| //===--- SILGenFunction.cpp - Top-level lowering for functions ------------===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See https://swift.org/LICENSE.txt for license information |
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the primary routines for creating and emitting |
| // functions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SILGenFunction.h" |
| #include "RValue.h" |
| #include "Scope.h" |
| #include "swift/AST/Initializer.h" |
| #include "swift/SIL/SILArgument.h" |
| #include "swift/SIL/SILUndef.h" |
| |
| using namespace swift; |
| using namespace Lowering; |
| |
| //===----------------------------------------------------------------------===// |
| // SILGenFunction Class implementation |
| //===----------------------------------------------------------------------===// |
| |
| SILGenFunction::SILGenFunction(SILGenModule &SGM, SILFunction &F) |
| : SGM(SGM), F(F), silConv(SGM.M), StartOfPostmatter(F.end()), |
| B(*this, createBasicBlock()), OpenedArchetypesTracker(F), |
| CurrentSILLoc(F.getLocation()), Cleanups(*this) { |
| B.setCurrentDebugScope(F.getDebugScope()); |
| B.setOpenedArchetypesTracker(&OpenedArchetypesTracker); |
| } |
| |
| /// SILGenFunction destructor - called after the entire function's AST has been |
| /// visited. This handles "falling off the end of the function" logic. |
| SILGenFunction::~SILGenFunction() { |
| // If the end of the function isn't terminated, we screwed up somewhere. |
| assert(!B.hasValidInsertionPoint() && |
| "SILGenFunction did not terminate function?!"); |
| |
| // If we didn't clean up the rethrow destination, we screwed up somewhere. |
| assert(!ThrowDest.isValid() && |
| "SILGenFunction did not emit throw destination"); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Function emission |
| //===----------------------------------------------------------------------===// |
| |
| // Get the #function name for a declaration. |
| DeclName SILGenModule::getMagicFunctionName(DeclContext *dc) { |
| // For closures, use the parent name. |
| if (auto closure = dyn_cast<AbstractClosureExpr>(dc)) { |
| return getMagicFunctionName(closure->getParent()); |
| } |
| if (auto absFunc = dyn_cast<AbstractFunctionDecl>(dc)) { |
| if (auto func = dyn_cast<FuncDecl>(absFunc)) { |
| // If this is an accessor, use the name of the storage. |
| if (auto storage = func->getAccessorStorageDecl()) { |
| return storage->getFullName(); |
| } |
| // If this is a defer body, use the parent name. |
| if (func->isDeferBody()) { |
| return getMagicFunctionName(func->getParent()); |
| } |
| } |
| |
| return absFunc->getFullName(); |
| } |
| if (auto init = dyn_cast<Initializer>(dc)) { |
| return getMagicFunctionName(init->getParent()); |
| } |
| if (auto nominal = dyn_cast<NominalTypeDecl>(dc)) { |
| return nominal->getName(); |
| } |
| if (auto tl = dyn_cast<TopLevelCodeDecl>(dc)) { |
| return tl->getModuleContext()->getName(); |
| } |
| if (auto fu = dyn_cast<FileUnit>(dc)) { |
| return fu->getParentModule()->getName(); |
| } |
| if (auto m = dyn_cast<ModuleDecl>(dc)) { |
| return m->getName(); |
| } |
| if (auto e = dyn_cast<ExtensionDecl>(dc)) { |
| assert(e->getExtendedType()->getAnyNominal() && "extension for nonnominal"); |
| return e->getExtendedType()->getAnyNominal()->getName(); |
| } |
| llvm_unreachable("unexpected #function context"); |
| } |
| |
| DeclName SILGenModule::getMagicFunctionName(SILDeclRef ref) { |
| switch (ref.kind) { |
| case SILDeclRef::Kind::Func: |
| if (auto closure = ref.getAbstractClosureExpr()) |
| return getMagicFunctionName(closure); |
| return getMagicFunctionName(cast<FuncDecl>(ref.getDecl())); |
| case SILDeclRef::Kind::Initializer: |
| case SILDeclRef::Kind::Allocator: |
| return getMagicFunctionName(cast<ConstructorDecl>(ref.getDecl())); |
| case SILDeclRef::Kind::Deallocator: |
| case SILDeclRef::Kind::Destroyer: |
| return getMagicFunctionName(cast<DestructorDecl>(ref.getDecl())); |
| case SILDeclRef::Kind::GlobalAccessor: |
| case SILDeclRef::Kind::GlobalGetter: |
| return getMagicFunctionName(cast<VarDecl>(ref.getDecl())->getDeclContext()); |
| case SILDeclRef::Kind::DefaultArgGenerator: |
| return getMagicFunctionName(cast<AbstractFunctionDecl>(ref.getDecl())); |
| case SILDeclRef::Kind::StoredPropertyInitializer: |
| return getMagicFunctionName(cast<VarDecl>(ref.getDecl())->getDeclContext()); |
| case SILDeclRef::Kind::IVarInitializer: |
| return getMagicFunctionName(cast<ClassDecl>(ref.getDecl())); |
| case SILDeclRef::Kind::IVarDestroyer: |
| return getMagicFunctionName(cast<ClassDecl>(ref.getDecl())); |
| case SILDeclRef::Kind::EnumElement: |
| return getMagicFunctionName(cast<EnumElementDecl>(ref.getDecl()) |
| ->getDeclContext()); |
| } |
| |
| llvm_unreachable("Unhandled SILDeclRefKind in switch."); |
| } |
| |
| std::tuple<ManagedValue, SILType> |
| SILGenFunction::emitSiblingMethodRef(SILLocation loc, |
| SILValue selfValue, |
| SILDeclRef methodConstant, |
| const SubstitutionMap &subMap) { |
| SILValue methodValue; |
| |
| // If the method is dynamic, access it through runtime-hookable virtual |
| // dispatch (viz. objc_msgSend for now). |
| if (methodConstant.hasDecl() |
| && methodConstant.getDecl()->isDynamic()) |
| methodValue = emitDynamicMethodRef(loc, methodConstant, |
| SGM.Types.getConstantInfo(methodConstant)); |
| else |
| methodValue = emitGlobalFunctionRef(loc, methodConstant); |
| |
| SILType methodTy = methodValue->getType(); |
| |
| // Specialize the generic method. |
| methodTy = methodTy.substGenericArgs(SGM.M, subMap); |
| |
| return std::make_tuple(ManagedValue::forUnmanaged(methodValue), |
| methodTy); |
| } |
| |
| void SILGenFunction::emitCaptures(SILLocation loc, |
| AnyFunctionRef closure, |
| CaptureEmission purpose, |
| SmallVectorImpl<ManagedValue> &capturedArgs) { |
| auto captureInfo = SGM.Types.getLoweredLocalCaptures(closure); |
| // For boxed captures, we need to mark the contained variables as having |
| // escaped for DI diagnostics. |
| SmallVector<SILValue, 2> escapesToMark; |
| |
| // Partial applications take ownership of the context parameters, so we'll |
| // need to pass ownership rather than merely guaranteeing parameters. |
| bool canGuarantee; |
| switch (purpose) { |
| case CaptureEmission::PartialApplication: |
| canGuarantee = false; |
| break; |
| case CaptureEmission::ImmediateApplication: |
| canGuarantee = true; |
| break; |
| } |
| // TODO: Or we always retain them when guaranteed contexts aren't enabled. |
| if (!SGM.M.getOptions().EnableGuaranteedClosureContexts) |
| canGuarantee = false; |
| |
| for (auto capture : captureInfo.getCaptures()) { |
| if (capture.isDynamicSelfMetadata()) { |
| // The parameter type is the static Self type, but the value we |
| // want to pass is the dynamic Self type, so upcast it. |
| auto dynamicSelfMetatype = MetatypeType::get( |
| captureInfo.getDynamicSelfType()); |
| SILType dynamicSILType = getLoweredType(dynamicSelfMetatype); |
| |
| SILValue value = B.createMetatype(loc, dynamicSILType); |
| capturedArgs.push_back(ManagedValue::forUnmanaged(value)); |
| continue; |
| } |
| |
| auto *vd = capture.getDecl(); |
| |
| switch (SGM.Types.getDeclCaptureKind(capture)) { |
| case CaptureKind::None: |
| break; |
| |
| case CaptureKind::Constant: { |
| // let declarations. |
| auto Entry = VarLocs[vd]; |
| |
| auto *var = cast<VarDecl>(vd); |
| auto &tl = getTypeLowering(var->getType()->getReferenceStorageReferent()); |
| SILValue Val = Entry.value; |
| |
| if (!Val->getType().isAddress()) { |
| // Our 'let' binding can guarantee the lifetime for the callee, |
| // if we don't need to do anything more to it. |
| if (canGuarantee && !var->getType()->is<ReferenceStorageType>()) { |
| auto guaranteed = ManagedValue::forUnmanaged(Val); |
| capturedArgs.push_back(guaranteed); |
| break; |
| } |
| |
| // Just retain a by-val let. |
| Val = B.emitCopyValueOperation(loc, Val); |
| } else { |
| // If we have a mutable binding for a 'let', such as 'self' in an |
| // 'init' method, load it. |
| Val = emitLoad(loc, Val, tl, SGFContext(), IsNotTake).forward(*this); |
| } |
| |
| // If we're capturing an unowned pointer by value, we will have just |
| // loaded it into a normal retained class pointer, but we capture it as |
| // an unowned pointer. Convert back now. |
| if (var->getType()->is<ReferenceStorageType>()) { |
| auto type = getLoweredType(var->getType()); |
| Val = emitConversionFromSemanticValue(loc, Val, type); |
| } |
| |
| capturedArgs.push_back(emitManagedRValueWithCleanup(Val)); |
| break; |
| } |
| |
| case CaptureKind::StorageAddress: { |
| // No-escaping stored declarations are captured as the |
| // address of the value. |
| assert(VarLocs.count(vd) && "no location for captured var!"); |
| VarLoc vl = VarLocs[vd]; |
| assert(vl.value->getType().isAddress() && "no address for captured var!"); |
| capturedArgs.push_back(ManagedValue::forLValue(vl.value)); |
| break; |
| } |
| |
| case CaptureKind::Box: { |
| // LValues are captured as both the box owning the value and the |
| // address of the value. |
| assert(VarLocs.count(vd) && "no location for captured var!"); |
| VarLoc vl = VarLocs[vd]; |
| assert(vl.value->getType().isAddress() && "no address for captured var!"); |
| |
| // If this is a boxed variable, we can use it directly. |
| if (vl.box) { |
| // We can guarantee our own box to the callee. |
| if (canGuarantee) { |
| capturedArgs.push_back(ManagedValue::forUnmanaged(vl.box)); |
| } else { |
| capturedArgs.push_back(emitManagedRetain(loc, vl.box)); |
| } |
| escapesToMark.push_back(vl.value); |
| } else { |
| // Address only 'let' values are passed by box. This isn't great, in |
| // that a variable captured by multiple closures will be boxed for each |
| // one. This could be improved by doing an "isCaptured" analysis when |
| // emitting address-only let constants, and emit them into an alloc_box |
| // like a variable instead of into an alloc_stack. |
| // |
| // TODO: This might not be profitable anymore with guaranteed captures, |
| // since we could conceivably forward the copied value into the |
| // closure context and pass it down to the partially applied function |
| // in-place. |
| // TODO: Use immutable box for immutable captures. |
| auto boxTy = SGM.Types.getContextBoxTypeForCapture(vd, |
| vl.value->getType().getSwiftRValueType(), |
| F.getGenericEnvironment(), |
| /*mutable*/ true); |
| |
| AllocBoxInst *allocBox = B.createAllocBox(loc, boxTy); |
| ProjectBoxInst *boxAddress = B.createProjectBox(loc, allocBox, 0); |
| B.createCopyAddr(loc, vl.value, boxAddress, IsNotTake,IsInitialization); |
| capturedArgs.push_back(emitManagedRValueWithCleanup(allocBox)); |
| } |
| |
| break; |
| } |
| } |
| } |
| |
| // Mark box addresses as captured for DI purposes. The values must have |
| // been fully initialized before we close over them. |
| if (!escapesToMark.empty()) { |
| B.createMarkFunctionEscape(loc, escapesToMark); |
| } |
| } |
| |
| ManagedValue |
| SILGenFunction::emitClosureValue(SILLocation loc, SILDeclRef constant, |
| CanType expectedType, |
| SubstitutionList subs) { |
| auto closure = *constant.getAnyFunctionRef(); |
| auto captureInfo = closure.getCaptureInfo(); |
| auto loweredCaptureInfo = SGM.Types.getLoweredLocalCaptures(closure); |
| auto hasCaptures = SGM.Types.hasLoweredLocalCaptures(closure); |
| assert(((constant.uncurryLevel == 1 && hasCaptures) || |
| (constant.uncurryLevel == 0 && !hasCaptures)) && |
| "curried local functions not yet supported"); |
| |
| auto constantInfo = getConstantInfo(constant); |
| SILValue functionRef = emitGlobalFunctionRef(loc, constant, constantInfo); |
| SILType functionTy = functionRef->getType(); |
| |
| // Apply substitutions. |
| auto pft = constantInfo.SILFnType; |
| |
| auto *dc = closure.getAsDeclContext()->getParent(); |
| if (dc->isLocalContext() && !loweredCaptureInfo.hasGenericParamCaptures()) { |
| // If the lowered function type is not polymorphic but we were given |
| // substitutions, we have a closure in a generic context which does not |
| // capture generic parameters. Just drop the substitutions. |
| subs = { }; |
| } else if (closure.getAbstractClosureExpr()) { |
| // If we have a closure expression in generic context, Sema won't give |
| // us substitutions, so we just use the forwarding substitutions from |
| // context. |
| subs = getForwardingSubstitutions(); |
| } |
| |
| bool wasSpecialized = false; |
| if (!subs.empty()) { |
| auto specialized = pft->substGenericArgs(F.getModule(), subs); |
| functionTy = SILType::getPrimitiveObjectType(specialized); |
| wasSpecialized = true; |
| } |
| |
| // If we're in top-level code, we don't need to physically capture script |
| // globals, but we still need to mark them as escaping so that DI can flag |
| // uninitialized uses. |
| if (this == SGM.TopLevelSGF) { |
| SGM.emitMarkFunctionEscapeForTopLevelCodeGlobals( |
| loc, captureInfo); |
| } |
| |
| if (!hasCaptures && !wasSpecialized) { |
| auto result = ManagedValue::forUnmanaged(functionRef); |
| return emitOrigToSubstValue(loc, result, |
| AbstractionPattern(expectedType), |
| expectedType); |
| } |
| |
| SmallVector<ManagedValue, 4> capturedArgs; |
| emitCaptures(loc, closure, CaptureEmission::PartialApplication, |
| capturedArgs); |
| |
| // The partial application takes ownership of the context parameters. |
| SmallVector<SILValue, 4> forwardedArgs; |
| for (auto capture : capturedArgs) |
| forwardedArgs.push_back(capture.forward(*this)); |
| |
| SILType closureTy = |
| SILGenBuilder::getPartialApplyResultType(functionRef->getType(), |
| capturedArgs.size(), SGM.M, |
| subs, |
| ParameterConvention::Direct_Owned); |
| auto toClosure = |
| B.createPartialApply(loc, functionRef, functionTy, |
| subs, forwardedArgs, closureTy); |
| auto result = emitManagedRValueWithCleanup(toClosure); |
| |
| // Get the lowered AST types: |
| // - the original type |
| auto origLoweredFormalType = |
| AbstractionPattern(constantInfo.LoweredInterfaceType); |
| if (hasCaptures) { |
| // Get the unlowered formal type of the constant, stripping off |
| // the first level of function application, which applies captures. |
| origLoweredFormalType = |
| AbstractionPattern(constantInfo.FormalInterfaceType) |
| .getFunctionResultType(); |
| |
| // Lower it, being careful to use the right generic signature. |
| origLoweredFormalType = |
| AbstractionPattern( |
| origLoweredFormalType.getGenericSignature(), |
| SGM.Types.getLoweredASTFunctionType( |
| cast<FunctionType>(origLoweredFormalType.getType()), |
| 0, constant)); |
| } |
| |
| // - the substituted type |
| auto substFormalType = cast<FunctionType>(expectedType); |
| auto substLoweredFormalType = |
| SGM.Types.getLoweredASTFunctionType(substFormalType, 0, constant); |
| |
| // Generalize if necessary. |
| result = emitOrigToSubstValue(loc, result, origLoweredFormalType, |
| substLoweredFormalType); |
| |
| return result; |
| } |
| |
| void SILGenFunction::emitFunction(FuncDecl *fd) { |
| MagicFunctionName = SILGenModule::getMagicFunctionName(fd); |
| |
| emitProlog(fd, fd->getParameterLists(), fd->getResultInterfaceType(), |
| fd->hasThrows()); |
| Type resultTy = fd->mapTypeIntoContext(fd->getResultInterfaceType()); |
| prepareEpilog(resultTy, fd->hasThrows(), CleanupLocation(fd)); |
| |
| emitProfilerIncrement(fd->getBody()); |
| emitStmt(fd->getBody()); |
| |
| emitEpilog(fd); |
| } |
| |
| void SILGenFunction::emitClosure(AbstractClosureExpr *ace) { |
| MagicFunctionName = SILGenModule::getMagicFunctionName(ace); |
| |
| auto resultIfaceTy = ace->mapTypeOutOfContext(ace->getResultType()); |
| emitProlog(ace, ace->getParameters(), resultIfaceTy, |
| ace->isBodyThrowing()); |
| prepareEpilog(ace->getResultType(), ace->isBodyThrowing(), |
| CleanupLocation(ace)); |
| if (auto *ce = dyn_cast<ClosureExpr>(ace)) { |
| emitProfilerIncrement(ce); |
| emitStmt(ce->getBody()); |
| } else { |
| auto *autoclosure = cast<AutoClosureExpr>(ace); |
| // Closure expressions implicitly return the result of their body |
| // expression. |
| emitProfilerIncrement(autoclosure); |
| emitReturnExpr(ImplicitReturnLocation(ace), |
| autoclosure->getSingleExpressionBody()); |
| } |
| emitEpilog(ace); |
| } |
| |
| void SILGenFunction::emitArtificialTopLevel(ClassDecl *mainClass) { |
| // Load argc and argv from the entry point arguments. |
| SILValue argc = F.begin()->getArgument(0); |
| SILValue argv = F.begin()->getArgument(1); |
| |
| switch (mainClass->getArtificialMainKind()) { |
| case ArtificialMainKind::UIApplicationMain: { |
| // Emit a UIKit main. |
| // return UIApplicationMain(C_ARGC, C_ARGV, nil, ClassName); |
| |
| CanType NSStringTy = SGM.Types.getNSStringType(); |
| CanType OptNSStringTy |
| = OptionalType::get(NSStringTy)->getCanonicalType(); |
| CanType IUOptNSStringTy |
| = ImplicitlyUnwrappedOptionalType::get(NSStringTy)->getCanonicalType(); |
| |
| // Look up UIApplicationMain. |
| // FIXME: Doing an AST lookup here is gross and not entirely sound; |
| // we're getting away with it because the types are guaranteed to already |
| // be imported. |
| ASTContext &ctx = getASTContext(); |
| ModuleDecl *UIKit = ctx.getLoadedModule(ctx.getIdentifier("UIKit")); |
| SmallVector<ValueDecl *, 1> results; |
| UIKit->lookupQualified(UIKit->getInterfaceType(), |
| ctx.getIdentifier("UIApplicationMain"), |
| NL_QualifiedDefault, |
| /*resolver*/nullptr, |
| results); |
| assert(!results.empty() && "couldn't find UIApplicationMain in UIKit"); |
| assert(results.size() == 1 && "more than one UIApplicationMain?"); |
| |
| SILDeclRef mainRef{results.front(), ResilienceExpansion::Minimal, |
| SILDeclRef::ConstructAtNaturalUncurryLevel, |
| /*isForeign*/true}; |
| auto UIApplicationMainFn = SGM.M.getOrCreateFunction(mainClass, mainRef, |
| NotForDefinition); |
| auto fnTy = UIApplicationMainFn->getLoweredFunctionType(); |
| SILFunctionConventions fnConv(fnTy, SGM.M); |
| |
| // Get the class name as a string using NSStringFromClass. |
| CanType mainClassTy = mainClass->getDeclaredInterfaceType() |
| ->getCanonicalType(); |
| CanType mainClassMetaty = CanMetatypeType::get(mainClassTy, |
| MetatypeRepresentation::ObjC); |
| ProtocolDecl *anyObjectProtocol = |
| ctx.getProtocol(KnownProtocolKind::AnyObject); |
| auto mainClassAnyObjectConformance = ProtocolConformanceRef( |
| *SGM.M.getSwiftModule()->lookupConformance(mainClassTy, anyObjectProtocol, |
| nullptr)); |
| CanType anyObjectTy = anyObjectProtocol |
| ->getDeclaredInterfaceType() |
| ->getCanonicalType(); |
| CanType anyObjectMetaTy = CanExistentialMetatypeType::get(anyObjectTy, |
| MetatypeRepresentation::ObjC); |
| |
| auto NSStringFromClassType = SILFunctionType::get(nullptr, |
| SILFunctionType::ExtInfo() |
| .withRepresentation(SILFunctionType::Representation:: |
| CFunctionPointer), |
| ParameterConvention::Direct_Unowned, |
| SILParameterInfo(anyObjectMetaTy, |
| ParameterConvention::Direct_Unowned), |
| SILResultInfo(OptNSStringTy, |
| ResultConvention::Autoreleased), |
| /*error result*/ None, |
| ctx); |
| auto NSStringFromClassFn |
| = SGM.M.getOrCreateFunction(mainClass, "NSStringFromClass", |
| SILLinkage::PublicExternal, |
| NSStringFromClassType, |
| IsBare, IsTransparent, IsNotSerialized); |
| auto NSStringFromClass = B.createFunctionRef(mainClass, NSStringFromClassFn); |
| SILValue metaTy = B.createMetatype(mainClass, |
| SILType::getPrimitiveObjectType(mainClassMetaty)); |
| metaTy = B.createInitExistentialMetatype(mainClass, metaTy, |
| SILType::getPrimitiveObjectType(anyObjectMetaTy), |
| ctx.AllocateCopy( |
| llvm::makeArrayRef(mainClassAnyObjectConformance))); |
| SILValue optName = B.createApply(mainClass, |
| NSStringFromClass, |
| NSStringFromClass->getType(), |
| SILType::getPrimitiveObjectType(OptNSStringTy), |
| {}, metaTy); |
| |
| // Fix up the string parameters to have the right type. |
| SILType nameArgTy = fnConv.getSILArgumentType(3); |
| assert(nameArgTy == fnConv.getSILArgumentType(2)); |
| auto managedName = ManagedValue::forUnmanaged(optName); |
| SILValue nilValue; |
| if (optName->getType() == nameArgTy) { |
| nilValue = getOptionalNoneValue(mainClass, |
| getTypeLowering(OptNSStringTy)); |
| } else { |
| assert(nameArgTy.getSwiftRValueType() == IUOptNSStringTy); |
| nilValue = getOptionalNoneValue(mainClass, |
| getTypeLowering(IUOptNSStringTy)); |
| managedName = emitOptionalToOptional( |
| mainClass, managedName, |
| SILType::getPrimitiveObjectType(IUOptNSStringTy), |
| [](SILGenFunction &, SILLocation, ManagedValue input, SILType) { |
| return input; |
| }); |
| } |
| |
| // Fix up argv to have the right type. |
| auto argvTy = fnConv.getSILArgumentType(1); |
| |
| SILType unwrappedTy = argvTy; |
| if (Type innerTy = argvTy.getSwiftRValueType()->getAnyOptionalObjectType()){ |
| auto canInnerTy = innerTy->getCanonicalType(); |
| unwrappedTy = SILType::getPrimitiveObjectType(canInnerTy); |
| } |
| |
| auto managedArgv = ManagedValue::forUnmanaged(argv); |
| |
| if (unwrappedTy != argv->getType()) { |
| auto converted = |
| emitPointerToPointer(mainClass, managedArgv, |
| argv->getType().getSwiftRValueType(), |
| unwrappedTy.getSwiftRValueType()); |
| managedArgv = std::move(converted).getAsSingleValue(*this, mainClass); |
| } |
| |
| if (unwrappedTy != argvTy) { |
| managedArgv = getOptionalSomeValue(mainClass, managedArgv, |
| getTypeLowering(argvTy)); |
| } |
| |
| auto UIApplicationMain = B.createFunctionRef(mainClass, UIApplicationMainFn); |
| |
| SILValue args[] = {argc, managedArgv.getValue(), nilValue, |
| managedName.getValue()}; |
| |
| B.createApply(mainClass, UIApplicationMain, |
| UIApplicationMain->getType(), |
| argc->getType(), {}, args); |
| SILValue r = B.createIntegerLiteral(mainClass, |
| SILType::getBuiltinIntegerType(32, ctx), 0); |
| auto rType = F.getConventions().getSingleSILResultType(); |
| if (r->getType() != rType) |
| r = B.createStruct(mainClass, rType, r); |
| |
| Cleanups.emitCleanupsForReturn(mainClass); |
| B.createReturn(mainClass, r); |
| return; |
| } |
| |
| case ArtificialMainKind::NSApplicationMain: { |
| // Emit an AppKit main. |
| // return NSApplicationMain(C_ARGC, C_ARGV); |
| |
| SILParameterInfo argTypes[] = { |
| SILParameterInfo(argc->getType().getSwiftRValueType(), |
| ParameterConvention::Direct_Unowned), |
| SILParameterInfo(argv->getType().getSwiftRValueType(), |
| ParameterConvention::Direct_Unowned), |
| }; |
| auto NSApplicationMainType = SILFunctionType::get(nullptr, |
| SILFunctionType::ExtInfo() |
| // Should be C calling convention, but NSApplicationMain |
| // has an overlay to fix the type of argv. |
| .withRepresentation(SILFunctionType::Representation::Thin), |
| ParameterConvention::Direct_Unowned, |
| argTypes, |
| SILResultInfo(argc->getType().getSwiftRValueType(), |
| ResultConvention::Unowned), |
| /*error result*/ None, |
| getASTContext()); |
| |
| auto NSApplicationMainFn |
| = SGM.M.getOrCreateFunction(mainClass, "NSApplicationMain", |
| SILLinkage::PublicExternal, |
| NSApplicationMainType, |
| IsBare, IsTransparent, IsNotSerialized); |
| |
| auto NSApplicationMain = B.createFunctionRef(mainClass, NSApplicationMainFn); |
| SILValue args[] = { argc, argv }; |
| |
| B.createApply(mainClass, NSApplicationMain, |
| NSApplicationMain->getType(), |
| argc->getType(), {}, args); |
| SILValue r = B.createIntegerLiteral(mainClass, |
| SILType::getBuiltinIntegerType(32, getASTContext()), 0); |
| auto rType = F.getConventions().getSingleSILResultType(); |
| if (r->getType() != rType) |
| r = B.createStruct(mainClass, rType, r); |
| B.createReturn(mainClass, r); |
| return; |
| } |
| } |
| } |
| |
| void SILGenFunction::emitGeneratorFunction(SILDeclRef function, Expr *value) { |
| MagicFunctionName = SILGenModule::getMagicFunctionName(function); |
| |
| RegularLocation Loc(value); |
| Loc.markAutoGenerated(); |
| |
| // Override location for #file, #line etc. to an invalid one so that we |
| // don't put extra strings into the default argument generator function that |
| // is not going to be ever used anyway. |
| overrideLocationForMagicIdentifiers = SourceLoc(); |
| |
| auto *dc = function.getDecl()->getInnermostDeclContext(); |
| auto interfaceType = dc->mapTypeOutOfContext(value->getType()); |
| emitProlog({}, interfaceType, dc, false); |
| prepareEpilog(value->getType(), false, CleanupLocation::get(Loc)); |
| emitReturnExpr(Loc, value); |
| emitEpilog(Loc); |
| } |
