mirror of
https://github.com/ldc-developers/ldc.git
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989 lines
34 KiB
C++
989 lines
34 KiB
C++
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// Copyright (c) 1999-2004 by Digital Mars
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// All Rights Reserved
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// written by Walter Bright
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// www.digitalmars.com
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// License for redistribution is by either the Artistic License
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// in artistic.txt, or the GNU General Public License in gnu.txt.
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// See the included readme.txt for details.
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#include <cstddef>
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#include <iostream>
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#include <fstream>
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#include "gen/llvm.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetMachineRegistry.h"
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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/irstate.h"
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#include "gen/elem.h"
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#include "gen/logger.h"
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#include "gen/tollvm.h"
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#include "gen/arrays.h"
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#include "gen/structs.h"
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#include "gen/todebug.h"
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#include "gen/runtime.h"
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//////////////////////////////////////////////////////////////////////////////////////////
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void
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Module::genobjfile()
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{
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Logger::cout() << "Generating module: " << (md ? md->toChars() : toChars()) << '\n';
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LOG_SCOPE;
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// start by deleting the old object file
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deleteObjFile();
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// create a new ir state
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IRState ir;
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gIR = &ir;
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ir.dmodule = this;
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// name the module
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std::string mname(toChars());
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if (md != 0)
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mname = md->toChars();
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ir.module = new llvm::Module(mname);
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// set target stuff
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std::string target_triple(global.params.tt_arch);
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target_triple.append(global.params.tt_os);
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ir.module->setTargetTriple(target_triple);
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ir.module->setDataLayout(global.params.data_layout);
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// heavily inspired by tools/llc/llc.cpp:200-230
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const llvm::TargetMachineRegistry::Entry* targetEntry;
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std::string targetError;
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targetEntry = llvm::TargetMachineRegistry::getClosestStaticTargetForModule(*ir.module, targetError);
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assert(targetEntry && "Failed to find a static target for module");
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std::auto_ptr<llvm::TargetMachine> targetPtr(targetEntry->CtorFn(*ir.module, "")); // TODO: replace "" with features
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assert(targetPtr.get() && "Could not allocate target machine!");
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llvm::TargetMachine &targetMachine = *targetPtr.get();
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gTargetData = targetMachine.getTargetData();
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// debug info
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if (global.params.symdebug) {
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RegisterDwarfSymbols(ir.module);
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ir.dwarfCompileUnit = DtoDwarfCompileUnit(this);
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}
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// process module members
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for (int k=0; k < members->dim; k++) {
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Dsymbol* dsym = (Dsymbol*)(members->data[k]);
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assert(dsym);
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dsym->toObjFile();
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}
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gTargetData = 0;
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// emit the llvm main function if necessary
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if (ir.emitMain) {
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DtoMain();
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}
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// verify the llvm
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if (!global.params.novalidate) {
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std::string verifyErr;
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Logger::println("Verifying module...");
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if (llvm::verifyModule(*ir.module,llvm::ReturnStatusAction,&verifyErr))
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{
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error("%s", verifyErr.c_str());
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fatal();
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}
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else {
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Logger::println("Verification passed!");
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}
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}
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// run passes
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// TODO
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// write bytecode
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{
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Logger::println("Writing LLVM bitcode\n");
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std::ofstream bos(bcfile->name->toChars(), std::ios::binary);
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llvm::WriteBitcodeToFile(ir.module, bos);
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}
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// disassemble ?
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if (global.params.disassemble) {
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Logger::println("Writing LLVM asm to: %s\n", llfile->name->toChars());
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std::ofstream aos(llfile->name->toChars());
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ir.module->print(aos);
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}
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delete ir.module;
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gIR = NULL;
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}
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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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}
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/* ================================================================== */
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void Dsymbol::toObjFile()
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{
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Logger::println("Ignoring Dsymbol::toObjFile for %s", toChars());
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}
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/* ================================================================== */
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void Declaration::toObjFile()
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{
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Logger::println("Ignoring Declaration::toObjFile for %s", toChars());
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}
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/* ================================================================== */
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void InterfaceDeclaration::toObjFile()
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{
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Logger::println("Ignoring InterfaceDeclaration::toObjFile for %s", toChars());
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}
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/* ================================================================== */
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void StructDeclaration::toObjFile()
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{
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TypeStruct* ts = (TypeStruct*)DtoDType(type);
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if (llvmType != 0)
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return;
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static int sdi = 0;
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Logger::print("StructDeclaration::toObjFile(%d): %s\n", sdi++, toChars());
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LOG_SCOPE;
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gIR->structs.push_back(IRStruct(ts));
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for (int k=0; k < members->dim; k++) {
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Dsymbol* dsym = (Dsymbol*)(members->data[k]);
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dsym->toObjFile();
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}
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Logger::println("doing struct fields");
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llvm::StructType* structtype = 0;
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std::vector<llvm::Constant*> fieldinits;
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if (gIR->topstruct().offsets.empty())
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{
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std::vector<const llvm::Type*> fieldtypes;
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Logger::println("has no fields");
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fieldtypes.push_back(llvm::Type::Int8Ty);
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fieldinits.push_back(llvm::ConstantInt::get(llvm::Type::Int8Ty, 0, false));
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structtype = llvm::StructType::get(fieldtypes);
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}
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else
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{
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Logger::println("has fields");
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std::vector<const llvm::Type*> fieldtypes;
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unsigned prevsize = (unsigned)-1;
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unsigned lastoffset = (unsigned)-1;
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const llvm::Type* fieldtype = NULL;
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llvm::Constant* fieldinit = NULL;
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size_t fieldpad = 0;
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int idx = 0;
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for (IRStruct::OffsetMap::iterator i=gIR->topstruct().offsets.begin(); i!=gIR->topstruct().offsets.end(); ++i) {
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// first iteration
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if (lastoffset == (unsigned)-1) {
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lastoffset = i->first;
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assert(lastoffset == 0);
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fieldtype = DtoType(i->second.var->type);
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fieldinit = i->second.init;
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prevsize = gTargetData->getTypeSize(fieldtype);
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i->second.var->llvmFieldIndex = idx;
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}
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// colliding offset?
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else if (lastoffset == i->first) {
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const llvm::Type* t = DtoType(i->second.var->type);
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size_t s = gTargetData->getTypeSize(t);
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if (s > prevsize) {
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fieldpad += s - prevsize;
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prevsize = s;
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}
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llvmHasUnions = true;
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i->second.var->llvmFieldIndex = idx;
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}
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// intersecting offset?
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else if (i->first < (lastoffset + prevsize)) {
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const llvm::Type* t = DtoType(i->second.var->type);
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size_t s = gTargetData->getTypeSize(t);
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assert((i->first + s) <= (lastoffset + prevsize)); // this holds because all types are aligned to their size
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llvmHasUnions = true;
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i->second.var->llvmFieldIndex = idx;
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i->second.var->llvmFieldIndexOffset = (i->first - lastoffset) / s;
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}
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// fresh offset
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else {
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// commit the field
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fieldtypes.push_back(fieldtype);
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fieldinits.push_back(fieldinit);
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if (fieldpad) {
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// match up with below
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std::vector<llvm::Constant*> vals(fieldpad, llvm::ConstantInt::get(llvm::Type::Int8Ty, 0, false));
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llvm::Constant* c = llvm::ConstantArray::get(llvm::ArrayType::get(llvm::Type::Int8Ty, fieldpad), vals);
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fieldtypes.push_back(c->getType());
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fieldinits.push_back(c);
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idx++;
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}
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idx++;
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// start new
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lastoffset = i->first;
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fieldtype = DtoType(i->second.var->type);
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fieldinit = i->second.init;
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prevsize = gTargetData->getTypeSize(fieldtype);
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i->second.var->llvmFieldIndex = idx;
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fieldpad = 0;
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}
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}
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fieldtypes.push_back(fieldtype);
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fieldinits.push_back(fieldinit);
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if (fieldpad) {
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// match up with above
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std::vector<llvm::Constant*> vals(fieldpad, llvm::ConstantInt::get(llvm::Type::Int8Ty, 0, false));
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llvm::Constant* c = llvm::ConstantArray::get(llvm::ArrayType::get(llvm::Type::Int8Ty, fieldpad), vals);
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fieldtypes.push_back(c->getType());
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fieldinits.push_back(c);
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}
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Logger::println("creating struct type");
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structtype = llvm::StructType::get(fieldtypes);
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}
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// refine abstract types for stuff like: struct S{S* next;}
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if (gIR->topstruct().recty != 0)
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{
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llvm::PATypeHolder& pa = gIR->topstruct().recty;
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llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(structtype);
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structtype = llvm::cast<llvm::StructType>(pa.get());
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}
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ts->llvmType = structtype;
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llvmType = structtype;
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if (parent->isModule()) {
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gIR->module->addTypeName(mangle(),ts->llvmType);
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}
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llvmUnion = new DUnion; // uses gIR->topstruct()
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// generate static data
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llvm::GlobalValue::LinkageTypes _linkage = llvm::GlobalValue::ExternalLinkage;
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llvm::Constant* _init = 0;
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// always generate the constant initalizer
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if (!zeroInit) {
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Logger::println("Not zero initialized");
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//assert(tk == gIR->gIR->topstruct()().size());
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#ifndef LLVMD_NO_LOGGER
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Logger::cout() << "struct type: " << *structtype << '\n';
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for (size_t k=0; k<fieldinits.size(); ++k) {
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Logger::cout() << "Type:" << '\n';
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Logger::cout() << *fieldinits[k]->getType() << '\n';
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Logger::cout() << "Value:" << '\n';
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Logger::cout() << *fieldinits[k] << '\n';
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}
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Logger::cout() << "Initializer printed" << '\n';
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#endif
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llvmInitZ = llvm::ConstantStruct::get(structtype,fieldinits);
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}
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else {
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Logger::println("Zero initialized");
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llvmInitZ = llvm::ConstantAggregateZero::get(structtype);
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}
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// only provide the constant initializer for the defining module
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if (getModule() == gIR->dmodule)
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{
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_init = llvmInitZ;
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}
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std::string initname("_D");
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initname.append(mangle());
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initname.append("6__initZ");
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llvm::GlobalVariable* initvar = new llvm::GlobalVariable(ts->llvmType, true, _linkage, _init, initname, gIR->module);
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ts->llvmInit = initvar;
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// generate member function definitions
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gIR->topstruct().queueFuncs = false;
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IRStruct::FuncDeclVector& mfs = gIR->topstruct().funcs;
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size_t n = mfs.size();
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for (size_t i=0; i<n; ++i) {
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mfs[i]->toObjFile();
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}
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llvmDModule = gIR->dmodule;
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gIR->structs.pop_back();
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// generate typeinfo
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if (getModule() == gIR->dmodule && llvmInternal != LLVMnotypeinfo)
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type->getTypeInfo(NULL);
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}
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/* ================================================================== */
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static unsigned LLVM_ClassOffsetToIndex(ClassDeclaration* cd, unsigned os, unsigned& idx)
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{
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// start at the bottom of the inheritance chain
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if (cd->baseClass != 0) {
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unsigned o = LLVM_ClassOffsetToIndex(cd->baseClass, os, idx);
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if (o != (unsigned)-1)
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return o;
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}
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// check this class
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unsigned i;
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for (i=0; i<cd->fields.dim; ++i) {
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VarDeclaration* vd = (VarDeclaration*)cd->fields.data[i];
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if (os == vd->offset)
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return i+idx;
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}
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idx += i;
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return (unsigned)-1;
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}
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void ClassDeclaration::offsetToIndex(Type* t, unsigned os, std::vector<unsigned>& result)
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{
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unsigned idx = 0;
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unsigned r = LLVM_ClassOffsetToIndex(this, os, idx);
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assert(r != (unsigned)-1 && "Offset not found in any aggregate field");
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result.push_back(r+1); // vtable is 0
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}
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/* ================================================================== */
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static void LLVM_AddBaseClassData(BaseClasses* bcs)
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{
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// add base class data members first
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for (int j=0; j<bcs->dim; j++)
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{
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BaseClass* bc = (BaseClass*)(bcs->data[j]);
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assert(bc);
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Logger::println("Adding base class members of %s", bc->base->toChars());
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LOG_SCOPE;
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LLVM_AddBaseClassData(&bc->base->baseclasses);
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for (int k=0; k < bc->base->members->dim; k++) {
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Dsymbol* dsym = (Dsymbol*)(bc->base->members->data[k]);
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if (dsym->isVarDeclaration())
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{
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dsym->toObjFile();
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}
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}
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}
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}
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void ClassDeclaration::toObjFile()
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{
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TypeClass* ts = (TypeClass*)DtoDType(type);
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if (ts->llvmType != 0 || llvmInProgress)
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return;
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llvmInProgress = true;
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static int fdi = 0;
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Logger::print("ClassDeclaration::toObjFile(%d): %s\n", fdi++, toChars());
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LOG_SCOPE;
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gIR->structs.push_back(IRStruct(ts));
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gIR->classes.push_back(this);
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// add vtable
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llvm::PATypeHolder pa = llvm::OpaqueType::get();
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const llvm::Type* vtabty = llvm::PointerType::get(pa);
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std::vector<const llvm::Type*> fieldtypes;
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fieldtypes.push_back(vtabty);
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std::vector<llvm::Constant*> fieldinits;
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fieldinits.push_back(0);
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// base classes first
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LLVM_AddBaseClassData(&baseclasses);
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// then add own members
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for (int k=0; k < members->dim; k++) {
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Dsymbol* dsym = (Dsymbol*)(members->data[k]);
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dsym->toObjFile();
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}
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// fill out fieldtypes/inits
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for (IRStruct::OffsetMap::iterator i=gIR->topstruct().offsets.begin(); i!=gIR->topstruct().offsets.end(); ++i) {
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fieldtypes.push_back(DtoType(i->second.var->type));
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fieldinits.push_back(i->second.init);
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}
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llvm::StructType* structtype = llvm::StructType::get(fieldtypes);
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// refine abstract types for stuff like: class C {C next;}
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if (gIR->topstruct().recty != 0)
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{
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llvm::PATypeHolder& pa = gIR->topstruct().recty;
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llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(structtype);
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structtype = llvm::cast<llvm::StructType>(pa.get());
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}
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ts->llvmType = structtype;
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llvmType = structtype;
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bool needs_definition = false;
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if (parent->isModule()) {
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gIR->module->addTypeName(mangle(),ts->llvmType);
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needs_definition = (getModule() == gIR->dmodule);
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}
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else {
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assert(0 && "class parent is not a module");
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}
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// generate vtable
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llvm::GlobalVariable* svtblVar = 0;
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std::vector<llvm::Constant*> sinits;
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std::vector<const llvm::Type*> sinits_ty;
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sinits.reserve(vtbl.dim);
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sinits_ty.reserve(vtbl.dim);
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for (int k=0; k < vtbl.dim; k++)
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{
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Dsymbol* dsym = (Dsymbol*)vtbl.data[k];
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assert(dsym);
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//Logger::cout() << "vtblsym: " << dsym->toChars() << '\n';
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if (FuncDeclaration* fd = dsym->isFuncDeclaration()) {
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fd->toObjFile();
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assert(fd->llvmValue);
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llvm::Constant* c = llvm::cast<llvm::Constant>(fd->llvmValue);
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sinits.push_back(c);
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sinits_ty.push_back(c->getType());
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}
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else if (ClassDeclaration* cd = dsym->isClassDeclaration()) {
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const llvm::Type* cty = llvm::PointerType::get(llvm::Type::Int8Ty);
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llvm::Constant* c = llvm::Constant::getNullValue(cty);
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sinits.push_back(c);
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sinits_ty.push_back(cty);
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}
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else
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assert(0);
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}
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const llvm::StructType* svtbl_ty = 0;
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if (!sinits.empty())
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{
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llvm::GlobalValue::LinkageTypes _linkage = llvm::GlobalValue::ExternalLinkage;
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std::string varname("_D");
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varname.append(mangle());
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varname.append("6__vtblZ");
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std::string styname(mangle());
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styname.append("__vtblTy");
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svtbl_ty = llvm::StructType::get(sinits_ty);
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gIR->module->addTypeName(styname, svtbl_ty);
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svtblVar = new llvm::GlobalVariable(svtbl_ty, true, _linkage, 0, varname, gIR->module);
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llvmConstVtbl = llvm::cast<llvm::ConstantStruct>(llvm::ConstantStruct::get(svtbl_ty, sinits));
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if (needs_definition)
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svtblVar->setInitializer(llvmConstVtbl);
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llvmVtbl = svtblVar;
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}
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////////////////////////////////////////////////////////////////////////////////
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// refine for final vtable type
|
|
llvm::cast<llvm::OpaqueType>(pa.get())->refineAbstractTypeTo(svtbl_ty);
|
|
svtbl_ty = llvm::cast<llvm::StructType>(pa.get());
|
|
structtype = llvm::cast<llvm::StructType>(gIR->topstruct().recty.get());
|
|
ts->llvmType = structtype;
|
|
llvmType = structtype;
|
|
|
|
// generate initializer
|
|
llvm::GlobalValue::LinkageTypes _linkage = llvm::GlobalValue::ExternalLinkage;
|
|
llvm::Constant* _init = 0;
|
|
|
|
// first field is always the vtable
|
|
assert(svtblVar != 0);
|
|
fieldinits[0] = svtblVar;
|
|
|
|
llvmInitZ = _init = llvm::ConstantStruct::get(structtype,fieldinits);
|
|
assert(_init);
|
|
|
|
std::string initname("_D");
|
|
initname.append(mangle());
|
|
initname.append("6__initZ");
|
|
//Logger::cout() << *_init << '\n';
|
|
llvm::GlobalVariable* initvar = new llvm::GlobalVariable(ts->llvmType, true, _linkage, NULL, initname, gIR->module);
|
|
ts->llvmInit = initvar;
|
|
|
|
if (needs_definition) {
|
|
initvar->setInitializer(_init);
|
|
// generate member functions
|
|
gIR->topstruct().queueFuncs = false;
|
|
IRStruct::FuncDeclVector& mfs = gIR->topstruct().funcs;
|
|
size_t n = mfs.size();
|
|
for (size_t i=0; i<n; ++i) {
|
|
mfs[i]->toObjFile();
|
|
}
|
|
}
|
|
|
|
gIR->classes.pop_back();
|
|
gIR->structs.pop_back();
|
|
|
|
llvmInProgress = false;
|
|
}
|
|
|
|
/******************************************
|
|
* Get offset of base class's vtbl[] initializer from start of csym.
|
|
* Returns ~0 if not this csym.
|
|
*/
|
|
|
|
unsigned ClassDeclaration::baseVtblOffset(BaseClass *bc)
|
|
{
|
|
return ~0;
|
|
}
|
|
|
|
/* ================================================================== */
|
|
|
|
void VarDeclaration::toObjFile()
|
|
{
|
|
Logger::print("VarDeclaration::toObjFile(): %s | %s\n", toChars(), type->toChars());
|
|
LOG_SCOPE;
|
|
llvm::Module* M = gIR->module;
|
|
|
|
if (aliassym)
|
|
{
|
|
Logger::println("alias sym");
|
|
toAlias()->toObjFile();
|
|
return;
|
|
}
|
|
|
|
// global variable or magic
|
|
if (isDataseg())
|
|
{
|
|
if (llvmTouched) return;
|
|
else llvmTouched = true;
|
|
|
|
bool _isconst = false;
|
|
if (isConst() && (init && !init->isExpInitializer()))
|
|
_isconst = true;
|
|
|
|
llvm::GlobalValue::LinkageTypes _linkage;
|
|
bool istempl = false;
|
|
if ((storage_class & STCcomdat) || (parent && DtoIsTemplateInstance(parent))) {
|
|
_linkage = llvm::GlobalValue::WeakLinkage;
|
|
istempl = true;
|
|
}
|
|
else if (parent && parent->isFuncDeclaration())
|
|
_linkage = llvm::GlobalValue::InternalLinkage;
|
|
else
|
|
_linkage = DtoLinkage(protection, storage_class);
|
|
|
|
Type* t = DtoDType(type);
|
|
|
|
const llvm::Type* _type = DtoType(t);
|
|
assert(_type);
|
|
|
|
llvm::Constant* _init = 0;
|
|
bool _signed = !type->isunsigned();
|
|
|
|
Logger::println("Creating global variable");
|
|
std::string _name(mangle());
|
|
|
|
bool emitRTstaticInit = false;
|
|
|
|
if (!(storage_class & STCextern) && (getModule() == gIR->dmodule || istempl))
|
|
{
|
|
if (parent && parent->isFuncDeclaration() && init && init->isExpInitializer()) {
|
|
_init = DtoConstInitializer(t, NULL);
|
|
emitRTstaticInit = true;
|
|
}
|
|
else {
|
|
_init = DtoConstInitializer(t, init);
|
|
}
|
|
|
|
//Logger::cout() << "initializer: " << *_init << '\n';
|
|
if (_type != _init->getType()) {
|
|
Logger::cout() << "got type '" << *_init->getType() << "' expected '" << *_type << "'\n";
|
|
// zero initalizer
|
|
if (_init->isNullValue())
|
|
_init = llvm::Constant::getNullValue(_type);
|
|
// pointer to global constant (struct.init)
|
|
else if (llvm::isa<llvm::GlobalVariable>(_init))
|
|
{
|
|
assert(_init->getType()->getContainedType(0) == _type);
|
|
llvm::GlobalVariable* gv = llvm::cast<llvm::GlobalVariable>(_init);
|
|
assert(t->ty == Tstruct);
|
|
TypeStruct* ts = (TypeStruct*)t;
|
|
assert(ts->sym->llvmInitZ);
|
|
_init = ts->sym->llvmInitZ;
|
|
}
|
|
// array single value init
|
|
else if (llvm::isa<llvm::ArrayType>(_type))
|
|
{
|
|
_init = DtoConstStaticArray(_type, _init);
|
|
}
|
|
else {
|
|
Logger::cout() << "Unexpected initializer type: " << *_type << '\n';
|
|
//assert(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (_init && _init->getType() != _type)
|
|
_type = _init->getType();
|
|
llvm::GlobalVariable* gvar = new llvm::GlobalVariable(_type,_isconst,_linkage,_init,_name,M);
|
|
llvmValue = gvar;
|
|
|
|
if (emitRTstaticInit)
|
|
DtoLazyStaticInit(istempl, gvar, init, t);
|
|
|
|
llvmDModule = gIR->dmodule;
|
|
|
|
//if (storage_class & STCprivate)
|
|
// gvar->setVisibility(llvm::GlobalValue::ProtectedVisibility);
|
|
}
|
|
|
|
// inside aggregate declaration. declare a field.
|
|
else
|
|
{
|
|
Logger::println("Aggregate var declaration: '%s' offset=%d", toChars(), offset);
|
|
|
|
Type* t = DtoDType(type);
|
|
const llvm::Type* _type = DtoType(t);
|
|
|
|
llvm::Constant*_init = DtoConstInitializer(t, init);
|
|
assert(_init);
|
|
Logger::cout() << "field init is: " << *_init << " type should be " << *_type << '\n';
|
|
if (_type != _init->getType())
|
|
{
|
|
if (t->ty == Tsarray)
|
|
{
|
|
const llvm::ArrayType* arrty = llvm::cast<llvm::ArrayType>(_type);
|
|
uint64_t n = arrty->getNumElements();
|
|
std::vector<llvm::Constant*> vals(n,_init);
|
|
_init = llvm::ConstantArray::get(arrty, vals);
|
|
}
|
|
else if (t->ty == Tarray)
|
|
{
|
|
assert(llvm::isa<llvm::StructType>(_type));
|
|
_init = llvm::ConstantAggregateZero::get(_type);
|
|
}
|
|
else if (t->ty == Tstruct)
|
|
{
|
|
const llvm::StructType* structty = llvm::cast<llvm::StructType>(_type);
|
|
TypeStruct* ts = (TypeStruct*)t;
|
|
assert(ts);
|
|
assert(ts->sym);
|
|
assert(ts->sym->llvmInitZ);
|
|
_init = ts->sym->llvmInitZ;
|
|
}
|
|
else if (t->ty == Tclass)
|
|
{
|
|
_init = llvm::Constant::getNullValue(_type);
|
|
}
|
|
else {
|
|
Logger::println("failed for type %s", type->toChars());
|
|
assert(0);
|
|
}
|
|
}
|
|
|
|
// add the field in the IRStruct
|
|
gIR->topstruct().offsets.insert(std::make_pair(offset, IRStruct::Offset(this,_init)));
|
|
}
|
|
|
|
Logger::println("VarDeclaration::toObjFile is done");
|
|
}
|
|
|
|
/* ================================================================== */
|
|
|
|
void TypedefDeclaration::toObjFile()
|
|
{
|
|
static int tdi = 0;
|
|
Logger::print("TypedefDeclaration::toObjFile(%d): %s\n", tdi++, toChars());
|
|
LOG_SCOPE;
|
|
|
|
// generate typeinfo
|
|
type->getTypeInfo(NULL);
|
|
}
|
|
|
|
/* ================================================================== */
|
|
|
|
void EnumDeclaration::toObjFile()
|
|
{
|
|
Logger::println("Ignoring EnumDeclaration::toObjFile for %s", toChars());
|
|
}
|
|
|
|
/* ================================================================== */
|
|
|
|
void FuncDeclaration::toObjFile()
|
|
{
|
|
if (llvmDModule) {
|
|
assert(llvmValue != 0);
|
|
return;
|
|
}
|
|
|
|
if (llvmRunTimeHack) {
|
|
Logger::println("runtime hack func chars: %s", toChars());
|
|
if (!llvmValue)
|
|
llvmValue = LLVM_D_GetRuntimeFunction(gIR->module, toChars());
|
|
return;
|
|
}
|
|
|
|
if (isUnitTestDeclaration()) {
|
|
Logger::println("*** ATTENTION: ignoring unittest declaration: %s", toChars());
|
|
return;
|
|
}
|
|
|
|
Type* t = DtoDType(type);
|
|
TypeFunction* f = (TypeFunction*)t;
|
|
|
|
bool declareOnly = false;
|
|
if (parent)
|
|
{
|
|
if (TemplateInstance* tinst = parent->isTemplateInstance()) {
|
|
TemplateDeclaration* tempdecl = tinst->tempdecl;
|
|
if (tempdecl->llvmInternal == LLVMva_start)
|
|
{
|
|
Logger::println("magic va_start found");
|
|
llvmInternal = LLVMva_start;
|
|
declareOnly = true;
|
|
}
|
|
else if (tempdecl->llvmInternal == LLVMva_arg)
|
|
{
|
|
Logger::println("magic va_arg found");
|
|
llvmInternal = LLVMva_arg;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
llvm::Function* func = DtoDeclareFunction(this);
|
|
|
|
if (declareOnly)
|
|
return;
|
|
|
|
if (!gIR->structs.empty() && gIR->topstruct().queueFuncs) {
|
|
if (!llvmQueued) {
|
|
Logger::println("queueing %s", toChars());
|
|
gIR->topstruct().funcs.push_back(this);
|
|
llvmQueued = true;
|
|
}
|
|
return; // we wait with the definition as they might invoke a virtual method and the vtable is not yet complete
|
|
}
|
|
|
|
// debug info
|
|
if (global.params.symdebug) {
|
|
llvmDwarfSubProgram = DtoDwarfSubProgram(this);
|
|
}
|
|
|
|
assert(f->llvmType);
|
|
const llvm::FunctionType* functype = llvm::cast<llvm::FunctionType>(llvmValue->getType()->getContainedType(0));
|
|
|
|
// template instances should have weak linkage
|
|
if (parent && DtoIsTemplateInstance(parent)) {
|
|
func->setLinkage(llvm::GlobalValue::WeakLinkage);
|
|
}
|
|
|
|
// only members of the current module maybe be defined
|
|
if (getModule() == gIR->dmodule || DtoIsTemplateInstance(parent))
|
|
{
|
|
llvmDModule = gIR->dmodule;
|
|
|
|
// handle static constructor / destructor
|
|
if (isStaticCtorDeclaration() || isStaticDtorDeclaration()) {
|
|
const llvm::ArrayType* sctor_type = llvm::ArrayType::get(llvm::PointerType::get(functype),1);
|
|
//Logger::cout() << "static ctor type: " << *sctor_type << '\n';
|
|
|
|
llvm::Constant* sctor_func = llvm::cast<llvm::Constant>(llvmValue);
|
|
//Logger::cout() << "static ctor func: " << *sctor_func << '\n';
|
|
|
|
llvm::Constant* sctor_init = llvm::ConstantArray::get(sctor_type,&sctor_func,1);
|
|
|
|
//Logger::cout() << "static ctor init: " << *sctor_init << '\n';
|
|
|
|
// output the llvm.global_ctors array
|
|
const char* varname = isStaticCtorDeclaration() ? "_d_module_ctor_array" : "_d_module_dtor_array";
|
|
llvm::GlobalVariable* sctor_arr = new llvm::GlobalVariable(sctor_type, false, llvm::GlobalValue::AppendingLinkage, sctor_init, varname, gIR->module);
|
|
}
|
|
|
|
// function definition
|
|
if (fbody != 0)
|
|
{
|
|
gIR->functions.push_back(IRFunction(this));
|
|
gIR->func().func = func;
|
|
|
|
// first make absolutely sure the type is up to date
|
|
f->llvmType = llvmValue->getType()->getContainedType(0);
|
|
|
|
//Logger::cout() << "func type: " << *f->llvmType << '\n';
|
|
|
|
// this handling
|
|
if (f->llvmUsesThis) {
|
|
Logger::println("uses this");
|
|
if (f->llvmRetInPtr)
|
|
llvmThisVar = ++func->arg_begin();
|
|
else
|
|
llvmThisVar = func->arg_begin();
|
|
assert(llvmThisVar != 0);
|
|
}
|
|
|
|
if (isMain())
|
|
gIR->emitMain = true;
|
|
|
|
llvm::BasicBlock* beginbb = new llvm::BasicBlock("entry",func);
|
|
llvm::BasicBlock* endbb = new llvm::BasicBlock("endentry",func);
|
|
|
|
//assert(gIR->scopes.empty());
|
|
gIR->scopes.push_back(IRScope(beginbb, endbb));
|
|
|
|
// create alloca point
|
|
f->llvmAllocaPoint = new llvm::BitCastInst(llvm::ConstantInt::get(llvm::Type::Int32Ty,0,false),llvm::Type::Int32Ty,"alloca point",gIR->scopebb());
|
|
gIR->func().allocapoint = f->llvmAllocaPoint;
|
|
|
|
// give arguments storage
|
|
size_t n = Argument::dim(f->parameters);
|
|
for (int i=0; i < n; ++i) {
|
|
Argument* arg = Argument::getNth(f->parameters, i);
|
|
if (arg && arg->vardecl) {
|
|
VarDeclaration* vd = arg->vardecl;
|
|
if (!vd->llvmNeedsStorage || vd->nestedref || vd->isRef() || vd->isOut() || DtoIsPassedByRef(vd->type))
|
|
continue;
|
|
llvm::Value* a = vd->llvmValue;
|
|
assert(a);
|
|
std::string s(a->getName());
|
|
Logger::println("giving argument '%s' storage", s.c_str());
|
|
s.append("_storage");
|
|
llvm::Value* v = new llvm::AllocaInst(a->getType(),s,f->llvmAllocaPoint);
|
|
gIR->ir->CreateStore(a,v);
|
|
vd->llvmValue = v;
|
|
}
|
|
else {
|
|
Logger::println("*** ATTENTION: some unknown argument: %s", arg ? arg->toChars() : 0);
|
|
}
|
|
}
|
|
|
|
// debug info
|
|
if (global.params.symdebug) DtoDwarfFuncStart(this);
|
|
|
|
llvm::Value* parentNested = NULL;
|
|
if (FuncDeclaration* fd = toParent()->isFuncDeclaration()) {
|
|
parentNested = fd->llvmNested;
|
|
}
|
|
|
|
// construct nested variables struct
|
|
if (!llvmNestedVars.empty() || parentNested) {
|
|
std::vector<const llvm::Type*> nestTypes;
|
|
int j = 0;
|
|
if (parentNested) {
|
|
nestTypes.push_back(parentNested->getType());
|
|
j++;
|
|
}
|
|
for (std::set<VarDeclaration*>::iterator i=llvmNestedVars.begin(); i!=llvmNestedVars.end(); ++i) {
|
|
VarDeclaration* vd = *i;
|
|
vd->llvmNestedIndex = j++;
|
|
if (vd->isParameter()) {
|
|
assert(vd->llvmValue);
|
|
nestTypes.push_back(vd->llvmValue->getType());
|
|
}
|
|
else {
|
|
nestTypes.push_back(DtoType(vd->type));
|
|
}
|
|
}
|
|
const llvm::StructType* nestSType = llvm::StructType::get(nestTypes);
|
|
Logger::cout() << "nested var struct has type:" << '\n' << *nestSType;
|
|
llvmNested = new llvm::AllocaInst(nestSType,"nestedvars",f->llvmAllocaPoint);
|
|
if (parentNested) {
|
|
assert(llvmThisVar);
|
|
llvm::Value* ptr = gIR->ir->CreateBitCast(llvmThisVar, parentNested->getType(), "tmp");
|
|
gIR->ir->CreateStore(ptr, DtoGEPi(llvmNested, 0,0, "tmp"));
|
|
}
|
|
for (std::set<VarDeclaration*>::iterator i=llvmNestedVars.begin(); i!=llvmNestedVars.end(); ++i) {
|
|
VarDeclaration* vd = *i;
|
|
if (vd->isParameter()) {
|
|
gIR->ir->CreateStore(vd->llvmValue, DtoGEPi(llvmNested, 0, vd->llvmNestedIndex, "tmp"));
|
|
vd->llvmValue = llvmNested;
|
|
}
|
|
}
|
|
}
|
|
|
|
// copy _argptr to a memory location
|
|
if (f->linkage == LINKd && f->varargs == 1)
|
|
{
|
|
llvm::Value* argptrmem = new llvm::AllocaInst(llvmArgPtr->getType(), "_argptrmem", gIR->topallocapoint());
|
|
new llvm::StoreInst(llvmArgPtr, argptrmem, gIR->scopebb());
|
|
llvmArgPtr = argptrmem;
|
|
}
|
|
|
|
// output function body
|
|
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 (!isMain()) {
|
|
if (!gIR->scopereturned()) {
|
|
// pass the previous block into this block
|
|
if (global.params.symdebug) DtoDwarfFuncEnd(this);
|
|
if (func->getReturnType() == llvm::Type::VoidTy) {
|
|
new llvm::ReturnInst(gIR->scopebb());
|
|
}
|
|
else {
|
|
new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), gIR->scopebb());
|
|
}
|
|
}
|
|
}
|
|
|
|
// erase alloca point
|
|
f->llvmAllocaPoint->eraseFromParent();
|
|
f->llvmAllocaPoint = 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()) {
|
|
if (lastbb->getNumUses() == 0)
|
|
lastbb->eraseFromParent();
|
|
else {
|
|
new llvm::UnreachableInst(lastbb);
|
|
/*if (func->getReturnType() == llvm::Type::VoidTy) {
|
|
new llvm::ReturnInst(lastbb);
|
|
}
|
|
else {
|
|
new llvm::ReturnInst(llvm::UndefValue::get(func->getReturnType()), lastbb);
|
|
}*/
|
|
}
|
|
}
|
|
|
|
gIR->functions.pop_back();
|
|
}
|
|
}
|
|
}
|