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74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
//===--- GenInit.cpp - IR Generation for Initialization -------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements IR generation for the initialization of
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// local and global variables.
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//
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//
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//===----------------------------------------------------------------------===//
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#include "swift/AST/Pattern.h"
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#include "swift/SIL/SILDeclRef.h"
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#include "swift/SIL/SILGlobalVariable.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "Explosion.h"
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#include "GenHeap.h"
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#include "GenTuple.h"
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#include "IRGenFunction.h"
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#include "IRGenModule.h"
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#include "FixedTypeInfo.h"
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using namespace swift;
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using namespace irgen;
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/// Emit a global variable.
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Address IRGenModule::emitSILGlobalVariable(SILGlobalVariable *var) {
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auto &type = getTypeInfo(var->getLoweredType());
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// If the variable is empty, don't actually emit it; just return undef.
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if (type.isKnownEmpty()) {
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return type.getUndefAddress();
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}
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/// Get the global variable.
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Address addr = getAddrOfSILGlobalVariable(var,
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var->isDefinition() ? ForDefinition : NotForDefinition);
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/// Add a zero initializer.
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if (var->isDefinition()) {
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auto gvar = cast<llvm::GlobalVariable>(addr.getAddress());
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gvar->setInitializer(llvm::Constant::getNullValue(type.getStorageType()));
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}
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return addr;
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}
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ContainedAddress FixedTypeInfo::allocateStack(IRGenFunction &IGF, SILType T,
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const Twine &name) const {
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// If the type is known to be empty, don't actually allocate anything.
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if (isKnownEmpty()) {
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auto addr = getUndefAddress();
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return { addr, addr };
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}
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Address alloca =
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IGF.createAlloca(getStorageType(), getFixedAlignment(), name);
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// TODO: lifetime intrinsics?
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return { alloca, alloca };
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}
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void FixedTypeInfo::deallocateStack(IRGenFunction &IGF, Address addr,
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SILType T) const {
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// TODO: lifetime intrinsics?
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}
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