mirror of
https://github.com/ldc-developers/ldc.git
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676 lines
19 KiB
C++
676 lines
19 KiB
C++
//===-- module.cpp --------------------------------------------------------===//
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//
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// LDC – the LLVM D compiler
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//
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// This file is distributed under the BSD-style LDC license. See the LICENSE
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// file for details.
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//
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//===----------------------------------------------------------------------===//
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#include "gen/llvm.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/LinkAllPasses.h"
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#if LDC_LLVM_VER >= 303
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#include "llvm/IR/Module.h"
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#include "llvm/IR/DataLayout.h"
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#else
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#include "llvm/Module.h"
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#if LDC_LLVM_VER == 302
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#include "llvm/DataLayout.h"
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#else
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#include "llvm/Target/TargetData.h"
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#endif
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#endif
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#include "mars.h"
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#include "module.h"
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#include "mtype.h"
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#include "declaration.h"
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#include "statement.h"
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#include "enum.h"
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#include "aggregate.h"
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#include "init.h"
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#include "attrib.h"
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#include "id.h"
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#include "import.h"
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#include "template.h"
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#include "scope.h"
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#include "gen/abi.h"
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#include "gen/arrays.h"
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#include "gen/classes.h"
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#include "gen/functions.h"
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#include "gen/irstate.h"
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#include "gen/llvmhelpers.h"
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#include "gen/logger.h"
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#include "gen/programs.h"
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#include "gen/rttibuilder.h"
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#include "gen/runtime.h"
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#include "gen/structs.h"
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#include "gen/todebug.h"
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#include "gen/tollvm.h"
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#include "gen/optimizer.h"
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#include "ir/irdsymbol.h"
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#include "ir/irmodule.h"
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#include "ir/irtype.h"
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#include "ir/irvar.h"
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#if !MODULEINFO_IS_STRUCT
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#include "ir/irtypeclass.h"
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#endif
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#if DMDV2
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#define NEW_MODULEINFO_LAYOUT 1
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#endif
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static llvm::Function* build_module_function(const std::string &name, const std::list<FuncDeclaration*> &funcs,
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const std::list<VarDeclaration*> &gates = std::list<VarDeclaration*>())
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{
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if (gates.empty()) {
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if (funcs.empty())
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return NULL;
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if (funcs.size() == 1)
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return funcs.front()->ir.irFunc->func;
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}
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std::vector<LLType*> argsTy;
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LLFunctionType* fnTy = LLFunctionType::get(LLType::getVoidTy(gIR->context()),argsTy,false);
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assert(gIR->module->getFunction(name) == NULL);
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llvm::Function* fn = llvm::Function::Create(fnTy, llvm::GlobalValue::InternalLinkage, name, gIR->module);
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fn->setCallingConv(DtoCallingConv(0, LINKd));
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llvm::BasicBlock* bb = llvm::BasicBlock::Create(gIR->context(), "entry", fn);
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IRBuilder<> builder(bb);
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// debug info
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DtoDwarfSubProgramInternal(name.c_str(), name.c_str());
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// Call ctor's
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typedef std::list<FuncDeclaration*>::const_iterator FuncIterator;
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for (FuncIterator itr = funcs.begin(), end = funcs.end(); itr != end; ++itr) {
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llvm::Function* f = (*itr)->ir.irFunc->func;
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llvm::CallInst* call = builder.CreateCall(f,"");
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call->setCallingConv(DtoCallingConv(0, LINKd));
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}
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// Increment vgate's
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typedef std::list<VarDeclaration*>::const_iterator GatesIterator;
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for (GatesIterator itr = gates.begin(), end = gates.end(); itr != end; ++itr) {
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assert((*itr)->ir.irGlobal);
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llvm::Value* val = (*itr)->ir.irGlobal->value;
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llvm::Value* rval = builder.CreateLoad(val, "vgate");
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llvm::Value* res = builder.CreateAdd(rval, DtoConstUint(1), "vgate");
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builder.CreateStore(res, val);
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}
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builder.CreateRetVoid();
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return fn;
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}
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// build module ctor
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llvm::Function* build_module_ctor()
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{
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std::string name("_D");
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name.append(gIR->dmodule->mangle());
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name.append("6__ctorZ");
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#if DMDV2
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return build_module_function(name, gIR->ctors, gIR->gates);
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#else
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return build_module_function(name, gIR->ctors);
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#endif
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}
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// build module dtor
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static llvm::Function* build_module_dtor()
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{
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std::string name("_D");
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name.append(gIR->dmodule->mangle());
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name.append("6__dtorZ");
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return build_module_function(name, gIR->dtors);
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}
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// build module unittest
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static llvm::Function* build_module_unittest()
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{
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std::string name("_D");
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name.append(gIR->dmodule->mangle());
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name.append("10__unittestZ");
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return build_module_function(name, gIR->unitTests);
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}
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#if DMDV2
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// build module shared ctor
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llvm::Function* build_module_shared_ctor()
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{
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std::string name("_D");
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name.append(gIR->dmodule->mangle());
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name.append("13__shared_ctorZ");
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return build_module_function(name, gIR->sharedCtors, gIR->sharedGates);
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}
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// build module shared dtor
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static llvm::Function* build_module_shared_dtor()
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{
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std::string name("_D");
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name.append(gIR->dmodule->mangle());
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name.append("13__shared_dtorZ");
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return build_module_function(name, gIR->sharedDtors);
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}
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#endif
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// build ModuleReference and register function, to register the module info in the global linked list
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static LLFunction* build_module_reference_and_ctor(LLConstant* moduleinfo)
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{
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// build ctor type
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LLFunctionType* fty = LLFunctionType::get(LLType::getVoidTy(gIR->context()), std::vector<LLType*>(), false);
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// build ctor name
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std::string fname = "_D";
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fname += gIR->dmodule->mangle();
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fname += "16__moduleinfoCtorZ";
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// build a function that registers the moduleinfo in the global moduleinfo linked list
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LLFunction* ctor = LLFunction::Create(fty, LLGlobalValue::InternalLinkage, fname, gIR->module);
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// provide the default initializer
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LLStructType* modulerefTy = DtoModuleReferenceType();
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std::vector<LLConstant*> mrefvalues;
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mrefvalues.push_back(LLConstant::getNullValue(modulerefTy->getContainedType(0)));
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mrefvalues.push_back(llvm::ConstantExpr::getBitCast(moduleinfo, modulerefTy->getContainedType(1)));
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LLConstant* thismrefinit = LLConstantStruct::get(modulerefTy, mrefvalues);
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// create the ModuleReference node for this module
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std::string thismrefname = "_D";
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thismrefname += gIR->dmodule->mangle();
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thismrefname += "11__moduleRefZ";
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LLGlobalVariable* thismref = new LLGlobalVariable(*gIR->module, modulerefTy, false, LLGlobalValue::InternalLinkage, thismrefinit, thismrefname);
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// make sure _Dmodule_ref is declared
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LLConstant* mref = gIR->module->getNamedGlobal("_Dmodule_ref");
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LLType *modulerefPtrTy = getPtrToType(modulerefTy);
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if (!mref)
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mref = new LLGlobalVariable(*gIR->module, modulerefPtrTy, false, LLGlobalValue::ExternalLinkage, NULL, "_Dmodule_ref");
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mref = DtoBitCast(mref, getPtrToType(modulerefPtrTy));
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// make the function insert this moduleinfo as the beginning of the _Dmodule_ref linked list
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llvm::BasicBlock* bb = llvm::BasicBlock::Create(gIR->context(), "moduleinfoCtorEntry", ctor);
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IRBuilder<> builder(bb);
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// debug info
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DtoDwarfSubProgramInternal(fname.c_str(), fname.c_str());
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// get current beginning
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LLValue* curbeg = builder.CreateLoad(mref, "current");
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// put current beginning as the next of this one
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LLValue* gep = builder.CreateStructGEP(thismref, 0, "next");
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builder.CreateStore(curbeg, gep);
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// replace beginning
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builder.CreateStore(thismref, mref);
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// return
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builder.CreateRetVoid();
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return ctor;
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}
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llvm::Module* Module::genLLVMModule(llvm::LLVMContext& context, Ir* sir)
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{
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bool logenabled = Logger::enabled();
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if (llvmForceLogging && !logenabled)
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{
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Logger::enable();
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}
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Logger::println("Generating module: %s", (md ? md->toChars() : toChars()));
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LOG_SCOPE;
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if (global.params.verbose_cg)
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printf("codegen: %s (%s)\n", toPrettyChars(), srcfile->toChars());
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assert(!global.errors);
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// name the module
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#if 1
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// Temporary workaround for http://llvm.org/bugs/show_bug.cgi?id=11479 –
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// just use the source file name, as it is unlikely to collide with a
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// symbol name used somewhere in the module.
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llvm::StringRef mname(srcfile->toChars());
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#else
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llvm::StringRef mname(toChars());
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if (md != 0)
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mname = md->toChars();
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#endif
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// create a new ir state
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// TODO look at making the instance static and moving most functionality into IrModule where it belongs
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IRState ir(new llvm::Module(mname, context));
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gIR = &ir;
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ir.dmodule = this;
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// reset all IR data stored in Dsymbols
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IrDsymbol::resetAll();
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sir->setState(&ir);
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// set target triple
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ir.module->setTargetTriple(global.params.targetTriple.str());
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// set final data layout
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ir.module->setDataLayout(gDataLayout->getStringRepresentation());
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if (Logger::enabled())
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Logger::cout() << "Final data layout: " << ir.module->getDataLayout() << '\n';
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// allocate the target abi
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gABI = TargetABI::getTarget();
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// debug info
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DtoDwarfCompileUnit(this);
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// handle invalid 'objectø module
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if (!ClassDeclaration::object) {
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error("is missing 'class Object'");
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fatal();
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}
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if (!ClassDeclaration::classinfo) {
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error("is missing 'class ClassInfo'");
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fatal();
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}
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LLVM_D_InitRuntime();
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// process module members
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for (unsigned k=0; k < members->dim; k++) {
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Dsymbol* dsym = static_cast<Dsymbol*>(members->data[k]);
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assert(dsym);
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dsym->codegen(sir);
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}
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// emit function bodies
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sir->emitFunctionBodies();
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// for singleobj-compilation, fully emit all seen template instances
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if (global.params.singleObj)
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{
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while (!ir.seenTemplateInstances.empty())
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{
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IRState::TemplateInstanceSet::iterator it, end = ir.seenTemplateInstances.end();
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for (it = ir.seenTemplateInstances.begin(); it != end; ++it)
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(*it)->codegen(sir);
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ir.seenTemplateInstances.clear();
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// emit any newly added function bodies
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sir->emitFunctionBodies();
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}
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}
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// finilize debug info
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DtoDwarfModuleEnd();
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// generate ModuleInfo
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genmoduleinfo();
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// verify the llvm
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verifyModule(*ir.module);
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gIR = NULL;
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if (llvmForceLogging && !logenabled)
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{
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Logger::disable();
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}
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sir->setState(NULL);
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return ir.module;
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}
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llvm::GlobalVariable* Module::moduleInfoSymbol()
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{
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// create name
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std::string MIname("_D");
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MIname.append(mangle());
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MIname.append("8__ModuleZ");
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if (gIR->dmodule != this) {
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LLType* moduleinfoTy = DtoType(moduleinfo->type);
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LLGlobalVariable *var = gIR->module->getGlobalVariable(MIname);
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if (!var)
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var = new llvm::GlobalVariable(*gIR->module, moduleinfoTy, false, llvm::GlobalValue::ExternalLinkage, NULL, MIname);
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return var;
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}
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if (moduleInfoVar)
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return moduleInfoVar;
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// declare global
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// flags will be modified at runtime so can't make it constant
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moduleInfoVar = new llvm::GlobalVariable(*gIR->module, moduleInfoType, false, llvm::GlobalValue::ExternalLinkage, NULL, MIname);
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return moduleInfoVar;
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}
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// Put out instance of ModuleInfo for this Module
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void Module::genmoduleinfo()
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{
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// resolve ModuleInfo
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if (!moduleinfo)
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{
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error("object.d is missing the ModuleInfo class");
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fatal();
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}
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// check for patch
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else
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{
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#if DMDV2
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unsigned sizeof_ModuleInfo = 16 * PTRSIZE;
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#else
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unsigned sizeof_ModuleInfo = 14 * PTRSIZE;
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#endif
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if (sizeof_ModuleInfo != moduleinfo->structsize)
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{
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error("object.d ModuleInfo class is incorrect");
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fatal();
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}
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}
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// use the RTTIBuilder
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RTTIBuilder b(moduleinfo);
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// some types
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#if MODULEINFO_IS_STRUCT
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LLType* moduleinfoTy = moduleinfo->type->irtype->getLLType();
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#else
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LLType* moduleinfoTy = moduleinfo->type->irtype->isClass()->getMemoryLLType();
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#endif
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LLType* classinfoTy = ClassDeclaration::classinfo->type->irtype->getLLType();
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// importedModules[]
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std::vector<LLConstant*> importInits;
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LLConstant* importedModules = 0;
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llvm::ArrayType* importedModulesTy = 0;
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for (size_t i = 0; i < aimports.dim; i++)
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{
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Module *m = static_cast<Module *>(aimports.data[i]);
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if (!m->needModuleInfo() || m == this)
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continue;
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// declare the imported module info
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std::string m_name("_D");
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m_name.append(m->mangle());
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m_name.append("8__ModuleZ");
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llvm::GlobalVariable* m_gvar = gIR->module->getGlobalVariable(m_name);
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if (!m_gvar) m_gvar = new llvm::GlobalVariable(*gIR->module, moduleinfoTy, false, llvm::GlobalValue::ExternalLinkage, NULL, m_name);
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importInits.push_back(m_gvar);
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}
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// has import array?
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if (!importInits.empty())
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{
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importedModulesTy = llvm::ArrayType::get(getPtrToType(moduleinfoTy), importInits.size());
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importedModules = LLConstantArray::get(importedModulesTy, importInits);
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}
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// localClasses[]
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LLConstant* localClasses = 0;
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llvm::ArrayType* localClassesTy = 0;
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ClassDeclarations aclasses;
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//printf("members->dim = %d\n", members->dim);
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for (size_t i = 0; i < members->dim; i++)
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{
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Dsymbol *member;
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member = static_cast<Dsymbol *>(members->data[i]);
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//printf("\tmember '%s'\n", member->toChars());
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member->addLocalClass(&aclasses);
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}
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// fill inits
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std::vector<LLConstant*> classInits;
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for (size_t i = 0; i < aclasses.dim; i++)
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{
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ClassDeclaration* cd = static_cast<ClassDeclaration*>(aclasses.data[i]);
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cd->codegen(Type::sir);
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if (cd->isInterfaceDeclaration())
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{
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Logger::println("skipping interface '%s' in moduleinfo", cd->toPrettyChars());
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continue;
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}
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else if (cd->sizeok != 1)
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{
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Logger::println("skipping opaque class declaration '%s' in moduleinfo", cd->toPrettyChars());
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continue;
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}
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Logger::println("class: %s", cd->toPrettyChars());
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LLConstant *c = DtoBitCast(cd->ir.irStruct->getClassInfoSymbol(), classinfoTy);
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classInits.push_back(c);
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}
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// has class array?
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if (!classInits.empty())
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{
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localClassesTy = llvm::ArrayType::get(classinfoTy, classInits.size());
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localClasses = LLConstantArray::get(localClassesTy, classInits);
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}
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#if NEW_MODULEINFO_LAYOUT
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// These must match the values in druntime/src/object_.d
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#define MIstandalone 4
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#define MItlsctor 8
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#define MItlsdtor 0x10
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#define MIctor 0x20
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#define MIdtor 0x40
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#define MIxgetMembers 0x80
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#define MIictor 0x100
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#define MIunitTest 0x200
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#define MIimportedModules 0x400
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#define MIlocalClasses 0x800
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#define MInew 0x80000000 // it's the "new" layout
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llvm::Function* fsharedctor = build_module_shared_ctor();
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llvm::Function* fshareddtor = build_module_shared_dtor();
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llvm::Function* funittest = build_module_unittest();
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llvm::Function* fctor = build_module_ctor();
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llvm::Function* fdtor = build_module_dtor();
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unsigned flags = MInew;
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if (fctor)
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flags |= MItlsctor;
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if (fdtor)
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flags |= MItlsdtor;
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if (fsharedctor)
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flags |= MIctor;
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if (fshareddtor)
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flags |= MIdtor;
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#if 0
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if (fgetmembers)
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flags |= MIxgetMembers;
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if (fictor)
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flags |= MIictor;
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#endif
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if (funittest)
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flags |= MIunitTest;
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if (importedModules)
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flags |= MIimportedModules;
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if (localClasses)
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flags |= MIlocalClasses;
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if (!needmoduleinfo)
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flags |= MIstandalone;
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b.push_uint(flags); // flags
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b.push_uint(0); // index
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if (fctor)
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b.push(fctor);
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if (fdtor)
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b.push(fdtor);
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if (fsharedctor)
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b.push(fsharedctor);
|
||
if (fshareddtor)
|
||
b.push(fshareddtor);
|
||
#if 0
|
||
if (fgetmembers)
|
||
b.push(fgetmembers);
|
||
if (fictor)
|
||
b.push(fictor);
|
||
#endif
|
||
if (funittest)
|
||
b.push(funittest);
|
||
if (importedModules) {
|
||
b.push_size(importInits.size());
|
||
b.push(importedModules);
|
||
}
|
||
if (localClasses) {
|
||
b.push_size(classInits.size());
|
||
b.push(localClasses);
|
||
}
|
||
|
||
// Put out module name as a 0-terminated string, to save bytes
|
||
b.push(DtoConstStringPtr(toPrettyChars()));
|
||
|
||
#else
|
||
// The layout is:
|
||
// char[] name;
|
||
// ModuleInfo[] importedModules;
|
||
// ClassInfo[] localClasses;
|
||
// uint flags;
|
||
//
|
||
// void function() ctor;
|
||
// void function() dtor;
|
||
// void function() unitTest;
|
||
//
|
||
// void* xgetMembers;
|
||
// void function() ictor;
|
||
//
|
||
// version(D_Version2) {
|
||
// void *sharedctor;
|
||
// void *shareddtor;
|
||
// uint index;
|
||
// void*[1] reserved;
|
||
// }
|
||
|
||
LLConstant *c = 0;
|
||
|
||
// name
|
||
b.push_string(toPrettyChars());
|
||
|
||
// importedModules
|
||
if (importedModules)
|
||
{
|
||
std::string m_name("_D");
|
||
m_name.append(mangle());
|
||
m_name.append("9__importsZ");
|
||
llvm::GlobalVariable* m_gvar = gIR->module->getGlobalVariable(m_name);
|
||
if (!m_gvar) m_gvar = new llvm::GlobalVariable(*gIR->module, importedModulesTy, true, llvm::GlobalValue::InternalLinkage, importedModules, m_name);
|
||
c = llvm::ConstantExpr::getBitCast(m_gvar, getPtrToType(importedModulesTy->getElementType()));
|
||
c = DtoConstSlice(DtoConstSize_t(importInits.size()), c);
|
||
}
|
||
else
|
||
{
|
||
c = DtoConstSlice(DtoConstSize_t(0), getNullValue(getPtrToType(moduleinfoTy)));
|
||
}
|
||
b.push(c);
|
||
|
||
// localClasses
|
||
if (localClasses)
|
||
{
|
||
std::string m_name("_D");
|
||
m_name.append(mangle());
|
||
m_name.append("9__classesZ");
|
||
assert(gIR->module->getGlobalVariable(m_name) == NULL);
|
||
llvm::GlobalVariable* m_gvar = new llvm::GlobalVariable(*gIR->module, localClassesTy, true, llvm::GlobalValue::InternalLinkage, localClasses, m_name);
|
||
c = DtoGEPi(m_gvar, 0, 0);
|
||
c = DtoConstSlice(DtoConstSize_t(classInits.size()), c);
|
||
}
|
||
else
|
||
{
|
||
c = DtoConstSlice( DtoConstSize_t(0), getNullValue(getPtrToType(getPtrToType(classinfoTy))) );
|
||
}
|
||
b.push(c);
|
||
|
||
// flags (4 means MIstandalone)
|
||
unsigned mi_flags = needmoduleinfo ? 0 : 4;
|
||
b.push_uint(mi_flags);
|
||
|
||
// function pointer type for next three fields
|
||
LLType* fnptrTy = getPtrToType(LLFunctionType::get(LLType::getVoidTy(gIR->context()), std::vector<LLType*>(), false));
|
||
|
||
// ctor
|
||
#if DMDV2
|
||
llvm::Function* fctor = build_module_shared_ctor();
|
||
#else
|
||
llvm::Function* fctor = build_module_ctor();
|
||
#endif
|
||
c = fctor ? fctor : getNullValue(fnptrTy);
|
||
b.push(c);
|
||
|
||
// dtor
|
||
#if DMDV2
|
||
llvm::Function* fdtor = build_module_shared_dtor();
|
||
#else
|
||
llvm::Function* fdtor = build_module_dtor();
|
||
#endif
|
||
c = fdtor ? fdtor : getNullValue(fnptrTy);
|
||
b.push(c);
|
||
|
||
// unitTest
|
||
llvm::Function* unittest = build_module_unittest();
|
||
c = unittest ? unittest : getNullValue(fnptrTy);
|
||
b.push(c);
|
||
|
||
// xgetMembers
|
||
c = getNullValue(getVoidPtrType());
|
||
b.push(c);
|
||
|
||
// ictor
|
||
c = getNullValue(fnptrTy);
|
||
b.push(c);
|
||
|
||
#if DMDV2
|
||
|
||
// tls ctor
|
||
fctor = build_module_ctor();
|
||
c = fctor ? fctor : getNullValue(fnptrTy);
|
||
b.push(c);
|
||
|
||
// tls dtor
|
||
fdtor = build_module_dtor();
|
||
c = fdtor ? fdtor : getNullValue(fnptrTy);
|
||
b.push(c);
|
||
|
||
// index + reserved void*[1]
|
||
LLType* AT = llvm::ArrayType::get(getVoidPtrType(), 2);
|
||
c = getNullValue(AT);
|
||
b.push(c);
|
||
|
||
#endif
|
||
|
||
#endif
|
||
|
||
/*Logger::println("MODULE INFO INITIALIZERS");
|
||
for (size_t i=0; i<initVec.size(); ++i)
|
||
{
|
||
Logger::cout() << *initVec[i] << '\n';
|
||
if (initVec[i]->getType() != moduleinfoTy->getElementType(i))
|
||
assert(0);
|
||
}*/
|
||
|
||
// create and set initializer
|
||
b.finalize(moduleInfoType, moduleInfoSymbol());
|
||
|
||
// build the modulereference and ctor for registering it
|
||
LLFunction* mictor = build_module_reference_and_ctor(moduleInfoSymbol());
|
||
|
||
AppendFunctionToLLVMGlobalCtorsDtors(mictor, 65535, true);
|
||
}
|