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7bddaf36a0
The new instruction is needed for opaque values mode to allow values to be extracted from tuples containing packs which will appear for example as function arguments.
505 lines
20 KiB
C++
505 lines
20 KiB
C++
//===--- SerializeSILPass.cpp ---------------------------------------------===//
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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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#define DEBUG_TYPE "serialize-sil"
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#include "swift/Strings.h"
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#include "swift/SIL/ApplySite.h"
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#include "swift/SIL/SILCloner.h"
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#include "swift/SIL/SILFunction.h"
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#include "swift/SILOptimizer/PassManager/Passes.h"
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#include "swift/SILOptimizer/PassManager/Transforms.h"
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#include "swift/SILOptimizer/Utils/BasicBlockOptUtils.h"
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using namespace swift;
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namespace {
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/// In place map opaque archetypes to their underlying type in a function.
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/// This needs to happen when a function changes from serializable to not
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/// serializable.
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class MapOpaqueArchetypes : public SILCloner<MapOpaqueArchetypes> {
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using SuperTy = SILCloner<MapOpaqueArchetypes>;
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SILBasicBlock *origEntryBlock;
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SILBasicBlock *clonedEntryBlock;
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public:
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friend class SILCloner<MapOpaqueArchetypes>;
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friend class SILCloner<MapOpaqueArchetypes>;
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friend class SILInstructionVisitor<MapOpaqueArchetypes>;
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MapOpaqueArchetypes(SILFunction &fun) : SuperTy(fun) {
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origEntryBlock = fun.getEntryBlock();
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clonedEntryBlock = fun.createBasicBlock();
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}
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SILType remapType(SILType Ty) {
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if (!Ty.getASTType()->hasOpaqueArchetype() ||
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!getBuilder()
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.getTypeExpansionContext()
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.shouldLookThroughOpaqueTypeArchetypes())
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return Ty;
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return getBuilder().getTypeLowering(Ty).getLoweredType().getCategoryType(
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Ty.getCategory());
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}
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CanType remapASTType(CanType ty) {
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if (!ty->hasOpaqueArchetype() ||
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!getBuilder()
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.getTypeExpansionContext()
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.shouldLookThroughOpaqueTypeArchetypes())
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return ty;
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// Remap types containing opaque result types in the current context.
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return getBuilder()
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.getTypeLowering(SILType::getPrimitiveObjectType(ty))
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.getLoweredType()
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.getASTType();
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}
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ProtocolConformanceRef remapConformance(Type ty,
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ProtocolConformanceRef conf) {
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auto context = getBuilder().getTypeExpansionContext();
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auto conformance = conf;
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if (ty->hasOpaqueArchetype() &&
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context.shouldLookThroughOpaqueTypeArchetypes()) {
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conformance =
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substOpaqueTypesWithUnderlyingTypes(conformance, ty, context);
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}
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return conformance;
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}
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void replace();
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};
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} // namespace
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void MapOpaqueArchetypes::replace() {
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// Map the function arguments.
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SmallVector<SILValue, 4> entryArgs;
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entryArgs.reserve(origEntryBlock->getArguments().size());
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for (auto &origArg : origEntryBlock->getArguments()) {
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SILType mappedType = remapType(origArg->getType());
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auto *NewArg = clonedEntryBlock->createFunctionArgument(
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mappedType, origArg->getDecl(), true);
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NewArg->copyFlags(cast<SILFunctionArgument>(origArg));
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entryArgs.push_back(NewArg);
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}
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getBuilder().setInsertionPoint(clonedEntryBlock);
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auto &fn = getBuilder().getFunction();
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cloneFunctionBody(&fn, clonedEntryBlock, entryArgs,
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true /*replaceOriginalFunctionInPlace*/);
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// Insert the new entry block at the beginning.
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fn.moveBlockBefore(clonedEntryBlock, fn.begin());
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removeUnreachableBlocks(fn);
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}
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static bool opaqueArchetypeWouldChange(TypeExpansionContext context,
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CanType ty) {
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if (!ty->hasOpaqueArchetype())
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return false;
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return ty.findIf([=](Type type) -> bool {
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if (auto opaqueTy = type->getAs<OpaqueTypeArchetypeType>()) {
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auto opaque = opaqueTy->getDecl();
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auto module = context.getContext()->getParentModule();
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OpaqueSubstitutionKind subKind =
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ReplaceOpaqueTypesWithUnderlyingTypes::shouldPerformSubstitution(
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opaque, module, context.getResilienceExpansion());
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return subKind != OpaqueSubstitutionKind::DontSubstitute;
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}
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return false;
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});
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}
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static bool hasOpaqueArchetypeOperand(TypeExpansionContext context,
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SILInstruction &inst) {
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// Check the operands for opaque types.
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for (auto &opd : inst.getAllOperands())
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if (opaqueArchetypeWouldChange(context, opd.get()->getType().getASTType()))
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return true;
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return false;
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}
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static bool hasOpaqueArchetypeResult(TypeExpansionContext context,
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SILInstruction &inst) {
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// Check the results for opaque types.
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for (SILValue res : inst.getResults())
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if (opaqueArchetypeWouldChange(context, res->getType().getASTType()))
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return true;
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return false;
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}
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static bool hasOpaqueArchetype(TypeExpansionContext context,
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SILInstruction &inst) {
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// Check operands and results.
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if (hasOpaqueArchetypeOperand(context, inst))
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return true;
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if (hasOpaqueArchetypeResult(context, inst))
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return true;
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// Check substitution maps.
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switch (inst.getKind()) {
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case SILInstructionKind::AllocStackInst:
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case SILInstructionKind::AllocPackInst:
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case SILInstructionKind::AllocPackMetadataInst:
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case SILInstructionKind::AllocRefInst:
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case SILInstructionKind::AllocRefDynamicInst:
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case SILInstructionKind::AllocBoxInst:
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case SILInstructionKind::AllocExistentialBoxInst:
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case SILInstructionKind::IndexAddrInst:
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case SILInstructionKind::TailAddrInst:
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case SILInstructionKind::IndexRawPointerInst:
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case SILInstructionKind::FunctionRefInst:
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case SILInstructionKind::DynamicFunctionRefInst:
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case SILInstructionKind::PreviousDynamicFunctionRefInst:
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case SILInstructionKind::GlobalAddrInst:
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case SILInstructionKind::GlobalValueInst:
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case SILInstructionKind::BaseAddrForOffsetInst:
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case SILInstructionKind::IntegerLiteralInst:
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case SILInstructionKind::FloatLiteralInst:
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case SILInstructionKind::StringLiteralInst:
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case SILInstructionKind::ClassMethodInst:
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case SILInstructionKind::SuperMethodInst:
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case SILInstructionKind::ObjCMethodInst:
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case SILInstructionKind::ObjCSuperMethodInst:
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case SILInstructionKind::WitnessMethodInst:
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case SILInstructionKind::UpcastInst:
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case SILInstructionKind::AddressToPointerInst:
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case SILInstructionKind::PointerToAddressInst:
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case SILInstructionKind::UncheckedRefCastInst:
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case SILInstructionKind::UncheckedAddrCastInst:
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case SILInstructionKind::UncheckedTrivialBitCastInst:
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case SILInstructionKind::UncheckedBitwiseCastInst:
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case SILInstructionKind::UncheckedValueCastInst:
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case SILInstructionKind::RefToRawPointerInst:
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case SILInstructionKind::RawPointerToRefInst:
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#define LOADABLE_REF_STORAGE(Name, ...) \
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case SILInstructionKind::RefTo##Name##Inst: \
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case SILInstructionKind::Name##ToRefInst:
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#include "swift/AST/ReferenceStorage.def"
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#undef LOADABLE_REF_STORAGE_HELPER
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case SILInstructionKind::ConvertFunctionInst:
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case SILInstructionKind::ConvertEscapeToNoEscapeInst:
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case SILInstructionKind::RefToBridgeObjectInst:
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case SILInstructionKind::BridgeObjectToRefInst:
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case SILInstructionKind::BridgeObjectToWordInst:
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case SILInstructionKind::ThinToThickFunctionInst:
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case SILInstructionKind::ThickToObjCMetatypeInst:
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case SILInstructionKind::ObjCToThickMetatypeInst:
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case SILInstructionKind::ObjCMetatypeToObjectInst:
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case SILInstructionKind::ObjCExistentialMetatypeToObjectInst:
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case SILInstructionKind::UnconditionalCheckedCastInst:
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case SILInstructionKind::ClassifyBridgeObjectInst:
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case SILInstructionKind::ValueToBridgeObjectInst:
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case SILInstructionKind::MarkDependenceInst:
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case SILInstructionKind::CopyBlockInst:
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case SILInstructionKind::CopyBlockWithoutEscapingInst:
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case SILInstructionKind::CopyValueInst:
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case SILInstructionKind::ExplicitCopyValueInst:
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case SILInstructionKind::MoveValueInst:
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case SILInstructionKind::DropDeinitInst:
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case SILInstructionKind::MarkMustCheckInst:
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case SILInstructionKind::MarkUnresolvedReferenceBindingInst:
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case SILInstructionKind::CopyableToMoveOnlyWrapperValueInst:
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case SILInstructionKind::MoveOnlyWrapperToCopyableValueInst:
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case SILInstructionKind::UnownedCopyValueInst:
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case SILInstructionKind::WeakCopyValueInst:
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#define REF_STORAGE(Name, ...) \
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case SILInstructionKind::StrongCopy##Name##ValueInst:
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#include "swift/AST/ReferenceStorage.def"
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case SILInstructionKind::UncheckedOwnershipConversionInst:
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case SILInstructionKind::IsUniqueInst:
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case SILInstructionKind::IsEscapingClosureInst:
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case SILInstructionKind::LoadInst:
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case SILInstructionKind::LoadBorrowInst:
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case SILInstructionKind::BeginBorrowInst:
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case SILInstructionKind::StoreBorrowInst:
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case SILInstructionKind::BeginAccessInst:
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case SILInstructionKind::MoveOnlyWrapperToCopyableAddrInst:
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case SILInstructionKind::MoveOnlyWrapperToCopyableBoxInst:
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case SILInstructionKind::CopyableToMoveOnlyWrapperAddrInst:
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#define NEVER_OR_SOMETIMES_LOADABLE_CHECKED_REF_STORAGE(Name, name, ...) \
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case SILInstructionKind::Load##Name##Inst:
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#include "swift/AST/ReferenceStorage.def"
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#undef NEVER_OR_SOMETIMES_LOADABLE_CHECKED_REF_STORAGE
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case SILInstructionKind::MarkUninitializedInst:
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case SILInstructionKind::ProjectBoxInst:
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case SILInstructionKind::ProjectExistentialBoxInst:
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case SILInstructionKind::BuiltinInst:
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case SILInstructionKind::MetatypeInst:
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case SILInstructionKind::ValueMetatypeInst:
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case SILInstructionKind::ExistentialMetatypeInst:
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case SILInstructionKind::ObjCProtocolInst:
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case SILInstructionKind::ObjectInst:
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case SILInstructionKind::TupleInst:
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case SILInstructionKind::TupleExtractInst:
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case SILInstructionKind::TuplePackExtractInst:
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case SILInstructionKind::TupleElementAddrInst:
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case SILInstructionKind::StructInst:
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case SILInstructionKind::StructExtractInst:
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case SILInstructionKind::StructElementAddrInst:
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case SILInstructionKind::RefElementAddrInst:
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case SILInstructionKind::RefTailAddrInst:
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case SILInstructionKind::EnumInst:
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case SILInstructionKind::UncheckedEnumDataInst:
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case SILInstructionKind::InitEnumDataAddrInst:
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case SILInstructionKind::UncheckedTakeEnumDataAddrInst:
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case SILInstructionKind::SelectEnumInst:
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case SILInstructionKind::SelectEnumAddrInst:
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case SILInstructionKind::InitExistentialAddrInst:
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case SILInstructionKind::InitExistentialValueInst:
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case SILInstructionKind::OpenExistentialAddrInst:
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case SILInstructionKind::InitExistentialRefInst:
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case SILInstructionKind::OpenExistentialRefInst:
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case SILInstructionKind::InitExistentialMetatypeInst:
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case SILInstructionKind::OpenExistentialMetatypeInst:
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case SILInstructionKind::OpenExistentialBoxInst:
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case SILInstructionKind::OpenExistentialValueInst:
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case SILInstructionKind::OpenExistentialBoxValueInst:
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case SILInstructionKind::ProjectBlockStorageInst:
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case SILInstructionKind::InitBlockStorageHeaderInst:
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case SILInstructionKind::KeyPathInst:
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case SILInstructionKind::UnreachableInst:
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case SILInstructionKind::ReturnInst:
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case SILInstructionKind::ThrowInst:
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case SILInstructionKind::YieldInst:
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case SILInstructionKind::UnwindInst:
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case SILInstructionKind::BranchInst:
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case SILInstructionKind::CondBranchInst:
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case SILInstructionKind::SwitchValueInst:
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case SILInstructionKind::SwitchEnumInst:
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case SILInstructionKind::SwitchEnumAddrInst:
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case SILInstructionKind::DynamicMethodBranchInst:
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case SILInstructionKind::CheckedCastBranchInst:
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case SILInstructionKind::CheckedCastAddrBranchInst:
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case SILInstructionKind::DeallocStackInst:
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case SILInstructionKind::DeallocStackRefInst:
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case SILInstructionKind::DeallocPackInst:
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case SILInstructionKind::DeallocPackMetadataInst:
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case SILInstructionKind::DeallocRefInst:
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case SILInstructionKind::DeallocPartialRefInst:
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case SILInstructionKind::DeallocBoxInst:
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case SILInstructionKind::DeallocExistentialBoxInst:
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case SILInstructionKind::StrongRetainInst:
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case SILInstructionKind::StrongReleaseInst:
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case SILInstructionKind::UnmanagedRetainValueInst:
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case SILInstructionKind::UnmanagedReleaseValueInst:
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case SILInstructionKind::UnmanagedAutoreleaseValueInst:
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#define ALWAYS_OR_SOMETIMES_LOADABLE_CHECKED_REF_STORAGE(Name, ...) \
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case SILInstructionKind::StrongRetain##Name##Inst: \
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case SILInstructionKind::Name##RetainInst: \
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case SILInstructionKind::Name##ReleaseInst:
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#include "swift/AST/ReferenceStorage.def"
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#undef ALWAYS_OR_SOMETIMES_LOADABLE_CHECKED_REF_STORAGE
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case SILInstructionKind::RetainValueInst:
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case SILInstructionKind::RetainValueAddrInst:
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case SILInstructionKind::ReleaseValueInst:
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case SILInstructionKind::ReleaseValueAddrInst:
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case SILInstructionKind::SetDeallocatingInst:
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case SILInstructionKind::AutoreleaseValueInst:
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case SILInstructionKind::BindMemoryInst:
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case SILInstructionKind::RebindMemoryInst:
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case SILInstructionKind::FixLifetimeInst:
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case SILInstructionKind::DestroyValueInst:
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case SILInstructionKind::EndBorrowInst:
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case SILInstructionKind::EndAccessInst:
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case SILInstructionKind::BeginUnpairedAccessInst:
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case SILInstructionKind::EndUnpairedAccessInst:
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case SILInstructionKind::StoreInst:
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case SILInstructionKind::AssignInst:
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case SILInstructionKind::AssignByWrapperInst:
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case SILInstructionKind::AssignOrInitInst:
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case SILInstructionKind::MarkFunctionEscapeInst:
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case SILInstructionKind::DebugValueInst:
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case SILInstructionKind::DebugStepInst:
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case SILInstructionKind::TestSpecificationInst:
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#define NEVER_OR_SOMETIMES_LOADABLE_CHECKED_REF_STORAGE(Name, ...) \
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case SILInstructionKind::Store##Name##Inst:
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#include "swift/AST/ReferenceStorage.def"
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case SILInstructionKind::CopyAddrInst:
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case SILInstructionKind::ExplicitCopyAddrInst:
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case SILInstructionKind::MarkUnresolvedMoveAddrInst:
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case SILInstructionKind::DestroyAddrInst:
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case SILInstructionKind::EndLifetimeInst:
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case SILInstructionKind::InjectEnumAddrInst:
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case SILInstructionKind::DeinitExistentialAddrInst:
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case SILInstructionKind::DeinitExistentialValueInst:
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case SILInstructionKind::UnconditionalCheckedCastAddrInst:
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case SILInstructionKind::UncheckedRefCastAddrInst:
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case SILInstructionKind::AllocGlobalInst:
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case SILInstructionKind::EndApplyInst:
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case SILInstructionKind::AbortApplyInst:
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case SILInstructionKind::CondFailInst:
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case SILInstructionKind::DestructureStructInst:
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case SILInstructionKind::DestructureTupleInst:
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case SILInstructionKind::DifferentiableFunctionInst:
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case SILInstructionKind::DifferentiableFunctionExtractInst:
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case SILInstructionKind::LinearFunctionInst:
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case SILInstructionKind::LinearFunctionExtractInst:
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case SILInstructionKind::DifferentiabilityWitnessFunctionInst:
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case SILInstructionKind::BeginCOWMutationInst:
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case SILInstructionKind::EndCOWMutationInst:
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case SILInstructionKind::IncrementProfilerCounterInst:
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case SILInstructionKind::GetAsyncContinuationInst:
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case SILInstructionKind::GetAsyncContinuationAddrInst:
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case SILInstructionKind::AwaitAsyncContinuationInst:
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case SILInstructionKind::HopToExecutorInst:
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case SILInstructionKind::ExtractExecutorInst:
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case SILInstructionKind::HasSymbolInst:
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case SILInstructionKind::PackElementGetInst:
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case SILInstructionKind::PackElementSetInst:
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case SILInstructionKind::TuplePackElementAddrInst:
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// Handle by operand and result check.
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break;
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case SILInstructionKind::PackLengthInst:
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// We reduce the pack shape, so it would very odd if this pack had
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// opaque archetypes in it, but there's no harm in doing it right.
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return opaqueArchetypeWouldChange(context,
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cast<PackLengthInst>(&inst)->getPackType());
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case SILInstructionKind::DynamicPackIndexInst:
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case SILInstructionKind::PackPackIndexInst:
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case SILInstructionKind::ScalarPackIndexInst:
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return opaqueArchetypeWouldChange(context,
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cast<AnyPackIndexInst>(&inst)->getIndexedPackType());
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case SILInstructionKind::OpenPackElementInst: {
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auto open = cast<OpenPackElementInst>(&inst);
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bool wouldChange = false;
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open->getOpenedGenericEnvironment()
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->forEachPackElementBinding([&](ElementArchetypeType *elementType,
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PackType *packSubstitution) {
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if (!wouldChange) {
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if (opaqueArchetypeWouldChange(context,
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packSubstitution->getCanonicalType()))
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wouldChange = true;
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}
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});
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return wouldChange;
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}
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case SILInstructionKind::ApplyInst:
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case SILInstructionKind::PartialApplyInst:
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case SILInstructionKind::TryApplyInst:
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case SILInstructionKind::BeginApplyInst:
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// Check substitution map.
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auto apply = ApplySite(&inst);
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auto subs = apply.getSubstitutionMap();
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for (auto ty: subs.getReplacementTypes()) {
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if (opaqueArchetypeWouldChange(context, ty->getCanonicalType()))
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return true;
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}
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break;
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}
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return false;
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}
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static bool hasOpaqueArchetypeArgument(TypeExpansionContext context, SILBasicBlock &BB) {
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for (auto *arg : BB.getArguments()) {
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if (opaqueArchetypeWouldChange(context, arg->getType().getASTType()))
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return true;
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}
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return false;
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}
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static bool hasAnyOpaqueArchetype(SILFunction &F) {
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bool foundOpaqueArchetype = false;
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auto context = F.getTypeExpansionContext();
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for (auto &BB : F) {
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// Check basic block argument types.
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if (hasOpaqueArchetypeArgument(context, BB)) {
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foundOpaqueArchetype = true;
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break;
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}
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// Check instruction results and operands.
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for (auto &inst : BB) {
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if (hasOpaqueArchetype(context, inst)) {
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foundOpaqueArchetype = true;
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break;
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}
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}
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if (foundOpaqueArchetype)
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break;
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}
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return foundOpaqueArchetype;
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}
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void updateOpaqueArchetypes(SILFunction &F) {
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// Only map if there are opaque archetypes that could change.
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if (!hasAnyOpaqueArchetype(F))
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return;
|
|
|
|
MapOpaqueArchetypes(F).replace();
|
|
}
|
|
|
|
/// A utility pass to serialize a SILModule at any place inside the optimization
|
|
/// pipeline.
|
|
class SerializeSILPass : public SILModuleTransform {
|
|
|
|
/// Removes [serialized] from all functions. This allows for more
|
|
/// optimizations and for a better dead function elimination.
|
|
void removeSerializedFlagFromAllFunctions(SILModule &M) {
|
|
for (auto &F : M) {
|
|
bool wasSerialized = F.isSerialized() != IsNotSerialized;
|
|
F.setSerialized(IsNotSerialized);
|
|
|
|
// We are removing [serialized] from the function. This will change how
|
|
// opaque archetypes are lowered in SIL - they might lower to their
|
|
// underlying type. Update the function's opaque archetypes.
|
|
if (wasSerialized && F.isDefinition()) {
|
|
updateOpaqueArchetypes(F);
|
|
invalidateAnalysis(&F, SILAnalysis::InvalidationKind::FunctionBody);
|
|
}
|
|
|
|
// After serialization we don't need to keep @alwaysEmitIntoClient
|
|
// functions alive, i.e. we don't need to treat them as public functions.
|
|
if (F.getLinkage() == SILLinkage::PublicNonABI && M.isWholeModule())
|
|
F.setLinkage(SILLinkage::Shared);
|
|
}
|
|
|
|
for (auto &WT : M.getWitnessTables()) {
|
|
WT.setSerialized(IsNotSerialized);
|
|
}
|
|
|
|
for (auto &VT : M.getVTables()) {
|
|
VT->setSerialized(IsNotSerialized);
|
|
}
|
|
|
|
for (auto &Deinit : M.getMoveOnlyDeinits()) {
|
|
Deinit->setSerialized(IsNotSerialized);
|
|
}
|
|
}
|
|
|
|
public:
|
|
SerializeSILPass() {}
|
|
|
|
void run() override {
|
|
auto &M = *getModule();
|
|
// Nothing to do if the module was serialized already.
|
|
if (M.isSerialized())
|
|
return;
|
|
|
|
LLVM_DEBUG(llvm::dbgs() << "Serializing SILModule in SerializeSILPass\n");
|
|
M.serialize();
|
|
|
|
removeSerializedFlagFromAllFunctions(M);
|
|
}
|
|
};
|
|
|
|
SILTransform *swift::createSerializeSILPass() {
|
|
return new SerializeSILPass();
|
|
}
|