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bb55c6d8a6
and ensure that the DeclContext of the SILFunction is used when mangling substituted archetypes found in inlined variable declarations that have been reparented into the caller <rdar://problem/28859432>
93 lines
3.1 KiB
C++
93 lines
3.1 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 - 2017 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 https://swift.org/LICENSE.txt for license information
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// See https://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 "DebugTypeInfo.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 "IRGenDebugInfo.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 &ti = getTypeInfo(var->getLoweredType());
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// If the variable is empty in all resilience domains, don't actually emit it;
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// just return undef.
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if (ti.isKnownEmpty(ResilienceExpansion::Minimal)) {
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if (DebugInfo && var->getDecl()) {
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auto DbgTy = DebugTypeInfo::getGlobal(var, Int8Ty, Size(0), Alignment(1));
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DebugInfo->emitGlobalVariableDeclaration(
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nullptr, var->getDecl()->getName().str(), "", DbgTy,
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var->getLinkage() != SILLinkage::Public, SILLocation(var->getDecl()));
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}
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return ti.getUndefAddress();
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}
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/// Get the global variable.
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Address addr = getAddrOfSILGlobalVariable(var, ti,
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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(gvar->getValueType()));
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}
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return addr;
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}
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StackAddress FixedTypeInfo::allocateStack(IRGenFunction &IGF, SILType T,
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bool isEntryBlock,
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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(ResilienceExpansion::Maximal)) {
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auto addr = getUndefAddress();
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return { addr };
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}
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Address alloca =
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IGF.createAlloca(getStorageType(), getFixedAlignment(), name);
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IGF.Builder.CreateLifetimeStart(alloca, getFixedSize());
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return { alloca };
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}
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void FixedTypeInfo::destroyStack(IRGenFunction &IGF, StackAddress addr,
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SILType T) const {
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destroy(IGF, addr.getAddress(), T);
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FixedTypeInfo::deallocateStack(IGF, addr, T);
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}
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void FixedTypeInfo::deallocateStack(IRGenFunction &IGF, StackAddress addr,
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SILType T) const {
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if (isKnownEmpty(ResilienceExpansion::Maximal))
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return;
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IGF.Builder.CreateLifetimeEnd(addr.getAddress(), getFixedSize());
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}
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