mirror of
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1f3f33e67d
discourage accidental use of them. Relatedly, fix several bugs where we were accidentally using dynamic allocas.
5221 lines
195 KiB
C++
5221 lines
195 KiB
C++
//===--- IRGenSIL.cpp - Swift Per-Function IR Generation ------------------===//
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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 basic setup and teardown for the class which
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// performs IR generation for function bodies.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "irgensil"
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/InlineAsm.h"
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#include "llvm/IR/Intrinsics.h"
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/SmallBitVector.h"
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#include "llvm/ADT/TinyPtrVector.h"
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#include "llvm/Support/Debug.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/Basic/TargetInfo.h"
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#include "swift/Basic/ExternalUnion.h"
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#include "swift/Basic/Range.h"
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#include "swift/Basic/STLExtras.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/IRGenOptions.h"
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#include "swift/AST/Pattern.h"
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#include "swift/AST/ParameterList.h"
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#include "swift/AST/SubstitutionMap.h"
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#include "swift/AST/Types.h"
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#include "swift/SIL/Dominance.h"
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#include "swift/SIL/PrettyStackTrace.h"
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#include "swift/SIL/SILDebugScope.h"
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#include "swift/SIL/SILDeclRef.h"
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#include "swift/SIL/SILLinkage.h"
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#include "swift/SIL/SILModule.h"
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#include "swift/SIL/SILType.h"
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#include "swift/SIL/SILVisitor.h"
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#include "swift/SIL/InstructionUtils.h"
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#include "clang/CodeGen/CodeGenABITypes.h"
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#include "CallEmission.h"
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#include "Explosion.h"
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#include "GenArchetype.h"
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#include "GenBuiltin.h"
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#include "GenCall.h"
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#include "GenCast.h"
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#include "GenClass.h"
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#include "GenConstant.h"
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#include "GenEnum.h"
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#include "GenExistential.h"
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#include "GenFunc.h"
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#include "GenHeap.h"
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#include "GenMeta.h"
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#include "GenObjC.h"
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#include "GenOpaque.h"
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#include "GenPoly.h"
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#include "GenProto.h"
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#include "GenStruct.h"
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#include "GenTuple.h"
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#include "GenType.h"
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#include "IRGenDebugInfo.h"
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#include "IRGenModule.h"
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#include "NativeConventionSchema.h"
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#include "ReferenceTypeInfo.h"
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#include "WeakTypeInfo.h"
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using namespace swift;
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using namespace irgen;
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namespace {
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class LoweredValue;
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struct DynamicallyEnforcedAddress {
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Address Addr;
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llvm::Value *ScratchBuffer;
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};
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/// Represents a SIL value lowered to IR, in one of these forms:
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/// - an Address, corresponding to a SIL address value;
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/// - an Explosion of (unmanaged) Values, corresponding to a SIL "register"; or
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/// - a CallEmission for a partially-applied curried function or method.
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class LoweredValue {
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public:
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enum class Kind {
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/// The first two LoweredValue kinds correspond to a SIL address value.
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///
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/// The LoweredValue of an existential alloc_stack keeps an owning container
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/// in addition to the address of the allocated buffer.
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/// Depending on the allocated type, the container may be equal to the
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/// buffer itself (for types with known sizes) or it may be the address
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/// of a fixed-size container which points to the heap-allocated buffer.
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/// In this case the address-part may be null, which means that the buffer
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/// is not allocated yet.
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ContainedAddress,
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/// The LoweredValue of a resilient, generic, or loadable typed alloc_stack
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/// keeps an optional stackrestore point in addition to the address of the
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/// allocated buffer. For all other address values the stackrestore point is
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/// just null.
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/// If the stackrestore point is set (currently, this might happen for
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/// opaque types: generic and resilient) the deallocation of the stack must
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/// reset the stack pointer to this point.
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StackAddress,
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/// A @box together with the address of the box value.
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OwnedAddress,
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/// The lowered value of a begin_access instruction using dynamic
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/// enforcement.
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DynamicallyEnforcedAddress,
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/// A normal value, represented as an exploded array of llvm Values.
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ExplosionVector,
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/// The special case of a single explosion.
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SingletonExplosion,
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/// A value that represents a function pointer.
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FunctionPointer,
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/// A value that represents an Objective-C method that must be called with
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/// a form of objc_msgSend.
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ObjCMethod,
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/// The special case of an empty explosion.
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EmptyExplosion,
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};
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Kind kind;
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private:
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using ExplosionVector = SmallVector<llvm::Value *, 4>;
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using SingletonExplosion = llvm::Value*;
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using Members = ExternalUnionMembers<ContainedAddress,
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StackAddress,
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OwnedAddress,
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DynamicallyEnforcedAddress,
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ExplosionVector,
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SingletonExplosion,
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FunctionPointer,
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ObjCMethod,
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void>;
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static Members::Index getMemberIndexForKind(Kind kind) {
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switch (kind) {
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case Kind::ContainedAddress: return Members::indexOf<ContainedAddress>();
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case Kind::StackAddress: return Members::indexOf<StackAddress>();
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case Kind::OwnedAddress: return Members::indexOf<OwnedAddress>();
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case Kind::DynamicallyEnforcedAddress: return Members::indexOf<DynamicallyEnforcedAddress>();
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case Kind::ExplosionVector: return Members::indexOf<ExplosionVector>();
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case Kind::SingletonExplosion: return Members::indexOf<SingletonExplosion>();
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case Kind::FunctionPointer: return Members::indexOf<FunctionPointer>();
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case Kind::ObjCMethod: return Members::indexOf<ObjCMethod>();
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case Kind::EmptyExplosion: return Members::indexOf<void>();
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}
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llvm_unreachable("bad kind");
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}
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ExternalUnion<Kind, Members, getMemberIndexForKind> Storage;
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public:
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/// Create an address value without a stack restore point.
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LoweredValue(const Address &address)
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: kind(Kind::StackAddress) {
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Storage.emplace<StackAddress>(kind, address);
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}
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/// Create an address value with an optional stack restore point.
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LoweredValue(const StackAddress &address)
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: kind(Kind::StackAddress) {
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Storage.emplace<StackAddress>(kind, address);
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}
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/// Create an address value using dynamic enforcement.
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LoweredValue(const DynamicallyEnforcedAddress &address)
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: kind(Kind::DynamicallyEnforcedAddress) {
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Storage.emplace<DynamicallyEnforcedAddress>(kind, address);
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}
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enum ContainerForUnallocatedAddress_t { ContainerForUnallocatedAddress };
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/// Create an address value for an alloc_stack, consisting of a container and
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/// a not yet allocated buffer.
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LoweredValue(const Address &container, ContainerForUnallocatedAddress_t)
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: kind(Kind::ContainedAddress) {
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Storage.emplace<ContainedAddress>(kind, container, Address());
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}
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/// Create an address value for an alloc_stack, consisting of a container and
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/// the address of the allocated buffer.
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LoweredValue(const ContainedAddress &address)
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: kind(Kind::ContainedAddress) {
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Storage.emplace<ContainedAddress>(kind, address);
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}
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LoweredValue(const FunctionPointer &fn)
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: kind(Kind::FunctionPointer) {
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Storage.emplace<FunctionPointer>(kind, fn);
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}
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LoweredValue(ObjCMethod &&objcMethod)
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: kind(Kind::ObjCMethod) {
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Storage.emplace<ObjCMethod>(kind, std::move(objcMethod));
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}
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LoweredValue(Explosion &e) {
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auto elts = e.claimAll();
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if (elts.empty()) {
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kind = Kind::EmptyExplosion;
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} else if (elts.size() == 1) {
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kind = Kind::SingletonExplosion;
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Storage.emplace<SingletonExplosion>(kind, elts.front());
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} else {
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kind = Kind::ExplosionVector;
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auto &explosion = Storage.emplace<ExplosionVector>(kind);
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explosion.append(elts.begin(), elts.end());
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}
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}
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LoweredValue(const OwnedAddress &boxWithAddress)
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: kind(Kind::OwnedAddress) {
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Storage.emplace<OwnedAddress>(kind, boxWithAddress);
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}
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LoweredValue(LoweredValue &&lv)
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: kind(lv.kind) {
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Storage.moveConstruct(kind, std::move(lv.Storage));
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}
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LoweredValue &operator=(LoweredValue &&lv) {
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Storage.moveAssign(kind, lv.kind, std::move(lv.Storage));
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kind = lv.kind;
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return *this;
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}
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~LoweredValue() {
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Storage.destruct(kind);
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}
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bool isAddress() const {
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return (kind == Kind::StackAddress ||
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kind == Kind::DynamicallyEnforcedAddress);
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}
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bool isUnallocatedAddressInBuffer() const {
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return kind == Kind::ContainedAddress &&
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!Storage.get<ContainedAddress>(kind).getAddress().isValid();
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}
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bool isBoxWithAddress() const {
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return kind == Kind::OwnedAddress;
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}
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const StackAddress &getStackAddress() const {
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return Storage.get<StackAddress>(kind);
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}
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Address getContainerOfAddress() const {
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const auto &containedAddress = Storage.get<ContainedAddress>(kind);
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assert(containedAddress.getContainer().isValid() && "address has no container");
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return containedAddress.getContainer();
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}
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Address getAddressInContainer() const {
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const auto &containedAddress = Storage.get<ContainedAddress>(kind);
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assert(containedAddress.getContainer().isValid() &&
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"address has no container");
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return containedAddress.getAddress();
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}
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const DynamicallyEnforcedAddress &getDynamicallyEnforcedAddress() const {
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return Storage.get<DynamicallyEnforcedAddress>(kind);
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}
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Address getAnyAddress() const {
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if (kind == LoweredValue::Kind::StackAddress) {
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return Storage.get<StackAddress>(kind).getAddress();
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} else if (kind == LoweredValue::Kind::ContainedAddress) {
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return getAddressInContainer();
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} else {
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return getDynamicallyEnforcedAddress().Addr;
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}
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}
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Address getAddressOfBox() const {
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return Storage.get<OwnedAddress>(kind).getAddress();
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}
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ArrayRef<llvm::Value *> getKnownExplosionVector() const {
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return Storage.get<ExplosionVector>(kind);
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}
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llvm::Value *getKnownSingletonExplosion() const {
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return Storage.get<SingletonExplosion>(kind);
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}
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const FunctionPointer &getFunctionPointer() const {
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return Storage.get<FunctionPointer>(kind);
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}
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const ObjCMethod &getObjCMethod() const {
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return Storage.get<ObjCMethod>(kind);
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}
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/// Produce an explosion for this lowered value. Note that many
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/// different storage kinds can be turned into an explosion.
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Explosion getExplosion(IRGenFunction &IGF, SILType type) const {
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Explosion e;
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getExplosion(IGF, type, e);
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return e;
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}
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void getExplosion(IRGenFunction &IGF, SILType type, Explosion &ex) const;
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/// Produce an explosion which is known to be a single value.
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llvm::Value *getSingletonExplosion(IRGenFunction &IGF, SILType type) const;
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/// Produce a callee from this value.
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Callee getCallee(IRGenFunction &IGF, llvm::Value *selfValue,
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CalleeInfo &&calleeInfo) const;
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};
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using PHINodeVector = llvm::TinyPtrVector<llvm::PHINode*>;
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/// Represents a lowered SIL basic block. This keeps track
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/// of SIL branch arguments so that they can be lowered to LLVM phi nodes.
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struct LoweredBB {
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llvm::BasicBlock *bb;
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PHINodeVector phis;
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LoweredBB() = default;
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explicit LoweredBB(llvm::BasicBlock *bb, PHINodeVector &&phis)
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: bb(bb), phis(std::move(phis))
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{}
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};
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/// Visits a SIL Function and generates LLVM IR.
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class IRGenSILFunction :
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public IRGenFunction, public SILInstructionVisitor<IRGenSILFunction>
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{
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public:
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llvm::DenseMap<SILValue, LoweredValue> LoweredValues;
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llvm::DenseMap<SILType, LoweredValue> LoweredUndefs;
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/// All alloc_ref instructions which allocate the object on the stack.
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llvm::SmallPtrSet<SILInstruction *, 8> StackAllocs;
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/// With closure captures it is actually possible to have two function
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/// arguments that both have the same name. Until this is fixed, we need to
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/// also hash the ArgNo here.
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typedef std::pair<unsigned, std::pair<const SILDebugScope *, StringRef>>
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StackSlotKey;
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/// Keeps track of the mapping of source variables to -O0 shadow copy allocas.
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llvm::SmallDenseMap<StackSlotKey, Address, 8> ShadowStackSlots;
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llvm::SmallDenseMap<Decl *, SmallString<4>, 8> AnonymousVariables;
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/// To avoid inserting elements into ValueDomPoints twice.
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llvm::SmallDenseSet<llvm::Instruction *, 8> ValueVariables;
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/// Holds the DominancePoint of values that are storage for a source variable.
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SmallVector<std::pair<llvm::Instruction *, DominancePoint>, 8> ValueDomPoints;
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unsigned NumAnonVars = 0;
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unsigned NumCondFails = 0;
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/// Accumulative amount of allocated bytes on the stack. Used to limit the
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/// size for stack promoted objects.
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/// We calculate it on demand, so that we don't have to do it if the
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/// function does not have any stack promoted allocations.
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int EstimatedStackSize = -1;
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llvm::MapVector<SILBasicBlock *, LoweredBB> LoweredBBs;
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// Destination basic blocks for condfail traps.
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llvm::SmallVector<llvm::BasicBlock *, 8> FailBBs;
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SILFunction *CurSILFn;
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Address IndirectReturn;
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// A cached dominance analysis.
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std::unique_ptr<DominanceInfo> Dominance;
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IRGenSILFunction(IRGenModule &IGM, SILFunction *f);
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~IRGenSILFunction();
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/// Generate IR for the SIL Function.
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void emitSILFunction();
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/// Calculates EstimatedStackSize.
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void estimateStackSize();
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void setLoweredValue(SILValue v, LoweredValue &&lv) {
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auto inserted = LoweredValues.insert({v, std::move(lv)});
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assert(inserted.second && "already had lowered value for sil value?!");
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(void)inserted;
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}
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/// Create a new Address corresponding to the given SIL address value.
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void setLoweredAddress(SILValue v, const Address &address) {
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assert(v->getType().isAddress() && "address for non-address value?!");
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setLoweredValue(v, address);
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}
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void setLoweredStackAddress(SILValue v, const StackAddress &address) {
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assert(v->getType().isAddress() && "address for non-address value?!");
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setLoweredValue(v, address);
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}
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void setLoweredDynamicallyEnforcedAddress(SILValue v,
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const Address &address,
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llvm::Value *scratch) {
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assert(v->getType().isAddress() && "address for non-address value?!");
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setLoweredValue(v, DynamicallyEnforcedAddress{address, scratch});
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}
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void setContainerOfUnallocatedAddress(SILValue v,
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const Address &buffer) {
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assert(v->getType().isAddress() && "address for non-address value?!");
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setLoweredValue(v,
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LoweredValue(buffer, LoweredValue::ContainerForUnallocatedAddress));
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}
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void overwriteAllocatedAddress(SILValue v, const Address &address) {
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assert(v->getType().isAddress() && "address for non-address value?!");
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auto it = LoweredValues.find(v);
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assert(it != LoweredValues.end() && "no existing entry for overwrite?");
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assert(it->second.isUnallocatedAddressInBuffer() &&
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"not an unallocated address");
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it->second = ContainedAddress(it->second.getContainerOfAddress(), address);
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}
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void setAllocatedAddressForBuffer(SILValue v, const Address &allocedAddress);
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/// Create a new Explosion corresponding to the given SIL value.
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void setLoweredExplosion(SILValue v, Explosion &e) {
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assert(v->getType().isObject() && "explosion for address value?!");
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setLoweredValue(v, LoweredValue(e));
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}
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void setLoweredBox(SILValue v, const OwnedAddress &box) {
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assert(v->getType().isObject() && "box for address value?!");
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setLoweredValue(v, LoweredValue(box));
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}
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/// Map the given SIL value to a FunctionPointer value.
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void setLoweredFunctionPointer(SILValue v, const FunctionPointer &fnPtr) {
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assert(v->getType().isObject() && "function for address value?!");
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assert(v->getType().is<SILFunctionType>() &&
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"function for non-function value?!");
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setLoweredValue(v, fnPtr);
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}
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/// Create a new Objective-C method corresponding to the given SIL value.
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void setLoweredObjCMethod(SILValue v, SILDeclRef method) {
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assert(v->getType().isObject() && "function for address value?!");
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assert(v->getType().is<SILFunctionType>() &&
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"function for non-function value?!");
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setLoweredValue(v, ObjCMethod{method, SILType(), false});
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}
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/// Create a new Objective-C method corresponding to the given SIL value that
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/// starts its search from the given search type.
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///
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/// Unlike \c setLoweredObjCMethod, which finds the method in the actual
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/// runtime type of the object, this routine starts at the static type of the
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/// object and searches up the class hierarchy (toward superclasses).
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///
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/// \param searchType The class from which the Objective-C runtime will start
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/// its search for a method.
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///
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/// \param startAtSuper Whether we want to start at the superclass of the
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/// static type (vs. the static type itself).
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void setLoweredObjCMethodBounded(SILValue v, SILDeclRef method,
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SILType searchType, bool startAtSuper) {
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assert(v->getType().isObject() && "function for address value?!");
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assert(v->getType().is<SILFunctionType>() &&
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"function for non-function value?!");
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setLoweredValue(v, ObjCMethod{method, searchType, startAtSuper});
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}
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LoweredValue &getUndefLoweredValue(SILType t) {
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auto found = LoweredUndefs.find(t);
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|
if (found != LoweredUndefs.end())
|
|
return found->second;
|
|
|
|
auto &ti = getTypeInfo(t);
|
|
switch (t.getCategory()) {
|
|
case SILValueCategory::Address: {
|
|
Address undefAddr = ti.getAddressForPointer(
|
|
llvm::UndefValue::get(ti.getStorageType()->getPointerTo()));
|
|
LoweredUndefs.insert({t, LoweredValue(undefAddr)});
|
|
break;
|
|
}
|
|
|
|
case SILValueCategory::Object: {
|
|
auto schema = ti.getSchema();
|
|
Explosion e;
|
|
for (auto &elt : schema) {
|
|
assert(!elt.isAggregate()
|
|
&& "non-scalar element in loadable type schema?!");
|
|
e.add(llvm::UndefValue::get(elt.getScalarType()));
|
|
}
|
|
LoweredUndefs.insert({t, LoweredValue(e)});
|
|
break;
|
|
}
|
|
}
|
|
|
|
found = LoweredUndefs.find(t);
|
|
assert(found != LoweredUndefs.end());
|
|
return found->second;
|
|
}
|
|
|
|
/// Get the LoweredValue corresponding to the given SIL value, which must
|
|
/// have been lowered.
|
|
LoweredValue &getLoweredValue(SILValue v) {
|
|
if (isa<SILUndef>(v))
|
|
return getUndefLoweredValue(v->getType());
|
|
|
|
auto foundValue = LoweredValues.find(v);
|
|
assert(foundValue != LoweredValues.end() &&
|
|
"no lowered explosion for sil value!");
|
|
return foundValue->second;
|
|
}
|
|
|
|
/// Get the Address of a SIL value of address type, which must have been
|
|
/// lowered.
|
|
Address getLoweredAddress(SILValue v) {
|
|
return getLoweredValue(v).getAnyAddress();
|
|
}
|
|
|
|
StackAddress getLoweredStackAddress(SILValue v) {
|
|
return getLoweredValue(v).getStackAddress();
|
|
}
|
|
|
|
llvm::Value *getLoweredDynamicEnforcementScratchBuffer(BeginAccessInst *v) {
|
|
return getLoweredValue(v).getDynamicallyEnforcedAddress().ScratchBuffer;
|
|
}
|
|
|
|
/// Add the unmanaged LLVM values lowered from a SIL value to an explosion.
|
|
void getLoweredExplosion(SILValue v, Explosion &e) {
|
|
getLoweredValue(v).getExplosion(*this, v->getType(), e);
|
|
}
|
|
/// Create an Explosion containing the unmanaged LLVM values lowered from a
|
|
/// SIL value.
|
|
Explosion getLoweredExplosion(SILValue v) {
|
|
return getLoweredValue(v).getExplosion(*this, v->getType());
|
|
}
|
|
|
|
/// Return the single member of the lowered explosion for the
|
|
/// given SIL value.
|
|
llvm::Value *getLoweredSingletonExplosion(SILValue v) {
|
|
return getLoweredValue(v).getSingletonExplosion(*this, v->getType());
|
|
}
|
|
|
|
LoweredBB &getLoweredBB(SILBasicBlock *bb) {
|
|
auto foundBB = LoweredBBs.find(bb);
|
|
assert(foundBB != LoweredBBs.end() && "no llvm bb for sil bb?!");
|
|
return foundBB->second;
|
|
}
|
|
|
|
StringRef getOrCreateAnonymousVarName(VarDecl *Decl) {
|
|
llvm::SmallString<4> &Name = AnonymousVariables[Decl];
|
|
if (Name.empty()) {
|
|
{
|
|
llvm::raw_svector_ostream S(Name);
|
|
S << '_' << NumAnonVars++;
|
|
}
|
|
AnonymousVariables.insert({Decl, Name});
|
|
}
|
|
return Name;
|
|
}
|
|
|
|
template <class DebugVarCarryingInst>
|
|
StringRef getVarName(DebugVarCarryingInst *i, bool &IsAnonymous) {
|
|
StringRef Name = i->getVarInfo().Name;
|
|
// The $match variables generated by the type checker are not
|
|
// guaranteed to be unique within their scope, but they have
|
|
// unique VarDecls.
|
|
if ((Name.empty() || Name == "$match") && i->getDecl()) {
|
|
IsAnonymous = true;
|
|
return getOrCreateAnonymousVarName(i->getDecl());
|
|
}
|
|
return Name;
|
|
}
|
|
|
|
/// At -Onone, forcibly keep all LLVM values that are tracked by
|
|
/// debug variables alive by inserting an empty inline assembler
|
|
/// expression depending on the value in the blocks dominated by the
|
|
/// value.
|
|
void emitDebugVariableRangeExtension(const SILBasicBlock *CurBB) {
|
|
if (IGM.IRGen.Opts.shouldOptimize())
|
|
return;
|
|
for (auto &Variable : ValueDomPoints) {
|
|
auto VarDominancePoint = Variable.second;
|
|
llvm::Value *Storage = Variable.first;
|
|
if (getActiveDominancePoint() == VarDominancePoint ||
|
|
isActiveDominancePointDominatedBy(VarDominancePoint)) {
|
|
llvm::Type *ArgTys;
|
|
auto *Ty = Storage->getType();
|
|
// Vectors, Pointers and Floats are expected to fit into a register.
|
|
if (Ty->isPointerTy() || Ty->isFloatingPointTy() || Ty->isVectorTy())
|
|
ArgTys = { Ty };
|
|
else {
|
|
// If this is not a scalar or vector type, we can't handle it.
|
|
if (isa<llvm::CompositeType>(Ty))
|
|
continue;
|
|
// The storage is guaranteed to be no larger than the register width.
|
|
// Extend the storage so it would fit into a register.
|
|
llvm::Type *IntTy;
|
|
switch (IGM.getClangASTContext().getTargetInfo().getRegisterWidth()) {
|
|
case 64: IntTy = IGM.Int64Ty; break;
|
|
case 32: IntTy = IGM.Int32Ty; break;
|
|
default: llvm_unreachable("unsupported register width");
|
|
}
|
|
ArgTys = { IntTy };
|
|
Storage = Builder.CreateZExtOrBitCast(Storage, IntTy);
|
|
}
|
|
// Emit an empty inline assembler expression depending on the register.
|
|
auto *AsmFnTy = llvm::FunctionType::get(IGM.VoidTy, ArgTys, false);
|
|
auto *InlineAsm = llvm::InlineAsm::get(AsmFnTy, "", "r", true);
|
|
Builder.CreateAsmCall(InlineAsm, Storage);
|
|
// Propagate the dbg.value intrinsics into the later basic blocks. Note
|
|
// that this shouldn't be necessary. LiveDebugValues should be doing
|
|
// this but can't in general because it currently only tracks register
|
|
// locations.
|
|
llvm::Instruction *Value = Variable.first;
|
|
auto It = llvm::BasicBlock::iterator(Value);
|
|
auto *BB = Value->getParent();
|
|
auto *CurBB = Builder.GetInsertBlock();
|
|
if (BB != CurBB)
|
|
for (auto I = std::next(It), E = BB->end(); I != E; ++I) {
|
|
auto *DVI = dyn_cast<llvm::DbgValueInst>(I);
|
|
if (DVI && DVI->getValue() == Value)
|
|
IGM.DebugInfo->getBuilder().insertDbgValueIntrinsic(
|
|
DVI->getValue(), DVI->getVariable(), DVI->getExpression(),
|
|
DVI->getDebugLoc(), &*CurBB->getFirstInsertionPt());
|
|
else
|
|
// Found all dbg.value intrinsics describing this location.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Account for bugs in LLVM.
|
|
///
|
|
/// - The LLVM type legalizer currently doesn't update debug
|
|
/// intrinsics when a large value is split up into smaller
|
|
/// pieces. Note that this heuristic as a bit too conservative
|
|
/// on 32-bit targets as it will also fire for doubles.
|
|
///
|
|
/// - CodeGen Prepare may drop dbg.values pointing to PHI instruction.
|
|
bool needsShadowCopy(llvm::Value *Storage) {
|
|
return (IGM.DataLayout.getTypeSizeInBits(Storage->getType()) >
|
|
IGM.getClangASTContext().getTargetInfo().getRegisterWidth()) ||
|
|
isa<llvm::PHINode>(Storage);
|
|
}
|
|
|
|
/// At -Onone, emit a shadow copy of an Address in an alloca, so the
|
|
/// register allocator doesn't elide the dbg.value intrinsic when
|
|
/// register pressure is high. There is a trade-off to this: With
|
|
/// shadow copies, we lose the precise lifetime.
|
|
llvm::Value *emitShadowCopy(llvm::Value *Storage, const SILDebugScope *Scope,
|
|
StringRef Name, unsigned ArgNo, bool IsAnonymous,
|
|
Alignment Align = Alignment(0)) {
|
|
auto Ty = Storage->getType();
|
|
// Never emit shadow copies when optimizing, or if already on the stack.
|
|
if (IGM.IRGen.Opts.shouldOptimize() || IsAnonymous ||
|
|
isa<llvm::AllocaInst>(Storage) || isa<llvm::UndefValue>(Storage) ||
|
|
Ty == IGM.RefCountedPtrTy) // No debug info is emitted for refcounts.
|
|
return Storage;
|
|
|
|
// Always emit shadow copies for function arguments.
|
|
if (ArgNo == 0)
|
|
// Otherwise only if debug value range extension is not feasible.
|
|
if (!needsShadowCopy(Storage)) {
|
|
// Mark for debug value range extension unless this is a constant.
|
|
if (auto *Value = dyn_cast<llvm::Instruction>(Storage))
|
|
if (ValueVariables.insert(Value).second)
|
|
ValueDomPoints.push_back({Value, getActiveDominancePoint()});
|
|
return Storage;
|
|
}
|
|
|
|
if (Align.isZero())
|
|
Align = IGM.getPointerAlignment();
|
|
|
|
auto &Alloca = ShadowStackSlots[{ArgNo, {Scope, Name}}];
|
|
if (!Alloca.isValid())
|
|
Alloca = createAlloca(Ty, Align, Name+".addr");
|
|
|
|
ArtificialLocation AutoRestore(Scope, IGM.DebugInfo, Builder);
|
|
Builder.CreateStore(Storage, Alloca.getAddress(), Align);
|
|
return Alloca.getAddress();
|
|
}
|
|
|
|
llvm::Value *emitShadowCopy(Address Storage, const SILDebugScope *Scope,
|
|
StringRef Name, unsigned ArgNo,
|
|
bool IsAnonymous) {
|
|
return emitShadowCopy(Storage.getAddress(), Scope, Name, ArgNo, IsAnonymous,
|
|
Storage.getAlignment());
|
|
}
|
|
|
|
void emitShadowCopy(ArrayRef<llvm::Value *> vals, const SILDebugScope *Scope,
|
|
StringRef Name, unsigned ArgNo, bool IsAnonymous,
|
|
llvm::SmallVectorImpl<llvm::Value *> ©) {
|
|
// Only do this at -O0.
|
|
if (IGM.IRGen.Opts.shouldOptimize() || IsAnonymous) {
|
|
copy.append(vals.begin(), vals.end());
|
|
return;
|
|
}
|
|
|
|
// Single or empty values.
|
|
if (vals.size() <= 1) {
|
|
for (auto val : vals)
|
|
copy.push_back(emitShadowCopy(val, Scope, Name, ArgNo, IsAnonymous));
|
|
return;
|
|
}
|
|
|
|
// Create a single aggregate alloca for explosions.
|
|
// TODO: why are we doing this instead of using the TypeInfo?
|
|
llvm::StructType *aggregateType = [&] {
|
|
SmallVector<llvm::Type *, 8> eltTypes;
|
|
for (auto val : vals)
|
|
eltTypes.push_back(val->getType());
|
|
return llvm::StructType::get(IGM.LLVMContext, eltTypes);
|
|
}();
|
|
|
|
auto layout = IGM.DataLayout.getStructLayout(aggregateType);
|
|
Alignment align(layout->getAlignment());
|
|
|
|
auto alloca = createAlloca(aggregateType, align, Name + ".debug");
|
|
ArtificialLocation AutoRestore(Scope, IGM.DebugInfo, Builder);
|
|
size_t i = 0;
|
|
for (auto val : vals) {
|
|
auto addr = Builder.CreateStructGEP(alloca, i,
|
|
Size(layout->getElementOffset(i)));
|
|
Builder.CreateStore(val, addr);
|
|
i++;
|
|
}
|
|
copy.push_back(alloca.getAddress());
|
|
}
|
|
|
|
/// Determine whether a generic variable has been inlined.
|
|
static bool isInlinedGeneric(VarDecl *VarDecl, const SILDebugScope *DS) {
|
|
if (!DS->InlinedCallSite)
|
|
return false;
|
|
if (VarDecl->hasType())
|
|
return VarDecl->getType()->hasArchetype();
|
|
return VarDecl->getInterfaceType()->hasTypeParameter();
|
|
}
|
|
|
|
/// Emit debug info for a function argument or a local variable.
|
|
template <typename StorageType>
|
|
void emitDebugVariableDeclaration(StorageType Storage,
|
|
DebugTypeInfo Ty,
|
|
SILType SILTy,
|
|
const SILDebugScope *DS,
|
|
VarDecl *VarDecl,
|
|
StringRef Name,
|
|
unsigned ArgNo = 0,
|
|
IndirectionKind Indirection = DirectValue) {
|
|
// Force all archetypes referenced by the type to be bound by this point.
|
|
// TODO: just make sure that we have a path to them that the debug info
|
|
// can follow.
|
|
|
|
// FIXME: The debug info type of all inlined instances of a variable must be
|
|
// the same as the type of the abstract variable.
|
|
if (isInlinedGeneric(VarDecl, DS))
|
|
return;
|
|
|
|
auto runtimeTy = getRuntimeReifiedType(IGM,
|
|
Ty.getType()->getCanonicalType());
|
|
if (!IGM.IRGen.Opts.shouldOptimize() && runtimeTy->hasArchetype())
|
|
runtimeTy.visit([&](CanType t) {
|
|
if (auto archetype = dyn_cast<ArchetypeType>(t))
|
|
emitTypeMetadataRef(archetype);
|
|
});
|
|
|
|
assert(IGM.DebugInfo && "debug info not enabled");
|
|
if (ArgNo) {
|
|
PrologueLocation AutoRestore(IGM.DebugInfo, Builder);
|
|
IGM.DebugInfo->emitVariableDeclaration(Builder, Storage, Ty, DS, VarDecl,
|
|
Name, ArgNo, Indirection);
|
|
} else
|
|
IGM.DebugInfo->emitVariableDeclaration(Builder, Storage, Ty, DS, VarDecl,
|
|
Name, 0, Indirection);
|
|
}
|
|
|
|
void emitFailBB() {
|
|
if (!FailBBs.empty()) {
|
|
// Move the trap basic blocks to the end of the function.
|
|
for (auto *FailBB : FailBBs) {
|
|
auto &BlockList = CurFn->getBasicBlockList();
|
|
BlockList.splice(BlockList.end(), BlockList, FailBB);
|
|
}
|
|
}
|
|
}
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
// SIL instruction lowering
|
|
//===--------------------------------------------------------------------===//
|
|
|
|
void visitSILBasicBlock(SILBasicBlock *BB);
|
|
|
|
void emitErrorResultVar(SILResultInfo ErrorInfo, DebugValueInst *DbgValue);
|
|
void emitDebugInfoForAllocStack(AllocStackInst *i, const TypeInfo &type,
|
|
llvm::Value *addr);
|
|
void visitAllocStackInst(AllocStackInst *i);
|
|
void visitAllocRefInst(AllocRefInst *i);
|
|
void visitAllocRefDynamicInst(AllocRefDynamicInst *i);
|
|
void visitAllocBoxInst(AllocBoxInst *i);
|
|
|
|
void visitProjectBoxInst(ProjectBoxInst *i);
|
|
|
|
void visitApplyInst(ApplyInst *i);
|
|
void visitTryApplyInst(TryApplyInst *i);
|
|
void visitFullApplySite(FullApplySite i);
|
|
void visitPartialApplyInst(PartialApplyInst *i);
|
|
void visitBuiltinInst(BuiltinInst *i);
|
|
|
|
void visitFunctionRefInst(FunctionRefInst *i);
|
|
void visitAllocGlobalInst(AllocGlobalInst *i);
|
|
void visitGlobalAddrInst(GlobalAddrInst *i);
|
|
void visitGlobalValueInst(GlobalValueInst *i);
|
|
|
|
void visitIntegerLiteralInst(IntegerLiteralInst *i);
|
|
void visitFloatLiteralInst(FloatLiteralInst *i);
|
|
void visitStringLiteralInst(StringLiteralInst *i);
|
|
void visitConstStringLiteralInst(ConstStringLiteralInst *i);
|
|
|
|
void visitLoadInst(LoadInst *i);
|
|
void visitStoreInst(StoreInst *i);
|
|
void visitAssignInst(AssignInst *i) {
|
|
llvm_unreachable("assign is not valid in canonical SIL");
|
|
}
|
|
void visitMarkUninitializedInst(MarkUninitializedInst *i) {
|
|
llvm_unreachable("mark_uninitialized is not valid in canonical SIL");
|
|
}
|
|
void visitMarkUninitializedBehaviorInst(MarkUninitializedBehaviorInst *i) {
|
|
llvm_unreachable("mark_uninitialized_behavior is not valid in canonical SIL");
|
|
}
|
|
void visitMarkFunctionEscapeInst(MarkFunctionEscapeInst *i) {
|
|
llvm_unreachable("mark_function_escape is not valid in canonical SIL");
|
|
}
|
|
void visitLoadBorrowInst(LoadBorrowInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitDebugValueInst(DebugValueInst *i);
|
|
void visitDebugValueAddrInst(DebugValueAddrInst *i);
|
|
void visitLoadWeakInst(LoadWeakInst *i);
|
|
void visitStoreWeakInst(StoreWeakInst *i);
|
|
void visitRetainValueInst(RetainValueInst *i);
|
|
void visitRetainValueAddrInst(RetainValueAddrInst *i);
|
|
void visitCopyValueInst(CopyValueInst *i);
|
|
void visitCopyUnownedValueInst(CopyUnownedValueInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitReleaseValueInst(ReleaseValueInst *i);
|
|
void visitReleaseValueAddrInst(ReleaseValueAddrInst *i);
|
|
void visitDestroyValueInst(DestroyValueInst *i);
|
|
void visitAutoreleaseValueInst(AutoreleaseValueInst *i);
|
|
void visitSetDeallocatingInst(SetDeallocatingInst *i);
|
|
void visitObjectInst(ObjectInst *i) {
|
|
llvm_unreachable("object instruction cannot appear in a function");
|
|
}
|
|
void visitStructInst(StructInst *i);
|
|
void visitTupleInst(TupleInst *i);
|
|
void visitEnumInst(EnumInst *i);
|
|
void visitInitEnumDataAddrInst(InitEnumDataAddrInst *i);
|
|
void visitSelectEnumInst(SelectEnumInst *i);
|
|
void visitSelectEnumAddrInst(SelectEnumAddrInst *i);
|
|
void visitSelectValueInst(SelectValueInst *i);
|
|
void visitUncheckedEnumDataInst(UncheckedEnumDataInst *i);
|
|
void visitUncheckedTakeEnumDataAddrInst(UncheckedTakeEnumDataAddrInst *i);
|
|
void visitInjectEnumAddrInst(InjectEnumAddrInst *i);
|
|
void visitObjCProtocolInst(ObjCProtocolInst *i);
|
|
void visitMetatypeInst(MetatypeInst *i);
|
|
void visitValueMetatypeInst(ValueMetatypeInst *i);
|
|
void visitExistentialMetatypeInst(ExistentialMetatypeInst *i);
|
|
void visitTupleExtractInst(TupleExtractInst *i);
|
|
void visitDestructureTupleInst(DestructureTupleInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitDestructureStructInst(DestructureStructInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitTupleElementAddrInst(TupleElementAddrInst *i);
|
|
void visitStructExtractInst(StructExtractInst *i);
|
|
void visitStructElementAddrInst(StructElementAddrInst *i);
|
|
void visitRefElementAddrInst(RefElementAddrInst *i);
|
|
void visitRefTailAddrInst(RefTailAddrInst *i);
|
|
|
|
void visitClassMethodInst(ClassMethodInst *i);
|
|
void visitSuperMethodInst(SuperMethodInst *i);
|
|
void visitObjCMethodInst(ObjCMethodInst *i);
|
|
void visitObjCSuperMethodInst(ObjCSuperMethodInst *i);
|
|
void visitWitnessMethodInst(WitnessMethodInst *i);
|
|
|
|
void visitAllocValueBufferInst(AllocValueBufferInst *i);
|
|
void visitProjectValueBufferInst(ProjectValueBufferInst *i);
|
|
void visitDeallocValueBufferInst(DeallocValueBufferInst *i);
|
|
|
|
void visitOpenExistentialAddrInst(OpenExistentialAddrInst *i);
|
|
void visitOpenExistentialMetatypeInst(OpenExistentialMetatypeInst *i);
|
|
void visitOpenExistentialRefInst(OpenExistentialRefInst *i);
|
|
void visitOpenExistentialValueInst(OpenExistentialValueInst *i);
|
|
void visitInitExistentialAddrInst(InitExistentialAddrInst *i);
|
|
void visitInitExistentialValueInst(InitExistentialValueInst *i);
|
|
void visitInitExistentialMetatypeInst(InitExistentialMetatypeInst *i);
|
|
void visitInitExistentialRefInst(InitExistentialRefInst *i);
|
|
void visitDeinitExistentialAddrInst(DeinitExistentialAddrInst *i);
|
|
void visitDeinitExistentialValueInst(DeinitExistentialValueInst *i);
|
|
|
|
void visitAllocExistentialBoxInst(AllocExistentialBoxInst *i);
|
|
void visitOpenExistentialBoxInst(OpenExistentialBoxInst *i);
|
|
void visitOpenExistentialBoxValueInst(OpenExistentialBoxValueInst *i);
|
|
void visitProjectExistentialBoxInst(ProjectExistentialBoxInst *i);
|
|
void visitDeallocExistentialBoxInst(DeallocExistentialBoxInst *i);
|
|
|
|
void visitProjectBlockStorageInst(ProjectBlockStorageInst *i);
|
|
void visitInitBlockStorageHeaderInst(InitBlockStorageHeaderInst *i);
|
|
|
|
void visitFixLifetimeInst(FixLifetimeInst *i);
|
|
void visitEndLifetimeInst(EndLifetimeInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void
|
|
visitUncheckedOwnershipConversionInst(UncheckedOwnershipConversionInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitBeginBorrowInst(BeginBorrowInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitEndBorrowInst(EndBorrowInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitEndBorrowArgumentInst(EndBorrowArgumentInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitStoreBorrowInst(StoreBorrowInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitBeginAccessInst(BeginAccessInst *i);
|
|
void visitEndAccessInst(EndAccessInst *i);
|
|
void visitBeginUnpairedAccessInst(BeginUnpairedAccessInst *i);
|
|
void visitEndUnpairedAccessInst(EndUnpairedAccessInst *i);
|
|
void visitUnmanagedRetainValueInst(UnmanagedRetainValueInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitUnmanagedReleaseValueInst(UnmanagedReleaseValueInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitUnmanagedAutoreleaseValueInst(UnmanagedAutoreleaseValueInst *i) {
|
|
llvm_unreachable("unimplemented");
|
|
}
|
|
void visitMarkDependenceInst(MarkDependenceInst *i);
|
|
void visitCopyBlockInst(CopyBlockInst *i);
|
|
void visitStrongPinInst(StrongPinInst *i);
|
|
void visitStrongUnpinInst(StrongUnpinInst *i);
|
|
void visitStrongRetainInst(StrongRetainInst *i);
|
|
void visitStrongReleaseInst(StrongReleaseInst *i);
|
|
void visitStrongRetainUnownedInst(StrongRetainUnownedInst *i);
|
|
void visitUnownedRetainInst(UnownedRetainInst *i);
|
|
void visitUnownedReleaseInst(UnownedReleaseInst *i);
|
|
void visitLoadUnownedInst(LoadUnownedInst *i);
|
|
void visitStoreUnownedInst(StoreUnownedInst *i);
|
|
void visitIsUniqueInst(IsUniqueInst *i);
|
|
void visitIsUniqueOrPinnedInst(IsUniqueOrPinnedInst *i);
|
|
void visitDeallocStackInst(DeallocStackInst *i);
|
|
void visitDeallocBoxInst(DeallocBoxInst *i);
|
|
void visitDeallocRefInst(DeallocRefInst *i);
|
|
void visitDeallocPartialRefInst(DeallocPartialRefInst *i);
|
|
|
|
void visitCopyAddrInst(CopyAddrInst *i);
|
|
void visitDestroyAddrInst(DestroyAddrInst *i);
|
|
|
|
void visitBindMemoryInst(BindMemoryInst *i);
|
|
|
|
void visitCondFailInst(CondFailInst *i);
|
|
|
|
void visitConvertFunctionInst(ConvertFunctionInst *i);
|
|
void visitThinFunctionToPointerInst(ThinFunctionToPointerInst *i);
|
|
void visitPointerToThinFunctionInst(PointerToThinFunctionInst *i);
|
|
void visitUpcastInst(UpcastInst *i);
|
|
void visitAddressToPointerInst(AddressToPointerInst *i);
|
|
void visitPointerToAddressInst(PointerToAddressInst *i);
|
|
void visitUncheckedRefCastInst(UncheckedRefCastInst *i);
|
|
void visitUncheckedRefCastAddrInst(UncheckedRefCastAddrInst *i);
|
|
void visitUncheckedAddrCastInst(UncheckedAddrCastInst *i);
|
|
void visitUncheckedTrivialBitCastInst(UncheckedTrivialBitCastInst *i);
|
|
void visitUncheckedBitwiseCastInst(UncheckedBitwiseCastInst *i);
|
|
void visitRefToRawPointerInst(RefToRawPointerInst *i);
|
|
void visitRawPointerToRefInst(RawPointerToRefInst *i);
|
|
void visitRefToUnownedInst(RefToUnownedInst *i);
|
|
void visitUnownedToRefInst(UnownedToRefInst *i);
|
|
void visitRefToUnmanagedInst(RefToUnmanagedInst *i);
|
|
void visitUnmanagedToRefInst(UnmanagedToRefInst *i);
|
|
void visitThinToThickFunctionInst(ThinToThickFunctionInst *i);
|
|
void visitThickToObjCMetatypeInst(ThickToObjCMetatypeInst *i);
|
|
void visitObjCToThickMetatypeInst(ObjCToThickMetatypeInst *i);
|
|
void visitUnconditionalCheckedCastInst(UnconditionalCheckedCastInst *i);
|
|
void visitUnconditionalCheckedCastAddrInst(UnconditionalCheckedCastAddrInst *i);
|
|
void
|
|
visitUnconditionalCheckedCastValueInst(UnconditionalCheckedCastValueInst *i);
|
|
void visitObjCMetatypeToObjectInst(ObjCMetatypeToObjectInst *i);
|
|
void visitObjCExistentialMetatypeToObjectInst(
|
|
ObjCExistentialMetatypeToObjectInst *i);
|
|
void visitRefToBridgeObjectInst(RefToBridgeObjectInst *i);
|
|
void visitBridgeObjectToRefInst(BridgeObjectToRefInst *i);
|
|
void visitBridgeObjectToWordInst(BridgeObjectToWordInst *i);
|
|
|
|
void visitIndexAddrInst(IndexAddrInst *i);
|
|
void visitTailAddrInst(TailAddrInst *i);
|
|
void visitIndexRawPointerInst(IndexRawPointerInst *i);
|
|
|
|
void visitBeginApplyInst(BeginApplyInst *i);
|
|
void visitEndApplyInst(EndApplyInst *i);
|
|
void visitAbortApplyInst(AbortApplyInst *i);
|
|
|
|
void visitUnreachableInst(UnreachableInst *i);
|
|
void visitBranchInst(BranchInst *i);
|
|
void visitCondBranchInst(CondBranchInst *i);
|
|
void visitReturnInst(ReturnInst *i);
|
|
void visitThrowInst(ThrowInst *i);
|
|
void visitUnwindInst(UnwindInst *i);
|
|
void visitYieldInst(YieldInst *i);
|
|
void visitSwitchValueInst(SwitchValueInst *i);
|
|
void visitSwitchEnumInst(SwitchEnumInst *i);
|
|
void visitSwitchEnumAddrInst(SwitchEnumAddrInst *i);
|
|
void visitDynamicMethodBranchInst(DynamicMethodBranchInst *i);
|
|
void visitCheckedCastBranchInst(CheckedCastBranchInst *i);
|
|
void visitCheckedCastValueBranchInst(CheckedCastValueBranchInst *i);
|
|
void visitCheckedCastAddrBranchInst(CheckedCastAddrBranchInst *i);
|
|
|
|
void visitKeyPathInst(KeyPathInst *I);
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
void LoweredValue::getExplosion(IRGenFunction &IGF, SILType type,
|
|
Explosion &ex) const {
|
|
switch (kind) {
|
|
case Kind::StackAddress:
|
|
case Kind::ContainedAddress:
|
|
case Kind::DynamicallyEnforcedAddress:
|
|
llvm_unreachable("not a value");
|
|
|
|
case Kind::ExplosionVector:
|
|
ex.add(Storage.get<ExplosionVector>(kind));
|
|
return;
|
|
|
|
case Kind::SingletonExplosion:
|
|
ex.add(Storage.get<SingletonExplosion>(kind));
|
|
return;
|
|
|
|
case Kind::EmptyExplosion:
|
|
return;
|
|
|
|
case Kind::OwnedAddress:
|
|
ex.add(Storage.get<OwnedAddress>(kind).getOwner());
|
|
return;
|
|
|
|
case Kind::FunctionPointer:
|
|
ex.add(Storage.get<FunctionPointer>(kind)
|
|
.getExplosionValue(IGF, type.castTo<SILFunctionType>()));
|
|
return;
|
|
|
|
case Kind::ObjCMethod:
|
|
ex.add(Storage.get<ObjCMethod>(kind).getExplosionValue(IGF));
|
|
return;
|
|
}
|
|
llvm_unreachable("bad kind");
|
|
}
|
|
|
|
llvm::Value *LoweredValue::getSingletonExplosion(IRGenFunction &IGF,
|
|
SILType type) const {
|
|
switch (kind) {
|
|
case Kind::StackAddress:
|
|
case Kind::ContainedAddress:
|
|
case Kind::DynamicallyEnforcedAddress:
|
|
llvm_unreachable("not a value");
|
|
|
|
case Kind::EmptyExplosion:
|
|
case Kind::ExplosionVector:
|
|
llvm_unreachable("not a singleton explosion");
|
|
|
|
case Kind::SingletonExplosion:
|
|
return Storage.get<SingletonExplosion>(kind);
|
|
|
|
case Kind::OwnedAddress:
|
|
return Storage.get<OwnedAddress>(kind).getOwner();
|
|
|
|
case Kind::FunctionPointer:
|
|
return Storage.get<FunctionPointer>(kind)
|
|
.getExplosionValue(IGF, type.castTo<SILFunctionType>());
|
|
|
|
case Kind::ObjCMethod:
|
|
return Storage.get<ObjCMethod>(kind).getExplosionValue(IGF);
|
|
}
|
|
llvm_unreachable("bad kind");
|
|
}
|
|
|
|
IRGenSILFunction::IRGenSILFunction(IRGenModule &IGM,
|
|
SILFunction *f)
|
|
: IRGenFunction(IGM, IGM.getAddrOfSILFunction(f, ForDefinition),
|
|
f->getOptimizationMode(),
|
|
f->getDebugScope(), f->getLocation()),
|
|
CurSILFn(f) {
|
|
// Apply sanitizer attributes to the function.
|
|
// TODO: Check if the function is supposed to be excluded from ASan either by
|
|
// being in the external file or via annotations.
|
|
if (IGM.IRGen.Opts.Sanitizers & SanitizerKind::Address)
|
|
CurFn->addFnAttr(llvm::Attribute::SanitizeAddress);
|
|
if (IGM.IRGen.Opts.Sanitizers & SanitizerKind::Thread) {
|
|
auto declContext = f->getDeclContext();
|
|
if (declContext && isa<DestructorDecl>(declContext))
|
|
// Do not report races in deinit and anything called from it
|
|
// because TSan does not observe synchronization between retain
|
|
// count dropping to '0' and the object deinitialization.
|
|
CurFn->addFnAttr("sanitize_thread_no_checking_at_run_time");
|
|
else
|
|
CurFn->addFnAttr(llvm::Attribute::SanitizeThread);
|
|
}
|
|
}
|
|
|
|
IRGenSILFunction::~IRGenSILFunction() {
|
|
assert(Builder.hasPostTerminatorIP() && "did not terminate BB?!");
|
|
// Emit the fail BB if we have one.
|
|
if (!FailBBs.empty())
|
|
emitFailBB();
|
|
DEBUG(CurFn->print(llvm::dbgs()));
|
|
}
|
|
|
|
template<typename ValueVector>
|
|
static void emitPHINodesForType(IRGenSILFunction &IGF, SILType type,
|
|
const TypeInfo &ti, unsigned predecessors,
|
|
ValueVector &phis) {
|
|
if (type.isAddress()) {
|
|
phis.push_back(IGF.Builder.CreatePHI(ti.getStorageType()->getPointerTo(),
|
|
predecessors));
|
|
} else {
|
|
// PHIs are always emitted with maximal explosion.
|
|
ExplosionSchema schema = ti.getSchema();
|
|
for (auto &elt : schema) {
|
|
if (elt.isScalar())
|
|
phis.push_back(
|
|
IGF.Builder.CreatePHI(elt.getScalarType(), predecessors));
|
|
else
|
|
phis.push_back(
|
|
IGF.Builder.CreatePHI(elt.getAggregateType()->getPointerTo(),
|
|
predecessors));
|
|
}
|
|
}
|
|
}
|
|
|
|
static PHINodeVector
|
|
emitPHINodesForBBArgs(IRGenSILFunction &IGF,
|
|
SILBasicBlock *silBB,
|
|
llvm::BasicBlock *llBB) {
|
|
PHINodeVector phis;
|
|
unsigned predecessors = std::distance(silBB->pred_begin(), silBB->pred_end());
|
|
|
|
IGF.Builder.SetInsertPoint(llBB);
|
|
if (IGF.IGM.DebugInfo) {
|
|
// Use the location of the first instruction in the basic block
|
|
// for the φ-nodes.
|
|
if (!silBB->empty()) {
|
|
SILInstruction &I = *silBB->begin();
|
|
auto DS = I.getDebugScope();
|
|
assert(DS);
|
|
IGF.IGM.DebugInfo->setCurrentLoc(IGF.Builder, DS, I.getLoc());
|
|
}
|
|
}
|
|
|
|
for (SILArgument *arg : make_range(silBB->args_begin(), silBB->args_end())) {
|
|
size_t first = phis.size();
|
|
|
|
const TypeInfo &ti = IGF.getTypeInfo(arg->getType());
|
|
|
|
emitPHINodesForType(IGF, arg->getType(), ti, predecessors, phis);
|
|
if (arg->getType().isAddress()) {
|
|
IGF.setLoweredAddress(arg,
|
|
ti.getAddressForPointer(phis.back()));
|
|
} else {
|
|
Explosion argValue;
|
|
for (llvm::PHINode *phi :
|
|
swift::make_range(phis.begin()+first, phis.end()))
|
|
argValue.add(phi);
|
|
IGF.setLoweredExplosion(arg, argValue);
|
|
}
|
|
}
|
|
|
|
// Since we return to the entry of the function, reset the location.
|
|
if (IGF.IGM.DebugInfo)
|
|
IGF.IGM.DebugInfo->clearLoc(IGF.Builder);
|
|
|
|
return phis;
|
|
}
|
|
|
|
static void addIncomingExplosionToPHINodes(IRGenSILFunction &IGF,
|
|
LoweredBB &lbb,
|
|
unsigned &phiIndex,
|
|
Explosion &argValue);
|
|
|
|
// TODO: Handle this during SIL AddressLowering.
|
|
static ArrayRef<SILArgument*> emitEntryPointIndirectReturn(
|
|
IRGenSILFunction &IGF,
|
|
SILBasicBlock *entry,
|
|
Explosion ¶ms,
|
|
CanSILFunctionType funcTy,
|
|
llvm::function_ref<bool(SILType)> requiresIndirectResult) {
|
|
// Map an indirect return for a type SIL considers loadable but still
|
|
// requires an indirect return at the IR level.
|
|
SILFunctionConventions fnConv(funcTy, IGF.getSILModule());
|
|
SILType directResultType =
|
|
IGF.CurSILFn->mapTypeIntoContext(fnConv.getSILResultType());
|
|
if (requiresIndirectResult(directResultType)) {
|
|
auto &retTI = IGF.IGM.getTypeInfo(directResultType);
|
|
IGF.IndirectReturn = retTI.getAddressForPointer(params.claimNext());
|
|
}
|
|
|
|
auto bbargs = entry->getArguments();
|
|
|
|
// Map the indirect returns if present.
|
|
unsigned numIndirectResults = fnConv.getNumIndirectSILResults();
|
|
for (unsigned i = 0; i != numIndirectResults; ++i) {
|
|
SILArgument *ret = bbargs[i];
|
|
auto &retTI = IGF.IGM.getTypeInfo(ret->getType());
|
|
IGF.setLoweredAddress(ret, retTI.getAddressForPointer(params.claimNext()));
|
|
}
|
|
|
|
return bbargs.slice(numIndirectResults);
|
|
}
|
|
|
|
static void bindParameter(IRGenSILFunction &IGF,
|
|
SILArgument *param,
|
|
Explosion &allParamValues) {
|
|
// Pull out the parameter value and its formal type.
|
|
auto ¶mTI = IGF.getTypeInfo(param->getType());
|
|
|
|
// If the SIL parameter isn't passed indirectly, we need to map it
|
|
// to an explosion.
|
|
if (param->getType().isObject()) {
|
|
Explosion paramValues;
|
|
auto &loadableTI = cast<LoadableTypeInfo>(paramTI);
|
|
// If the explosion must be passed indirectly, load the value from the
|
|
// indirect address.
|
|
auto &nativeSchema = paramTI.nativeParameterValueSchema(IGF.IGM);
|
|
if (nativeSchema.requiresIndirect()) {
|
|
Address paramAddr
|
|
= loadableTI.getAddressForPointer(allParamValues.claimNext());
|
|
loadableTI.loadAsTake(IGF, paramAddr, paramValues);
|
|
} else {
|
|
if (!nativeSchema.empty()) {
|
|
// Otherwise, we map from the native convention to the type's explosion
|
|
// schema.
|
|
Explosion nativeParam;
|
|
allParamValues.transferInto(nativeParam, nativeSchema.size());
|
|
paramValues = nativeSchema.mapFromNative(IGF.IGM, IGF, nativeParam,
|
|
param->getType());
|
|
} else {
|
|
assert(paramTI.getSchema().empty());
|
|
}
|
|
}
|
|
IGF.setLoweredExplosion(param, paramValues);
|
|
return;
|
|
}
|
|
|
|
// Okay, the type is passed indirectly in SIL, so we need to map
|
|
// it to an address.
|
|
// FIXME: that doesn't mean we should physically pass it
|
|
// indirectly at this resilience expansion. An @in or @in_guaranteed parameter
|
|
// could be passed by value in the right resilience domain.
|
|
Address paramAddr
|
|
= paramTI.getAddressForPointer(allParamValues.claimNext());
|
|
IGF.setLoweredAddress(param, paramAddr);
|
|
}
|
|
|
|
/// Emit entry point arguments for a SILFunction with the Swift calling
|
|
/// convention.
|
|
static void emitEntryPointArgumentsNativeCC(IRGenSILFunction &IGF,
|
|
SILBasicBlock *entry,
|
|
Explosion &allParamValues) {
|
|
auto funcTy = IGF.CurSILFn->getLoweredFunctionType();
|
|
|
|
// Map the indirect return if present.
|
|
ArrayRef<SILArgument *> params = emitEntryPointIndirectReturn(
|
|
IGF, entry, allParamValues, funcTy, [&](SILType retType) -> bool {
|
|
auto &schema =
|
|
IGF.IGM.getTypeInfo(retType).nativeReturnValueSchema(IGF.IGM);
|
|
return schema.requiresIndirect();
|
|
});
|
|
|
|
// The witness method CC passes Self as a final argument.
|
|
WitnessMetadata witnessMetadata;
|
|
if (funcTy->getRepresentation() == SILFunctionTypeRepresentation::WitnessMethod) {
|
|
collectTrailingWitnessMetadata(IGF, *IGF.CurSILFn, allParamValues,
|
|
witnessMetadata);
|
|
}
|
|
|
|
// Bind the error result by popping it off the parameter list.
|
|
if (funcTy->hasErrorResult()) {
|
|
IGF.setErrorResultSlot(allParamValues.takeLast());
|
|
}
|
|
|
|
// The 'self' argument might be in the context position, which is
|
|
// now the end of the parameter list. Bind it now.
|
|
if (hasSelfContextParameter(funcTy)) {
|
|
SILArgument *selfParam = params.back();
|
|
params = params.drop_back();
|
|
|
|
Explosion selfTemp;
|
|
selfTemp.add(allParamValues.takeLast());
|
|
bindParameter(IGF, selfParam, selfTemp);
|
|
|
|
// Even if we don't have a 'self', if we have an error result, we
|
|
// should have a placeholder argument here.
|
|
} else if (funcTy->hasErrorResult() ||
|
|
funcTy->getRepresentation() == SILFunctionTypeRepresentation::Thick)
|
|
{
|
|
llvm::Value *contextPtr = allParamValues.takeLast(); (void) contextPtr;
|
|
assert(contextPtr->getType() == IGF.IGM.RefCountedPtrTy);
|
|
}
|
|
|
|
// Map the remaining SIL parameters to LLVM parameters.
|
|
for (SILArgument *param : params) {
|
|
bindParameter(IGF, param, allParamValues);
|
|
}
|
|
|
|
// Bind polymorphic arguments. This can only be done after binding
|
|
// all the value parameters.
|
|
if (hasPolymorphicParameters(funcTy)) {
|
|
emitPolymorphicParameters(IGF, *IGF.CurSILFn, allParamValues,
|
|
&witnessMetadata,
|
|
[&](unsigned paramIndex) -> llvm::Value* {
|
|
SILValue parameter =
|
|
IGF.CurSILFn->getArgumentsWithoutIndirectResults()[paramIndex];
|
|
return IGF.getLoweredSingletonExplosion(parameter);
|
|
});
|
|
}
|
|
|
|
assert(allParamValues.empty() && "didn't claim all parameters!");
|
|
}
|
|
|
|
/// Emit entry point arguments for the parameters of a C function, or the
|
|
/// method parameters of an ObjC method.
|
|
static void emitEntryPointArgumentsCOrObjC(IRGenSILFunction &IGF,
|
|
SILBasicBlock *entry,
|
|
Explosion ¶ms,
|
|
CanSILFunctionType funcTy) {
|
|
// First, lower the method type.
|
|
ForeignFunctionInfo foreignInfo = IGF.IGM.getForeignFunctionInfo(funcTy);
|
|
assert(foreignInfo.ClangInfo);
|
|
auto &FI = *foreignInfo.ClangInfo;
|
|
|
|
// Okay, start processing the parameters explosion.
|
|
|
|
// First, claim all the indirect results.
|
|
ArrayRef<SILArgument*> args
|
|
= emitEntryPointIndirectReturn(IGF, entry, params, funcTy,
|
|
[&](SILType directResultType) -> bool {
|
|
return FI.getReturnInfo().isIndirect();
|
|
});
|
|
|
|
unsigned nextArgTyIdx = 0;
|
|
|
|
// Handle the arguments of an ObjC method.
|
|
if (IGF.CurSILFn->getRepresentation() ==
|
|
SILFunctionTypeRepresentation::ObjCMethod) {
|
|
// Claim the self argument from the end of the formal arguments.
|
|
SILArgument *selfArg = args.back();
|
|
args = args.slice(0, args.size() - 1);
|
|
|
|
// Set the lowered explosion for the self argument.
|
|
auto &selfTI = cast<LoadableTypeInfo>(IGF.getTypeInfo(selfArg->getType()));
|
|
auto selfSchema = selfTI.getSchema();
|
|
assert(selfSchema.size() == 1 && "Expected self to be a single element!");
|
|
|
|
auto *selfValue = params.claimNext();
|
|
auto *bodyType = selfSchema.begin()->getScalarType();
|
|
if (selfValue->getType() != bodyType)
|
|
selfValue = IGF.coerceValue(selfValue, bodyType, IGF.IGM.DataLayout);
|
|
|
|
Explosion self;
|
|
self.add(selfValue);
|
|
IGF.setLoweredExplosion(selfArg, self);
|
|
|
|
// Discard the implicit _cmd argument.
|
|
params.claimNext();
|
|
|
|
// We've handled the self and _cmd arguments, so when we deal with
|
|
// generating explosions for the remaining arguments we can skip
|
|
// these.
|
|
nextArgTyIdx = 2;
|
|
}
|
|
|
|
assert(args.size() == (FI.arg_size() - nextArgTyIdx) &&
|
|
"Number of arguments not equal to number of argument types!");
|
|
|
|
// Generate lowered explosions for each explicit argument.
|
|
for (auto i : indices(args)) {
|
|
SILArgument *arg = args[i];
|
|
auto argTyIdx = i + nextArgTyIdx;
|
|
auto &argTI = IGF.getTypeInfo(arg->getType());
|
|
|
|
// Bitcast indirect argument pointers to the right storage type.
|
|
if (arg->getType().isAddress()) {
|
|
llvm::Value *ptr = params.claimNext();
|
|
ptr = IGF.Builder.CreateBitCast(ptr,
|
|
argTI.getStorageType()->getPointerTo());
|
|
IGF.setLoweredAddress(arg, Address(ptr, argTI.getBestKnownAlignment()));
|
|
continue;
|
|
}
|
|
|
|
auto &loadableArgTI = cast<LoadableTypeInfo>(argTI);
|
|
|
|
Explosion argExplosion;
|
|
emitForeignParameter(IGF, params, foreignInfo, argTyIdx, arg->getType(),
|
|
loadableArgTI, argExplosion, false);
|
|
IGF.setLoweredExplosion(arg, argExplosion);
|
|
}
|
|
|
|
assert(params.empty() && "didn't claim all parameters!");
|
|
|
|
// emitPolymorphicParameters() may create function calls, so we need
|
|
// to initialize the debug location here.
|
|
ArtificialLocation Loc(IGF.getDebugScope(), IGF.IGM.DebugInfo, IGF.Builder);
|
|
|
|
// Bind polymorphic arguments. This can only be done after binding
|
|
// all the value parameters, and must be done even for non-polymorphic
|
|
// functions because of imported Objective-C generics.
|
|
emitPolymorphicParameters(
|
|
IGF, *IGF.CurSILFn, params, nullptr,
|
|
[&](unsigned paramIndex) -> llvm::Value * {
|
|
SILValue parameter = entry->getArguments()[paramIndex];
|
|
return IGF.getLoweredSingletonExplosion(parameter);
|
|
});
|
|
}
|
|
|
|
/// Get metadata for the dynamic Self type if we have it.
|
|
static void emitLocalSelfMetadata(IRGenSILFunction &IGF) {
|
|
if (!IGF.CurSILFn->hasSelfMetadataParam())
|
|
return;
|
|
|
|
const SILArgument *selfArg = IGF.CurSILFn->getSelfMetadataArgument();
|
|
CanMetatypeType metaTy =
|
|
dyn_cast<MetatypeType>(selfArg->getType().getSwiftRValueType());
|
|
IRGenFunction::LocalSelfKind selfKind;
|
|
if (!metaTy)
|
|
selfKind = IRGenFunction::ObjectReference;
|
|
else switch (metaTy->getRepresentation()) {
|
|
case MetatypeRepresentation::Thin:
|
|
llvm_unreachable("class metatypes are never thin");
|
|
case MetatypeRepresentation::Thick:
|
|
selfKind = IRGenFunction::SwiftMetatype;
|
|
break;
|
|
case MetatypeRepresentation::ObjC:
|
|
selfKind = IRGenFunction::ObjCMetatype;
|
|
break;
|
|
}
|
|
llvm::Value *value = IGF.getLoweredExplosion(selfArg).claimNext();
|
|
IGF.setLocalSelfMetadata(value, selfKind);
|
|
}
|
|
|
|
/// Emit the definition for the given SIL constant.
|
|
void IRGenModule::emitSILFunction(SILFunction *f) {
|
|
if (f->isExternalDeclaration())
|
|
return;
|
|
|
|
// Do not emit bodies of public_external functions.
|
|
if (hasPublicVisibility(f->getLinkage()) && f->isAvailableExternally())
|
|
return;
|
|
|
|
PrettyStackTraceSILFunction stackTrace("emitting IR", f);
|
|
IRGenSILFunction(*this, f).emitSILFunction();
|
|
}
|
|
|
|
void IRGenSILFunction::emitSILFunction() {
|
|
DEBUG(llvm::dbgs() << "emitting SIL function: ";
|
|
CurSILFn->printName(llvm::dbgs());
|
|
llvm::dbgs() << '\n';
|
|
CurSILFn->print(llvm::dbgs()));
|
|
|
|
assert(!CurSILFn->empty() && "function has no basic blocks?!");
|
|
|
|
// Configure the dominance resolver.
|
|
// TODO: consider re-using a dom analysis from the PassManager
|
|
// TODO: consider using a cheaper analysis at -O0
|
|
setDominanceResolver([](IRGenFunction &IGF_,
|
|
DominancePoint activePoint,
|
|
DominancePoint dominatingPoint) -> bool {
|
|
IRGenSILFunction &IGF = static_cast<IRGenSILFunction&>(IGF_);
|
|
if (!IGF.Dominance) {
|
|
IGF.Dominance.reset(new DominanceInfo(IGF.CurSILFn));
|
|
}
|
|
return IGF.Dominance->dominates(dominatingPoint.as<SILBasicBlock>(),
|
|
activePoint.as<SILBasicBlock>());
|
|
});
|
|
|
|
if (IGM.DebugInfo)
|
|
IGM.DebugInfo->emitFunction(*CurSILFn, CurFn);
|
|
|
|
// Map the entry bb.
|
|
LoweredBBs[&*CurSILFn->begin()] = LoweredBB(&*CurFn->begin(), {});
|
|
// Create LLVM basic blocks for the other bbs.
|
|
for (auto bi = std::next(CurSILFn->begin()), be = CurSILFn->end(); bi != be;
|
|
++bi) {
|
|
// FIXME: Use the SIL basic block's name.
|
|
llvm::BasicBlock *llBB = llvm::BasicBlock::Create(IGM.getLLVMContext());
|
|
auto phis = emitPHINodesForBBArgs(*this, &*bi, llBB);
|
|
CurFn->getBasicBlockList().push_back(llBB);
|
|
LoweredBBs[&*bi] = LoweredBB(llBB, std::move(phis));
|
|
}
|
|
|
|
auto entry = LoweredBBs.begin();
|
|
Builder.SetInsertPoint(entry->second.bb);
|
|
|
|
// Map the LLVM arguments to arguments on the entry point BB.
|
|
Explosion params = collectParameters();
|
|
auto funcTy = CurSILFn->getLoweredFunctionType();
|
|
|
|
switch (funcTy->getLanguage()) {
|
|
case SILFunctionLanguage::Swift:
|
|
emitEntryPointArgumentsNativeCC(*this, entry->first, params);
|
|
break;
|
|
case SILFunctionLanguage::C:
|
|
emitEntryPointArgumentsCOrObjC(*this, entry->first, params, funcTy);
|
|
break;
|
|
}
|
|
emitLocalSelfMetadata(*this);
|
|
|
|
assert(params.empty() && "did not map all llvm params to SIL params?!");
|
|
|
|
// It's really nice to be able to assume that we've already emitted
|
|
// all the values from dominating blocks --- it makes simple
|
|
// peepholing more powerful and allows us to avoid the need for
|
|
// nasty "forward-declared" values. We can do this by emitting
|
|
// blocks using a simple walk through the successor graph.
|
|
//
|
|
// We do want to preserve the original source order, but that's done
|
|
// by having previously added all the primary blocks to the LLVM
|
|
// function in their original order. As long as any secondary
|
|
// blocks are inserted after the current IP instead of at the end
|
|
// of the function, we're fine.
|
|
|
|
// Invariant: for every block in the work queue, we have visited all
|
|
// of its dominators.
|
|
llvm::SmallPtrSet<SILBasicBlock*, 8> visitedBlocks;
|
|
SmallVector<SILBasicBlock*, 8> workQueue; // really a stack
|
|
|
|
// Queue up the entry block, for which the invariant trivially holds.
|
|
visitedBlocks.insert(&*CurSILFn->begin());
|
|
workQueue.push_back(&*CurSILFn->begin());
|
|
|
|
while (!workQueue.empty()) {
|
|
auto bb = workQueue.pop_back_val();
|
|
|
|
// Emit the block.
|
|
visitSILBasicBlock(bb);
|
|
|
|
#ifndef NDEBUG
|
|
// Assert that the current IR IP (if valid) is immediately prior
|
|
// to the initial IR block for the next primary SIL block.
|
|
// It's not semantically necessary to preserve SIL block order,
|
|
// but we really should.
|
|
if (auto curBB = Builder.GetInsertBlock()) {
|
|
auto next = std::next(SILFunction::iterator(bb));
|
|
if (next != CurSILFn->end()) {
|
|
auto nextBB = LoweredBBs[&*next].bb;
|
|
assert(&*std::next(curBB->getIterator()) == nextBB &&
|
|
"lost source SIL order?");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// The immediate dominator of a successor of this block needn't be
|
|
// this block, but it has to be something which dominates this
|
|
// block. In either case, we've visited it.
|
|
//
|
|
// Therefore the invariant holds of all the successors, and we can
|
|
// queue them up if we haven't already visited them.
|
|
for (auto *succBB : bb->getSuccessorBlocks()) {
|
|
if (visitedBlocks.insert(succBB).second)
|
|
workQueue.push_back(succBB);
|
|
}
|
|
}
|
|
|
|
// If there are dead blocks in the SIL function, we might have left
|
|
// invalid blocks in the IR. Do another pass and kill them off.
|
|
for (SILBasicBlock &bb : *CurSILFn)
|
|
if (!visitedBlocks.count(&bb))
|
|
LoweredBBs[&bb].bb->eraseFromParent();
|
|
|
|
}
|
|
|
|
void IRGenSILFunction::estimateStackSize() {
|
|
if (EstimatedStackSize >= 0)
|
|
return;
|
|
|
|
// TODO: as soon as we generate alloca instructions with accurate lifetimes
|
|
// we should also do a better stack size calculation here. Currently we
|
|
// add all stack sizes even if life ranges do not overlap.
|
|
for (SILBasicBlock &BB : *CurSILFn) {
|
|
for (SILInstruction &I : BB) {
|
|
if (auto *ASI = dyn_cast<AllocStackInst>(&I)) {
|
|
const TypeInfo &type = getTypeInfo(ASI->getElementType());
|
|
if (llvm::Constant *SizeConst = type.getStaticSize(IGM)) {
|
|
auto *SizeInt = cast<llvm::ConstantInt>(SizeConst);
|
|
EstimatedStackSize += (int)SizeInt->getSExtValue();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitSILBasicBlock(SILBasicBlock *BB) {
|
|
// Insert into the lowered basic block.
|
|
llvm::BasicBlock *llBB = getLoweredBB(BB).bb;
|
|
Builder.SetInsertPoint(llBB);
|
|
|
|
bool InEntryBlock = BB->pred_empty();
|
|
|
|
// Set this block as the dominance point. This implicitly communicates
|
|
// with the dominance resolver configured in emitSILFunction.
|
|
DominanceScope dominance(*this, InEntryBlock ? DominancePoint::universal()
|
|
: DominancePoint(BB));
|
|
|
|
// Generate the body.
|
|
bool InCleanupBlock = false;
|
|
bool KeepCurrentLocation = false;
|
|
|
|
for (auto &I : *BB) {
|
|
if (IGM.DebugInfo) {
|
|
// Set the debug info location for I, if applicable.
|
|
SILLocation ILoc = I.getLoc();
|
|
auto DS = I.getDebugScope();
|
|
// Handle cleanup locations.
|
|
if (ILoc.is<CleanupLocation>()) {
|
|
// Cleanup locations point to the decl of the value that is
|
|
// being destroyed (for diagnostic generation). As far as
|
|
// the linetable is concerned, cleanups at the end of a
|
|
// lexical scope should point to the cleanup location, which
|
|
// is the location of the last instruction in the basic block.
|
|
if (!InCleanupBlock) {
|
|
InCleanupBlock = true;
|
|
// Scan ahead to see if this is the final cleanup block in
|
|
// this basic block.
|
|
auto It = I.getIterator();
|
|
do ++It; while (It != BB->end() &&
|
|
It->getLoc().is<CleanupLocation>());
|
|
// We are still in the middle of a basic block?
|
|
if (It != BB->end() && !isa<TermInst>(It))
|
|
KeepCurrentLocation = true;
|
|
}
|
|
|
|
// Assign the cleanup location to this instruction.
|
|
if (!KeepCurrentLocation) {
|
|
assert(BB->getTerminator());
|
|
ILoc = BB->getTerminator()->getLoc();
|
|
DS = BB->getTerminator()->getDebugScope();
|
|
}
|
|
} else if (InCleanupBlock) {
|
|
KeepCurrentLocation = false;
|
|
InCleanupBlock = false;
|
|
}
|
|
|
|
// Until SILDebugScopes are properly serialized, bare functions
|
|
// are allowed to not have a scope.
|
|
if (!DS) {
|
|
if (CurSILFn->isBare())
|
|
DS = CurSILFn->getDebugScope();
|
|
assert(maybeScopeless(I) && "instruction has location, but no scope");
|
|
}
|
|
|
|
// Set the builder's debug location.
|
|
if (DS && !KeepCurrentLocation)
|
|
IGM.DebugInfo->setCurrentLoc(Builder, DS, ILoc);
|
|
else {
|
|
// Reuse the last scope for an easier-to-read line table.
|
|
auto Prev = --I.getIterator();
|
|
if (Prev != BB->end())
|
|
DS = Prev->getDebugScope();
|
|
// Use an artificial (line 0) location.
|
|
IGM.DebugInfo->setCurrentLoc(Builder, DS);
|
|
}
|
|
|
|
if (isa<TermInst>(&I))
|
|
emitDebugVariableRangeExtension(BB);
|
|
}
|
|
visit(&I);
|
|
|
|
}
|
|
|
|
assert(Builder.hasPostTerminatorIP() && "SIL bb did not terminate block?!");
|
|
}
|
|
|
|
void IRGenSILFunction::visitFunctionRefInst(FunctionRefInst *i) {
|
|
auto fn = i->getReferencedFunction();
|
|
|
|
llvm::Constant *fnPtr = IGM.getAddrOfSILFunction(fn, NotForDefinition);
|
|
|
|
auto sig = IGM.getSignature(fn->getLoweredFunctionType());
|
|
|
|
// Note that the pointer value returned by getAddrOfSILFunction doesn't
|
|
// necessarily have element type sig.getType(), e.g. if it's imported.
|
|
|
|
FunctionPointer fp = FunctionPointer::forDirect(fnPtr, sig);
|
|
|
|
// Store the function as a FunctionPointer so we can avoid bitcasting
|
|
// or thunking if we don't need to.
|
|
setLoweredFunctionPointer(i, fp);
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocGlobalInst(AllocGlobalInst *i) {
|
|
SILGlobalVariable *var = i->getReferencedGlobal();
|
|
SILType loweredTy = var->getLoweredType();
|
|
auto &ti = getTypeInfo(loweredTy);
|
|
|
|
auto expansion = IGM.getResilienceExpansionForLayout(var);
|
|
|
|
// If the global is fixed-size in all resilience domains that can see it,
|
|
// we allocated storage for it statically, and there's nothing to do.
|
|
if (ti.isFixedSize(expansion))
|
|
return;
|
|
|
|
// Otherwise, the static storage for the global consists of a fixed-size
|
|
// buffer.
|
|
Address addr = IGM.getAddrOfSILGlobalVariable(var, ti,
|
|
NotForDefinition);
|
|
emitAllocateValueInBuffer(*this, loweredTy, addr);
|
|
}
|
|
|
|
void IRGenSILFunction::visitGlobalAddrInst(GlobalAddrInst *i) {
|
|
SILGlobalVariable *var = i->getReferencedGlobal();
|
|
SILType loweredTy = var->getLoweredType();
|
|
assert(loweredTy == i->getType().getObjectType());
|
|
auto &ti = getTypeInfo(loweredTy);
|
|
|
|
auto expansion = IGM.getResilienceExpansionForLayout(var);
|
|
|
|
// If the variable is empty in all resilience domains that can see it,
|
|
// don't actually emit a symbol for the global at all, just return undef.
|
|
if (ti.isKnownEmpty(expansion)) {
|
|
setLoweredAddress(i, ti.getUndefAddress());
|
|
return;
|
|
}
|
|
|
|
Address addr = IGM.getAddrOfSILGlobalVariable(var, ti,
|
|
NotForDefinition);
|
|
|
|
// If the global is fixed-size in all resilience domains that can see it,
|
|
// we allocated storage for it statically, and there's nothing to do.
|
|
if (ti.isFixedSize(expansion)) {
|
|
setLoweredAddress(i, addr);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, the static storage for the global consists of a fixed-size
|
|
// buffer; project it.
|
|
addr = emitProjectValueInBuffer(*this, loweredTy, addr);
|
|
|
|
setLoweredAddress(i, addr);
|
|
}
|
|
|
|
void IRGenSILFunction::visitGlobalValueInst(GlobalValueInst *i) {
|
|
SILGlobalVariable *var = i->getReferencedGlobal();
|
|
assert(var->isInitializedObject() &&
|
|
"global_value only supported for statically initialized objects");
|
|
SILType loweredTy = var->getLoweredType();
|
|
assert(loweredTy == i->getType());
|
|
auto &ti = getTypeInfo(loweredTy);
|
|
assert(ti.isFixedSize(IGM.getResilienceExpansionForLayout(var)));
|
|
|
|
llvm::Value *Ref = IGM.getAddrOfSILGlobalVariable(var, ti,
|
|
NotForDefinition).getAddress();
|
|
|
|
CanType ClassType = loweredTy.getSwiftRValueType();
|
|
llvm::Value *Metadata =
|
|
emitClassHeapMetadataRef(*this, ClassType, MetadataValueType::TypeMetadata);
|
|
llvm::Value *CastAddr = Builder.CreateBitCast(Ref, IGM.RefCountedPtrTy);
|
|
llvm::Value *InitRef = emitInitStaticObjectCall(Metadata, CastAddr, "staticref");
|
|
InitRef = Builder.CreateBitCast(InitRef, Ref->getType());
|
|
|
|
Explosion e;
|
|
e.add(InitRef);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitMetatypeInst(swift::MetatypeInst *i) {
|
|
auto metaTy = i->getType().castTo<MetatypeType>();
|
|
Explosion e;
|
|
emitMetatypeRef(*this, metaTy, e);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
static llvm::Value *getClassBaseValue(IRGenSILFunction &IGF,
|
|
SILValue v) {
|
|
if (v->getType().isAddress()) {
|
|
auto addr = IGF.getLoweredAddress(v);
|
|
return IGF.Builder.CreateLoad(addr);
|
|
}
|
|
|
|
Explosion e = IGF.getLoweredExplosion(v);
|
|
return e.claimNext();
|
|
}
|
|
|
|
static llvm::Value *getClassMetatype(IRGenFunction &IGF,
|
|
llvm::Value *baseValue,
|
|
MetatypeRepresentation repr,
|
|
SILType instanceType) {
|
|
switch (repr) {
|
|
case MetatypeRepresentation::Thin:
|
|
llvm_unreachable("Class metatypes are never thin");
|
|
|
|
case MetatypeRepresentation::Thick:
|
|
return emitDynamicTypeOfHeapObject(IGF, baseValue, instanceType);
|
|
|
|
case MetatypeRepresentation::ObjC:
|
|
return emitHeapMetadataRefForHeapObject(IGF, baseValue, instanceType);
|
|
}
|
|
|
|
llvm_unreachable("Not a valid MetatypeRepresentation.");
|
|
}
|
|
|
|
void IRGenSILFunction::visitValueMetatypeInst(swift::ValueMetatypeInst *i) {
|
|
SILType instanceTy = i->getOperand()->getType();
|
|
auto metaTy = i->getType().castTo<MetatypeType>();
|
|
|
|
if (metaTy->getRepresentation() == MetatypeRepresentation::Thin) {
|
|
Explosion empty;
|
|
setLoweredExplosion(i, empty);
|
|
return;
|
|
}
|
|
|
|
Explosion e;
|
|
|
|
if (instanceTy.getClassOrBoundGenericClass()) {
|
|
e.add(getClassMetatype(*this,
|
|
getClassBaseValue(*this, i->getOperand()),
|
|
metaTy->getRepresentation(), instanceTy));
|
|
} else if (auto arch = instanceTy.getAs<ArchetypeType>()) {
|
|
if (arch->requiresClass()) {
|
|
e.add(getClassMetatype(*this,
|
|
getClassBaseValue(*this, i->getOperand()),
|
|
metaTy->getRepresentation(), instanceTy));
|
|
} else {
|
|
Address base = getLoweredAddress(i->getOperand());
|
|
e.add(emitDynamicTypeOfOpaqueArchetype(*this, base,
|
|
i->getOperand()->getType()));
|
|
// FIXME: We need to convert this back to an ObjC class for an
|
|
// ObjC metatype representation.
|
|
if (metaTy->getRepresentation() == MetatypeRepresentation::ObjC)
|
|
unimplemented(i->getLoc().getSourceLoc(),
|
|
"objc metatype of non-class-bounded archetype");
|
|
}
|
|
} else {
|
|
emitMetatypeRef(*this, metaTy, e);
|
|
}
|
|
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitExistentialMetatypeInst(
|
|
swift::ExistentialMetatypeInst *i) {
|
|
Explosion result;
|
|
SILValue op = i->getOperand();
|
|
SILType opType = op->getType();
|
|
|
|
switch (opType.getPreferredExistentialRepresentation(IGM.getSILModule())) {
|
|
case ExistentialRepresentation::Metatype: {
|
|
Explosion existential = getLoweredExplosion(op);
|
|
emitMetatypeOfMetatype(*this, existential, opType, result);
|
|
break;
|
|
}
|
|
case ExistentialRepresentation::Class: {
|
|
Explosion existential = getLoweredExplosion(op);
|
|
emitMetatypeOfClassExistential(*this, existential, i->getType(),
|
|
opType, result);
|
|
break;
|
|
}
|
|
case ExistentialRepresentation::Boxed: {
|
|
Explosion existential = getLoweredExplosion(op);
|
|
emitMetatypeOfBoxedExistential(*this, existential, opType, result);
|
|
break;
|
|
}
|
|
case ExistentialRepresentation::Opaque: {
|
|
Address existential = getLoweredAddress(op);
|
|
emitMetatypeOfOpaqueExistential(*this, existential, opType, result);
|
|
break;
|
|
}
|
|
case ExistentialRepresentation::None:
|
|
llvm_unreachable("Bad existential representation");
|
|
}
|
|
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
static void emitApplyArgument(IRGenSILFunction &IGF,
|
|
SILValue arg,
|
|
SILType paramType,
|
|
Explosion &out) {
|
|
bool isSubstituted = (arg->getType() != paramType);
|
|
|
|
// For indirect arguments, we just need to pass a pointer.
|
|
if (paramType.isAddress()) {
|
|
// This address is of the substituted type.
|
|
auto addr = IGF.getLoweredAddress(arg);
|
|
|
|
// If a substitution is in play, just bitcast the address.
|
|
if (isSubstituted) {
|
|
auto origType = IGF.IGM.getStoragePointerType(paramType);
|
|
addr = IGF.Builder.CreateBitCast(addr, origType);
|
|
}
|
|
|
|
out.add(addr.getAddress());
|
|
return;
|
|
}
|
|
|
|
// Otherwise, it's an explosion, which we may need to translate,
|
|
// both in terms of explosion level and substitution levels.
|
|
assert(arg->getType().isObject());
|
|
|
|
// Fast path: avoid an unnecessary temporary explosion.
|
|
if (!isSubstituted) {
|
|
IGF.getLoweredExplosion(arg, out);
|
|
return;
|
|
}
|
|
|
|
Explosion temp = IGF.getLoweredExplosion(arg);
|
|
reemitAsUnsubstituted(IGF, paramType, arg->getType(),
|
|
temp, out);
|
|
}
|
|
|
|
static llvm::Value *getObjCClassForValue(IRGenFunction &IGF,
|
|
llvm::Value *selfValue,
|
|
CanAnyMetatypeType selfType) {
|
|
// If we have a Swift metatype, map it to the heap metadata, which
|
|
// will be the Class for an ObjC type.
|
|
switch (selfType->getRepresentation()) {
|
|
case swift::MetatypeRepresentation::ObjC:
|
|
return selfValue;
|
|
|
|
case swift::MetatypeRepresentation::Thick:
|
|
// Convert thick metatype to Objective-C metatype.
|
|
return emitClassHeapMetadataRefForMetatype(IGF, selfValue,
|
|
selfType.getInstanceType());
|
|
|
|
case swift::MetatypeRepresentation::Thin:
|
|
llvm_unreachable("Cannot convert Thin metatype to ObjC metatype");
|
|
}
|
|
llvm_unreachable("bad metatype representation");
|
|
}
|
|
|
|
static llvm::Value *emitWitnessTableForLoweredCallee(IRGenSILFunction &IGF,
|
|
CanSILFunctionType origCalleeType,
|
|
SubstitutionList subs) {
|
|
llvm::Value *wtable;
|
|
|
|
if (auto *proto = origCalleeType->getDefaultWitnessMethodProtocol()) {
|
|
// The generic signature for a witness method with abstract Self must
|
|
// have exactly one protocol requirement.
|
|
//
|
|
// We recover the witness table from the substitution that was used to
|
|
// produce the substituted callee type.
|
|
auto subMap = origCalleeType->getGenericSignature()
|
|
->getSubstitutionMap(subs);
|
|
auto origSelfType = proto->getSelfInterfaceType()->getCanonicalType();
|
|
auto substSelfType = origSelfType.subst(subMap)->getCanonicalType();
|
|
auto conformance = *subMap.lookupConformance(origSelfType, proto);
|
|
|
|
llvm::Value *argMetadata = IGF.emitTypeMetadataRef(substSelfType);
|
|
wtable = emitWitnessTableRef(IGF, substSelfType, &argMetadata,
|
|
conformance);
|
|
} else {
|
|
// Otherwise, we have no way of knowing the original protocol or
|
|
// conformance, since the witness has a concrete self type.
|
|
//
|
|
// Protocol witnesses for concrete types are thus not allowed to touch
|
|
// the witness table; they already know all the witnesses, and we can't
|
|
// say who they are.
|
|
wtable = llvm::ConstantPointerNull::get(IGF.IGM.WitnessTablePtrTy);
|
|
}
|
|
|
|
assert(wtable->getType() == IGF.IGM.WitnessTablePtrTy);
|
|
return wtable;
|
|
|
|
}
|
|
|
|
Callee LoweredValue::getCallee(IRGenFunction &IGF,
|
|
llvm::Value *selfValue,
|
|
CalleeInfo &&calleeInfo) const {
|
|
switch (kind) {
|
|
case Kind::FunctionPointer: {
|
|
auto &fn = getFunctionPointer();
|
|
return Callee(std::move(calleeInfo), fn, selfValue);
|
|
}
|
|
|
|
case Kind::ObjCMethod: {
|
|
const auto &objcMethod = getObjCMethod();
|
|
assert(selfValue);
|
|
|
|
// Convert a metatype 'self' argument to the ObjC class pointer.
|
|
// FIXME: why on earth is this not correctly represented in SIL?
|
|
if (auto metatype = dyn_cast<AnyMetatypeType>(
|
|
calleeInfo.OrigFnType->getSelfParameter().getType())) {
|
|
selfValue = getObjCClassForValue(IGF, selfValue, metatype);
|
|
}
|
|
|
|
return getObjCMethodCallee(IGF, objcMethod, selfValue,
|
|
std::move(calleeInfo));
|
|
}
|
|
|
|
case Kind::SingletonExplosion: {
|
|
auto functionValue = getKnownSingletonExplosion();
|
|
|
|
switch (calleeInfo.OrigFnType->getRepresentation()) {
|
|
case SILFunctionType::Representation::Block:
|
|
assert(!selfValue && "block function with self?");
|
|
return getBlockPointerCallee(IGF, functionValue, std::move(calleeInfo));
|
|
|
|
case SILFunctionType::Representation::ObjCMethod:
|
|
case SILFunctionType::Representation::Thick:
|
|
llvm_unreachable("unexpected function with singleton representation");
|
|
|
|
case SILFunctionType::Representation::WitnessMethod:
|
|
case SILFunctionType::Representation::Thin:
|
|
case SILFunctionType::Representation::Closure:
|
|
case SILFunctionType::Representation::Method:
|
|
return getSwiftFunctionPointerCallee(IGF, functionValue, selfValue,
|
|
std::move(calleeInfo));
|
|
|
|
case SILFunctionType::Representation::CFunctionPointer:
|
|
assert(!selfValue && "C function pointer has self?");
|
|
return getCFunctionPointerCallee(IGF, functionValue,
|
|
std::move(calleeInfo));
|
|
}
|
|
llvm_unreachable("bad kind");
|
|
}
|
|
|
|
case Kind::ExplosionVector: {
|
|
auto vector = getKnownExplosionVector();
|
|
assert(calleeInfo.OrigFnType->getRepresentation()
|
|
== SILFunctionType::Representation::Thick);
|
|
|
|
assert(!selfValue && "thick function pointer with self?");
|
|
assert(vector.size() == 2 && "thick function pointer with size != 2");
|
|
llvm::Value *functionValue = vector[0];
|
|
llvm::Value *contextValue = vector[1];
|
|
return getSwiftFunctionPointerCallee(IGF, functionValue, contextValue,
|
|
std::move(calleeInfo));
|
|
}
|
|
|
|
case LoweredValue::Kind::EmptyExplosion:
|
|
case LoweredValue::Kind::OwnedAddress:
|
|
case LoweredValue::Kind::ContainedAddress:
|
|
case LoweredValue::Kind::StackAddress:
|
|
case LoweredValue::Kind::DynamicallyEnforcedAddress:
|
|
llvm_unreachable("not a valid callee");
|
|
}
|
|
llvm_unreachable("bad kind");
|
|
}
|
|
|
|
static CallEmission getCallEmissionForLoweredValue(IRGenSILFunction &IGF,
|
|
CanSILFunctionType origCalleeType,
|
|
CanSILFunctionType substCalleeType,
|
|
const LoweredValue &lv,
|
|
llvm::Value *selfValue,
|
|
const SubstitutionList &substitutions,
|
|
WitnessMetadata *witnessMetadata,
|
|
Explosion &args) {
|
|
Callee callee = lv.getCallee(IGF, selfValue,
|
|
CalleeInfo(origCalleeType, substCalleeType,
|
|
substitutions));
|
|
|
|
switch (origCalleeType->getRepresentation()) {
|
|
case SILFunctionType::Representation::WitnessMethod: {
|
|
llvm::Value *wtable = emitWitnessTableForLoweredCallee(
|
|
IGF, origCalleeType, substitutions);
|
|
witnessMetadata->SelfWitnessTable = wtable;
|
|
break;
|
|
}
|
|
|
|
case SILFunctionType::Representation::ObjCMethod:
|
|
case SILFunctionType::Representation::Thick:
|
|
case SILFunctionType::Representation::Block:
|
|
case SILFunctionType::Representation::Thin:
|
|
case SILFunctionType::Representation::CFunctionPointer:
|
|
case SILFunctionType::Representation::Method:
|
|
case SILFunctionType::Representation::Closure:
|
|
break;
|
|
}
|
|
|
|
CallEmission callEmission(IGF, std::move(callee));
|
|
if (IGF.CurSILFn->isThunk())
|
|
callEmission.addAttribute(llvm::AttributeList::FunctionIndex,
|
|
llvm::Attribute::NoInline);
|
|
|
|
return callEmission;
|
|
}
|
|
|
|
void IRGenSILFunction::visitBuiltinInst(swift::BuiltinInst *i) {
|
|
const BuiltinInfo &builtin = getSILModule().getBuiltinInfo(i->getName());
|
|
|
|
auto argValues = i->getArguments();
|
|
Explosion args;
|
|
|
|
for (auto idx : indices(argValues)) {
|
|
auto argValue = argValues[idx];
|
|
|
|
// Builtin arguments should never be substituted, so use the value's type
|
|
// as the parameter type.
|
|
emitApplyArgument(*this, argValue, argValue->getType(), args);
|
|
}
|
|
|
|
Explosion result;
|
|
emitBuiltinCall(*this, builtin, i->getName(), i->getType(),
|
|
args, result, i->getSubstitutions());
|
|
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitApplyInst(swift::ApplyInst *i) {
|
|
visitFullApplySite(i);
|
|
}
|
|
|
|
void IRGenSILFunction::visitTryApplyInst(swift::TryApplyInst *i) {
|
|
visitFullApplySite(i);
|
|
}
|
|
|
|
void IRGenSILFunction::visitFullApplySite(FullApplySite site) {
|
|
const LoweredValue &calleeLV = getLoweredValue(site.getCallee());
|
|
|
|
auto origCalleeType = site.getOrigCalleeType();
|
|
auto substCalleeType = site.getSubstCalleeType();
|
|
|
|
auto args = site.getArguments();
|
|
SILFunctionConventions origConv(origCalleeType, getSILModule());
|
|
assert(origConv.getNumSILArguments() == args.size());
|
|
|
|
// Extract 'self' if it needs to be passed as the context parameter.
|
|
llvm::Value *selfValue = nullptr;
|
|
if (hasSelfContextParameter(origCalleeType)) {
|
|
SILValue selfArg = args.back();
|
|
args = args.drop_back();
|
|
|
|
if (selfArg->getType().isObject()) {
|
|
selfValue = getLoweredSingletonExplosion(selfArg);
|
|
} else {
|
|
selfValue = getLoweredAddress(selfArg).getAddress();
|
|
}
|
|
}
|
|
|
|
Explosion llArgs;
|
|
WitnessMetadata witnessMetadata;
|
|
CallEmission emission =
|
|
getCallEmissionForLoweredValue(*this, origCalleeType, substCalleeType,
|
|
calleeLV, selfValue, site.getSubstitutions(),
|
|
&witnessMetadata, llArgs);
|
|
|
|
// Lower the arguments and return value in the callee's generic context.
|
|
GenericContextScope scope(IGM, origCalleeType->getGenericSignature());
|
|
|
|
// Lower the SIL arguments to IR arguments.
|
|
|
|
// Turn the formal SIL parameters into IR-gen things.
|
|
for (auto index : indices(args)) {
|
|
emitApplyArgument(*this, args[index], origConv.getSILArgumentType(index),
|
|
llArgs);
|
|
}
|
|
|
|
// Pass the generic arguments.
|
|
if (hasPolymorphicParameters(origCalleeType)) {
|
|
SubstitutionMap subMap;
|
|
if (auto genericSig = origCalleeType->getGenericSignature())
|
|
subMap = genericSig->getSubstitutionMap(site.getSubstitutions());
|
|
emitPolymorphicArguments(*this, origCalleeType,
|
|
subMap, &witnessMetadata, llArgs);
|
|
}
|
|
|
|
// Add all those arguments.
|
|
emission.setArgs(llArgs, false, &witnessMetadata);
|
|
|
|
SILInstruction *i = site.getInstruction();
|
|
|
|
Explosion result;
|
|
emission.emitToExplosion(result, false);
|
|
|
|
if (auto apply = dyn_cast<ApplyInst>(i)) {
|
|
setLoweredExplosion(apply, result);
|
|
} else {
|
|
auto tryApplyInst = cast<TryApplyInst>(i);
|
|
|
|
// Load the error value.
|
|
SILFunctionConventions substConv(substCalleeType, getSILModule());
|
|
SILType errorType = substConv.getSILErrorType();
|
|
Address errorSlot = getErrorResultSlot(errorType);
|
|
auto errorValue = Builder.CreateLoad(errorSlot);
|
|
|
|
auto &normalDest = getLoweredBB(tryApplyInst->getNormalBB());
|
|
auto &errorDest = getLoweredBB(tryApplyInst->getErrorBB());
|
|
|
|
// Zero the error slot to maintain the invariant that it always
|
|
// contains null. This will frequently become a dead store.
|
|
auto nullError = llvm::Constant::getNullValue(errorValue->getType());
|
|
if (!tryApplyInst->getErrorBB()->getSinglePredecessorBlock()) {
|
|
// Only do that here if we can't move the store to the error block.
|
|
// See below.
|
|
Builder.CreateStore(nullError, errorSlot);
|
|
}
|
|
|
|
// If the error value is non-null, branch to the error destination.
|
|
auto hasError = Builder.CreateICmpNE(errorValue, nullError);
|
|
Builder.CreateCondBr(hasError, errorDest.bb, normalDest.bb);
|
|
|
|
// Set up the PHI nodes on the normal edge.
|
|
unsigned firstIndex = 0;
|
|
addIncomingExplosionToPHINodes(*this, normalDest, firstIndex, result);
|
|
assert(firstIndex == normalDest.phis.size());
|
|
|
|
// Set up the PHI nodes on the error edge.
|
|
assert(errorDest.phis.size() == 1);
|
|
errorDest.phis[0]->addIncoming(errorValue, Builder.GetInsertBlock());
|
|
|
|
if (tryApplyInst->getErrorBB()->getSinglePredecessorBlock()) {
|
|
// Zeroing out the error slot only in the error block increases the chance
|
|
// that it will become a dead store.
|
|
auto origBB = Builder.GetInsertBlock();
|
|
Builder.SetInsertPoint(errorDest.bb);
|
|
Builder.CreateStore(nullError, errorSlot);
|
|
Builder.SetInsertPoint(origBB);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// If the value is a @convention(witness_method) function, the context
|
|
/// is the witness table that must be passed to the call.
|
|
///
|
|
/// \param v A value of possibly-polymorphic SILFunctionType.
|
|
/// \param subs This is the set of substitutions that we are going to be
|
|
/// applying to 'v'.
|
|
static std::tuple<FunctionPointer, llvm::Value*, CanSILFunctionType>
|
|
getPartialApplicationFunction(IRGenSILFunction &IGF, SILValue v,
|
|
SubstitutionList subs) {
|
|
LoweredValue &lv = IGF.getLoweredValue(v);
|
|
auto fnType = v->getType().castTo<SILFunctionType>();
|
|
|
|
switch (lv.kind) {
|
|
case LoweredValue::Kind::ContainedAddress:
|
|
case LoweredValue::Kind::StackAddress:
|
|
case LoweredValue::Kind::DynamicallyEnforcedAddress:
|
|
case LoweredValue::Kind::OwnedAddress:
|
|
case LoweredValue::Kind::EmptyExplosion:
|
|
llvm_unreachable("not a valid function");
|
|
|
|
case LoweredValue::Kind::ObjCMethod:
|
|
llvm_unreachable("objc method partial application shouldn't get here");
|
|
|
|
case LoweredValue::Kind::FunctionPointer: {
|
|
llvm::Value *context = nullptr;
|
|
switch (fnType->getRepresentation()) {
|
|
case SILFunctionTypeRepresentation::CFunctionPointer:
|
|
case SILFunctionTypeRepresentation::Block:
|
|
case SILFunctionTypeRepresentation::ObjCMethod:
|
|
llvm_unreachable("partial_apply of foreign functions not implemented");
|
|
|
|
case SILFunctionTypeRepresentation::WitnessMethod:
|
|
context = emitWitnessTableForLoweredCallee(IGF, fnType, subs);
|
|
break;
|
|
case SILFunctionTypeRepresentation::Thick:
|
|
case SILFunctionTypeRepresentation::Thin:
|
|
case SILFunctionTypeRepresentation::Method:
|
|
case SILFunctionTypeRepresentation::Closure:
|
|
break;
|
|
}
|
|
|
|
auto fn = lv.getFunctionPointer();
|
|
return std::make_tuple(fn, context, fnType);
|
|
}
|
|
case LoweredValue::Kind::SingletonExplosion: {
|
|
llvm::Value *fnPtr = lv.getKnownSingletonExplosion();
|
|
auto fn = FunctionPointer::forExplosionValue(IGF, fnPtr, fnType);
|
|
llvm::Value *context = nullptr;
|
|
auto repr = fnType->getRepresentation();
|
|
assert(repr != SILFunctionType::Representation::Block &&
|
|
"partial apply of block not implemented");
|
|
if (repr == SILFunctionType::Representation::WitnessMethod) {
|
|
context = emitWitnessTableForLoweredCallee(IGF, fnType, subs);
|
|
}
|
|
return std::make_tuple(fn, context, fnType);
|
|
}
|
|
case LoweredValue::Kind::ExplosionVector: {
|
|
assert(fnType->getRepresentation()
|
|
== SILFunctionType::Representation::Thick);
|
|
Explosion ex = lv.getExplosion(IGF, v->getType());
|
|
llvm::Value *fnPtr = ex.claimNext();
|
|
auto fn = FunctionPointer::forExplosionValue(IGF, fnPtr, fnType);
|
|
llvm::Value *context = ex.claimNext();
|
|
return std::make_tuple(fn, context, fnType);
|
|
}
|
|
}
|
|
llvm_unreachable("bad kind");
|
|
}
|
|
|
|
void IRGenSILFunction::visitPartialApplyInst(swift::PartialApplyInst *i) {
|
|
SILValue v(i);
|
|
|
|
// NB: We collect the arguments under the substituted type.
|
|
auto args = i->getArguments();
|
|
auto params = i->getSubstCalleeType()->getParameters();
|
|
params = params.slice(params.size() - args.size(), args.size());
|
|
|
|
Explosion llArgs;
|
|
|
|
// Lower the parameters in the callee's generic context.
|
|
{
|
|
GenericContextScope scope(IGM, i->getOrigCalleeType()->getGenericSignature());
|
|
for (auto index : indices(args)) {
|
|
assert(args[index]->getType() == IGM.silConv.getSILType(params[index]));
|
|
emitApplyArgument(*this, args[index],
|
|
IGM.silConv.getSILType(params[index]), llArgs);
|
|
}
|
|
}
|
|
|
|
auto &lv = getLoweredValue(i->getCallee());
|
|
if (lv.kind == LoweredValue::Kind::ObjCMethod) {
|
|
// Objective-C partial applications require a different path. There's no
|
|
// actual function pointer to capture, and we semantically can't cache
|
|
// dispatch, so we need to perform the message send in the partial
|
|
// application thunk.
|
|
auto &objcMethod = lv.getObjCMethod();
|
|
assert(i->getArguments().size() == 1 &&
|
|
"only partial application of objc method to self implemented");
|
|
assert(llArgs.size() == 1 &&
|
|
"objc partial_apply argument is not a single retainable pointer?!");
|
|
llvm::Value *selfVal = llArgs.claimNext();
|
|
|
|
Explosion function;
|
|
emitObjCPartialApplication(*this,
|
|
objcMethod,
|
|
i->getOrigCalleeType(),
|
|
i->getType().castTo<SILFunctionType>(),
|
|
selfVal,
|
|
i->getArguments()[0]->getType(),
|
|
function);
|
|
setLoweredExplosion(i, function);
|
|
return;
|
|
}
|
|
|
|
// Get the function value.
|
|
auto result = getPartialApplicationFunction(*this, i->getCallee(),
|
|
i->getSubstitutions());
|
|
FunctionPointer calleeFn = std::get<0>(result);
|
|
llvm::Value *innerContext = std::get<1>(result);
|
|
CanSILFunctionType origCalleeTy = std::get<2>(result);
|
|
|
|
// Create the thunk and function value.
|
|
Explosion function;
|
|
emitFunctionPartialApplication(
|
|
*this, *CurSILFn, calleeFn, innerContext, llArgs, params,
|
|
i->getSubstitutions(), origCalleeTy, i->getSubstCalleeType(),
|
|
i->getType().castTo<SILFunctionType>(), function, false);
|
|
setLoweredExplosion(v, function);
|
|
}
|
|
|
|
void IRGenSILFunction::visitIntegerLiteralInst(swift::IntegerLiteralInst *i) {
|
|
llvm::Value *constant = emitConstantInt(IGM, i);
|
|
|
|
Explosion e;
|
|
e.add(constant);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitFloatLiteralInst(swift::FloatLiteralInst *i) {
|
|
llvm::Value *constant = emitConstantFP(IGM, i);
|
|
Explosion e;
|
|
e.add(constant);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStringLiteralInst(swift::StringLiteralInst *i) {
|
|
llvm::Value *addr;
|
|
|
|
// Emit a load of a selector.
|
|
if (i->getEncoding() == swift::StringLiteralInst::Encoding::ObjCSelector)
|
|
addr = emitObjCSelectorRefLoad(i->getValue());
|
|
else
|
|
addr = emitAddrOfConstantString(IGM, i);
|
|
|
|
Explosion e;
|
|
e.add(addr);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitConstStringLiteralInst(
|
|
swift::ConstStringLiteralInst *i) {
|
|
|
|
llvm::Constant *addr;
|
|
if (i->getEncoding() == ConstStringLiteralInst::Encoding::UTF8)
|
|
addr = IGM.getAddrOfGlobalConstantString(i->getValue());
|
|
else
|
|
addr = IGM.getAddrOfGlobalUTF16ConstantString(i->getValue());
|
|
|
|
addr = llvm::ConstantExpr::getBitCast(addr, IGM.Int8PtrTy);
|
|
|
|
Explosion e;
|
|
e.add(addr);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnreachableInst(swift::UnreachableInst *i) {
|
|
Builder.CreateUnreachable();
|
|
}
|
|
|
|
static void emitReturnInst(IRGenSILFunction &IGF,
|
|
SILType resultTy,
|
|
Explosion &result) {
|
|
// The invariant on the out-parameter is that it's always zeroed, so
|
|
// there's nothing to do here.
|
|
|
|
// Even if SIL has a direct return, the IR-level calling convention may
|
|
// require an indirect return.
|
|
if (IGF.IndirectReturn.isValid()) {
|
|
auto &retTI = cast<LoadableTypeInfo>(IGF.getTypeInfo(resultTy));
|
|
retTI.initialize(IGF, result, IGF.IndirectReturn, false);
|
|
IGF.Builder.CreateRetVoid();
|
|
} else {
|
|
auto funcLang = IGF.CurSILFn->getLoweredFunctionType()->getLanguage();
|
|
auto swiftCCReturn = funcLang == SILFunctionLanguage::Swift;
|
|
assert(swiftCCReturn ||
|
|
funcLang == SILFunctionLanguage::C && "Need to handle all cases");
|
|
IGF.emitScalarReturn(resultTy, result, swiftCCReturn, false);
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitReturnInst(swift::ReturnInst *i) {
|
|
Explosion result = getLoweredExplosion(i->getOperand());
|
|
|
|
// Implicitly autorelease the return value if the function's result
|
|
// convention is autoreleased.
|
|
auto fnConv = CurSILFn->getConventions();
|
|
if (fnConv.getNumDirectSILResults() == 1
|
|
&& (fnConv.getDirectSILResults().begin()->getConvention()
|
|
== ResultConvention::Autoreleased)) {
|
|
Explosion temp;
|
|
temp.add(emitObjCAutoreleaseReturnValue(*this, result.claimNext()));
|
|
result = std::move(temp);
|
|
}
|
|
|
|
emitReturnInst(*this, i->getOperand()->getType(), result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitThrowInst(swift::ThrowInst *i) {
|
|
// Store the exception to the error slot.
|
|
llvm::Value *exn = getLoweredSingletonExplosion(i->getOperand());
|
|
|
|
Builder.CreateStore(exn, getCallerErrorResultSlot());
|
|
|
|
// Create a normal return, but leaving the return value undefined.
|
|
auto fnTy = CurFn->getType()->getPointerElementType();
|
|
auto retTy = cast<llvm::FunctionType>(fnTy)->getReturnType();
|
|
if (retTy->isVoidTy()) {
|
|
Builder.CreateRetVoid();
|
|
} else {
|
|
Builder.CreateRet(llvm::UndefValue::get(retTy));
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnwindInst(swift::UnwindInst *i) {
|
|
IGM.unimplemented(i->getLoc().getSourceLoc(),
|
|
"unwind instruction");
|
|
Builder.CreateUnreachable();
|
|
Builder.emitBlock(createBasicBlock("unwind"));
|
|
}
|
|
|
|
void IRGenSILFunction::visitYieldInst(swift::YieldInst *i) {
|
|
IGM.unimplemented(i->getLoc().getSourceLoc(),
|
|
"yield instruction");
|
|
Builder.CreateUnreachable();
|
|
Builder.emitBlock(createBasicBlock("yield"));
|
|
}
|
|
|
|
void IRGenSILFunction::visitBeginApplyInst(BeginApplyInst *i) {
|
|
IGM.unimplemented(i->getLoc().getSourceLoc(),
|
|
"begin_apply instruction");
|
|
|
|
// Set undef lowered values for all the results.
|
|
for (auto result : i->getYieldedValues()) {
|
|
auto &resultTI = getTypeInfo(result->getType());
|
|
if (result->getType().isAddress()) {
|
|
setLoweredAddress(result, resultTI.getUndefAddress());
|
|
} else {
|
|
Explosion undef;
|
|
emitFakeExplosion(resultTI, undef);
|
|
setLoweredExplosion(result, undef);
|
|
}
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitEndApplyInst(EndApplyInst *i) {
|
|
IGM.unimplemented(i->getLoc().getSourceLoc(),
|
|
"end_apply instruction");
|
|
}
|
|
|
|
void IRGenSILFunction::visitAbortApplyInst(AbortApplyInst *i) {
|
|
IGM.unimplemented(i->getLoc().getSourceLoc(),
|
|
"abort_apply instruction");
|
|
}
|
|
|
|
static llvm::BasicBlock *emitBBMapForSwitchValue(
|
|
IRGenSILFunction &IGF,
|
|
SmallVectorImpl<std::pair<SILValue, llvm::BasicBlock*>> &dests,
|
|
SwitchValueInst *inst) {
|
|
for (unsigned i = 0, e = inst->getNumCases(); i < e; ++i) {
|
|
auto casePair = inst->getCase(i);
|
|
dests.push_back({casePair.first, IGF.getLoweredBB(casePair.second).bb});
|
|
}
|
|
|
|
llvm::BasicBlock *defaultDest = nullptr;
|
|
if (inst->hasDefault())
|
|
defaultDest = IGF.getLoweredBB(inst->getDefaultBB()).bb;
|
|
return defaultDest;
|
|
}
|
|
|
|
static llvm::ConstantInt *
|
|
getSwitchCaseValue(IRGenFunction &IGF, SILValue val) {
|
|
if (auto *IL = dyn_cast<IntegerLiteralInst>(val)) {
|
|
return dyn_cast<llvm::ConstantInt>(emitConstantInt(IGF.IGM, IL));
|
|
}
|
|
else {
|
|
llvm_unreachable("Switch value cases should be integers");
|
|
}
|
|
}
|
|
|
|
static void
|
|
emitSwitchValueDispatch(IRGenSILFunction &IGF,
|
|
SILType ty,
|
|
Explosion &value,
|
|
ArrayRef<std::pair<SILValue, llvm::BasicBlock*>> dests,
|
|
llvm::BasicBlock *defaultDest) {
|
|
// Create an unreachable block for the default if the original SIL
|
|
// instruction had none.
|
|
bool unreachableDefault = false;
|
|
if (!defaultDest) {
|
|
unreachableDefault = true;
|
|
defaultDest = llvm::BasicBlock::Create(IGF.IGM.getLLVMContext());
|
|
}
|
|
|
|
if (ty.is<BuiltinIntegerType>()) {
|
|
auto *discriminator = value.claimNext();
|
|
auto *i = IGF.Builder.CreateSwitch(discriminator, defaultDest,
|
|
dests.size());
|
|
for (auto &dest : dests)
|
|
i->addCase(getSwitchCaseValue(IGF, dest.first), dest.second);
|
|
} else {
|
|
// Get the value we're testing, which is a function.
|
|
llvm::Value *val;
|
|
llvm::BasicBlock *nextTest = nullptr;
|
|
if (ty.is<SILFunctionType>()) {
|
|
val = value.claimNext(); // Function pointer.
|
|
//values.claimNext(); // Ignore the data pointer.
|
|
} else {
|
|
llvm_unreachable("switch_value operand has an unknown type");
|
|
}
|
|
|
|
for (int i = 0, e = dests.size(); i < e; ++i) {
|
|
auto casePair = dests[i];
|
|
llvm::Value *caseval;
|
|
auto casevalue = IGF.getLoweredExplosion(casePair.first);
|
|
if (casePair.first->getType().is<SILFunctionType>()) {
|
|
caseval = casevalue.claimNext(); // Function pointer.
|
|
//values.claimNext(); // Ignore the data pointer.
|
|
} else {
|
|
llvm_unreachable("switch_value operand has an unknown type");
|
|
}
|
|
|
|
// Compare operand with a case tag value.
|
|
llvm::Value *cond = IGF.Builder.CreateICmp(llvm::CmpInst::ICMP_EQ,
|
|
val, caseval);
|
|
|
|
if (i == e -1 && !unreachableDefault) {
|
|
nextTest = nullptr;
|
|
IGF.Builder.CreateCondBr(cond, casePair.second, defaultDest);
|
|
} else {
|
|
nextTest = IGF.createBasicBlock("next-test");
|
|
IGF.Builder.CreateCondBr(cond, casePair.second, nextTest);
|
|
IGF.Builder.emitBlock(nextTest);
|
|
IGF.Builder.SetInsertPoint(nextTest);
|
|
}
|
|
}
|
|
|
|
if (nextTest) {
|
|
IGF.Builder.CreateBr(defaultDest);
|
|
}
|
|
}
|
|
|
|
if (unreachableDefault) {
|
|
IGF.Builder.emitBlock(defaultDest);
|
|
IGF.Builder.CreateUnreachable();
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitSwitchValueInst(SwitchValueInst *inst) {
|
|
Explosion value = getLoweredExplosion(inst->getOperand());
|
|
|
|
// Map the SIL dest bbs to their LLVM bbs.
|
|
SmallVector<std::pair<SILValue, llvm::BasicBlock*>, 4> dests;
|
|
auto *defaultDest = emitBBMapForSwitchValue(*this, dests, inst);
|
|
|
|
emitSwitchValueDispatch(*this, inst->getOperand()->getType(),
|
|
value, dests, defaultDest);
|
|
}
|
|
|
|
// Bind an incoming explosion value to an explosion of LLVM phi node(s).
|
|
static void addIncomingExplosionToPHINodes(IRGenSILFunction &IGF,
|
|
ArrayRef<llvm::Value*> phis,
|
|
Explosion &argValue) {
|
|
llvm::BasicBlock *curBB = IGF.Builder.GetInsertBlock();
|
|
unsigned phiIndex = 0;
|
|
while (!argValue.empty())
|
|
cast<llvm::PHINode>(phis[phiIndex++])
|
|
->addIncoming(argValue.claimNext(), curBB);
|
|
assert(phiIndex == phis.size() && "explosion doesn't match number of phis");
|
|
}
|
|
|
|
// Bind an incoming explosion value to a SILArgument's LLVM phi node(s).
|
|
static void addIncomingExplosionToPHINodes(IRGenSILFunction &IGF,
|
|
LoweredBB &lbb,
|
|
unsigned &phiIndex,
|
|
Explosion &argValue) {
|
|
llvm::BasicBlock *curBB = IGF.Builder.GetInsertBlock();
|
|
while (!argValue.empty())
|
|
lbb.phis[phiIndex++]->addIncoming(argValue.claimNext(), curBB);
|
|
}
|
|
|
|
// Bind an incoming address value to a SILArgument's LLVM phi node(s).
|
|
static void addIncomingAddressToPHINodes(IRGenSILFunction &IGF,
|
|
ArrayRef<llvm::Value*> phis,
|
|
Address argValue) {
|
|
llvm::BasicBlock *curBB = IGF.Builder.GetInsertBlock();
|
|
assert(phis.size() == 1 && "more than one phi for address?!");
|
|
cast<llvm::PHINode>(phis[0])->addIncoming(argValue.getAddress(), curBB);
|
|
}
|
|
|
|
// Bind an incoming address value to a SILArgument's LLVM phi node(s).
|
|
static void addIncomingAddressToPHINodes(IRGenSILFunction &IGF,
|
|
LoweredBB &lbb,
|
|
unsigned &phiIndex,
|
|
Address argValue) {
|
|
llvm::BasicBlock *curBB = IGF.Builder.GetInsertBlock();
|
|
lbb.phis[phiIndex++]->addIncoming(argValue.getAddress(), curBB);
|
|
}
|
|
|
|
// Add branch arguments to destination phi nodes.
|
|
static void addIncomingSILArgumentsToPHINodes(IRGenSILFunction &IGF,
|
|
LoweredBB &lbb,
|
|
OperandValueArrayRef args) {
|
|
unsigned phiIndex = 0;
|
|
for (SILValue arg : args) {
|
|
if (arg->getType().isAddress()) {
|
|
addIncomingAddressToPHINodes(IGF, lbb, phiIndex,
|
|
IGF.getLoweredAddress(arg));
|
|
continue;
|
|
}
|
|
|
|
Explosion argValue = IGF.getLoweredExplosion(arg);
|
|
addIncomingExplosionToPHINodes(IGF, lbb, phiIndex, argValue);
|
|
}
|
|
}
|
|
|
|
static llvm::BasicBlock *emitBBMapForSwitchEnum(
|
|
IRGenSILFunction &IGF,
|
|
SmallVectorImpl<std::pair<EnumElementDecl*, llvm::BasicBlock*>> &dests,
|
|
SwitchEnumInstBase *inst) {
|
|
for (unsigned i = 0, e = inst->getNumCases(); i < e; ++i) {
|
|
auto casePair = inst->getCase(i);
|
|
|
|
// If the destination BB accepts the case argument, set up a waypoint BB so
|
|
// we can feed the values into the argument's PHI node(s).
|
|
//
|
|
// FIXME: This is cheesy when the destination BB has only the switch
|
|
// as a predecessor.
|
|
if (!casePair.second->args_empty())
|
|
dests.push_back({casePair.first,
|
|
llvm::BasicBlock::Create(IGF.IGM.getLLVMContext())});
|
|
else
|
|
dests.push_back({casePair.first, IGF.getLoweredBB(casePair.second).bb});
|
|
}
|
|
|
|
llvm::BasicBlock *defaultDest = nullptr;
|
|
if (inst->hasDefault())
|
|
defaultDest = IGF.getLoweredBB(inst->getDefaultBB()).bb;
|
|
return defaultDest;
|
|
}
|
|
|
|
void IRGenSILFunction::visitSwitchEnumInst(SwitchEnumInst *inst) {
|
|
Explosion value = getLoweredExplosion(inst->getOperand());
|
|
|
|
// Map the SIL dest bbs to their LLVM bbs.
|
|
SmallVector<std::pair<EnumElementDecl*, llvm::BasicBlock*>, 4> dests;
|
|
llvm::BasicBlock *defaultDest
|
|
= emitBBMapForSwitchEnum(*this, dests, inst);
|
|
|
|
// Emit the dispatch.
|
|
auto &EIS = getEnumImplStrategy(IGM, inst->getOperand()->getType());
|
|
EIS.emitValueSwitch(*this, value, dests, defaultDest);
|
|
|
|
// Bind arguments for cases that want them.
|
|
for (unsigned i = 0, e = inst->getNumCases(); i < e; ++i) {
|
|
auto casePair = inst->getCase(i);
|
|
|
|
if (!casePair.second->args_empty()) {
|
|
auto waypointBB = dests[i].second;
|
|
auto &destLBB = getLoweredBB(casePair.second);
|
|
|
|
Builder.emitBlock(waypointBB);
|
|
|
|
Explosion inValue = getLoweredExplosion(inst->getOperand());
|
|
Explosion projected;
|
|
emitProjectLoadableEnum(*this, inst->getOperand()->getType(),
|
|
inValue, casePair.first, projected);
|
|
|
|
unsigned phiIndex = 0;
|
|
addIncomingExplosionToPHINodes(*this, destLBB, phiIndex, projected);
|
|
|
|
Builder.CreateBr(destLBB.bb);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
IRGenSILFunction::visitSwitchEnumAddrInst(SwitchEnumAddrInst *inst) {
|
|
Address value = getLoweredAddress(inst->getOperand());
|
|
|
|
// Map the SIL dest bbs to their LLVM bbs.
|
|
SmallVector<std::pair<EnumElementDecl*, llvm::BasicBlock*>, 4> dests;
|
|
llvm::BasicBlock *defaultDest
|
|
= emitBBMapForSwitchEnum(*this, dests, inst);
|
|
|
|
// Emit the dispatch.
|
|
emitSwitchAddressOnlyEnumDispatch(*this, inst->getOperand()->getType(),
|
|
value, dests, defaultDest);
|
|
}
|
|
|
|
// FIXME: We could lower select_enum directly to LLVM select in a lot of cases.
|
|
// For now, just emit a switch and phi nodes, like a chump.
|
|
template<class C, class T>
|
|
static llvm::BasicBlock *
|
|
emitBBMapForSelect(IRGenSILFunction &IGF,
|
|
Explosion &resultPHI,
|
|
SmallVectorImpl<std::pair<T, llvm::BasicBlock*>> &BBs,
|
|
llvm::BasicBlock *&defaultBB,
|
|
SelectInstBase<C, T> *inst) {
|
|
|
|
auto origBB = IGF.Builder.GetInsertBlock();
|
|
|
|
// Set up a continuation BB and phi nodes to receive the result value.
|
|
llvm::BasicBlock *contBB = IGF.createBasicBlock("select_enum");
|
|
IGF.Builder.SetInsertPoint(contBB);
|
|
|
|
// Emit an explosion of phi node(s) to receive the value.
|
|
SmallVector<llvm::Value*, 4> phis;
|
|
auto &ti = IGF.getTypeInfo(inst->getType());
|
|
emitPHINodesForType(IGF, inst->getType(), ti,
|
|
inst->getNumCases() + inst->hasDefault(),
|
|
phis);
|
|
resultPHI.add(phis);
|
|
|
|
IGF.Builder.SetInsertPoint(origBB);
|
|
|
|
auto addIncoming = [&](SILValue value) {
|
|
if (value->getType().isAddress()) {
|
|
addIncomingAddressToPHINodes(IGF, resultPHI.getAll(),
|
|
IGF.getLoweredAddress(value));
|
|
} else {
|
|
Explosion ex = IGF.getLoweredExplosion(value);
|
|
addIncomingExplosionToPHINodes(IGF, resultPHI.getAll(), ex);
|
|
}
|
|
};
|
|
|
|
for (unsigned i = 0, e = inst->getNumCases(); i < e; ++i) {
|
|
auto casePair = inst->getCase(i);
|
|
|
|
// Create a basic block destination for this case.
|
|
llvm::BasicBlock *destBB = IGF.createBasicBlock("");
|
|
IGF.Builder.emitBlock(destBB);
|
|
|
|
// Feed the corresponding result into the phi nodes.
|
|
addIncoming(casePair.second);
|
|
|
|
// Jump immediately to the continuation.
|
|
IGF.Builder.CreateBr(contBB);
|
|
BBs.push_back(std::make_pair(casePair.first, destBB));
|
|
}
|
|
|
|
if (inst->hasDefault()) {
|
|
defaultBB = IGF.createBasicBlock("");
|
|
IGF.Builder.emitBlock(defaultBB);
|
|
|
|
addIncoming(inst->getDefaultResult());
|
|
|
|
IGF.Builder.CreateBr(contBB);
|
|
} else {
|
|
defaultBB = nullptr;
|
|
}
|
|
|
|
IGF.Builder.emitBlock(contBB);
|
|
|
|
IGF.Builder.SetInsertPoint(origBB);
|
|
return contBB;
|
|
}
|
|
|
|
// Try to map the value of a select_enum directly to an int type with a simple
|
|
// cast from the tag value to the result type. Optionally also by adding a
|
|
// constant offset.
|
|
// This is useful, e.g. for rawValue or hashValue of C-like enums.
|
|
static llvm::Value *
|
|
mapTriviallyToInt(IRGenSILFunction &IGF, const EnumImplStrategy &EIS, SelectEnumInst *inst) {
|
|
|
|
// All cases must be covered
|
|
if (inst->hasDefault())
|
|
return nullptr;
|
|
|
|
auto &ti = IGF.getTypeInfo(inst->getType());
|
|
ExplosionSchema schema = ti.getSchema();
|
|
|
|
// Check if the select_enum's result is a single integer scalar.
|
|
if (schema.size() != 1)
|
|
return nullptr;
|
|
|
|
if (!schema[0].isScalar())
|
|
return nullptr;
|
|
|
|
llvm::Type *type = schema[0].getScalarType();
|
|
auto *resultType = dyn_cast<llvm::IntegerType>(type);
|
|
if (!resultType)
|
|
return nullptr;
|
|
|
|
// Check if the case values directly map to the tag values, maybe with a
|
|
// constant offset.
|
|
APInt commonOffset;
|
|
bool offsetValid = false;
|
|
|
|
for (unsigned i = 0, e = inst->getNumCases(); i < e; ++i) {
|
|
auto casePair = inst->getCase(i);
|
|
|
|
int64_t index = EIS.getDiscriminatorIndex(casePair.first);
|
|
if (index < 0)
|
|
return nullptr;
|
|
|
|
auto *intLit = dyn_cast<IntegerLiteralInst>(casePair.second);
|
|
if (!intLit)
|
|
return nullptr;
|
|
|
|
APInt caseValue = intLit->getValue();
|
|
APInt offset = caseValue - index;
|
|
if (offsetValid) {
|
|
if (offset != commonOffset)
|
|
return nullptr;
|
|
} else {
|
|
commonOffset = offset;
|
|
offsetValid = true;
|
|
}
|
|
}
|
|
|
|
// Ask the enum implementation strategy to extract the enum tag as an integer
|
|
// value.
|
|
Explosion enumValue = IGF.getLoweredExplosion(inst->getEnumOperand());
|
|
llvm::Value *result = EIS.emitExtractDiscriminator(IGF, enumValue);
|
|
if (!result) {
|
|
(void)enumValue.claimAll();
|
|
return nullptr;
|
|
}
|
|
|
|
// Cast to the result type.
|
|
result = IGF.Builder.CreateIntCast(result, resultType, false);
|
|
if (commonOffset != 0) {
|
|
// The offset, if any.
|
|
auto *offsetConst = llvm::ConstantInt::get(resultType, commonOffset);
|
|
result = IGF.Builder.CreateAdd(result, offsetConst);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
template <class C, class T>
|
|
static LoweredValue
|
|
getLoweredValueForSelect(IRGenSILFunction &IGF,
|
|
Explosion &result, SelectInstBase<C, T> *inst) {
|
|
if (inst->getType().isAddress())
|
|
// FIXME: Loses potentially better alignment info we might have.
|
|
return LoweredValue(Address(result.claimNext(),
|
|
IGF.getTypeInfo(inst->getType()).getBestKnownAlignment()));
|
|
return LoweredValue(result);
|
|
}
|
|
|
|
static void emitSingleEnumMemberSelectResult(IRGenSILFunction &IGF,
|
|
SelectEnumInstBase *inst,
|
|
llvm::Value *isTrue,
|
|
Explosion &result) {
|
|
assert((inst->getNumCases() == 1 && inst->hasDefault()) ||
|
|
(inst->getNumCases() == 2 && !inst->hasDefault()));
|
|
|
|
// Extract the true values.
|
|
auto trueValue = inst->getCase(0).second;
|
|
SmallVector<llvm::Value*, 4> TrueValues;
|
|
if (trueValue->getType().isAddress()) {
|
|
TrueValues.push_back(IGF.getLoweredAddress(trueValue).getAddress());
|
|
} else {
|
|
Explosion ex = IGF.getLoweredExplosion(trueValue);
|
|
while (!ex.empty())
|
|
TrueValues.push_back(ex.claimNext());
|
|
}
|
|
|
|
// Extract the false values.
|
|
auto falseValue =
|
|
inst->hasDefault() ? inst->getDefaultResult() : inst->getCase(1).second;
|
|
SmallVector<llvm::Value*, 4> FalseValues;
|
|
if (falseValue->getType().isAddress()) {
|
|
FalseValues.push_back(IGF.getLoweredAddress(falseValue).getAddress());
|
|
} else {
|
|
Explosion ex = IGF.getLoweredExplosion(falseValue);
|
|
while (!ex.empty())
|
|
FalseValues.push_back(ex.claimNext());
|
|
}
|
|
|
|
assert(TrueValues.size() == FalseValues.size() &&
|
|
"explosions didn't produce same element count?");
|
|
for (unsigned i = 0, e = FalseValues.size(); i != e; ++i) {
|
|
auto *TV = TrueValues[i], *FV = FalseValues[i];
|
|
// It is pretty common to select between zero and 1 as the result of the
|
|
// select. Instead of emitting an obviously dumb select, emit nothing or
|
|
// a zext.
|
|
if (auto *TC = dyn_cast<llvm::ConstantInt>(TV))
|
|
if (auto *FC = dyn_cast<llvm::ConstantInt>(FV))
|
|
if (TC->isOne() && FC->isZero()) {
|
|
result.add(IGF.Builder.CreateZExtOrBitCast(isTrue, TV->getType()));
|
|
continue;
|
|
}
|
|
|
|
result.add(IGF.Builder.CreateSelect(isTrue, TV, FalseValues[i]));
|
|
}
|
|
}
|
|
|
|
|
|
void IRGenSILFunction::visitSelectEnumInst(SelectEnumInst *inst) {
|
|
auto &EIS = getEnumImplStrategy(IGM, inst->getEnumOperand()->getType());
|
|
Explosion result;
|
|
|
|
if (llvm::Value *R = mapTriviallyToInt(*this, EIS, inst)) {
|
|
result.add(R);
|
|
} else if ((inst->getNumCases() == 1 && inst->hasDefault()) ||
|
|
(inst->getNumCases() == 2 && !inst->hasDefault())) {
|
|
// If this is testing for one case, do simpler codegen. This is
|
|
// particularly common when testing optionals.
|
|
Explosion value = getLoweredExplosion(inst->getEnumOperand());
|
|
auto isTrue = EIS.emitValueCaseTest(*this, value, inst->getCase(0).first);
|
|
emitSingleEnumMemberSelectResult(*this, inst, isTrue, result);
|
|
} else {
|
|
Explosion value = getLoweredExplosion(inst->getEnumOperand());
|
|
|
|
// Map the SIL dest bbs to their LLVM bbs.
|
|
SmallVector<std::pair<EnumElementDecl*, llvm::BasicBlock*>, 4> dests;
|
|
llvm::BasicBlock *defaultDest;
|
|
llvm::BasicBlock *contBB
|
|
= emitBBMapForSelect(*this, result, dests, defaultDest, inst);
|
|
|
|
// Emit the dispatch.
|
|
EIS.emitValueSwitch(*this, value, dests, defaultDest);
|
|
|
|
// emitBBMapForSelectEnum set up a continuation block and phi nodes to
|
|
// receive the result.
|
|
Builder.SetInsertPoint(contBB);
|
|
}
|
|
setLoweredValue(inst,
|
|
getLoweredValueForSelect(*this, result, inst));
|
|
}
|
|
|
|
void IRGenSILFunction::visitSelectEnumAddrInst(SelectEnumAddrInst *inst) {
|
|
Address value = getLoweredAddress(inst->getEnumOperand());
|
|
Explosion result;
|
|
|
|
if ((inst->getNumCases() == 1 && inst->hasDefault()) ||
|
|
(inst->getNumCases() == 2 && !inst->hasDefault())) {
|
|
auto &EIS = getEnumImplStrategy(IGM, inst->getEnumOperand()->getType());
|
|
// If this is testing for one case, do simpler codegen. This is
|
|
// particularly common when testing optionals.
|
|
auto isTrue = EIS.emitIndirectCaseTest(*this,
|
|
inst->getEnumOperand()->getType(),
|
|
value, inst->getCase(0).first);
|
|
emitSingleEnumMemberSelectResult(*this, inst, isTrue, result);
|
|
} else {
|
|
// Map the SIL dest bbs to their LLVM bbs.
|
|
SmallVector<std::pair<EnumElementDecl*, llvm::BasicBlock*>, 4> dests;
|
|
llvm::BasicBlock *defaultDest;
|
|
llvm::BasicBlock *contBB
|
|
= emitBBMapForSelect(*this, result, dests, defaultDest, inst);
|
|
|
|
// Emit the dispatch.
|
|
emitSwitchAddressOnlyEnumDispatch(*this, inst->getEnumOperand()->getType(),
|
|
value, dests, defaultDest);
|
|
|
|
// emitBBMapForSelectEnum set up a phi node to receive the result.
|
|
Builder.SetInsertPoint(contBB);
|
|
}
|
|
|
|
setLoweredValue(inst,
|
|
getLoweredValueForSelect(*this, result, inst));
|
|
}
|
|
|
|
void IRGenSILFunction::visitSelectValueInst(SelectValueInst *inst) {
|
|
Explosion value = getLoweredExplosion(inst->getOperand());
|
|
|
|
// Map the SIL dest bbs to their LLVM bbs.
|
|
SmallVector<std::pair<SILValue, llvm::BasicBlock*>, 4> dests;
|
|
llvm::BasicBlock *defaultDest;
|
|
Explosion result;
|
|
auto *contBB = emitBBMapForSelect(*this, result, dests, defaultDest, inst);
|
|
|
|
// Emit the dispatch.
|
|
emitSwitchValueDispatch(*this, inst->getOperand()->getType(), value, dests,
|
|
defaultDest);
|
|
|
|
// emitBBMapForSelectEnum set up a continuation block and phi nodes to
|
|
// receive the result.
|
|
Builder.SetInsertPoint(contBB);
|
|
|
|
setLoweredValue(inst,
|
|
getLoweredValueForSelect(*this, result, inst));
|
|
}
|
|
|
|
void IRGenSILFunction::visitDynamicMethodBranchInst(DynamicMethodBranchInst *i){
|
|
LoweredBB &hasMethodBB = getLoweredBB(i->getHasMethodBB());
|
|
LoweredBB &noMethodBB = getLoweredBB(i->getNoMethodBB());
|
|
|
|
// Emit the respondsToSelector: call.
|
|
StringRef selector;
|
|
llvm::SmallString<64> selectorBuffer;
|
|
if (auto fnDecl = dyn_cast<FuncDecl>(i->getMember().getDecl()))
|
|
selector = fnDecl->getObjCSelector().getString(selectorBuffer);
|
|
else if (auto var = dyn_cast<AbstractStorageDecl>(i->getMember().getDecl()))
|
|
selector = var->getObjCGetterSelector().getString(selectorBuffer);
|
|
else
|
|
llvm_unreachable("Unhandled dynamic method branch query");
|
|
|
|
llvm::Value *object = getLoweredExplosion(i->getOperand()).claimNext();
|
|
if (object->getType() != IGM.ObjCPtrTy)
|
|
object = Builder.CreateBitCast(object, IGM.ObjCPtrTy);
|
|
llvm::Value *loadSel = emitObjCSelectorRefLoad(selector);
|
|
|
|
llvm::Value *respondsToSelector
|
|
= emitObjCSelectorRefLoad("respondsToSelector:");
|
|
|
|
llvm::Constant *messenger = IGM.getObjCMsgSendFn();
|
|
llvm::Type *argTys[] = {
|
|
IGM.ObjCPtrTy,
|
|
IGM.Int8PtrTy,
|
|
IGM.Int8PtrTy,
|
|
};
|
|
auto respondsToSelectorTy = llvm::FunctionType::get(IGM.Int1Ty,
|
|
argTys,
|
|
/*isVarArg*/ false)
|
|
->getPointerTo();
|
|
messenger = llvm::ConstantExpr::getBitCast(messenger,
|
|
respondsToSelectorTy);
|
|
llvm::CallInst *call = Builder.CreateCall(messenger,
|
|
{object, respondsToSelector, loadSel});
|
|
call->setDoesNotThrow();
|
|
|
|
// FIXME: Assume (probably safely) that the hasMethodBB has only us as a
|
|
// predecessor, and cannibalize its bb argument so we can represent is as an
|
|
// ObjCMethod lowered value. This is hella gross but saves us having to
|
|
// implement ObjCMethod-to-Explosion lowering and creating a thunk we don't
|
|
// want.
|
|
assert(std::next(i->getHasMethodBB()->pred_begin())
|
|
== i->getHasMethodBB()->pred_end()
|
|
&& "lowering dynamic_method_br with multiple preds for destination "
|
|
"not implemented");
|
|
// Kill the existing lowered value for the bb arg and its phi nodes.
|
|
SILValue methodArg = i->getHasMethodBB()->args_begin()[0];
|
|
Explosion formerLLArg = getLoweredExplosion(methodArg);
|
|
for (llvm::Value *val : formerLLArg.claimAll()) {
|
|
auto phi = cast<llvm::PHINode>(val);
|
|
assert(phi->getNumIncomingValues() == 0 && "phi already used");
|
|
phi->removeFromParent();
|
|
delete phi;
|
|
}
|
|
LoweredValues.erase(methodArg);
|
|
|
|
// Replace the lowered value with an ObjCMethod lowering.
|
|
setLoweredObjCMethod(methodArg, i->getMember());
|
|
|
|
// Create the branch.
|
|
Builder.CreateCondBr(call, hasMethodBB.bb, noMethodBB.bb);
|
|
}
|
|
|
|
void IRGenSILFunction::visitBranchInst(swift::BranchInst *i) {
|
|
LoweredBB &lbb = getLoweredBB(i->getDestBB());
|
|
addIncomingSILArgumentsToPHINodes(*this, lbb, i->getArgs());
|
|
Builder.CreateBr(lbb.bb);
|
|
}
|
|
|
|
void IRGenSILFunction::visitCondBranchInst(swift::CondBranchInst *i) {
|
|
LoweredBB &trueBB = getLoweredBB(i->getTrueBB());
|
|
LoweredBB &falseBB = getLoweredBB(i->getFalseBB());
|
|
llvm::Value *condValue =
|
|
getLoweredExplosion(i->getCondition()).claimNext();
|
|
|
|
addIncomingSILArgumentsToPHINodes(*this, trueBB, i->getTrueArgs());
|
|
addIncomingSILArgumentsToPHINodes(*this, falseBB, i->getFalseArgs());
|
|
|
|
llvm::MDNode *Weights = nullptr;
|
|
auto TrueBBCount = i->getTrueBBCount();
|
|
auto FalseBBCount = i->getFalseBBCount();
|
|
if (TrueBBCount || FalseBBCount)
|
|
Weights = IGM.createProfileWeights(TrueBBCount ? TrueBBCount.getValue() : 0,
|
|
FalseBBCount ? FalseBBCount.getValue() : 0);
|
|
|
|
Builder.CreateCondBr(condValue, trueBB.bb, falseBB.bb, Weights);
|
|
}
|
|
|
|
void IRGenSILFunction::visitRetainValueInst(swift::RetainValueInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
Explosion out;
|
|
cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType()))
|
|
.copy(*this, in, out, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
(void)out.claimAll();
|
|
}
|
|
|
|
void IRGenSILFunction::visitRetainValueAddrInst(swift::RetainValueAddrInst *i) {
|
|
assert(i->getAtomicity() == RefCountingInst::Atomicity::Atomic &&
|
|
"Non atomic retains are not supported");
|
|
SILValue operandValue = i->getOperand();
|
|
Address addr = getLoweredAddress(operandValue);
|
|
SILType addrTy = operandValue->getType();
|
|
SILType objectT = addrTy.getObjectType();
|
|
llvm::Type *llvmType = addr.getAddress()->getType();
|
|
const TypeInfo &addrTI = getTypeInfo(addrTy);
|
|
auto *outlinedF = IGM.getOrCreateRetainFunction(
|
|
addrTI, objectT.getSwiftRValueType()->mapTypeOutOfContext()
|
|
->getCanonicalType(),
|
|
llvmType);
|
|
llvm::Value *args[] = {addr.getAddress()};
|
|
llvm::CallInst *call = Builder.CreateCall(outlinedF, args);
|
|
call->setCallingConv(IGM.DefaultCC);
|
|
}
|
|
|
|
void IRGenSILFunction::visitCopyValueInst(swift::CopyValueInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
Explosion out;
|
|
cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType()))
|
|
.copy(*this, in, out, getDefaultAtomicity());
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
// TODO: Implement this more generally for arbitrary values. Currently the
|
|
// SIL verifier restricts it to single-refcounted-pointer types.
|
|
void IRGenSILFunction::visitAutoreleaseValueInst(swift::AutoreleaseValueInst *i)
|
|
{
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
auto val = in.claimNext();
|
|
|
|
emitObjCAutoreleaseCall(val);
|
|
}
|
|
|
|
void IRGenSILFunction::visitSetDeallocatingInst(SetDeallocatingInst *i) {
|
|
auto *ARI = dyn_cast<AllocRefInst>(i->getOperand());
|
|
if (ARI && StackAllocs.count(ARI)) {
|
|
// A small peep-hole optimization: If the operand is allocated on stack and
|
|
// there is no "significant" code between the set_deallocating and the final
|
|
// dealloc_ref, the set_deallocating is not required.
|
|
// %0 = alloc_ref [stack]
|
|
// ...
|
|
// set_deallocating %0 // not needed
|
|
// // code which does not depend on the RC_DEALLOCATING_FLAG flag.
|
|
// dealloc_ref %0 // not needed (stems from the inlined deallocator)
|
|
// ...
|
|
// dealloc_ref [stack] %0
|
|
SILBasicBlock::iterator Iter(i);
|
|
SILBasicBlock::iterator End = i->getParent()->end();
|
|
for (++Iter; Iter != End; ++Iter) {
|
|
SILInstruction *I = &*Iter;
|
|
if (auto *DRI = dyn_cast<DeallocRefInst>(I)) {
|
|
if (DRI->getOperand() == ARI) {
|
|
// The set_deallocating is followed by a dealloc_ref -> we can ignore
|
|
// it.
|
|
return;
|
|
}
|
|
}
|
|
// Assume that any instruction with side-effects may depend on the
|
|
// RC_DEALLOCATING_FLAG flag.
|
|
if (I->mayHaveSideEffects())
|
|
break;
|
|
}
|
|
}
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
emitNativeSetDeallocating(lowered.claimNext());
|
|
}
|
|
|
|
void IRGenSILFunction::visitReleaseValueInst(swift::ReleaseValueInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType()))
|
|
.consume(*this, in, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
void IRGenSILFunction::visitReleaseValueAddrInst(
|
|
swift::ReleaseValueAddrInst *i) {
|
|
assert(i->getAtomicity() == RefCountingInst::Atomicity::Atomic &&
|
|
"Non atomic retains are not supported");
|
|
SILValue operandValue = i->getOperand();
|
|
Address addr = getLoweredAddress(operandValue);
|
|
SILType addrTy = operandValue->getType();
|
|
SILType objectT = addrTy.getObjectType();
|
|
llvm::Type *llvmType = addr.getAddress()->getType();
|
|
const TypeInfo &addrTI = getTypeInfo(addrTy);
|
|
auto *outlinedF = IGM.getOrCreateReleaseFunction(
|
|
addrTI, objectT.getSwiftRValueType()->mapTypeOutOfContext()
|
|
->getCanonicalType(),
|
|
llvmType);
|
|
llvm::Value *args[] = {addr.getAddress()};
|
|
llvm::CallInst *call = Builder.CreateCall(outlinedF, args);
|
|
call->setCallingConv(IGM.DefaultCC);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDestroyValueInst(swift::DestroyValueInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType()))
|
|
.consume(*this, in, getDefaultAtomicity());
|
|
}
|
|
|
|
void IRGenSILFunction::visitStructInst(swift::StructInst *i) {
|
|
Explosion out;
|
|
for (SILValue elt : i->getElements())
|
|
out.add(getLoweredExplosion(elt).claimAll());
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::visitTupleInst(swift::TupleInst *i) {
|
|
Explosion out;
|
|
for (SILValue elt : i->getElements())
|
|
out.add(getLoweredExplosion(elt).claimAll());
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::visitEnumInst(swift::EnumInst *i) {
|
|
Explosion data = (i->hasOperand())
|
|
? getLoweredExplosion(i->getOperand())
|
|
: Explosion();
|
|
Explosion out;
|
|
emitInjectLoadableEnum(*this, i->getType(), i->getElement(), data, out);
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::visitInitEnumDataAddrInst(swift::InitEnumDataAddrInst *i) {
|
|
Address enumAddr = getLoweredAddress(i->getOperand());
|
|
Address dataAddr = emitProjectEnumAddressForStore(*this,
|
|
i->getOperand()->getType(),
|
|
enumAddr,
|
|
i->getElement());
|
|
setLoweredAddress(i, dataAddr);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUncheckedEnumDataInst(swift::UncheckedEnumDataInst *i) {
|
|
Explosion enumVal = getLoweredExplosion(i->getOperand());
|
|
Explosion data;
|
|
emitProjectLoadableEnum(*this, i->getOperand()->getType(),
|
|
enumVal, i->getElement(), data);
|
|
setLoweredExplosion(i, data);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUncheckedTakeEnumDataAddrInst(swift::UncheckedTakeEnumDataAddrInst *i) {
|
|
Address enumAddr = getLoweredAddress(i->getOperand());
|
|
Address dataAddr = emitDestructiveProjectEnumAddressForLoad(*this,
|
|
i->getOperand()->getType(),
|
|
enumAddr,
|
|
i->getElement());
|
|
setLoweredAddress(i, dataAddr);
|
|
}
|
|
|
|
void IRGenSILFunction::visitInjectEnumAddrInst(swift::InjectEnumAddrInst *i) {
|
|
Address enumAddr = getLoweredAddress(i->getOperand());
|
|
emitStoreEnumTagToAddress(*this, i->getOperand()->getType(),
|
|
enumAddr, i->getElement());
|
|
}
|
|
|
|
void IRGenSILFunction::visitTupleExtractInst(swift::TupleExtractInst *i) {
|
|
Explosion fullTuple = getLoweredExplosion(i->getOperand());
|
|
Explosion output;
|
|
SILType baseType = i->getOperand()->getType();
|
|
|
|
projectTupleElementFromExplosion(*this,
|
|
baseType,
|
|
fullTuple,
|
|
i->getFieldNo(),
|
|
output);
|
|
(void)fullTuple.claimAll();
|
|
setLoweredExplosion(i, output);
|
|
}
|
|
|
|
void IRGenSILFunction::visitTupleElementAddrInst(swift::TupleElementAddrInst *i)
|
|
{
|
|
Address base = getLoweredAddress(i->getOperand());
|
|
SILType baseType = i->getOperand()->getType();
|
|
|
|
Address field = projectTupleElementAddress(*this, base, baseType,
|
|
i->getFieldNo());
|
|
setLoweredAddress(i, field);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStructExtractInst(swift::StructExtractInst *i) {
|
|
Explosion operand = getLoweredExplosion(i->getOperand());
|
|
Explosion lowered;
|
|
SILType baseType = i->getOperand()->getType();
|
|
|
|
projectPhysicalStructMemberFromExplosion(*this,
|
|
baseType,
|
|
operand,
|
|
i->getField(),
|
|
lowered);
|
|
|
|
(void)operand.claimAll();
|
|
setLoweredExplosion(i, lowered);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStructElementAddrInst(
|
|
swift::StructElementAddrInst *i) {
|
|
Address base = getLoweredAddress(i->getOperand());
|
|
SILType baseType = i->getOperand()->getType();
|
|
|
|
Address field = projectPhysicalStructMemberAddress(*this, base, baseType,
|
|
i->getField());
|
|
setLoweredAddress(i, field);
|
|
}
|
|
|
|
void IRGenSILFunction::visitRefElementAddrInst(swift::RefElementAddrInst *i) {
|
|
Explosion base = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *value = base.claimNext();
|
|
|
|
SILType baseTy = i->getOperand()->getType();
|
|
Address field = projectPhysicalClassMemberAddress(*this,
|
|
value,
|
|
baseTy,
|
|
i->getType(),
|
|
i->getField())
|
|
.getAddress();
|
|
setLoweredAddress(i, field);
|
|
}
|
|
|
|
void IRGenSILFunction::visitRefTailAddrInst(RefTailAddrInst *i) {
|
|
SILValue Ref = i->getOperand();
|
|
llvm::Value *RefValue = getLoweredExplosion(Ref).claimNext();
|
|
|
|
Address TailAddr = emitTailProjection(*this, RefValue, Ref->getType(),
|
|
i->getTailType());
|
|
setLoweredAddress(i, TailAddr);
|
|
}
|
|
|
|
static bool isInvariantAddress(SILValue v) {
|
|
auto root = getUnderlyingAddressRoot(v);
|
|
if (auto ptrRoot = dyn_cast<PointerToAddressInst>(root)) {
|
|
return ptrRoot->isInvariant();
|
|
}
|
|
// TODO: We could be more aggressive about considering addresses based on
|
|
// `let` variables as invariant when the type of the address is known not to
|
|
// have any sharably-mutable interior storage (in other words, no weak refs,
|
|
// atomics, etc.)
|
|
return false;
|
|
}
|
|
|
|
void IRGenSILFunction::visitLoadInst(swift::LoadInst *i) {
|
|
Explosion lowered;
|
|
Address source = getLoweredAddress(i->getOperand());
|
|
SILType objType = i->getType().getObjectType();
|
|
const auto &typeInfo = cast<LoadableTypeInfo>(getTypeInfo(objType));
|
|
|
|
switch (i->getOwnershipQualifier()) {
|
|
case LoadOwnershipQualifier::Unqualified:
|
|
case LoadOwnershipQualifier::Trivial:
|
|
case LoadOwnershipQualifier::Take:
|
|
typeInfo.loadAsTake(*this, source, lowered);
|
|
break;
|
|
case LoadOwnershipQualifier::Copy:
|
|
typeInfo.loadAsCopy(*this, source, lowered);
|
|
break;
|
|
}
|
|
|
|
if (isInvariantAddress(i->getOperand())) {
|
|
// It'd be better to push this down into `loadAs` methods, perhaps...
|
|
for (auto value : lowered.getAll())
|
|
if (auto load = dyn_cast<llvm::LoadInst>(value))
|
|
setInvariantLoad(load);
|
|
}
|
|
setLoweredExplosion(i, lowered);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStoreInst(swift::StoreInst *i) {
|
|
Explosion source = getLoweredExplosion(i->getSrc());
|
|
Address dest = getLoweredAddress(i->getDest());
|
|
SILType objType = i->getSrc()->getType().getObjectType();
|
|
|
|
const auto &typeInfo = cast<LoadableTypeInfo>(getTypeInfo(objType));
|
|
switch (i->getOwnershipQualifier()) {
|
|
case StoreOwnershipQualifier::Unqualified:
|
|
case StoreOwnershipQualifier::Init:
|
|
case StoreOwnershipQualifier::Trivial:
|
|
typeInfo.initialize(*this, source, dest, false);
|
|
break;
|
|
case StoreOwnershipQualifier::Assign:
|
|
typeInfo.assign(*this, source, dest, false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// Emit the artificial error result argument.
|
|
void IRGenSILFunction::emitErrorResultVar(SILResultInfo ErrorInfo,
|
|
DebugValueInst *DbgValue) {
|
|
// We don't need a shadow error variable for debugging on ABI's that return
|
|
// swifterror in a register.
|
|
if (IGM.IsSwiftErrorInRegister)
|
|
return;
|
|
auto ErrorResultSlot = getErrorResultSlot(IGM.silConv.getSILType(ErrorInfo));
|
|
SILDebugVariable Var = DbgValue->getVarInfo();
|
|
auto Storage = emitShadowCopy(ErrorResultSlot.getAddress(), getDebugScope(),
|
|
Var.Name, Var.ArgNo, false);
|
|
DebugTypeInfo DTI(nullptr, nullptr, ErrorInfo.getType(),
|
|
ErrorResultSlot->getType(), IGM.getPointerSize(),
|
|
IGM.getPointerAlignment(), true);
|
|
IGM.DebugInfo->emitVariableDeclaration(Builder, Storage, DTI, getDebugScope(),
|
|
nullptr, Var.Name, Var.ArgNo,
|
|
IndirectValue, ArtificialValue);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDebugValueInst(DebugValueInst *i) {
|
|
if (!IGM.DebugInfo)
|
|
return;
|
|
|
|
auto SILVal = i->getOperand();
|
|
if (isa<SILUndef>(SILVal)) {
|
|
// We cannot track the location of inlined error arguments because it has no
|
|
// representation in SIL.
|
|
if (!i->getDebugScope()->InlinedCallSite &&
|
|
i->getVarInfo().Name == "$error") {
|
|
auto funcTy = CurSILFn->getLoweredFunctionType();
|
|
emitErrorResultVar(funcTy->getErrorResult(), i);
|
|
}
|
|
return;
|
|
}
|
|
|
|
bool IsAnonymous = false;
|
|
StringRef Name = getVarName(i, IsAnonymous);
|
|
DebugTypeInfo DbgTy;
|
|
SILType SILTy = SILVal->getType();
|
|
auto RealTy = SILVal->getType().getSwiftRValueType();
|
|
if (VarDecl *Decl = i->getDecl()) {
|
|
DbgTy = DebugTypeInfo::getLocalVariable(
|
|
CurSILFn->getDeclContext(), CurSILFn->getGenericEnvironment(), Decl,
|
|
RealTy, getTypeInfo(SILVal->getType()), /*Unwrap=*/false);
|
|
} else if (i->getFunction()->isBare() &&
|
|
!SILTy.hasArchetype() && !Name.empty()) {
|
|
// Preliminary support for .sil debug information.
|
|
DbgTy = DebugTypeInfo::getFromTypeInfo(CurSILFn->getDeclContext(),
|
|
CurSILFn->getGenericEnvironment(),
|
|
RealTy, getTypeInfo(SILTy));
|
|
} else
|
|
return;
|
|
|
|
// Put the value into a stack slot at -Onone.
|
|
llvm::SmallVector<llvm::Value *, 8> Copy;
|
|
Explosion e = getLoweredExplosion(SILVal);
|
|
unsigned ArgNo = i->getVarInfo().ArgNo;
|
|
emitShadowCopy(e.claimAll(), i->getDebugScope(), Name, ArgNo, IsAnonymous,
|
|
Copy);
|
|
emitDebugVariableDeclaration(Copy, DbgTy, SILTy, i->getDebugScope(),
|
|
i->getDecl(), Name, ArgNo);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDebugValueAddrInst(DebugValueAddrInst *i) {
|
|
if (!IGM.DebugInfo)
|
|
return;
|
|
VarDecl *Decl = i->getDecl();
|
|
if (!Decl)
|
|
return;
|
|
|
|
auto SILVal = i->getOperand();
|
|
if (isa<SILUndef>(SILVal))
|
|
return;
|
|
|
|
bool IsAnonymous = false;
|
|
bool IsLoadablyByAddress = isa<AllocStackInst>(SILVal);
|
|
StringRef Name = getVarName(i, IsAnonymous);
|
|
auto Addr = getLoweredAddress(SILVal).getAddress();
|
|
SILType SILTy = SILVal->getType();
|
|
auto RealType = SILTy.getSwiftRValueType();
|
|
if (SILTy.isAddress() && !IsLoadablyByAddress)
|
|
RealType = CanInOutType::get(RealType);
|
|
// Unwrap implicitly indirect types and types that are passed by
|
|
// reference only at the SIL level and below.
|
|
//
|
|
// FIXME: Should this check if the lowered SILType is address only
|
|
// instead? Otherwise optionals of archetypes etc will still have
|
|
// 'Unwrap' set to false.
|
|
bool Unwrap =
|
|
i->getVarInfo().Constant ||
|
|
SILTy.is<ArchetypeType>();
|
|
auto DbgTy = DebugTypeInfo::getLocalVariable(
|
|
CurSILFn->getDeclContext(), CurSILFn->getGenericEnvironment(), Decl,
|
|
RealType, getTypeInfo(SILVal->getType()), Unwrap);
|
|
// Put the value's address into a stack slot at -Onone and emit a debug
|
|
// intrinsic.
|
|
unsigned ArgNo = i->getVarInfo().ArgNo;
|
|
emitDebugVariableDeclaration(
|
|
emitShadowCopy(Addr, i->getDebugScope(), Name, ArgNo, IsAnonymous), DbgTy,
|
|
SILType(), i->getDebugScope(), Decl, Name, ArgNo,
|
|
(IsLoadablyByAddress || DbgTy.isImplicitlyIndirect()) ? DirectValue
|
|
: IndirectValue);
|
|
}
|
|
|
|
void IRGenSILFunction::visitLoadWeakInst(swift::LoadWeakInst *i) {
|
|
Address source = getLoweredAddress(i->getOperand());
|
|
auto &weakTI = cast<WeakTypeInfo>(getTypeInfo(i->getOperand()->getType()));
|
|
|
|
Explosion result;
|
|
if (i->isTake()) {
|
|
weakTI.weakTakeStrong(*this, source, result);
|
|
} else {
|
|
weakTI.weakLoadStrong(*this, source, result);
|
|
}
|
|
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStoreWeakInst(swift::StoreWeakInst *i) {
|
|
Explosion source = getLoweredExplosion(i->getSrc());
|
|
Address dest = getLoweredAddress(i->getDest());
|
|
|
|
auto &weakTI = cast<WeakTypeInfo>(getTypeInfo(i->getDest()->getType()));
|
|
if (i->isInitializationOfDest()) {
|
|
weakTI.weakInit(*this, source, dest);
|
|
} else {
|
|
weakTI.weakAssign(*this, source, dest);
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitFixLifetimeInst(swift::FixLifetimeInst *i) {
|
|
if (i->getOperand()->getType().isAddress()) {
|
|
// Just pass in the address to fix lifetime if we have one. We will not do
|
|
// anything to it so nothing bad should happen.
|
|
emitFixLifetime(getLoweredAddress(i->getOperand()).getAddress());
|
|
return;
|
|
}
|
|
|
|
// Handle objects.
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType()))
|
|
.fixLifetime(*this, in);
|
|
}
|
|
|
|
void IRGenSILFunction::visitMarkDependenceInst(swift::MarkDependenceInst *i) {
|
|
// Dependency-marking is purely for SIL. Just forward the input as
|
|
// the result.
|
|
|
|
SILValue value = i->getValue();
|
|
if (value->getType().isAddress()) {
|
|
setLoweredAddress(i, getLoweredAddress(value));
|
|
} else {
|
|
Explosion temp = getLoweredExplosion(value);
|
|
setLoweredExplosion(i, temp);
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitCopyBlockInst(CopyBlockInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *copied = emitBlockCopyCall(lowered.claimNext());
|
|
Explosion result;
|
|
result.add(copied);
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStrongPinInst(swift::StrongPinInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *object = lowered.claimNext();
|
|
llvm::Value *pinHandle =
|
|
emitNativeTryPin(object, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
|
|
Explosion result;
|
|
result.add(pinHandle);
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStrongUnpinInst(swift::StrongUnpinInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *pinHandle = lowered.claimNext();
|
|
emitNativeUnpin(pinHandle, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStrongRetainInst(swift::StrongRetainInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
auto &ti = cast<ReferenceTypeInfo>(getTypeInfo(i->getOperand()->getType()));
|
|
ti.strongRetain(*this, lowered, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStrongReleaseInst(swift::StrongReleaseInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
auto &ti = cast<ReferenceTypeInfo>(getTypeInfo(i->getOperand()->getType()));
|
|
ti.strongRelease(*this, lowered, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
/// Given a SILType which is a ReferenceStorageType, return the type
|
|
/// info for the underlying reference type.
|
|
static const ReferenceTypeInfo &getReferentTypeInfo(IRGenFunction &IGF,
|
|
SILType silType) {
|
|
auto type = silType.castTo<ReferenceStorageType>().getReferentType();
|
|
return cast<ReferenceTypeInfo>(IGF.getTypeInfoForLowered(type));
|
|
}
|
|
|
|
void IRGenSILFunction::
|
|
visitStrongRetainUnownedInst(swift::StrongRetainUnownedInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
auto &ti = getReferentTypeInfo(*this, i->getOperand()->getType());
|
|
ti.strongRetainUnowned(*this, lowered, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnownedRetainInst(swift::UnownedRetainInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
auto &ti = getReferentTypeInfo(*this, i->getOperand()->getType());
|
|
ti.unownedRetain(*this, lowered, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnownedReleaseInst(swift::UnownedReleaseInst *i) {
|
|
Explosion lowered = getLoweredExplosion(i->getOperand());
|
|
auto &ti = getReferentTypeInfo(*this, i->getOperand()->getType());
|
|
ti.unownedRelease(*this, lowered, i->isAtomic() ? irgen::Atomicity::Atomic
|
|
: irgen::Atomicity::NonAtomic);
|
|
}
|
|
|
|
void IRGenSILFunction::visitLoadUnownedInst(swift::LoadUnownedInst *i) {
|
|
Address source = getLoweredAddress(i->getOperand());
|
|
auto &ti = getReferentTypeInfo(*this, i->getOperand()->getType());
|
|
|
|
Explosion result;
|
|
if (i->isTake()) {
|
|
ti.unownedTakeStrong(*this, source, result);
|
|
} else {
|
|
ti.unownedLoadStrong(*this, source, result);
|
|
}
|
|
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitStoreUnownedInst(swift::StoreUnownedInst *i) {
|
|
Explosion source = getLoweredExplosion(i->getSrc());
|
|
Address dest = getLoweredAddress(i->getDest());
|
|
|
|
auto &ti = getReferentTypeInfo(*this, i->getDest()->getType());
|
|
if (i->isInitializationOfDest()) {
|
|
ti.unownedInit(*this, source, dest);
|
|
} else {
|
|
ti.unownedAssign(*this, source, dest);
|
|
}
|
|
}
|
|
|
|
static bool hasReferenceSemantics(IRGenSILFunction &IGF,
|
|
SILType silType) {
|
|
auto operType = silType.getSwiftRValueType();
|
|
auto valueType = operType->getAnyOptionalObjectType();
|
|
auto objType = valueType ? valueType : operType;
|
|
return (objType->mayHaveSuperclass()
|
|
|| objType->isClassExistentialType()
|
|
|| objType->is<BuiltinNativeObjectType>()
|
|
|| objType->is<BuiltinBridgeObjectType>()
|
|
|| objType->is<BuiltinUnknownObjectType>());
|
|
}
|
|
|
|
static llvm::Value *emitIsUnique(IRGenSILFunction &IGF, SILValue operand,
|
|
SourceLoc loc, bool checkPinned) {
|
|
if (!hasReferenceSemantics(IGF, operand->getType())) {
|
|
llvm::Function *trapIntrinsic = llvm::Intrinsic::getDeclaration(
|
|
&IGF.IGM.Module, llvm::Intrinsic::ID::trap);
|
|
IGF.Builder.CreateCall(trapIntrinsic, {});
|
|
return llvm::UndefValue::get(IGF.IGM.Int1Ty);
|
|
}
|
|
|
|
auto &operTI = cast<LoadableTypeInfo>(IGF.getTypeInfo(operand->getType()));
|
|
LoadedRef ref =
|
|
operTI.loadRefcountedPtr(IGF, loc, IGF.getLoweredAddress(operand));
|
|
|
|
return
|
|
IGF.emitIsUniqueCall(ref.getValue(), loc, ref.isNonNull(), checkPinned);
|
|
}
|
|
|
|
void IRGenSILFunction::visitIsUniqueInst(swift::IsUniqueInst *i) {
|
|
llvm::Value *result = emitIsUnique(*this, i->getOperand(),
|
|
i->getLoc().getSourceLoc(), false);
|
|
Explosion out;
|
|
out.add(result);
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::
|
|
visitIsUniqueOrPinnedInst(swift::IsUniqueOrPinnedInst *i) {
|
|
llvm::Value *result = emitIsUnique(*this, i->getOperand(),
|
|
i->getLoc().getSourceLoc(), true);
|
|
Explosion out;
|
|
out.add(result);
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::emitDebugInfoForAllocStack(AllocStackInst *i,
|
|
const TypeInfo &type,
|
|
llvm::Value *addr) {
|
|
VarDecl *Decl = i->getDecl();
|
|
if (IGM.DebugInfo && Decl) {
|
|
// Ignore compiler-generated patterns but not optional bindings.
|
|
if (auto *Pattern = Decl->getParentPattern())
|
|
if (Pattern->isImplicit() &&
|
|
Pattern->getKind() != PatternKind::OptionalSome)
|
|
return;
|
|
|
|
SILType SILTy = i->getType();
|
|
auto RealType = SILTy.getSwiftRValueType();
|
|
auto DbgTy = DebugTypeInfo::getLocalVariable(
|
|
CurSILFn->getDeclContext(), CurSILFn->getGenericEnvironment(), Decl,
|
|
RealType, type, false);
|
|
bool IsAnonymous = false;
|
|
StringRef Name = getVarName(i, IsAnonymous);
|
|
if (auto DS = i->getDebugScope())
|
|
emitDebugVariableDeclaration(addr, DbgTy, SILTy, DS, Decl, Name,
|
|
i->getVarInfo().ArgNo);
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocStackInst(swift::AllocStackInst *i) {
|
|
const TypeInfo &type = getTypeInfo(i->getElementType());
|
|
|
|
// Derive name from SIL location.
|
|
VarDecl *Decl = i->getDecl();
|
|
StringRef dbgname;
|
|
# ifndef NDEBUG
|
|
// If this is a DEBUG build, use pretty names for the LLVM IR.
|
|
bool IsAnonymous = false;
|
|
dbgname = getVarName(i, IsAnonymous);
|
|
# endif
|
|
|
|
(void) Decl;
|
|
|
|
auto addr = type.allocateStack(*this, i->getElementType(), dbgname);
|
|
|
|
emitDebugInfoForAllocStack(i, type, addr.getAddress().getAddress());
|
|
|
|
setLoweredStackAddress(i, addr);
|
|
}
|
|
|
|
static void
|
|
buildTailArrays(IRGenSILFunction &IGF,
|
|
SmallVectorImpl<std::pair<SILType, llvm::Value *>> &TailArrays,
|
|
AllocRefInstBase *ARI) {
|
|
auto Types = ARI->getTailAllocatedTypes();
|
|
auto Counts = ARI->getTailAllocatedCounts();
|
|
for (unsigned Idx = 0, NumTypes = Types.size(); Idx < NumTypes; ++Idx) {
|
|
Explosion ElemCount = IGF.getLoweredExplosion(Counts[Idx].get());
|
|
TailArrays.push_back({Types[Idx], ElemCount.claimNext()});
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocRefInst(swift::AllocRefInst *i) {
|
|
int StackAllocSize = -1;
|
|
if (i->canAllocOnStack()) {
|
|
estimateStackSize();
|
|
// Is there enough space for stack allocation?
|
|
StackAllocSize = IGM.IRGen.Opts.StackPromotionSizeLimit - EstimatedStackSize;
|
|
}
|
|
SmallVector<std::pair<SILType, llvm::Value *>, 4> TailArrays;
|
|
buildTailArrays(*this, TailArrays, i);
|
|
|
|
llvm::Value *alloced = emitClassAllocation(*this, i->getType(), i->isObjC(),
|
|
StackAllocSize, TailArrays);
|
|
if (StackAllocSize >= 0) {
|
|
// Remember that this alloc_ref allocates the object on the stack.
|
|
|
|
StackAllocs.insert(i);
|
|
EstimatedStackSize += StackAllocSize;
|
|
}
|
|
Explosion e;
|
|
e.add(alloced);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocRefDynamicInst(swift::AllocRefDynamicInst *i) {
|
|
SmallVector<std::pair<SILType, llvm::Value *>, 4> TailArrays;
|
|
buildTailArrays(*this, TailArrays, i);
|
|
|
|
Explosion metadata = getLoweredExplosion(i->getMetatypeOperand());
|
|
auto metadataValue = metadata.claimNext();
|
|
llvm::Value *alloced = emitClassAllocationDynamic(*this, metadataValue,
|
|
i->getType(), i->isObjC(),
|
|
TailArrays);
|
|
Explosion e;
|
|
e.add(alloced);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeallocStackInst(swift::DeallocStackInst *i) {
|
|
auto allocatedType = i->getOperand()->getType();
|
|
const TypeInfo &allocatedTI = getTypeInfo(allocatedType);
|
|
StackAddress stackAddr = getLoweredStackAddress(i->getOperand());
|
|
|
|
allocatedTI.deallocateStack(*this, stackAddr, allocatedType);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeallocRefInst(swift::DeallocRefInst *i) {
|
|
// Lower the operand.
|
|
Explosion self = getLoweredExplosion(i->getOperand());
|
|
auto selfValue = self.claimNext();
|
|
auto *ARI = dyn_cast<AllocRefInst>(i->getOperand());
|
|
if (!i->canAllocOnStack()) {
|
|
if (ARI && StackAllocs.count(ARI)) {
|
|
// We can ignore dealloc_refs (without [stack]) for stack allocated
|
|
// objects.
|
|
//
|
|
// %0 = alloc_ref [stack]
|
|
// ...
|
|
// dealloc_ref %0 // not needed (stems from the inlined deallocator)
|
|
// ...
|
|
// dealloc_ref [stack] %0
|
|
return;
|
|
}
|
|
|
|
auto classType = i->getOperand()->getType();
|
|
emitClassDeallocation(*this, classType, selfValue);
|
|
return;
|
|
}
|
|
// It's a dealloc_ref [stack]. Even if the alloc_ref did not allocate the
|
|
// object on the stack, we don't have to deallocate it, because it is
|
|
// deallocated in the final release.
|
|
assert(ARI->canAllocOnStack());
|
|
if (StackAllocs.count(ARI)) {
|
|
if (IGM.IRGen.Opts.EmitStackPromotionChecks) {
|
|
selfValue = Builder.CreateBitCast(selfValue, IGM.RefCountedPtrTy);
|
|
emitVerifyEndOfLifetimeCall(selfValue);
|
|
} else {
|
|
// This has two purposes:
|
|
// 1. Tell LLVM the lifetime of the allocated stack memory.
|
|
// 2. Avoid tail-call optimization which may convert the call to the final
|
|
// release to a jump, which is done after the stack frame is
|
|
// destructed.
|
|
Builder.CreateLifetimeEnd(selfValue);
|
|
}
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeallocPartialRefInst(swift::DeallocPartialRefInst *i) {
|
|
Explosion self = getLoweredExplosion(i->getInstance());
|
|
auto selfValue = self.claimNext();
|
|
Explosion metadata = getLoweredExplosion(i->getMetatype());
|
|
auto metadataValue = metadata.claimNext();
|
|
auto classType = i->getInstance()->getType();
|
|
|
|
emitPartialClassDeallocation(*this, classType, selfValue, metadataValue);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeallocBoxInst(swift::DeallocBoxInst *i) {
|
|
Explosion owner = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *ownerPtr = owner.claimNext();
|
|
|
|
auto boxTy = i->getOperand()->getType().castTo<SILBoxType>();
|
|
emitDeallocateBox(*this, ownerPtr, boxTy);
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocBoxInst(swift::AllocBoxInst *i) {
|
|
assert(i->getBoxType()->getLayout()->getFields().size() == 1
|
|
&& "multi field boxes not implemented yet");
|
|
const TypeInfo &type = getTypeInfo(i->getBoxType()
|
|
->getFieldType(IGM.getSILModule(), 0));
|
|
|
|
// Derive name from SIL location.
|
|
bool IsAnonymous = false;
|
|
VarDecl *Decl = i->getDecl();
|
|
StringRef Name = getVarName(i, IsAnonymous);
|
|
StringRef DbgName =
|
|
# ifndef NDEBUG
|
|
// If this is a DEBUG build, use pretty names for the LLVM IR.
|
|
Name;
|
|
# else
|
|
"";
|
|
# endif
|
|
|
|
auto boxTy = i->getType().castTo<SILBoxType>();
|
|
OwnedAddress boxWithAddr = emitAllocateBox(*this, boxTy,
|
|
CurSILFn->getGenericEnvironment(),
|
|
DbgName);
|
|
setLoweredBox(i, boxWithAddr);
|
|
|
|
if (IGM.DebugInfo && Decl) {
|
|
// FIXME: This is a workaround to not produce local variables for
|
|
// capture list arguments like "[weak self]". The better solution
|
|
// would be to require all variables to be described with a
|
|
// SILDebugValue(Addr) and then not describe capture list
|
|
// arguments.
|
|
if (Name == IGM.Context.Id_self.str())
|
|
return;
|
|
|
|
assert(i->getBoxType()->getLayout()->getFields().size() == 1
|
|
&& "box for a local variable should only have one field");
|
|
auto SILTy = i->getBoxType()->getFieldType(IGM.getSILModule(), 0);
|
|
auto RealType = SILTy.getSwiftRValueType();
|
|
if (SILTy.isAddress())
|
|
RealType = CanInOutType::get(RealType);
|
|
auto DbgTy = DebugTypeInfo::getLocalVariable(
|
|
CurSILFn->getDeclContext(), CurSILFn->getGenericEnvironment(), Decl,
|
|
RealType, type, /*Unwrap=*/false);
|
|
|
|
if (isInlinedGeneric(Decl, i->getDebugScope()))
|
|
return;
|
|
|
|
IGM.DebugInfo->emitVariableDeclaration(
|
|
Builder,
|
|
emitShadowCopy(boxWithAddr.getAddress(), i->getDebugScope(), Name, 0,
|
|
IsAnonymous),
|
|
DbgTy, i->getDebugScope(), Decl, Name, 0,
|
|
DbgTy.isImplicitlyIndirect() ? DirectValue : IndirectValue);
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitProjectBoxInst(swift::ProjectBoxInst *i) {
|
|
auto boxTy = i->getOperand()->getType().castTo<SILBoxType>();
|
|
|
|
const LoweredValue &val = getLoweredValue(i->getOperand());
|
|
if (val.isBoxWithAddress()) {
|
|
// The operand is an alloc_box. We can directly reuse the address.
|
|
setLoweredAddress(i, val.getAddressOfBox());
|
|
} else {
|
|
// The slow-path: we have to emit code to get from the box to it's
|
|
// value address.
|
|
Explosion box = val.getExplosion(*this, i->getOperand()->getType());
|
|
auto addr = emitProjectBox(*this, box.claimNext(), boxTy);
|
|
setLoweredAddress(i, addr);
|
|
}
|
|
}
|
|
|
|
static ExclusivityFlags getExclusivityAction(SILAccessKind kind) {
|
|
switch (kind) {
|
|
case SILAccessKind::Read:
|
|
return ExclusivityFlags::Read;
|
|
case SILAccessKind::Modify:
|
|
return ExclusivityFlags::Modify;
|
|
case SILAccessKind::Init:
|
|
case SILAccessKind::Deinit:
|
|
llvm_unreachable("init/deinit access should not use dynamic enforcement");
|
|
}
|
|
llvm_unreachable("bad access kind");
|
|
}
|
|
|
|
static ExclusivityFlags getExclusivityFlags(SILModule &M,
|
|
SILAccessKind kind) {
|
|
auto flags = getExclusivityAction(kind);
|
|
|
|
// In old Swift compatibility modes, downgrade this to a warning.
|
|
if (M.getASTContext().LangOpts.isSwiftVersion3())
|
|
flags |= ExclusivityFlags::WarningOnly;
|
|
|
|
return flags;
|
|
}
|
|
|
|
static SILAccessEnforcement getEffectiveEnforcement(IRGenFunction &IGF,
|
|
BeginAccessInst *access) {
|
|
auto enforcement = access->getEnforcement();
|
|
|
|
// Don't use dynamic enforcement for known-empty types; there's no
|
|
// actual memory there, and the address may not be valid and unique.
|
|
// This is really a hack; we don't necessarily know that all clients
|
|
// will agree whether a type is empty. On the other hand, the situations
|
|
// where IRGen generates a meaningless address should always be a subset
|
|
// of cases where this triggers, because of the restrictions on abstracting
|
|
// over addresses and the fact that we use static enforcement on inouts.
|
|
if (enforcement == SILAccessEnforcement::Dynamic &&
|
|
IGF.IGM.isKnownEmpty(access->getSource()->getType(),
|
|
ResilienceExpansion::Maximal)) {
|
|
enforcement = SILAccessEnforcement::Unsafe;
|
|
}
|
|
|
|
return enforcement;
|
|
}
|
|
|
|
template <class Inst>
|
|
static ExclusivityFlags getExclusivityFlags(Inst *i) {
|
|
return getExclusivityFlags(i->getModule(), i->getAccessKind());
|
|
}
|
|
|
|
void IRGenSILFunction::visitBeginAccessInst(BeginAccessInst *access) {
|
|
Address addr = getLoweredAddress(access->getOperand());
|
|
switch (getEffectiveEnforcement(*this, access)) {
|
|
case SILAccessEnforcement::Unknown:
|
|
llvm_unreachable("unknown access enforcement in IRGen!");
|
|
|
|
case SILAccessEnforcement::Static:
|
|
case SILAccessEnforcement::Unsafe:
|
|
// nothing to do
|
|
setLoweredAddress(access, addr);
|
|
return;
|
|
|
|
case SILAccessEnforcement::Dynamic: {
|
|
llvm::Value *scratch = createAlloca(IGM.getFixedBufferTy(),
|
|
IGM.getPointerAlignment(),
|
|
"access-scratch").getAddress();
|
|
Builder.CreateLifetimeStart(scratch);
|
|
|
|
llvm::Value *pointer =
|
|
Builder.CreateBitCast(addr.getAddress(), IGM.Int8PtrTy);
|
|
llvm::Value *flags =
|
|
llvm::ConstantInt::get(IGM.SizeTy, uint64_t(getExclusivityFlags(access)));
|
|
llvm::Value *pc = llvm::ConstantPointerNull::get(IGM.Int8PtrTy);
|
|
auto call = Builder.CreateCall(IGM.getBeginAccessFn(),
|
|
{ pointer, scratch, flags, pc });
|
|
call->setDoesNotThrow();
|
|
|
|
setLoweredDynamicallyEnforcedAddress(access, addr, scratch);
|
|
return;
|
|
}
|
|
}
|
|
llvm_unreachable("bad access enforcement");
|
|
}
|
|
|
|
static bool hasBeenInlined(BeginUnpairedAccessInst *access) {
|
|
// Check to see if the buffer is defined locally.
|
|
return isa<AllocStackInst>(access->getBuffer());
|
|
}
|
|
|
|
void IRGenSILFunction::visitBeginUnpairedAccessInst(
|
|
BeginUnpairedAccessInst *access) {
|
|
Address addr = getLoweredAddress(access->getSource());
|
|
switch (access->getEnforcement()) {
|
|
case SILAccessEnforcement::Unknown:
|
|
llvm_unreachable("unknown access enforcement in IRGen!");
|
|
|
|
case SILAccessEnforcement::Static:
|
|
case SILAccessEnforcement::Unsafe:
|
|
// nothing to do
|
|
return;
|
|
|
|
case SILAccessEnforcement::Dynamic: {
|
|
llvm::Value *scratch = getLoweredAddress(access->getBuffer()).getAddress();
|
|
|
|
llvm::Value *pointer =
|
|
Builder.CreateBitCast(addr.getAddress(), IGM.Int8PtrTy);
|
|
llvm::Value *flags =
|
|
llvm::ConstantInt::get(IGM.SizeTy, uint64_t(getExclusivityFlags(access)));
|
|
|
|
// Compute the effective PC of the access.
|
|
// Since begin_unpaired_access is designed for materializeForSet, our
|
|
// heuristic here is as well: we've either been inlined, in which case
|
|
// we should use the current PC (i.e. pass null), or we haven't,
|
|
// in which case we should use the caller, which is generally ok because
|
|
// materializeForSet can't usually be thunked.
|
|
llvm::Value *pc;
|
|
if (hasBeenInlined(access)) {
|
|
pc = llvm::ConstantPointerNull::get(IGM.Int8PtrTy);
|
|
} else {
|
|
auto retAddrFn =
|
|
llvm::Intrinsic::getDeclaration(IGM.getModule(),
|
|
llvm::Intrinsic::returnaddress);
|
|
pc = Builder.CreateCall(retAddrFn,
|
|
{ llvm::ConstantInt::get(IGM.Int32Ty, 0) });
|
|
}
|
|
|
|
auto call = Builder.CreateCall(IGM.getBeginAccessFn(),
|
|
{ pointer, scratch, flags, pc });
|
|
call->setDoesNotThrow();
|
|
return;
|
|
}
|
|
}
|
|
llvm_unreachable("bad access enforcement");
|
|
}
|
|
|
|
void IRGenSILFunction::visitEndAccessInst(EndAccessInst *i) {
|
|
auto access = i->getBeginAccess();
|
|
switch (getEffectiveEnforcement(*this, access)) {
|
|
case SILAccessEnforcement::Unknown:
|
|
llvm_unreachable("unknown access enforcement in IRGen!");
|
|
|
|
case SILAccessEnforcement::Static:
|
|
case SILAccessEnforcement::Unsafe:
|
|
// nothing to do
|
|
return;
|
|
|
|
case SILAccessEnforcement::Dynamic: {
|
|
auto scratch = getLoweredDynamicEnforcementScratchBuffer(access);
|
|
|
|
auto call = Builder.CreateCall(IGM.getEndAccessFn(), { scratch });
|
|
call->setDoesNotThrow();
|
|
|
|
Builder.CreateLifetimeEnd(scratch);
|
|
return;
|
|
}
|
|
}
|
|
llvm_unreachable("bad access enforcement");
|
|
}
|
|
|
|
void IRGenSILFunction::visitEndUnpairedAccessInst(EndUnpairedAccessInst *i) {
|
|
switch (i->getEnforcement()) {
|
|
case SILAccessEnforcement::Unknown:
|
|
llvm_unreachable("unknown access enforcement in IRGen!");
|
|
|
|
case SILAccessEnforcement::Static:
|
|
case SILAccessEnforcement::Unsafe:
|
|
// nothing to do
|
|
return;
|
|
|
|
case SILAccessEnforcement::Dynamic: {
|
|
auto scratch = getLoweredAddress(i->getBuffer()).getAddress();
|
|
|
|
auto call = Builder.CreateCall(IGM.getEndAccessFn(), { scratch });
|
|
call->setDoesNotThrow();
|
|
return;
|
|
}
|
|
}
|
|
llvm_unreachable("bad access enforcement");
|
|
}
|
|
|
|
void IRGenSILFunction::visitConvertFunctionInst(swift::ConvertFunctionInst *i) {
|
|
// This instruction is specified to be a no-op.
|
|
Explosion temp = getLoweredExplosion(i->getOperand());
|
|
setLoweredExplosion(i, temp);
|
|
}
|
|
|
|
void IRGenSILFunction::visitThinFunctionToPointerInst(
|
|
swift::ThinFunctionToPointerInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *fn = in.claimNext();
|
|
fn = Builder.CreateBitCast(fn, IGM.Int8PtrTy);
|
|
Explosion out;
|
|
out.add(fn);
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::visitPointerToThinFunctionInst(
|
|
swift::PointerToThinFunctionInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *fn = in.claimNext();
|
|
fn = Builder.CreateBitCast(fn, IGM.FunctionPtrTy);
|
|
Explosion out;
|
|
out.add(fn);
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::visitAddressToPointerInst(swift::AddressToPointerInst *i)
|
|
{
|
|
Explosion to;
|
|
llvm::Value *addrValue = getLoweredAddress(i->getOperand()).getAddress();
|
|
if (addrValue->getType() != IGM.Int8PtrTy)
|
|
addrValue = Builder.CreateBitCast(addrValue, IGM.Int8PtrTy);
|
|
to.add(addrValue);
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
|
|
// Ignores the isStrict flag because Swift TBAA is not lowered into LLVM IR.
|
|
void IRGenSILFunction::visitPointerToAddressInst(swift::PointerToAddressInst *i)
|
|
{
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *ptrValue = from.claimNext();
|
|
|
|
auto &ti = getTypeInfo(i->getType());
|
|
|
|
llvm::Type *destType = ti.getStorageType()->getPointerTo();
|
|
ptrValue = Builder.CreateBitCast(ptrValue, destType);
|
|
|
|
setLoweredAddress(i,
|
|
ti.getAddressForPointer(ptrValue));
|
|
}
|
|
|
|
static void emitPointerCastInst(IRGenSILFunction &IGF,
|
|
SILValue src,
|
|
SILValue dest,
|
|
const TypeInfo &ti) {
|
|
Explosion from = IGF.getLoweredExplosion(src);
|
|
llvm::Value *ptrValue = from.claimNext();
|
|
// The input may have witness tables or other additional data, but the class
|
|
// reference is always first.
|
|
(void)from.claimAll();
|
|
|
|
auto schema = ti.getSchema();
|
|
assert(schema.size() == 1
|
|
&& schema[0].isScalar()
|
|
&& "pointer schema is not a single scalar?!");
|
|
auto castToType = schema[0].getScalarType();
|
|
|
|
// A retainable pointer representation may be wrapped in an optional, so we
|
|
// need to provide inttoptr/ptrtoint in addition to bitcast.
|
|
ptrValue = IGF.Builder.CreateBitOrPointerCast(ptrValue, castToType);
|
|
|
|
Explosion to;
|
|
to.add(ptrValue);
|
|
IGF.setLoweredExplosion(dest, to);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUncheckedRefCastInst(
|
|
swift::UncheckedRefCastInst *i) {
|
|
auto &ti = getTypeInfo(i->getType());
|
|
emitPointerCastInst(*this, i->getOperand(), i, ti);
|
|
}
|
|
|
|
// TODO: Although runtime checks are not required, we get them anyway when
|
|
// asking the runtime to perform this cast. If this is a performance impact, we
|
|
// can add a CheckedCastMode::Unchecked.
|
|
void IRGenSILFunction::
|
|
visitUncheckedRefCastAddrInst(swift::UncheckedRefCastAddrInst *i) {
|
|
Address dest = getLoweredAddress(i->getDest());
|
|
Address src = getLoweredAddress(i->getSrc());
|
|
emitCheckedCast(*this, src, i->getSourceType(), dest, i->getTargetType(),
|
|
CastConsumptionKind::TakeAlways,
|
|
CheckedCastMode::Unconditional);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUncheckedAddrCastInst(
|
|
swift::UncheckedAddrCastInst *i) {
|
|
auto addr = getLoweredAddress(i->getOperand());
|
|
auto &ti = getTypeInfo(i->getType());
|
|
auto result = Builder.CreateBitCast(addr,ti.getStorageType()->getPointerTo());
|
|
setLoweredAddress(i, result);
|
|
}
|
|
|
|
static bool isStructurallySame(const llvm::Type *T1, const llvm::Type *T2) {
|
|
if (T1 == T2) return true;
|
|
|
|
if (auto *S1 = dyn_cast<llvm::StructType>(T1))
|
|
if (auto *S2 = dyn_cast<llvm::StructType>(T2))
|
|
return S1->isLayoutIdentical(const_cast<llvm::StructType*>(S2));
|
|
return false;
|
|
}
|
|
|
|
// Emit a trap in the event a type does not match expected layout constraints.
|
|
//
|
|
// We can hit this case in specialized functions even for correct user code.
|
|
// If the user dynamically checks for correct type sizes in the generic
|
|
// function, a specialized function can contain the (not executed) bitcast
|
|
// with mismatching fixed sizes.
|
|
// Usually llvm can eliminate this code again because the user's safety
|
|
// check should be constant foldable on llvm level.
|
|
static void emitTrapAndUndefValue(IRGenSILFunction &IGF,
|
|
Explosion &in,
|
|
Explosion &out,
|
|
const LoadableTypeInfo &outTI) {
|
|
llvm::BasicBlock *failBB =
|
|
llvm::BasicBlock::Create(IGF.IGM.getLLVMContext());
|
|
IGF.Builder.CreateBr(failBB);
|
|
IGF.FailBBs.push_back(failBB);
|
|
|
|
IGF.Builder.emitBlock(failBB);
|
|
llvm::Function *trapIntrinsic = llvm::Intrinsic::getDeclaration(
|
|
&IGF.IGM.Module, llvm::Intrinsic::ID::trap);
|
|
IGF.Builder.CreateCall(trapIntrinsic, {});
|
|
IGF.Builder.CreateUnreachable();
|
|
|
|
llvm::BasicBlock *contBB = llvm::BasicBlock::Create(IGF.IGM.getLLVMContext());
|
|
IGF.Builder.emitBlock(contBB);
|
|
(void)in.claimAll();
|
|
for (auto schema : outTI.getSchema())
|
|
out.add(llvm::UndefValue::get(schema.getScalarType()));
|
|
}
|
|
|
|
static void emitUncheckedValueBitCast(IRGenSILFunction &IGF,
|
|
SourceLoc loc,
|
|
Explosion &in,
|
|
const LoadableTypeInfo &inTI,
|
|
Explosion &out,
|
|
const LoadableTypeInfo &outTI) {
|
|
// If the transfer is doable bitwise, and if the elements of the explosion are
|
|
// the same type, then just transfer the elements.
|
|
if (inTI.isBitwiseTakable(ResilienceExpansion::Maximal) &&
|
|
outTI.isBitwiseTakable(ResilienceExpansion::Maximal) &&
|
|
isStructurallySame(inTI.getStorageType(), outTI.getStorageType())) {
|
|
in.transferInto(out, in.size());
|
|
return;
|
|
}
|
|
|
|
// TODO: We could do bitcasts entirely in the value domain in some cases, but
|
|
// for simplicity, let's just always go through the stack for now.
|
|
|
|
// Create the allocation.
|
|
auto inStorage = IGF.createAlloca(inTI.getStorageType(),
|
|
std::max(inTI.getFixedAlignment(),
|
|
outTI.getFixedAlignment()),
|
|
"bitcast");
|
|
|
|
auto maxSize = std::max(inTI.getFixedSize(), outTI.getFixedSize());
|
|
IGF.Builder.CreateLifetimeStart(inStorage, maxSize);
|
|
|
|
// Store the 'in' value.
|
|
inTI.initialize(IGF, in, inStorage, false);
|
|
// Load the 'out' value as the destination type.
|
|
auto outStorage = IGF.Builder.CreateBitCast(inStorage,
|
|
outTI.getStorageType()->getPointerTo());
|
|
outTI.loadAsTake(IGF, outStorage, out);
|
|
|
|
IGF.Builder.CreateLifetimeEnd(inStorage, maxSize);
|
|
return;
|
|
}
|
|
|
|
static void emitValueBitwiseCast(IRGenSILFunction &IGF,
|
|
SourceLoc loc,
|
|
Explosion &in,
|
|
const LoadableTypeInfo &inTI,
|
|
Explosion &out,
|
|
const LoadableTypeInfo &outTI) {
|
|
// Unfortunately, we can't check this invariant until we get to IRGen, since
|
|
// the AST and SIL don't know anything about type layout.
|
|
if (inTI.getFixedSize() < outTI.getFixedSize()) {
|
|
emitTrapAndUndefValue(IGF, in, out, outTI);
|
|
return;
|
|
}
|
|
emitUncheckedValueBitCast(IGF, loc, in, inTI, out, outTI);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUncheckedTrivialBitCastInst(
|
|
swift::UncheckedTrivialBitCastInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
Explosion out;
|
|
|
|
emitValueBitwiseCast(*this, i->getLoc().getSourceLoc(),
|
|
in, cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType())),
|
|
out, cast<LoadableTypeInfo>(getTypeInfo(i->getType())));
|
|
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::
|
|
visitUncheckedBitwiseCastInst(swift::UncheckedBitwiseCastInst *i) {
|
|
Explosion in = getLoweredExplosion(i->getOperand());
|
|
Explosion out;
|
|
|
|
emitValueBitwiseCast(*this, i->getLoc().getSourceLoc(),
|
|
in, cast<LoadableTypeInfo>(getTypeInfo(i->getOperand()->getType())),
|
|
out, cast<LoadableTypeInfo>(getTypeInfo(i->getType())));
|
|
|
|
setLoweredExplosion(i, out);
|
|
}
|
|
|
|
void IRGenSILFunction::visitRefToRawPointerInst(
|
|
swift::RefToRawPointerInst *i) {
|
|
auto &ti = getTypeInfo(i->getType());
|
|
emitPointerCastInst(*this, i->getOperand(), i, ti);
|
|
}
|
|
|
|
void IRGenSILFunction::visitRawPointerToRefInst(swift::RawPointerToRefInst *i) {
|
|
auto &ti = getTypeInfo(i->getType());
|
|
emitPointerCastInst(*this, i->getOperand(), i, ti);
|
|
}
|
|
|
|
// SIL scalar conversions which never change the IR type.
|
|
// FIXME: Except for optionals, which get bit-packed into an integer.
|
|
static void trivialRefConversion(IRGenSILFunction &IGF,
|
|
SILValue input,
|
|
SILValue result) {
|
|
Explosion temp = IGF.getLoweredExplosion(input);
|
|
auto &inputTI = IGF.getTypeInfo(input->getType());
|
|
auto &resultTI = IGF.getTypeInfo(result->getType());
|
|
|
|
// If the types are the same, forward the existing value.
|
|
if (inputTI.getStorageType() == resultTI.getStorageType()) {
|
|
IGF.setLoweredExplosion(result, temp);
|
|
return;
|
|
}
|
|
|
|
auto schema = resultTI.getSchema();
|
|
Explosion out;
|
|
|
|
for (auto schemaElt : schema) {
|
|
auto resultTy = schemaElt.getScalarType();
|
|
|
|
llvm::Value *value = temp.claimNext();
|
|
if (value->getType() == resultTy) {
|
|
// Nothing to do. This happens with the unowned conversions.
|
|
} else if (resultTy->isPointerTy()) {
|
|
value = IGF.Builder.CreateIntToPtr(value, resultTy);
|
|
} else {
|
|
value = IGF.Builder.CreatePtrToInt(value, resultTy);
|
|
}
|
|
out.add(value);
|
|
}
|
|
|
|
IGF.setLoweredExplosion(result, out);
|
|
}
|
|
|
|
// SIL scalar conversions which never change the IR type.
|
|
// FIXME: Except for optionals, which get bit-packed into an integer.
|
|
#define NOOP_CONVERSION(KIND) \
|
|
void IRGenSILFunction::visit##KIND##Inst(swift::KIND##Inst *i) { \
|
|
::trivialRefConversion(*this, i->getOperand(), i); \
|
|
}
|
|
NOOP_CONVERSION(UnownedToRef)
|
|
NOOP_CONVERSION(RefToUnowned)
|
|
NOOP_CONVERSION(UnmanagedToRef)
|
|
NOOP_CONVERSION(RefToUnmanaged)
|
|
#undef NOOP_CONVERSION
|
|
|
|
void IRGenSILFunction::visitThinToThickFunctionInst(
|
|
swift::ThinToThickFunctionInst *i) {
|
|
// Take the incoming function pointer and add a null context pointer to it.
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
Explosion to;
|
|
to.add(from.claimNext());
|
|
to.add(IGM.RefCountedNull);
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
|
|
void IRGenSILFunction::visitThickToObjCMetatypeInst(ThickToObjCMetatypeInst *i){
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *swiftMeta = from.claimNext();
|
|
CanType instanceType(i->getType().castTo<AnyMetatypeType>().getInstanceType());
|
|
Explosion to;
|
|
llvm::Value *classPtr =
|
|
emitClassHeapMetadataRefForMetatype(*this, swiftMeta, instanceType);
|
|
to.add(Builder.CreateBitCast(classPtr, IGM.ObjCClassPtrTy));
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
|
|
void IRGenSILFunction::visitObjCToThickMetatypeInst(
|
|
ObjCToThickMetatypeInst *i) {
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *classPtr = from.claimNext();
|
|
|
|
// Fetch the metadata for that class.
|
|
Explosion to;
|
|
auto metadata = emitObjCMetadataRefForMetadata(*this, classPtr);
|
|
to.add(metadata);
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnconditionalCheckedCastInst(
|
|
swift::UnconditionalCheckedCastInst *i) {
|
|
Explosion value = getLoweredExplosion(i->getOperand());
|
|
Explosion ex;
|
|
emitScalarCheckedCast(*this, value, i->getOperand()->getType(), i->getType(),
|
|
CheckedCastMode::Unconditional, ex);
|
|
setLoweredExplosion(i, ex);
|
|
}
|
|
|
|
void IRGenSILFunction::visitObjCMetatypeToObjectInst(
|
|
ObjCMetatypeToObjectInst *i){
|
|
// Bitcast the @objc metatype reference, which is already an ObjC object, to
|
|
// the destination type.
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *value = from.claimNext();
|
|
value = Builder.CreateBitCast(value, IGM.UnknownRefCountedPtrTy);
|
|
Explosion to;
|
|
to.add(value);
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
|
|
void IRGenSILFunction::visitObjCExistentialMetatypeToObjectInst(
|
|
ObjCExistentialMetatypeToObjectInst *i){
|
|
// Bitcast the @objc metatype reference, which is already an ObjC object, to
|
|
// the destination type. The metatype may carry additional witness tables we
|
|
// can drop.
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *value = from.claimNext();
|
|
(void)from.claimAll();
|
|
value = Builder.CreateBitCast(value, IGM.UnknownRefCountedPtrTy);
|
|
Explosion to;
|
|
to.add(value);
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
void IRGenSILFunction::visitObjCProtocolInst(ObjCProtocolInst *i) {
|
|
// Get the protocol reference.
|
|
llvm::Value *protoRef = emitReferenceToObjCProtocol(*this, i->getProtocol());
|
|
// Bitcast it to the class reference type.
|
|
protoRef = Builder.CreateBitCast(protoRef,
|
|
getTypeInfo(i->getType()).getStorageType());
|
|
Explosion ex;
|
|
ex.add(protoRef);
|
|
setLoweredExplosion(i, ex);
|
|
}
|
|
|
|
void IRGenSILFunction::visitRefToBridgeObjectInst(
|
|
swift::RefToBridgeObjectInst *i) {
|
|
Explosion refEx = getLoweredExplosion(i->getConverted());
|
|
llvm::Value *ref = refEx.claimNext();
|
|
|
|
Explosion bitsEx = getLoweredExplosion(i->getBitsOperand());
|
|
llvm::Value *bits = bitsEx.claimNext();
|
|
|
|
// Mask the bits into the pointer representation.
|
|
llvm::Value *val = Builder.CreatePtrToInt(ref, IGM.SizeTy);
|
|
val = Builder.CreateOr(val, bits);
|
|
val = Builder.CreateIntToPtr(val, IGM.BridgeObjectPtrTy);
|
|
|
|
Explosion resultEx;
|
|
resultEx.add(val);
|
|
|
|
setLoweredExplosion(i, resultEx);
|
|
}
|
|
|
|
void IRGenSILFunction::visitBridgeObjectToRefInst(
|
|
swift::BridgeObjectToRefInst *i) {
|
|
Explosion boEx = getLoweredExplosion(i->getConverted());
|
|
llvm::Value *bo = boEx.claimNext();
|
|
Explosion resultEx;
|
|
|
|
auto &refTI = getTypeInfo(i->getType());
|
|
llvm::Type *refType = refTI.getSchema()[0].getScalarType();
|
|
|
|
// If the value is an ObjC tagged pointer, pass it through verbatim.
|
|
llvm::BasicBlock *taggedCont = nullptr,
|
|
*tagged = nullptr,
|
|
*notTagged = nullptr;
|
|
llvm::Value *taggedRef = nullptr;
|
|
llvm::Value *boBits = nullptr;
|
|
|
|
ClassDecl *Cl = i->getType().getClassOrBoundGenericClass();
|
|
if (IGM.TargetInfo.hasObjCTaggedPointers() &&
|
|
(!Cl || !isKnownNotTaggedPointer(IGM, Cl))) {
|
|
boBits = Builder.CreatePtrToInt(bo, IGM.SizeTy);
|
|
APInt maskValue = IGM.TargetInfo.ObjCPointerReservedBits.asAPInt();
|
|
llvm::Value *mask = llvm::ConstantInt::get(IGM.getLLVMContext(), maskValue);
|
|
llvm::Value *reserved = Builder.CreateAnd(boBits, mask);
|
|
llvm::Value *cond = Builder.CreateICmpEQ(reserved,
|
|
llvm::ConstantInt::get(IGM.SizeTy, 0));
|
|
tagged = createBasicBlock("tagged-pointer"),
|
|
notTagged = createBasicBlock("not-tagged-pointer");
|
|
taggedCont = createBasicBlock("tagged-cont");
|
|
|
|
Builder.CreateCondBr(cond, notTagged, tagged);
|
|
|
|
Builder.emitBlock(tagged);
|
|
taggedRef = Builder.CreateBitCast(bo, refType);
|
|
Builder.CreateBr(taggedCont);
|
|
|
|
// If it's not a tagged pointer, mask off the spare bits.
|
|
Builder.emitBlock(notTagged);
|
|
}
|
|
|
|
// Mask off the spare bits (if they exist).
|
|
auto &spareBits = IGM.getHeapObjectSpareBits();
|
|
llvm::Value *result;
|
|
if (spareBits.any()) {
|
|
APInt maskValue = ~spareBits.asAPInt();
|
|
|
|
if (!boBits)
|
|
boBits = Builder.CreatePtrToInt(bo, IGM.SizeTy);
|
|
|
|
llvm::Value *mask = llvm::ConstantInt::get(IGM.getLLVMContext(), maskValue);
|
|
llvm::Value *masked = Builder.CreateAnd(boBits, mask);
|
|
result = Builder.CreateIntToPtr(masked, refType);
|
|
} else {
|
|
result = Builder.CreateBitCast(bo, refType);
|
|
}
|
|
|
|
if (taggedCont) {
|
|
Builder.CreateBr(taggedCont);
|
|
|
|
Builder.emitBlock(taggedCont);
|
|
|
|
auto phi = Builder.CreatePHI(refType, 2);
|
|
phi->addIncoming(taggedRef, tagged);
|
|
phi->addIncoming(result, notTagged);
|
|
|
|
result = phi;
|
|
}
|
|
|
|
resultEx.add(result);
|
|
setLoweredExplosion(i, resultEx);
|
|
}
|
|
|
|
void IRGenSILFunction::visitBridgeObjectToWordInst(
|
|
swift::BridgeObjectToWordInst *i) {
|
|
Explosion boEx = getLoweredExplosion(i->getConverted());
|
|
llvm::Value *val = boEx.claimNext();
|
|
val = Builder.CreatePtrToInt(val, IGM.SizeTy);
|
|
Explosion wordEx;
|
|
wordEx.add(val);
|
|
setLoweredExplosion(i, wordEx);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnconditionalCheckedCastAddrInst(
|
|
swift::UnconditionalCheckedCastAddrInst *i) {
|
|
Address dest = getLoweredAddress(i->getDest());
|
|
Address src = getLoweredAddress(i->getSrc());
|
|
emitCheckedCast(*this, src, i->getSourceType(), dest, i->getTargetType(),
|
|
CastConsumptionKind::TakeAlways,
|
|
CheckedCastMode::Unconditional);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUnconditionalCheckedCastValueInst(
|
|
swift::UnconditionalCheckedCastValueInst *i) {
|
|
llvm_unreachable("unsupported instruction during IRGen");
|
|
}
|
|
|
|
void IRGenSILFunction::visitCheckedCastValueBranchInst(
|
|
swift::CheckedCastValueBranchInst *i) {
|
|
llvm_unreachable("unsupported instruction during IRGen");
|
|
}
|
|
|
|
void IRGenSILFunction::visitCheckedCastBranchInst(
|
|
swift::CheckedCastBranchInst *i) {
|
|
SILType destTy = i->getCastType();
|
|
FailableCastResult castResult;
|
|
Explosion ex;
|
|
if (i->isExact()) {
|
|
auto operand = i->getOperand();
|
|
Explosion source = getLoweredExplosion(operand);
|
|
castResult = emitClassIdenticalCast(*this, source.claimNext(),
|
|
operand->getType(), destTy);
|
|
} else {
|
|
Explosion value = getLoweredExplosion(i->getOperand());
|
|
emitScalarCheckedCast(*this, value, i->getOperand()->getType(),
|
|
i->getCastType(), CheckedCastMode::Conditional, ex);
|
|
auto val = ex.claimNext();
|
|
castResult.casted = val;
|
|
llvm::Value *nil =
|
|
llvm::ConstantPointerNull::get(cast<llvm::PointerType>(val->getType()));
|
|
castResult.succeeded = Builder.CreateICmpNE(val, nil);
|
|
}
|
|
|
|
// Branch on the success of the cast.
|
|
// All cast operations currently return null on failure.
|
|
|
|
|
|
auto &successBB = getLoweredBB(i->getSuccessBB());
|
|
llvm::Type *toTy = IGM.getTypeInfo(destTy).getStorageType();
|
|
if (toTy->isPointerTy())
|
|
castResult.casted = Builder.CreateBitCast(castResult.casted, toTy);
|
|
|
|
Builder.CreateCondBr(castResult.succeeded,
|
|
successBB.bb,
|
|
getLoweredBB(i->getFailureBB()).bb);
|
|
|
|
// Feed the cast result into the nonnull branch.
|
|
unsigned phiIndex = 0;
|
|
Explosion ex2;
|
|
ex2.add(castResult.casted);
|
|
ex2.add(ex.claimAll());
|
|
addIncomingExplosionToPHINodes(*this, successBB, phiIndex, ex2);
|
|
}
|
|
|
|
void IRGenSILFunction::visitCheckedCastAddrBranchInst(
|
|
swift::CheckedCastAddrBranchInst *i) {
|
|
Address dest = getLoweredAddress(i->getDest());
|
|
Address src = getLoweredAddress(i->getSrc());
|
|
llvm::Value *castSucceeded =
|
|
emitCheckedCast(*this, src, i->getSourceType(), dest, i->getTargetType(),
|
|
i->getConsumptionKind(), CheckedCastMode::Conditional);
|
|
Builder.CreateCondBr(castSucceeded,
|
|
getLoweredBB(i->getSuccessBB()).bb,
|
|
getLoweredBB(i->getFailureBB()).bb);
|
|
}
|
|
|
|
void IRGenSILFunction::visitKeyPathInst(swift::KeyPathInst *I) {
|
|
auto pattern = IGM.getAddrOfKeyPathPattern(I->getPattern(), I->getLoc());
|
|
// Build up the argument vector to instantiate the pattern here.
|
|
Optional<StackAddress> dynamicArgsBuf;
|
|
llvm::Value *args;
|
|
if (!I->getSubstitutions().empty() || !I->getAllOperands().empty()) {
|
|
auto sig = I->getPattern()->getGenericSignature();
|
|
SubstitutionMap subs;
|
|
if (sig)
|
|
subs = sig->getSubstitutionMap(I->getSubstitutions());
|
|
|
|
SmallVector<GenericRequirement, 4> requirements;
|
|
enumerateGenericSignatureRequirements(sig,
|
|
[&](GenericRequirement reqt) { requirements.push_back(reqt); });
|
|
|
|
llvm::Value *argsBufSize;
|
|
llvm::Value *argsBufAlign;
|
|
|
|
if (!I->getSubstitutions().empty()) {
|
|
argsBufSize = llvm::ConstantInt::get(IGM.SizeTy,
|
|
IGM.getPointerSize().getValue() * requirements.size());
|
|
argsBufAlign = llvm::ConstantInt::get(IGM.SizeTy,
|
|
IGM.getPointerAlignment().getMaskValue());
|
|
} else {
|
|
argsBufSize = llvm::ConstantInt::get(IGM.SizeTy, 0);
|
|
argsBufAlign = llvm::ConstantInt::get(IGM.SizeTy, 0);
|
|
}
|
|
|
|
SmallVector<llvm::Value *, 4> operandOffsets;
|
|
for (unsigned i : indices(I->getAllOperands())) {
|
|
auto operand = I->getAllOperands()[i].get();
|
|
auto &ti = getTypeInfo(operand->getType());
|
|
auto ty = operand->getType();
|
|
auto alignMask = ti.getAlignmentMask(*this, ty);
|
|
if (i != 0) {
|
|
auto notAlignMask = Builder.CreateNot(alignMask);
|
|
argsBufSize = Builder.CreateAdd(argsBufSize, alignMask);
|
|
argsBufSize = Builder.CreateAnd(argsBufSize, notAlignMask);
|
|
}
|
|
operandOffsets.push_back(argsBufSize);
|
|
auto size = ti.getSize(*this, ty);
|
|
argsBufSize = Builder.CreateAdd(argsBufSize, size);
|
|
argsBufAlign = Builder.CreateOr(argsBufAlign, alignMask);
|
|
}
|
|
|
|
dynamicArgsBuf = emitDynamicAlloca(IGM.Int8Ty, argsBufSize, Alignment(16));
|
|
|
|
Address argsBuf = dynamicArgsBuf->getAddress();
|
|
|
|
if (!I->getSubstitutions().empty()) {
|
|
emitInitOfGenericRequirementsBuffer(*this, requirements, argsBuf,
|
|
[&](GenericRequirement reqt) -> llvm::Value * {
|
|
return emitGenericRequirementFromSubstitutions(*this, sig,
|
|
*IGM.getSwiftModule(),
|
|
reqt, subs);
|
|
});
|
|
}
|
|
|
|
for (unsigned i : indices(I->getAllOperands())) {
|
|
auto operand = I->getAllOperands()[i].get();
|
|
auto &ti = getTypeInfo(operand->getType());
|
|
auto ptr = Builder.CreateInBoundsGEP(argsBuf.getAddress(),
|
|
operandOffsets[i]);
|
|
auto addr = ti.getAddressForPointer(
|
|
Builder.CreateBitCast(ptr, ti.getStorageType()->getPointerTo()));
|
|
if (operand->getType().isAddress()) {
|
|
ti.initializeWithTake(*this, addr, getLoweredAddress(operand),
|
|
operand->getType(), false);
|
|
} else {
|
|
Explosion operandValue = getLoweredExplosion(operand);
|
|
cast<LoadableTypeInfo>(ti).initialize(*this, operandValue, addr, false);
|
|
}
|
|
}
|
|
args = argsBuf.getAddress();
|
|
} else {
|
|
// No arguments necessary, so the argument ought to be ignored by any
|
|
// callbacks in the pattern.
|
|
assert(I->getAllOperands().empty() && "indices not implemented");
|
|
args = llvm::UndefValue::get(IGM.Int8PtrTy);
|
|
}
|
|
auto patternPtr = llvm::ConstantExpr::getBitCast(pattern, IGM.Int8PtrTy);
|
|
auto call = Builder.CreateCall(IGM.getGetKeyPathFn(), {patternPtr, args});
|
|
call->setDoesNotThrow();
|
|
|
|
if (dynamicArgsBuf) {
|
|
emitDeallocateDynamicAlloca(*dynamicArgsBuf);
|
|
}
|
|
|
|
auto resultStorageTy = IGM.getTypeInfo(I->getType()).getStorageType();
|
|
|
|
Explosion e;
|
|
e.add(Builder.CreateBitCast(call, resultStorageTy));
|
|
setLoweredExplosion(I, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitUpcastInst(swift::UpcastInst *i) {
|
|
auto toTy = getTypeInfo(i->getType()).getSchema()[0].getScalarType();
|
|
|
|
// If we have an address, just bitcast, don't explode.
|
|
if (i->getOperand()->getType().isAddress()) {
|
|
Address fromAddr = getLoweredAddress(i->getOperand());
|
|
llvm::Value *toValue = Builder.CreateBitCast(
|
|
fromAddr.getAddress(), toTy->getPointerTo());
|
|
Address Addr(toValue, fromAddr.getAlignment());
|
|
setLoweredAddress(i, Addr);
|
|
return;
|
|
}
|
|
|
|
Explosion from = getLoweredExplosion(i->getOperand());
|
|
Explosion to;
|
|
assert(from.size() == 1 && "class should explode to single value");
|
|
llvm::Value *fromValue = from.claimNext();
|
|
to.add(Builder.CreateBitCast(fromValue, toTy));
|
|
setLoweredExplosion(i, to);
|
|
}
|
|
|
|
void IRGenSILFunction::visitIndexAddrInst(swift::IndexAddrInst *i) {
|
|
Address base = getLoweredAddress(i->getBase());
|
|
Explosion indexValues = getLoweredExplosion(i->getIndex());
|
|
llvm::Value *index = indexValues.claimNext();
|
|
|
|
auto baseTy = i->getBase()->getType();
|
|
auto &ti = getTypeInfo(baseTy);
|
|
|
|
Address dest = ti.indexArray(*this, base, index, baseTy);
|
|
setLoweredAddress(i, dest);
|
|
}
|
|
|
|
void IRGenSILFunction::visitTailAddrInst(swift::TailAddrInst *i) {
|
|
Address base = getLoweredAddress(i->getBase());
|
|
Explosion indexValues = getLoweredExplosion(i->getIndex());
|
|
llvm::Value *index = indexValues.claimNext();
|
|
|
|
SILType baseTy = i->getBase()->getType();
|
|
const TypeInfo &baseTI = getTypeInfo(baseTy);
|
|
|
|
Address dest = baseTI.indexArray(*this, base, index, baseTy);
|
|
const TypeInfo &TailTI = getTypeInfo(i->getTailType());
|
|
dest = TailTI.roundUpToTypeAlignment(*this, dest, i->getTailType());
|
|
llvm::Type *destType = TailTI.getStorageType()->getPointerTo();
|
|
dest = Builder.CreateBitCast(dest, destType);
|
|
setLoweredAddress(i, dest);
|
|
}
|
|
|
|
void IRGenSILFunction::visitIndexRawPointerInst(swift::IndexRawPointerInst *i) {
|
|
Explosion baseValues = getLoweredExplosion(i->getBase());
|
|
llvm::Value *base = baseValues.claimNext();
|
|
|
|
Explosion indexValues = getLoweredExplosion(i->getIndex());
|
|
llvm::Value *index = indexValues.claimNext();
|
|
|
|
// We don't expose a non-inbounds GEP operation.
|
|
llvm::Value *destValue = Builder.CreateInBoundsGEP(base, index);
|
|
|
|
Explosion result;
|
|
result.add(destValue);
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocValueBufferInst(
|
|
swift::AllocValueBufferInst *i) {
|
|
Address buffer = getLoweredAddress(i->getOperand());
|
|
auto valueType = i->getValueType();
|
|
Address value = emitAllocateValueInBuffer(*this, valueType, buffer);
|
|
setLoweredAddress(i, value);
|
|
}
|
|
|
|
void IRGenSILFunction::visitProjectValueBufferInst(
|
|
swift::ProjectValueBufferInst *i) {
|
|
Address buffer = getLoweredAddress(i->getOperand());
|
|
auto valueType = i->getValueType();
|
|
Address value = emitProjectValueInBuffer(*this, valueType, buffer);
|
|
setLoweredAddress(i, value);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeallocValueBufferInst(
|
|
swift::DeallocValueBufferInst *i) {
|
|
Address buffer = getLoweredAddress(i->getOperand());
|
|
auto valueType = i->getValueType();
|
|
emitDeallocateValueInBuffer(*this, valueType, buffer);
|
|
}
|
|
|
|
void IRGenSILFunction::visitInitExistentialAddrInst(swift::InitExistentialAddrInst *i) {
|
|
Address container = getLoweredAddress(i->getOperand());
|
|
SILType destType = i->getOperand()->getType();
|
|
emitOpaqueExistentialContainerInit(
|
|
*this, container, destType, i->getFormalConcreteType(),
|
|
i->getLoweredConcreteType(), i->getConformances());
|
|
auto srcType = i->getLoweredConcreteType();
|
|
|
|
// Allocate a COW box for the value if necessary.
|
|
auto *genericEnv = CurSILFn->getGenericEnvironment();
|
|
setLoweredAddress(
|
|
i, emitAllocateBoxedOpaqueExistentialBuffer(
|
|
*this, destType, srcType, container, genericEnv, false));
|
|
}
|
|
|
|
void IRGenSILFunction::visitInitExistentialValueInst(
|
|
swift::InitExistentialValueInst *i) {
|
|
llvm_unreachable("unsupported instruction during IRGen");
|
|
}
|
|
|
|
void IRGenSILFunction::visitInitExistentialMetatypeInst(
|
|
InitExistentialMetatypeInst *i) {
|
|
Explosion metatype = getLoweredExplosion(i->getOperand());
|
|
Explosion result;
|
|
emitExistentialMetatypeContainer(*this,
|
|
result, i->getType(),
|
|
metatype.claimNext(),
|
|
i->getOperand()->getType(),
|
|
i->getConformances());
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitInitExistentialRefInst(InitExistentialRefInst *i) {
|
|
Explosion instance = getLoweredExplosion(i->getOperand());
|
|
Explosion result;
|
|
emitClassExistentialContainer(*this,
|
|
result, i->getType(),
|
|
instance.claimNext(),
|
|
i->getFormalConcreteType(),
|
|
i->getOperand()->getType(),
|
|
i->getConformances());
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeinitExistentialAddrInst(
|
|
swift::DeinitExistentialAddrInst *i) {
|
|
Address container = getLoweredAddress(i->getOperand());
|
|
|
|
// Deallocate the COW box for the value if necessary.
|
|
emitDeallocateBoxedOpaqueExistentialBuffer(*this, i->getOperand()->getType(),
|
|
container);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeinitExistentialValueInst(
|
|
swift::DeinitExistentialValueInst *i) {
|
|
llvm_unreachable("unsupported instruction during IRGen");
|
|
}
|
|
|
|
void IRGenSILFunction::visitOpenExistentialAddrInst(OpenExistentialAddrInst *i) {
|
|
SILType baseTy = i->getOperand()->getType();
|
|
Address base = getLoweredAddress(i->getOperand());
|
|
|
|
auto openedArchetype = cast<ArchetypeType>(
|
|
i->getType().getSwiftRValueType());
|
|
|
|
// Insert a copy of the boxed value for COW semantics if necessary.
|
|
auto accessKind = i->getAccessKind();
|
|
Address object = emitOpaqueBoxedExistentialProjection(
|
|
*this, accessKind, base, baseTy, openedArchetype);
|
|
|
|
setLoweredAddress(i, object);
|
|
}
|
|
|
|
void IRGenSILFunction::visitOpenExistentialRefInst(OpenExistentialRefInst *i) {
|
|
|
|
SILType baseTy = i->getOperand()->getType();
|
|
Explosion base = getLoweredExplosion(i->getOperand());
|
|
auto openedArchetype = cast<ArchetypeType>(
|
|
i->getType().getSwiftRValueType());
|
|
|
|
Explosion result;
|
|
llvm::Value *instance
|
|
= emitClassExistentialProjection(*this, base, baseTy,
|
|
openedArchetype);
|
|
result.add(instance);
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitOpenExistentialMetatypeInst(
|
|
OpenExistentialMetatypeInst *i) {
|
|
SILType baseTy = i->getOperand()->getType();
|
|
Explosion base = getLoweredExplosion(i->getOperand());
|
|
auto openedTy = i->getType().getSwiftRValueType();
|
|
|
|
llvm::Value *metatype =
|
|
emitExistentialMetatypeProjection(*this, base, baseTy, openedTy);
|
|
Explosion result;
|
|
result.add(metatype);
|
|
setLoweredExplosion(i, result);
|
|
}
|
|
|
|
void IRGenSILFunction::visitOpenExistentialValueInst(
|
|
OpenExistentialValueInst *i) {
|
|
llvm_unreachable("unsupported instruction during IRGen");
|
|
}
|
|
|
|
void IRGenSILFunction::visitProjectBlockStorageInst(ProjectBlockStorageInst *i){
|
|
// TODO
|
|
Address block = getLoweredAddress(i->getOperand());
|
|
Address capture = projectBlockStorageCapture(*this, block,
|
|
i->getOperand()->getType().castTo<SILBlockStorageType>());
|
|
|
|
setLoweredAddress(i, capture);
|
|
}
|
|
|
|
void IRGenSILFunction::visitInitBlockStorageHeaderInst(
|
|
InitBlockStorageHeaderInst *i) {
|
|
auto addr = getLoweredAddress(i->getBlockStorage());
|
|
|
|
// We currently only support static invoke functions.
|
|
auto &invokeVal = getLoweredValue(i->getInvokeFunction());
|
|
llvm::Constant *invokeFn = nullptr;
|
|
ForeignFunctionInfo foreignInfo;
|
|
if (invokeVal.kind != LoweredValue::Kind::FunctionPointer) {
|
|
IGM.unimplemented(i->getLoc().getSourceLoc(),
|
|
"non-static block invoke function");
|
|
} else {
|
|
auto &fn = invokeVal.getFunctionPointer();
|
|
invokeFn = fn.getDirectPointer();
|
|
foreignInfo = fn.getForeignInfo();
|
|
}
|
|
|
|
assert(foreignInfo.ClangInfo && "no clang info for block function?");
|
|
|
|
// Initialize the header.
|
|
emitBlockHeader(*this, addr,
|
|
i->getBlockStorage()->getType().castTo<SILBlockStorageType>(),
|
|
invokeFn, i->getInvokeFunction()->getType().castTo<SILFunctionType>(),
|
|
foreignInfo);
|
|
|
|
// Cast the storage to the block type to produce the result value.
|
|
llvm::Value *asBlock = Builder.CreateBitCast(addr.getAddress(),
|
|
IGM.ObjCBlockPtrTy);
|
|
Explosion e;
|
|
e.add(asBlock);
|
|
setLoweredExplosion(i, e);
|
|
}
|
|
|
|
void IRGenSILFunction::visitAllocExistentialBoxInst(AllocExistentialBoxInst *i){
|
|
OwnedAddress boxWithAddr =
|
|
emitBoxedExistentialContainerAllocation(*this, i->getExistentialType(),
|
|
i->getFormalConcreteType(),
|
|
i->getConformances());
|
|
setLoweredBox(i, boxWithAddr);
|
|
}
|
|
|
|
void IRGenSILFunction::visitDeallocExistentialBoxInst(
|
|
DeallocExistentialBoxInst *i) {
|
|
Explosion box = getLoweredExplosion(i->getOperand());
|
|
emitBoxedExistentialContainerDeallocation(*this, box,
|
|
i->getOperand()->getType(),
|
|
i->getConcreteType());
|
|
}
|
|
|
|
void IRGenSILFunction::visitOpenExistentialBoxInst(OpenExistentialBoxInst *i) {
|
|
Explosion box = getLoweredExplosion(i->getOperand());
|
|
auto openedArchetype = cast<ArchetypeType>(i->getType().getSwiftRValueType());
|
|
|
|
auto addr = emitOpenExistentialBox(*this, box, i->getOperand()->getType(),
|
|
openedArchetype);
|
|
setLoweredAddress(i, addr);
|
|
}
|
|
|
|
void IRGenSILFunction::visitOpenExistentialBoxValueInst(
|
|
OpenExistentialBoxValueInst *i) {
|
|
llvm_unreachable("unsupported instruction during IRGen");
|
|
}
|
|
|
|
void
|
|
IRGenSILFunction::visitProjectExistentialBoxInst(ProjectExistentialBoxInst *i) {
|
|
const LoweredValue &val = getLoweredValue(i->getOperand());
|
|
if (val.isBoxWithAddress()) {
|
|
// The operand is an alloc_existential_box.
|
|
// We can directly reuse the address.
|
|
setLoweredAddress(i, val.getAddressOfBox());
|
|
} else {
|
|
Explosion box = getLoweredExplosion(i->getOperand());
|
|
auto caddr = emitBoxedExistentialProjection(*this, box,
|
|
i->getOperand()->getType(),
|
|
i->getType().getSwiftRValueType());
|
|
setLoweredAddress(i, caddr.getAddress());
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitWitnessMethodInst(swift::WitnessMethodInst *i) {
|
|
CanType baseTy = i->getLookupType();
|
|
ProtocolConformanceRef conformance = i->getConformance();
|
|
SILDeclRef member = i->getMember();
|
|
|
|
auto fnType = i->getType().castTo<SILFunctionType>();
|
|
|
|
// It would be nice if this weren't discarded.
|
|
llvm::Value *baseMetadataCache = nullptr;
|
|
|
|
auto fn = emitWitnessMethodValue(*this, baseTy, &baseMetadataCache,
|
|
member, conformance, fnType);
|
|
|
|
setLoweredFunctionPointer(i, fn);
|
|
}
|
|
|
|
void IRGenSILFunction::setAllocatedAddressForBuffer(SILValue v,
|
|
const Address &allocedAddress) {
|
|
overwriteAllocatedAddress(v, allocedAddress);
|
|
|
|
// Emit the debug info for the variable if any.
|
|
if (auto allocStack = dyn_cast<AllocStackInst>(v)) {
|
|
emitDebugInfoForAllocStack(allocStack, getTypeInfo(v->getType()),
|
|
allocedAddress.getAddress());
|
|
}
|
|
}
|
|
|
|
void IRGenSILFunction::visitCopyAddrInst(swift::CopyAddrInst *i) {
|
|
SILType addrTy = i->getSrc()->getType();
|
|
const TypeInfo &addrTI = getTypeInfo(addrTy);
|
|
Address src = getLoweredAddress(i->getSrc());
|
|
// See whether we have a deferred fixed-size buffer initialization.
|
|
auto &loweredDest = getLoweredValue(i->getDest());
|
|
assert(!loweredDest.isUnallocatedAddressInBuffer());
|
|
Address dest = loweredDest.getAnyAddress();
|
|
if (i->isInitializationOfDest()) {
|
|
if (i->isTakeOfSrc()) {
|
|
addrTI.initializeWithTake(*this, dest, src, addrTy, false);
|
|
} else {
|
|
addrTI.initializeWithCopy(*this, dest, src, addrTy, false);
|
|
}
|
|
} else {
|
|
if (i->isTakeOfSrc()) {
|
|
addrTI.assignWithTake(*this, dest, src, addrTy, false);
|
|
} else {
|
|
addrTI.assignWithCopy(*this, dest, src, addrTy, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
// This is a no-op because we do not lower Swift TBAA info to LLVM IR, and it
|
|
// does not produce any values.
|
|
void IRGenSILFunction::visitBindMemoryInst(swift::BindMemoryInst *) {}
|
|
|
|
void IRGenSILFunction::visitDestroyAddrInst(swift::DestroyAddrInst *i) {
|
|
SILType addrTy = i->getOperand()->getType();
|
|
const TypeInfo &addrTI = getTypeInfo(addrTy);
|
|
|
|
Address base = getLoweredAddress(i->getOperand());
|
|
addrTI.destroy(*this, base, addrTy, false /*isOutlined*/);
|
|
}
|
|
|
|
void IRGenSILFunction::visitCondFailInst(swift::CondFailInst *i) {
|
|
Explosion e = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *cond = e.claimNext();
|
|
|
|
// Emit individual fail blocks so that we can map the failure back to a source
|
|
// line.
|
|
llvm::BasicBlock *failBB = llvm::BasicBlock::Create(IGM.getLLVMContext());
|
|
llvm::BasicBlock *contBB = llvm::BasicBlock::Create(IGM.getLLVMContext());
|
|
Builder.CreateCondBr(cond, failBB, contBB);
|
|
Builder.emitBlock(failBB);
|
|
|
|
if (IGM.IRGen.Opts.shouldOptimize()) {
|
|
// Emit unique side-effecting inline asm calls in order to eliminate
|
|
// the possibility that an LLVM optimization or code generation pass
|
|
// will merge these blocks back together again. We emit an empty asm
|
|
// string with the side-effect flag set, and with a unique integer
|
|
// argument for each cond_fail we see in the function.
|
|
llvm::IntegerType *asmArgTy = IGM.Int32Ty;
|
|
llvm::Type *argTys = { asmArgTy };
|
|
llvm::FunctionType *asmFnTy =
|
|
llvm::FunctionType::get(IGM.VoidTy, argTys, false /* = isVarArg */);
|
|
llvm::InlineAsm *inlineAsm =
|
|
llvm::InlineAsm::get(asmFnTy, "", "n", true /* = SideEffects */);
|
|
Builder.CreateAsmCall(inlineAsm,
|
|
llvm::ConstantInt::get(asmArgTy, NumCondFails++));
|
|
}
|
|
|
|
// Emit the trap instruction.
|
|
llvm::Function *trapIntrinsic =
|
|
llvm::Intrinsic::getDeclaration(&IGM.Module, llvm::Intrinsic::ID::trap);
|
|
Builder.CreateCall(trapIntrinsic, {});
|
|
Builder.CreateUnreachable();
|
|
Builder.emitBlock(contBB);
|
|
FailBBs.push_back(failBB);
|
|
}
|
|
|
|
void IRGenSILFunction::visitSuperMethodInst(swift::SuperMethodInst *i) {
|
|
assert(!i->getMember().isForeign);
|
|
|
|
auto base = getLoweredExplosion(i->getOperand());
|
|
auto baseType = i->getOperand()->getType();
|
|
llvm::Value *baseValue = base.claimNext();
|
|
|
|
auto method = i->getMember();
|
|
auto methodType = i->getType().castTo<SILFunctionType>();
|
|
|
|
auto fn = emitVirtualMethodValue(*this, baseValue, baseType,
|
|
method, methodType,
|
|
/*useSuperVTable*/ true);
|
|
|
|
setLoweredFunctionPointer(i, fn);
|
|
}
|
|
|
|
void IRGenSILFunction::visitObjCSuperMethodInst(swift::ObjCSuperMethodInst *i) {
|
|
assert(i->getMember().isForeign);
|
|
setLoweredObjCMethodBounded(i, i->getMember(),
|
|
i->getOperand()->getType(),
|
|
/*startAtSuper=*/true);
|
|
}
|
|
|
|
void IRGenSILFunction::visitClassMethodInst(swift::ClassMethodInst *i) {
|
|
assert(!i->getMember().isForeign);
|
|
|
|
Explosion base = getLoweredExplosion(i->getOperand());
|
|
llvm::Value *baseValue = base.claimNext();
|
|
|
|
SILDeclRef method = i->getMember();
|
|
auto methodType = i->getType().castTo<SILFunctionType>();
|
|
|
|
// For Swift classes, get the method implementation from the vtable.
|
|
// FIXME: better explosion kind, map as static.
|
|
FunctionPointer fn = emitVirtualMethodValue(*this, baseValue,
|
|
i->getOperand()->getType(),
|
|
method, methodType,
|
|
/*useSuperVTable*/ false);
|
|
|
|
setLoweredFunctionPointer(i, fn);
|
|
}
|
|
|
|
void IRGenSILFunction::visitObjCMethodInst(swift::ObjCMethodInst *i) {
|
|
// For Objective-C classes we need to arrange for a msgSend
|
|
// to happen when the method is called.
|
|
assert(i->getMember().isForeign);
|
|
setLoweredObjCMethod(i, i->getMember());
|
|
}
|
|
|
|
void IRGenModule::emitSILStaticInitializers() {
|
|
SmallVector<SILFunction *, 8> StaticInitializers;
|
|
for (SILGlobalVariable &Global : getSILModule().getSILGlobals()) {
|
|
SILInstruction *InitValue = Global.getStaticInitializerValue();
|
|
if (!InitValue)
|
|
continue;
|
|
|
|
auto *IRGlobal =
|
|
Module.getGlobalVariable(Global.getName(), true /* = AllowLocal */);
|
|
|
|
// A check for multi-threaded compilation: Is this the llvm module where the
|
|
// global is defined and not only referenced (or not referenced at all).
|
|
if (!IRGlobal || !IRGlobal->hasInitializer())
|
|
continue;
|
|
|
|
if (auto *OI = dyn_cast<ObjectInst>(InitValue)) {
|
|
StructLayout *Layout = StaticObjectLayouts[&Global].get();
|
|
llvm::Constant *InitVal = emitConstantObject(*this, OI, Layout);
|
|
auto *ContainerTy = cast<llvm::StructType>(IRGlobal->getValueType());
|
|
auto *zero = llvm::ConstantAggregateZero::get(ContainerTy->getElementType(0));
|
|
IRGlobal->setInitializer(llvm::ConstantStruct::get(ContainerTy,
|
|
{zero , InitVal}));
|
|
continue;
|
|
}
|
|
|
|
// Set the IR global's initializer to the constant for this SIL
|
|
// struct.
|
|
if (auto *SI = dyn_cast<StructInst>(InitValue)) {
|
|
IRGlobal->setInitializer(emitConstantStruct(*this, SI));
|
|
continue;
|
|
}
|
|
|
|
// Set the IR global's initializer to the constant for this SIL
|
|
// tuple.
|
|
auto *TI = cast<TupleInst>(InitValue);
|
|
IRGlobal->setInitializer(emitConstantTuple(*this, TI));
|
|
}
|
|
}
|