc->value = v; } if (global.params.symdebug && !(isaArgument(irloc->value) && !isaArgument(irloc->value)->hasByValAttr()) && !refout) DtoDwarfLocalVariable(irloc->value, vd); } } // need result variable? (nested) #if DMDV2 if (fd->vresult && fd->vresult->nestedrefs.dim) { #else if (fd->vresult && fd->vresult->nestedref) { #endif Logger::println("nested vresult value: %s", fd->vresult->toChars()); fd->nestedVars.insert(fd->vresult); } // construct nested variables array if (!fd->nestedVars.empty()) { Logger::println("has nested frame"); // start with add all enclosing parent frames int nparelems = 0; Dsymbol* par = fd->toParent2(); while (par) { if (FuncDeclaration* parfd = par->isFuncDeclaration()) { nparelems += parfd->nestedVars.size(); } else if (ClassDeclaration* parcd = par->isClassDeclaration()) { // nothing needed } else { break; } par = par->toParent2(); } int nelems = fd->nestedVars.size() + nparelems; // make array type for nested vars const LLType* nestedVarsTy = LLArrayType::get(getVoidPtrType(), nelems); // alloca it LLValue* nestedVars = DtoAlloca(nestedVarsTy, ".nested_vars"); // copy parent frame into beginning if (nparelems) { LLValue* src = irfunction->nestArg; if (!src) { assert(irfunction->thisArg); assert(fd->isMember2()); LLValue* thisval = DtoLoad(irfunction->thisArg); ClassDeclaration* cd = fd->isMember2()->isClassDeclaration(); assert(cd); assert(cd->vthis); src = DtoLoad(DtoGEPi(thisval, 0,cd->vthis->ir.irField->index, ".vthis")); } DtoMemCpy(nestedVars, src, DtoConstSize_t(nparelems*PTRSIZE)); } // store in IrFunction irfunction->nestedVar = nestedVars; // go through all nested vars and assign indices int idx = nparelems; for (std::set<VarDeclaration*>::iterator i=fd->nestedVars.begin(); i!=fd->nestedVars.end(); ++i) { VarDeclaration* vd = *i; if (!vd->ir.irLocal) vd->ir.irLocal = new IrLocal(vd); if (vd->isParameter()) { Logger::println("nested param: %s", vd->toChars()); LLValue* gep = DtoGEPi(nestedVars, 0, idx); LLValue* val = DtoBitCast(vd->ir.irLocal->value, getVoidPtrType()); DtoStore(val, gep); } else { Logger::println("nested var: %s", vd->toChars()); } vd->ir.irLocal->nestedIndex = idx++; } // fixup nested result variable #if DMDV2 if (fd->vresult && fd->vresult->nestedrefs.dim) { #else if (fd->vresult && fd->vresult->nestedref) { #endif Logger::println("nested vresult value: %s", fd->vresult->toChars()); LLValue* gep = DtoGEPi(nestedVars, 0, fd->vresult->ir.irLocal->nestedIndex); LLValue* val = DtoBitCast(fd->vresult->ir.irLocal->value, getVoidPtrType()); DtoStore(val, gep); } } // copy _argptr and _arguments to a memory location if (f->linkage == LINKd && f->varargs == 1) { // _argptr LLValue* argptrmem = DtoAlloca(fd->ir.irFunc->_argptr->getType(), "_argptr_mem"); new llvm::StoreInst(fd->ir.irFunc->_argptr, argptrmem, gIR->scopebb()); fd->ir.irFunc->_argptr = argptrmem; // _arguments LLValue* argumentsmem = DtoAlloca(fd->ir.irFunc->_arguments->getType(), "_arguments_mem"); new llvm::StoreInst(fd->ir.irFunc->_arguments, argumentsmem, gIR->scopebb()); fd->ir.irFunc->_arguments = argumentsmem; } // output function body fd->fbody->toIR(gIR); // llvm requires all basic blocks to end with a TerminatorInst but DMD does not put a return statement // in automatically, so we do it here. if (!gIR->scopereturned()) { // pass the previous block into this block if (global.params.symdebug) DtoDwarfFuncEnd(fd); if (func->getReturnType() == LLType::VoidTy) { llvm::ReturnInst::Create(gIR->scopebb()); } else { if (!fd->isMain()) llvm::ReturnInst::Create(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb()); else llvm::ReturnInst::Create(llvm::Constant::getNullValue(func->getReturnType()), gIR->scopebb()); } } // erase alloca point allocaPoint->eraseFromParent(); allocaPoint = 0; gIR->func()->allocapoint = 0; gIR->scopes.pop_back(); // get rid of the endentry block, it's never used assert(!func->getBasicBlockList().empty()); func->getBasicBlockList().pop_back(); // if the last block is empty now, it must be unreachable or it's a bug somewhere else // would be nice to figure out how to assert that this is correct llvm::BasicBlock* lastbb = &func->getBasicBlockList().back(); if (lastbb->empty()) { new llvm::UnreachableInst(lastbb); } // if the last block is not terminated we return a null value or void // for some unknown reason this is needed when a void main() has a inline asm block ... // this should be harmless for well formed code! lastbb = &func->getBasicBlockList().back(); if (!lastbb->getTerminator()) { Logger::println("adding missing return statement"); if (func->getReturnType() == LLType::VoidTy) llvm::ReturnInst::Create(lastbb); else llvm::ReturnInst::Create(llvm::Constant::getNullValue(func->getReturnType()), lastbb); } gIR->functions.pop_back(); } ////////////////////////////////////////////////////////////////////////////////////////// const llvm::FunctionType* DtoBaseFunctionType(FuncDeclaration* fdecl) { Dsymbol* parent = fdecl->toParent(); ClassDeclaration* cd = parent->isClassDeclaration(); assert(cd); FuncDeclaration* f = fdecl; while (cd) { ClassDeclaration* base = cd->baseClass; if (!base) break; FuncDeclaration* f2 = base->findFunc(fdecl->ident, (TypeFunction*)fdecl->type); if (f2) { f = f2; cd = base; } else break; } DtoResolveDsymbol(f); return llvm::cast<llvm::FunctionType>(DtoType(f->type)); } ////////////////////////////////////////////////////////////////////////////////////////// DValue* DtoArgument(Argument* fnarg, Expression* argexp) { Logger::println("DtoArgument"); LOG_SCOPE; DValue* arg = argexp->toElem(gIR); // ref/out arg if (fnarg && (fnarg->storageClass & (STCref | STCout))) { if (arg->isVar() || arg->isLRValue()) arg = new DImValue(argexp->type, arg->getLVal()); else arg = new DImValue(argexp->type, arg->getRVal()); } // lazy arg else if (fnarg && (fnarg->storageClass & STClazy)) { assert(argexp->type->toBasetype()->ty == Tdelegate); assert(!arg->isLVal()); return arg; } // byval arg, but expr has no storage yet else if (DtoIsPassedByRef(argexp->type) && (arg->isSlice() || arg->isNull())) { LLValue* alloc = DtoAlloca(DtoType(argexp->type), ".tmp_arg"); DVarValue* vv = new DVarValue(argexp->type, alloc); DtoAssign(argexp->loc, vv, arg); arg = vv; } return arg; } ////////////////////////////////////////////////////////////////////////////////////////// void DtoVariadicArgument(Expression* argexp, LLValue* dst) { Logger::println("DtoVariadicArgument"); LOG_SCOPE; DVarValue vv(argexp->type, dst); DtoAssign(argexp->loc, &vv, argexp->toElem(gIR)); } ////////////////////////////////////////////////////////////////////////////////////////// bool FuncDeclaration::isIntrinsic() { return (llvmInternal == LLVMintrinsic || isVaIntrinsic()); } bool FuncDeclaration::isVaIntrinsic() { return (llvmInternal == LLVMva_start || llvmInternal == LLVMva_copy || llvmInternal == LLVMva_end); }