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https://github.com/ldc-developers/ldc.git
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1242be25d0
The codegen parameter was changed to IRState instead of removing it to set the stage for an eventual eradication of the gIR global.
398 lines
11 KiB
C++
398 lines
11 KiB
C++
//===-- declarations.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 "aggregate.h"
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#include "declaration.h"
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#include "enum.h"
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#include "id.h"
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#include "init.h"
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#include "rmem.h"
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#include "template.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/llvm.h"
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#include "gen/llvmhelpers.h"
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#include "gen/logger.h"
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#include "gen/tollvm.h"
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#include "gen/utils.h"
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#include "ir/irtype.h"
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#include "ir/irvar.h"
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/* ================================================================== */
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void Dsymbol::codegen(IRState *)
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{
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IF_LOG Logger::println("Ignoring Dsymbol::codegen for %s", toPrettyChars());
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}
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/* ================================================================== */
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void InterfaceDeclaration::codegen(IRState *p)
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{
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IF_LOG Logger::println("InterfaceDeclaration::codegen: '%s'", toPrettyChars());
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LOG_SCOPE
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if (ir.defined) return;
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ir.defined = true;
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if (type->ty == Terror)
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{ error("had semantic errors when compiling");
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return;
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}
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if (members && symtab)
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{
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DtoResolveClass(this);
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// Emit any members (e.g. final functions).
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for (ArrayIter<Dsymbol> it(members); !it.done(); it.next())
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{
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it->codegen(p);
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}
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// Emit TypeInfo.
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DtoTypeInfoOf(type);
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// Define __InterfaceZ.
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llvm::GlobalVariable *interfaceZ = ir.irAggr->getClassInfoSymbol();
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interfaceZ->setInitializer(ir.irAggr->getClassInfoInit());
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interfaceZ->setLinkage(DtoExternalLinkage(this));
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}
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}
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/* ================================================================== */
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void StructDeclaration::codegen(IRState *p)
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{
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IF_LOG Logger::println("StructDeclaration::codegen: '%s'", toPrettyChars());
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LOG_SCOPE
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if (ir.defined) return;
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ir.defined = true;
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if (type->ty == Terror)
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{ error("had semantic errors when compiling");
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return;
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}
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if (members && symtab)
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{
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DtoResolveStruct(this);
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for (ArrayIter<Dsymbol> it(members); !it.done(); it.next())
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{
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it->codegen(p);
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}
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// Define the __initZ symbol.
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llvm::GlobalVariable *initZ = ir.irAggr->getInitSymbol();
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initZ->setInitializer(ir.irAggr->getDefaultInit());
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initZ->setLinkage(DtoExternalLinkage(this));
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// emit typeinfo
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DtoTypeInfoOf(type);
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}
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}
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/* ================================================================== */
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void ClassDeclaration::codegen(IRState *p)
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{
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IF_LOG Logger::println("ClassDeclaration::codegen: '%s'", toPrettyChars());
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LOG_SCOPE
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if (ir.defined) return;
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ir.defined = true;
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if (type->ty == Terror)
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{ error("had semantic errors when compiling");
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return;
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}
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if (members && symtab)
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{
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DtoResolveClass(this);
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for (ArrayIter<Dsymbol> it(members); !it.done(); it.next())
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{
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it->codegen(p);
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}
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llvm::GlobalValue::LinkageTypes const linkage = DtoExternalLinkage(this);
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llvm::GlobalVariable *initZ = ir.irAggr->getInitSymbol();
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initZ->setInitializer(ir.irAggr->getDefaultInit());
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initZ->setLinkage(linkage);
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llvm::GlobalVariable *vtbl = ir.irAggr->getVtblSymbol();
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vtbl->setInitializer(ir.irAggr->getVtblInit());
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vtbl->setLinkage(linkage);
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llvm::GlobalVariable *classZ = ir.irAggr->getClassInfoSymbol();
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classZ->setInitializer(ir.irAggr->getClassInfoInit());
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classZ->setLinkage(linkage);
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// No need to do TypeInfo here, it is <name>__classZ for classes in D2.
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}
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}
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/* ================================================================== */
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void TupleDeclaration::codegen(IRState *p)
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{
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IF_LOG Logger::println("TupleDeclaration::codegen(): '%s'", toPrettyChars());
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LOG_SCOPE
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if (ir.defined) return;
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ir.defined = true;
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assert(isexp);
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assert(objects);
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int n = objects->dim;
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for (int i=0; i < n; ++i)
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{
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DsymbolExp* exp = static_cast<DsymbolExp*>(objects->data[i]);
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assert(exp->op == TOKdsymbol);
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exp->s->codegen(p);
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}
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}
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/* ================================================================== */
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void VarDeclaration::codegen(IRState *p)
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{
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IF_LOG Logger::println("VarDeclaration::codegen(): '%s'", toPrettyChars());
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LOG_SCOPE;
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if (ir.defined) return;
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ir.defined = true;
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if (type->ty == Terror)
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{ error("had semantic errors when compiling");
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return;
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}
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DtoResolveVariable(this);
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// just forward aliases
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if (aliassym)
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{
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Logger::println("alias sym");
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toAlias()->codegen(p);
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return;
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}
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// global variable
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if (isDataseg() || (storage_class & (STCconst | STCimmutable) && init))
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{
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Logger::println("data segment");
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#if 0 // TODO:
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assert(!(storage_class & STCmanifest) &&
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"manifest constant being codegen'd!");
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#endif
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llvm::GlobalVariable *gvar = llvm::cast<llvm::GlobalVariable>(
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this->ir.irGlobal->value);
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assert(gvar && "DtoResolveVariable should have created value");
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const llvm::GlobalValue::LinkageTypes llLinkage = DtoLinkage(this);
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// Check if we are defining or just declaring the global in this module.
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if (!(storage_class & STCextern))
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{
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// Build the initializer. Might use this->ir.irGlobal->value!
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LLConstant *initVal = DtoConstInitializer(loc, type, init);
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// In case of type mismatch, swap out the variable.
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if (initVal->getType() != gvar->getType()->getElementType())
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{
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llvm::GlobalVariable* newGvar = getOrCreateGlobal(loc,
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*gIR->module, initVal->getType(), gvar->isConstant(),
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llLinkage, 0,
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"", // We take on the name of the old global below.
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gvar->isThreadLocal());
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newGvar->setAlignment(gvar->getAlignment());
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newGvar->takeName(gvar);
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llvm::Constant* newValue =
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llvm::ConstantExpr::getBitCast(newGvar, gvar->getType());
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gvar->replaceAllUsesWith(newValue);
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gvar->eraseFromParent();
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gvar = newGvar;
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this->ir.irGlobal->value = newGvar;
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}
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// Now, set the initializer.
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assert(!ir.irGlobal->constInit);
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ir.irGlobal->constInit = initVal;
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gvar->setInitializer(initVal);
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gvar->setLinkage(llLinkage);
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// Also set up the edbug info.
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gIR->DBuilder.EmitGlobalVariable(gvar, this);
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}
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// If this global is used from a naked function, we need to create an
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// artificial "use" for it, or it could be removed by the optimizer if
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// the only reference to it is in inline asm.
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if (nakedUse)
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gIR->usedArray.push_back(DtoBitCast(gvar, getVoidPtrType()));
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if (Logger::enabled())
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Logger::cout() << *gvar << '\n';
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}
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}
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/* ================================================================== */
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void TypedefDeclaration::codegen(IRState *)
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{
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IF_LOG Logger::println("TypedefDeclaration::codegen: '%s'", toPrettyChars());
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LOG_SCOPE;
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if (ir.defined) return;
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ir.defined = true;
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if (type->ty == Terror)
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{ error("had semantic errors when compiling");
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return;
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}
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// generate typeinfo
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DtoTypeInfoOf(type, false);
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}
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/* ================================================================== */
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void EnumDeclaration::codegen(IRState *)
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{
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IF_LOG Logger::println("Ignoring EnumDeclaration::codegen: '%s'", toPrettyChars());
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if (type->ty == Terror)
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{ error("had semantic errors when compiling");
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return;
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}
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}
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/* ================================================================== */
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void FuncDeclaration::codegen(IRState *p)
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{
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// don't touch function aliases, they don't contribute any new symbols
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if (!isFuncAliasDeclaration())
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{
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DtoDefineFunction(this);
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}
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}
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/* ================================================================== */
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void TemplateInstance::codegen(IRState *p)
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{
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IF_LOG Logger::println("TemplateInstance::codegen: '%s'", toPrettyChars());
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LOG_SCOPE
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if (ir.defined) return;
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ir.defined = true;
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if (!errors && members)
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{
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for (unsigned i = 0; i < members->dim; i++)
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{
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(*members)[i]->codegen(p);
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}
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}
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}
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/* ================================================================== */
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void TemplateMixin::codegen(IRState *p)
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{
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IF_LOG Logger::println("TemplateInstance::codegen: '%s'", toPrettyChars());
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LOG_SCOPE
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if (ir.defined) return;
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ir.defined = true;
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if (!errors && members)
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{
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for (unsigned i = 0; i < members->dim; i++)
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{
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(*members)[i]->codegen(p);
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}
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}
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}
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/* ================================================================== */
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void AttribDeclaration::codegen(IRState *p)
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{
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Array *d = include(NULL, NULL);
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if (d)
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{
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for (unsigned i = 0; i < d->dim; i++)
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{ Dsymbol *s = static_cast<Dsymbol *>(d->data[i]);
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s->codegen(p);
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}
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}
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}
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/* ================================================================== */
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void PragmaDeclaration::codegen(IRState *p)
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{
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if (ident == Id::lib)
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{
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assert(args && args->dim == 1);
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Expression *e = static_cast<Expression *>(args->data[0]);
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assert(e->op == TOKstring);
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StringExp *se = static_cast<StringExp *>(e);
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size_t nameLen = se->len;
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if (global.params.targetTriple.getOS() == llvm::Triple::MinGW32)
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{
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if (nameLen > 4 &&
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!memcmp(static_cast<char*>(se->string) + nameLen - 4, ".lib", 4))
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{
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// On MinGW, strip the .lib suffix, if any, to improve
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// compatibility with code written for DMD (we pass the name to GCC
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// via -l, just as on Posix).
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nameLen -= 4;
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}
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if (nameLen >= 7 && !memcmp(se->string, "shell32", 7))
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{
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// Another DMD compatibility kludge: Ignore
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// pragma(lib, "shell32.lib"), it is implicitly provided by
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// MinGW.
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return;
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}
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}
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size_t const n = nameLen + 3;
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char *arg = static_cast<char *>(mem.malloc(n));
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arg[0] = '-';
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arg[1] = 'l';
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memcpy(arg + 2, se->string, nameLen);
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arg[n-1] = 0;
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global.params.linkswitches->push(arg);
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}
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AttribDeclaration::codegen(p);
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}
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/* ================================================================== */
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