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SILInstructions.cpp
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//===--- SILInstruction.cpp - Instructions for SIL code -------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file defines the high-level SILInstruction classes used for SIL code.
//
//===----------------------------------------------------------------------===//
#include "swift/SIL/SILInstruction.h"
#include "swift/Basic/type_traits.h"
#include "swift/Basic/Unicode.h"
#include "swift/SIL/SILBuilder.h"
#include "swift/SIL/SILCloner.h"
#include "swift/SIL/SILVisitor.h"
#include "swift/AST/AST.h"
#include "swift/Basic/AssertImplements.h"
#include "swift/ClangImporter/ClangModule.h"
#include "swift/SIL/SILModule.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/ErrorHandling.h"
using namespace swift;
using namespace Lowering;
//===----------------------------------------------------------------------===//
// SILInstruction Subclasses
//===----------------------------------------------------------------------===//
// alloc_stack always returns two results: Builtin.RawPointer & LValue[EltTy]
static SILTypeList *getAllocStackType(SILType eltTy, SILFunction &F) {
SILType resTys[] = {
eltTy.getLocalStorageType(),
eltTy.getAddressType()
};
return F.getModule().getSILTypeList(resTys);
}
AllocStackInst::AllocStackInst(SILDebugLocation *Loc, SILType elementType,
SILFunction &F, unsigned ArgNo)
: AllocationInst(ValueKind::AllocStackInst, Loc,
getAllocStackType(elementType, F)), VarInfo(ArgNo) {}
/// getDecl - Return the underlying variable declaration associated with this
/// allocation, or null if this is a temporary allocation.
VarDecl *AllocStackInst::getDecl() const {
return getLoc().getAsASTNode<VarDecl>();
}
AllocRefInst::AllocRefInst(SILDebugLocation *Loc, SILType elementType,
SILFunction &F, bool objc, bool canBeOnStack)
: AllocationInst(ValueKind::AllocRefInst, Loc, elementType),
StackPromotable(canBeOnStack), ObjC(objc) {}
// alloc_box returns two results: Builtin.NativeObject & LValue[EltTy]
static SILTypeList *getAllocBoxType(SILType EltTy, SILFunction &F) {
SILType boxTy = SILType::getPrimitiveObjectType(
SILBoxType::get(EltTy.getSwiftRValueType()));
SILType ResTys[] = {
boxTy,
EltTy.getAddressType()
};
return F.getModule().getSILTypeList(ResTys);
}
AllocBoxInst::AllocBoxInst(SILDebugLocation *Loc, SILType ElementType,
SILFunction &F, unsigned ArgNo)
: AllocationInst(ValueKind::AllocBoxInst, Loc,
getAllocBoxType(ElementType, F)),
VarInfo(ArgNo) {}
/// getDecl - Return the underlying variable declaration associated with this
/// allocation, or null if this is a temporary allocation.
VarDecl *AllocBoxInst::getDecl() const {
return getLoc().getAsASTNode<VarDecl>();
}
VarDecl *DebugValueInst::getDecl() const {
return getLoc().getAsASTNode<VarDecl>();
}
VarDecl *DebugValueAddrInst::getDecl() const {
return getLoc().getAsASTNode<VarDecl>();
}
static SILTypeList *getAllocExistentialBoxType(SILType ExistTy,
SILType ConcreteTy,
SILFunction &F) {
SILType Tys[] = {
ExistTy.getObjectType(),
ConcreteTy.getAddressType(),
};
return F.getModule().getSILTypeList(Tys);
}
AllocExistentialBoxInst::AllocExistentialBoxInst(
SILDebugLocation *Loc, SILType ExistentialType, CanType ConcreteType,
SILType ConcreteLoweredType, ArrayRef<ProtocolConformance *> Conformances,
SILFunction *Parent)
: AllocationInst(ValueKind::AllocExistentialBoxInst, Loc,
getAllocExistentialBoxType(ExistentialType,
ConcreteLoweredType, *Parent)),
ConcreteType(ConcreteType), Conformances(Conformances) {}
static void declareWitnessTable(SILModule &Mod,
ProtocolConformance *C) {
if (!C) return;
if (!Mod.lookUpWitnessTable(C, false).first)
Mod.createWitnessTableDeclaration(C,
TypeConverter::getLinkageForProtocolConformance(
C->getRootNormalConformance(),
NotForDefinition));
}
AllocExistentialBoxInst *AllocExistentialBoxInst::create(
SILDebugLocation *Loc, SILType ExistentialType, CanType ConcreteType,
SILType ConcreteLoweredType, ArrayRef<ProtocolConformance *> Conformances,
SILFunction *F) {
SILModule &Mod = F->getModule();
void *Buffer = Mod.allocateInst(sizeof(AllocExistentialBoxInst),
alignof(AllocExistentialBoxInst));
for (ProtocolConformance *C : Conformances)
declareWitnessTable(Mod, C);
return ::new (Buffer) AllocExistentialBoxInst(Loc,
ExistentialType,
ConcreteType,
ConcreteLoweredType,
Conformances, F);
}
BuiltinInst *BuiltinInst::create(SILDebugLocation *Loc, Identifier Name,
SILType ReturnType,
ArrayRef<Substitution> Substitutions,
ArrayRef<SILValue> Args,
SILFunction &F) {
void *Buffer = F.getModule().allocateInst(
sizeof(BuiltinInst)
+ decltype(Operands)::getExtraSize(Args.size())
+ sizeof(Substitution) * Substitutions.size(),
alignof(BuiltinInst));
return ::new (Buffer) BuiltinInst(Loc, Name, ReturnType, Substitutions,
Args);
}
BuiltinInst::BuiltinInst(SILDebugLocation *Loc, Identifier Name,
SILType ReturnType, ArrayRef<Substitution> Subs,
ArrayRef<SILValue> Args)
: SILInstruction(ValueKind::BuiltinInst, Loc, ReturnType), Name(Name),
NumSubstitutions(Subs.size()), Operands(this, Args) {
static_assert(IsTriviallyCopyable<Substitution>::value,
"assuming Substitution is trivially copyable");
memcpy(getSubstitutionsStorage(), Subs.begin(),
sizeof(Substitution) * Subs.size());
}
ApplyInst::ApplyInst(SILDebugLocation *Loc, SILValue Callee,
SILType SubstCalleeTy, SILType Result,
ArrayRef<Substitution> Subs, ArrayRef<SILValue> Args,
bool isNonThrowing)
: ApplyInstBase(ValueKind::ApplyInst, Loc, Callee, SubstCalleeTy, Subs,
Args, Result) {
setNonThrowing(isNonThrowing);
}
ApplyInst *ApplyInst::create(SILDebugLocation *Loc, SILValue Callee,
SILType SubstCalleeTy, SILType Result,
ArrayRef<Substitution> Subs,
ArrayRef<SILValue> Args, bool isNonThrowing,
SILFunction &F) {
void *Buffer = allocate(F, Subs, Args);
return ::new(Buffer) ApplyInst(Loc, Callee, SubstCalleeTy,
Result, Subs, Args, isNonThrowing);
}
bool swift::doesApplyCalleeHaveSemantics(SILValue callee, StringRef semantics) {
if (auto *FRI = dyn_cast<FunctionRefInst>(callee))
if (auto *F = FRI->getReferencedFunction())
return F->hasSemanticsString(semantics);
return false;
}
void *swift::allocateApplyInst(SILFunction &F, size_t size, size_t alignment) {
return F.getModule().allocateInst(size, alignment);
}
PartialApplyInst::PartialApplyInst(SILDebugLocation *Loc, SILValue Callee,
SILType SubstCalleeTy,
ArrayRef<Substitution> Subs,
ArrayRef<SILValue> Args, SILType ClosureType)
// FIXME: the callee should have a lowered SIL function type, and
// PartialApplyInst
// should derive the type of its result by partially applying the callee's
// type.
: ApplyInstBase(ValueKind::PartialApplyInst, Loc, Callee, SubstCalleeTy,
Subs, Args, ClosureType) {}
PartialApplyInst *
PartialApplyInst::create(SILDebugLocation *Loc, SILValue Callee,
SILType SubstCalleeTy, ArrayRef<Substitution> Subs,
ArrayRef<SILValue> Args, SILType ClosureType,
SILFunction &F) {
void *Buffer = allocate(F, Subs, Args);
return ::new(Buffer) PartialApplyInst(Loc, Callee, SubstCalleeTy,
Subs, Args, ClosureType);
}
TryApplyInstBase::TryApplyInstBase(ValueKind valueKind, SILDebugLocation *Loc,
SILBasicBlock *normalBB,
SILBasicBlock *errorBB)
: TermInst(valueKind, Loc), DestBBs{{this, normalBB}, {this, errorBB}} {}
TryApplyInst::TryApplyInst(SILDebugLocation *Loc, SILValue callee,
SILType substCalleeTy, ArrayRef<Substitution> subs,
ArrayRef<SILValue> args, SILBasicBlock *normalBB,
SILBasicBlock *errorBB)
: ApplyInstBase(ValueKind::TryApplyInst, Loc, callee, substCalleeTy, subs,
args, normalBB, errorBB) {}
TryApplyInst *TryApplyInst::create(SILDebugLocation *Loc, SILValue callee,
SILType substCalleeTy,
ArrayRef<Substitution> subs,
ArrayRef<SILValue> args,
SILBasicBlock *normalBB,
SILBasicBlock *errorBB, SILFunction &F) {
void *buffer = allocate(F, subs, args);
return ::new (buffer)
TryApplyInst(Loc, callee, substCalleeTy, subs, args, normalBB, errorBB);
}
FunctionRefInst::FunctionRefInst(SILDebugLocation *Loc, SILFunction *F)
: LiteralInst(ValueKind::FunctionRefInst, Loc, F->getLoweredType()),
Function(F) {
F->incrementRefCount();
}
FunctionRefInst::~FunctionRefInst() {
if (Function)
Function->decrementRefCount();
}
void FunctionRefInst::dropReferencedFunction() {
if (Function)
Function->decrementRefCount();
Function = nullptr;
}
GlobalAddrInst::GlobalAddrInst(SILDebugLocation *Loc, SILGlobalVariable *Global)
: LiteralInst(ValueKind::GlobalAddrInst, Loc,
Global->getLoweredType().getAddressType()),
Global(Global) {}
GlobalAddrInst::GlobalAddrInst(SILDebugLocation *Loc, SILType Ty)
: LiteralInst(ValueKind::GlobalAddrInst, Loc, Ty), Global(nullptr) {}
const IntrinsicInfo &BuiltinInst::getIntrinsicInfo() const {
return getModule().getIntrinsicInfo(getName());
}
const BuiltinInfo &BuiltinInst::getBuiltinInfo() const {
return getModule().getBuiltinInfo(getName());
}
static unsigned getWordsForBitWidth(unsigned bits) {
return (bits + llvm::integerPartWidth - 1)/llvm::integerPartWidth;
}
template<typename INST>
static void *allocateLiteralInstWithTextSize(SILFunction &F, unsigned length) {
return F.getModule().allocateInst(sizeof(INST) + length, alignof(INST));
}
template<typename INST>
static void *allocateLiteralInstWithBitSize(SILFunction &F, unsigned bits) {
unsigned words = getWordsForBitWidth(bits);
return F.getModule().allocateInst(
sizeof(INST) + sizeof(llvm::integerPart)*words, alignof(INST));
}
IntegerLiteralInst::IntegerLiteralInst(SILDebugLocation *Loc, SILType Ty,
const llvm::APInt &Value)
: LiteralInst(ValueKind::IntegerLiteralInst, Loc, Ty),
numBits(Value.getBitWidth()) {
memcpy(this + 1, Value.getRawData(),
Value.getNumWords() * sizeof(llvm::integerPart));
}
IntegerLiteralInst *IntegerLiteralInst::create(SILDebugLocation *Loc,
SILType Ty, const APInt &Value,
SILFunction &B) {
auto intTy = Ty.castTo<BuiltinIntegerType>();
assert(intTy->getGreatestWidth() == Value.getBitWidth() &&
"IntegerLiteralInst APInt value's bit width doesn't match type");
(void)intTy;
void *buf = allocateLiteralInstWithBitSize<IntegerLiteralInst>(B,
Value.getBitWidth());
return ::new (buf) IntegerLiteralInst(Loc, Ty, Value);
}
IntegerLiteralInst *IntegerLiteralInst::create(SILDebugLocation *Loc,
SILType Ty, intmax_t Value,
SILFunction &B) {
auto intTy = Ty.castTo<BuiltinIntegerType>();
return create(Loc, Ty,
APInt(intTy->getGreatestWidth(), Value), B);
}
IntegerLiteralInst *IntegerLiteralInst::create(IntegerLiteralExpr *E,
SILDebugLocation *Loc,
SILFunction &F) {
return create(
Loc, SILType::getBuiltinIntegerType(
E->getType()->castTo<BuiltinIntegerType>()->getGreatestWidth(),
F.getASTContext()),
E->getValue(), F);
}
/// getValue - Return the APInt for the underlying integer literal.
APInt IntegerLiteralInst::getValue() const {
return APInt(numBits,
{reinterpret_cast<const llvm::integerPart *>(this + 1),
getWordsForBitWidth(numBits)});
}
FloatLiteralInst::FloatLiteralInst(SILDebugLocation *Loc, SILType Ty,
const APInt &Bits)
: LiteralInst(ValueKind::FloatLiteralInst, Loc, Ty),
numBits(Bits.getBitWidth()) {
memcpy(this + 1, Bits.getRawData(),
Bits.getNumWords() * sizeof(llvm::integerPart));
}
FloatLiteralInst *FloatLiteralInst::create(SILDebugLocation *Loc, SILType Ty,
const APFloat &Value,
SILFunction &B) {
auto floatTy = Ty.castTo<BuiltinFloatType>();
assert(&floatTy->getAPFloatSemantics() == &Value.getSemantics() &&
"FloatLiteralInst value's APFloat semantics do not match type");
(void)floatTy;
APInt Bits = Value.bitcastToAPInt();
void *buf = allocateLiteralInstWithBitSize<FloatLiteralInst>(B,
Bits.getBitWidth());
return ::new (buf) FloatLiteralInst(Loc, Ty, Bits);
}
FloatLiteralInst *FloatLiteralInst::create(FloatLiteralExpr *E,
SILDebugLocation *Loc,
SILFunction &F) {
return create(Loc,
// Builtin floating-point types are always valid SIL types.
SILType::getBuiltinFloatType(
E->getType()->castTo<BuiltinFloatType>()->getFPKind(),
F.getASTContext()),
E->getValue(), F);
}
APInt FloatLiteralInst::getBits() const {
return APInt(numBits,
{reinterpret_cast<const llvm::integerPart *>(this + 1),
getWordsForBitWidth(numBits)});
}
APFloat FloatLiteralInst::getValue() const {
return APFloat(getType().castTo<BuiltinFloatType>()->getAPFloatSemantics(),
getBits());
}
StringLiteralInst::StringLiteralInst(SILDebugLocation *Loc, StringRef Text,
Encoding encoding, SILType Ty)
: LiteralInst(ValueKind::StringLiteralInst, Loc, Ty), Length(Text.size()),
TheEncoding(encoding) {
memcpy(this + 1, Text.data(), Text.size());
}
StringLiteralInst *StringLiteralInst::create(SILDebugLocation *Loc,
StringRef text, Encoding encoding,
SILFunction &F) {
void *buf
= allocateLiteralInstWithTextSize<StringLiteralInst>(F, text.size());
auto Ty = SILType::getRawPointerType(F.getModule().getASTContext());
return ::new (buf) StringLiteralInst(Loc, text, encoding, Ty);
}
uint64_t StringLiteralInst::getCodeUnitCount() {
if (TheEncoding == Encoding::UTF16)
return unicode::getUTF16Length(getValue());
return Length;
}
StoreInst::StoreInst(SILDebugLocation *Loc, SILValue Src, SILValue Dest)
: SILInstruction(ValueKind::StoreInst, Loc), Operands(this, Src, Dest) {}
AssignInst::AssignInst(SILDebugLocation *Loc, SILValue Src, SILValue Dest)
: SILInstruction(ValueKind::AssignInst, Loc), Operands(this, Src, Dest) {}
MarkFunctionEscapeInst *
MarkFunctionEscapeInst::create(SILDebugLocation *Loc,
ArrayRef<SILValue> Elements, SILFunction &F) {
void *Buffer = F.getModule().allocateInst(sizeof(MarkFunctionEscapeInst) +
decltype(Operands)::getExtraSize(Elements.size()),
alignof(MarkFunctionEscapeInst));
return ::new(Buffer) MarkFunctionEscapeInst(Loc, Elements);
}
MarkFunctionEscapeInst::MarkFunctionEscapeInst(SILDebugLocation *Loc,
ArrayRef<SILValue> Elems)
: SILInstruction(ValueKind::MarkFunctionEscapeInst, Loc),
Operands(this, Elems) {}
static SILType getPinResultType(SILType operandType) {
return SILType::getPrimitiveObjectType(
OptionalType::get(operandType.getSwiftRValueType())->getCanonicalType());
}
StrongPinInst::StrongPinInst(SILDebugLocation *Loc, SILValue operand)
: UnaryInstructionBase(Loc, operand, getPinResultType(operand.getType())) {}
CopyAddrInst::CopyAddrInst(SILDebugLocation *Loc, SILValue SrcLValue,
SILValue DestLValue, IsTake_t isTakeOfSrc,
IsInitialization_t isInitializationOfDest)
: SILInstruction(ValueKind::CopyAddrInst, Loc), IsTakeOfSrc(isTakeOfSrc),
IsInitializationOfDest(isInitializationOfDest),
Operands(this, SrcLValue, DestLValue) {}
UncheckedRefCastAddrInst::UncheckedRefCastAddrInst(SILDebugLocation *Loc,
SILValue src,
CanType srcType,
SILValue dest,
CanType targetType)
: SILInstruction(ValueKind::UncheckedRefCastAddrInst, Loc),
Operands(this, src, dest), SourceType(srcType), TargetType(targetType) {}
UnconditionalCheckedCastAddrInst::UnconditionalCheckedCastAddrInst(
SILDebugLocation *Loc, CastConsumptionKind consumption, SILValue src,
CanType srcType, SILValue dest, CanType targetType)
: SILInstruction(ValueKind::UnconditionalCheckedCastAddrInst, Loc),
Operands(this, src, dest), ConsumptionKind(consumption),
SourceType(srcType), TargetType(targetType) {}
StructInst *StructInst::create(SILDebugLocation *Loc, SILType Ty,
ArrayRef<SILValue> Elements, SILFunction &F) {
void *Buffer = F.getModule().allocateInst(sizeof(StructInst) +
decltype(Operands)::getExtraSize(Elements.size()),
alignof(StructInst));
return ::new(Buffer) StructInst(Loc, Ty, Elements);
}
StructInst::StructInst(SILDebugLocation *Loc, SILType Ty,
ArrayRef<SILValue> Elems)
: SILInstruction(ValueKind::StructInst, Loc, Ty), Operands(this, Elems) {
assert(!Ty.getStructOrBoundGenericStruct()->hasUnreferenceableStorage());
}
TupleInst *TupleInst::create(SILDebugLocation *Loc, SILType Ty,
ArrayRef<SILValue> Elements, SILFunction &F) {
void *Buffer = F.getModule().allocateInst(sizeof(TupleInst) +
decltype(Operands)::getExtraSize(Elements.size()),
alignof(TupleInst));
return ::new(Buffer) TupleInst(Loc, Ty, Elements);
}
TupleInst::TupleInst(SILDebugLocation *Loc, SILType Ty,
ArrayRef<SILValue> Elems)
: SILInstruction(ValueKind::TupleInst, Loc, Ty), Operands(this, Elems) {}
MetatypeInst::MetatypeInst(SILDebugLocation *Loc, SILType Metatype)
: SILInstruction(ValueKind::MetatypeInst, Loc, Metatype) {}
bool TupleExtractInst::isTrivialEltOfOneRCIDTuple() const {
SILModule &Mod = getModule();
// If we are not trivial, bail.
if (!getType().isTrivial(Mod))
return false;
// If the elt we are extracting is trivial, we can not have any non trivial
// fields.
if (getOperand().getType().isTrivial(Mod))
return false;
// Ok, now we know that our tuple has non-trivial fields. Make sure that our
// parent tuple has only one non-trivial field.
bool FoundNonTrivialField = false;
SILType OpTy = getOperand().getType();
unsigned FieldNo = getFieldNo();
// For each element index of the tuple...
for (unsigned i = 0, e = getNumTupleElts(); i != e; ++i) {
// If the element index is the one we are extracting, skip it...
if (i == FieldNo)
continue;
// Otherwise check if we have a non-trivial type. If we don't have one,
// continue.
if (OpTy.getTupleElementType(i).isTrivial(Mod))
continue;
// Ok, this type is non-trivial. If we have not seen a non-trivial field
// yet, set the FoundNonTrivialField flag.
if (!FoundNonTrivialField) {
FoundNonTrivialField = true;
continue;
}
// If we have seen a field and thus the FoundNonTrivialField flag is set,
// return false.
return false;
}
// We found only one trivial field.
assert(FoundNonTrivialField && "Tuple is non-trivial, but does not have a "
"non-trivial element?!");
return true;
}
bool TupleExtractInst::isEltOnlyNonTrivialElt() const {
SILModule &Mod = getModule();
// If the elt we are extracting is trivial, we can not be a non-trivial
// field... return false.
if (getType().isTrivial(Mod))
return false;
// Ok, we know that the elt we are extracting is non-trivial. Make sure that
// we have no other non-trivial elts.
SILType OpTy = getOperand().getType();
unsigned FieldNo = getFieldNo();
// For each element index of the tuple...
for (unsigned i = 0, e = getNumTupleElts(); i != e; ++i) {
// If the element index is the one we are extracting, skip it...
if (i == FieldNo)
continue;
// Otherwise check if we have a non-trivial type. If we don't have one,
// continue.
if (OpTy.getTupleElementType(i).isTrivial(Mod))
continue;
// If we do have a non-trivial type, return false. We have multiple
// non-trivial types violating our condition.
return false;
}
// We checked every other elt of the tuple and did not find any
// non-trivial elt except for ourselves. Return true.
return true;
}
bool StructExtractInst::isTrivialFieldOfOneRCIDStruct() const {
SILModule &Mod = getModule();
// If we are not trivial, bail.
if (!getType().isTrivial(Mod))
return false;
SILType StructTy = getOperand().getType();
// If the elt we are extracting is trivial, we can not have any non trivial
// fields.
if (StructTy.isTrivial(Mod))
return false;
// Ok, now we know that our tuple has non-trivial fields. Make sure that our
// parent tuple has only one non-trivial field.
bool FoundNonTrivialField = false;
// For each element index of the tuple...
for (VarDecl *D : getStructDecl()->getStoredProperties()) {
// If the field is the one we are extracting, skip it...
if (Field == D)
continue;
// Otherwise check if we have a non-trivial type. If we don't have one,
// continue.
if (StructTy.getFieldType(D, Mod).isTrivial(Mod))
continue;
// Ok, this type is non-trivial. If we have not seen a non-trivial field
// yet, set the FoundNonTrivialField flag.
if (!FoundNonTrivialField) {
FoundNonTrivialField = true;
continue;
}
// If we have seen a field and thus the FoundNonTrivialField flag is set,
// return false.
return false;
}
// We found only one trivial field.
assert(FoundNonTrivialField && "Struct is non-trivial, but does not have a "
"non-trivial field?!");
return true;
}
/// Return true if we are extracting the only non-trivial field of out parent
/// struct. This implies that a ref count operation on the aggregate is
/// equivalent to a ref count operation on this field.
bool StructExtractInst::isFieldOnlyNonTrivialField() const {
SILModule &Mod = getModule();
// If the field we are extracting is trivial, we can not be a non-trivial
// field... return false.
if (getType().isTrivial(Mod))
return false;
SILType StructTy = getOperand().getType();
// Ok, we are visiting a non-trivial field. Then for every stored field...
for (VarDecl *D : getStructDecl()->getStoredProperties()) {
// If we are visiting our own field continue.
if (Field == D)
continue;
// Ok, we have a field that is not equal to the field we are
// extracting. If that field is trivial, we do not care about
// it... continue.
if (StructTy.getFieldType(D, Mod).isTrivial(Mod))
continue;
// We have found a non trivial member that is not the member we are
// extracting, fail.
return false;
}
// We checked every other field of the struct and did not find any
// non-trivial fields except for ourselves. Return true.
return true;
}
//===----------------------------------------------------------------------===//
// Instructions representing terminators
//===----------------------------------------------------------------------===//
TermInst::SuccessorListTy TermInst::getSuccessors() {
#define TERMINATOR(TYPE, PARENT, EFFECT, RELEASING) \
if (auto I = dyn_cast<TYPE>(this)) \
return I->getSuccessors();
#include "swift/SIL/SILNodes.def"
llvm_unreachable("not a terminator?!");
}
BranchInst::BranchInst(SILDebugLocation *Loc, SILBasicBlock *DestBB,
ArrayRef<SILValue> Args)
: TermInst(ValueKind::BranchInst, Loc), DestBB(this, DestBB),
Operands(this, Args) {}
BranchInst *BranchInst::create(SILDebugLocation *Loc, SILBasicBlock *DestBB,
SILFunction &F) {
return create(Loc, DestBB, {}, F);
}
BranchInst *BranchInst::create(SILDebugLocation *Loc,
SILBasicBlock *DestBB, ArrayRef<SILValue> Args,
SILFunction &F) {
void *Buffer = F.getModule().allocateInst(sizeof(BranchInst) +
decltype(Operands)::getExtraSize(Args.size()),
alignof(BranchInst));
return ::new (Buffer) BranchInst(Loc, DestBB, Args);
}
CondBranchInst::CondBranchInst(SILDebugLocation *Loc, SILValue Condition,
SILBasicBlock *TrueBB, SILBasicBlock *FalseBB,
ArrayRef<SILValue> Args, unsigned NumTrue,
unsigned NumFalse)
: TermInst(ValueKind::CondBranchInst, Loc),
DestBBs{{this, TrueBB}, {this, FalseBB}}, NumTrueArgs(NumTrue),
NumFalseArgs(NumFalse), Operands(this, Args, Condition) {
assert(Args.size() == (NumTrueArgs + NumFalseArgs) &&
"Invalid number of args");
assert(TrueBB != FalseBB && "Identical destinations");
}
CondBranchInst *CondBranchInst::create(SILDebugLocation *Loc,
SILValue Condition,
SILBasicBlock *TrueBB,
SILBasicBlock *FalseBB, SILFunction &F) {
return create(Loc, Condition, TrueBB, {}, FalseBB, {}, F);
}
CondBranchInst *
CondBranchInst::create(SILDebugLocation *Loc, SILValue Condition,
SILBasicBlock *TrueBB, ArrayRef<SILValue> TrueArgs,
SILBasicBlock *FalseBB, ArrayRef<SILValue> FalseArgs,
SILFunction &F) {
SmallVector<SILValue, 4> Args;
Args.append(TrueArgs.begin(), TrueArgs.end());
Args.append(FalseArgs.begin(), FalseArgs.end());
void *Buffer = F.getModule().allocateInst(sizeof(CondBranchInst) +
decltype(Operands)::getExtraSize(Args.size()),
alignof(CondBranchInst));
return ::new (Buffer) CondBranchInst(Loc, Condition, TrueBB, FalseBB, Args,
TrueArgs.size(), FalseArgs.size());
}
OperandValueArrayRef CondBranchInst::getTrueArgs() const {
return Operands.asValueArray().slice(1, NumTrueArgs);
}
OperandValueArrayRef CondBranchInst::getFalseArgs() const {
return Operands.asValueArray().slice(1 + NumTrueArgs, NumFalseArgs);
}
SILValue
CondBranchInst::getArgForDestBB(SILBasicBlock *DestBB, SILArgument *A) {
// If TrueBB and FalseBB equal, we can not find an arg for this DestBB so
// return an empty SILValue.
if (getTrueBB() == getFalseBB()) {
assert(DestBB == getTrueBB() && "DestBB is not a target of this cond_br");
return SILValue();
}
unsigned i = A->getIndex();
if (DestBB == getTrueBB())
return Operands[1 + i].get();
assert(DestBB == getFalseBB()
&& "By process of elimination BB must be false BB");
return Operands[1 + NumTrueArgs + i].get();
}
ArrayRef<Operand> CondBranchInst::getTrueOperands() const {
if (NumTrueArgs == 0)
return ArrayRef<Operand>();
return ArrayRef<Operand>(&Operands[1], NumTrueArgs);
}
MutableArrayRef<Operand> CondBranchInst::getTrueOperands() {
if (NumTrueArgs == 0)
return MutableArrayRef<Operand>();
return MutableArrayRef<Operand>(&Operands[1], NumTrueArgs);
}
ArrayRef<Operand> CondBranchInst::getFalseOperands() const {
if (NumFalseArgs == 0)
return ArrayRef<Operand>();
return ArrayRef<Operand>(&Operands[1+NumTrueArgs], NumFalseArgs);
}
MutableArrayRef<Operand> CondBranchInst::getFalseOperands() {
if (NumFalseArgs == 0)
return MutableArrayRef<Operand>();
return MutableArrayRef<Operand>(&Operands[1+NumTrueArgs], NumFalseArgs);
}
void CondBranchInst::swapSuccessors() {
// Swap our destinations.
SILBasicBlock *First = DestBBs[0].getBB();
DestBBs[0] = DestBBs[1].getBB();
DestBBs[1] = First;
// If we don't have any arguments return.
if (!NumTrueArgs && !NumFalseArgs)
return;
// Otherwise swap our true and false arguments.
MutableArrayRef<Operand> Ops = getAllOperands();
llvm::SmallVector<SILValue, 4> TrueOps;
for (SILValue V : getTrueArgs())
TrueOps.push_back(V);
auto FalseArgs = getFalseArgs();
for (unsigned i = 0, e = NumFalseArgs; i < e; ++i) {
Ops[1+i].set(FalseArgs[i]);
}
for (unsigned i = 0, e = NumTrueArgs; i < e; ++i) {
Ops[1+i+NumFalseArgs].set(TrueOps[i]);
}
// Finally swap the number of arguments that we have.
std::swap(NumTrueArgs, NumFalseArgs);
}
SwitchValueInst::SwitchValueInst(SILDebugLocation *Loc, SILValue Operand,
SILBasicBlock *DefaultBB,
ArrayRef<SILValue> Cases,
ArrayRef<SILBasicBlock *> BBs)
: TermInst(ValueKind::SwitchValueInst, Loc), NumCases(Cases.size()),
HasDefault(bool(DefaultBB)), Operands(this, Cases, Operand) {
// Initialize the successor array.
auto *succs = getSuccessorBuf();
unsigned OperandBitWidth = 0;
if (auto OperandTy = Operand.getType().getAs<BuiltinIntegerType>()) {
OperandBitWidth = OperandTy->getGreatestWidth();
}
for (unsigned i = 0, size = Cases.size(); i < size; ++i) {
if (OperandBitWidth) {
auto *IL = dyn_cast<IntegerLiteralInst>(Cases[i]);
assert(IL && "switch_value case value should be of an integer type");
assert(IL->getValue().getBitWidth() == OperandBitWidth &&
"switch_value case value is not same bit width as operand");
(void)IL;
} else {
auto *FR = dyn_cast<FunctionRefInst>(Cases[i]);
if (!FR) {
if (auto *CF = dyn_cast<ConvertFunctionInst>(Cases[i])) {
FR = dyn_cast<FunctionRefInst>(CF->getOperand());
}
}
assert(FR && "switch_value case value should be a function reference");
}
::new (succs + i) SILSuccessor(this, BBs[i]);
}
if (HasDefault)
::new (succs + NumCases) SILSuccessor(this, DefaultBB);
}
SwitchValueInst::~SwitchValueInst() {
// Destroy the successor records to keep the CFG up to date.
auto *succs = getSuccessorBuf();
for (unsigned i = 0, end = NumCases + HasDefault; i < end; ++i) {
succs[i].~SILSuccessor();
}
}
SwitchValueInst *SwitchValueInst::create(
SILDebugLocation *Loc, SILValue Operand, SILBasicBlock *DefaultBB,
ArrayRef<std::pair<SILValue, SILBasicBlock *>> CaseBBs, SILFunction &F) {
// Allocate enough room for the instruction with tail-allocated data for all
// the case values and the SILSuccessor arrays. There are `CaseBBs.size()`
// SILValues and `CaseBBs.size() + (DefaultBB ? 1 : 0)` successors.
SmallVector<SILValue, 8> Cases;
SmallVector<SILBasicBlock *, 8> BBs;
unsigned numCases = CaseBBs.size();
unsigned numSuccessors = numCases + (DefaultBB ? 1 : 0);
for(auto pair: CaseBBs) {
Cases.push_back(pair.first);
BBs.push_back(pair.second);
}
size_t bufSize = sizeof(SwitchValueInst) +
decltype(Operands)::getExtraSize(Cases.size()) +
sizeof(SILSuccessor) * numSuccessors;
void *buf = F.getModule().allocateInst(bufSize, alignof(SwitchValueInst));
return ::new (buf) SwitchValueInst(Loc, Operand, DefaultBB, Cases, BBs);
}
SelectValueInst::SelectValueInst(SILDebugLocation *Loc, SILValue Operand,
SILType Type, SILValue DefaultResult,
ArrayRef<SILValue> CaseValuesAndResults)
: SelectInstBase(ValueKind::SelectValueInst, Loc, Type,
CaseValuesAndResults.size() / 2, bool(DefaultResult),
CaseValuesAndResults, Operand) {
unsigned OperandBitWidth = 0;
if (auto OperandTy = Operand.getType().getAs<BuiltinIntegerType>()) {
OperandBitWidth = OperandTy->getGreatestWidth();
}
for (unsigned i = 0; i < NumCases; ++i) {
auto *IL = dyn_cast<IntegerLiteralInst>(CaseValuesAndResults[i * 2]);
assert(IL && "select_value case value should be of an integer type");
assert(IL->getValue().getBitWidth() == OperandBitWidth &&
"select_value case value is not same bit width as operand");
(void)IL;
}
}
SelectValueInst::~SelectValueInst() {
}
SelectValueInst *
SelectValueInst::create(SILDebugLocation *Loc, SILValue Operand, SILType Type,
SILValue DefaultResult,
ArrayRef<std::pair<SILValue, SILValue>> CaseValues,
SILFunction &F) {
// Allocate enough room for the instruction with tail-allocated data for all
// the case values and the SILSuccessor arrays. There are `CaseBBs.size()`
// SILValuues and `CaseBBs.size() + (DefaultBB ? 1 : 0)` successors.
SmallVector<SILValue, 8> CaseValuesAndResults;
for (auto pair : CaseValues) {
CaseValuesAndResults.push_back(pair.first);
CaseValuesAndResults.push_back(pair.second);
}
if ((bool)DefaultResult)
CaseValuesAndResults.push_back(DefaultResult);
size_t bufSize = sizeof(SelectValueInst) + decltype(Operands)::getExtraSize(
CaseValuesAndResults.size());
void *buf = F.getModule().allocateInst(bufSize, alignof(SelectValueInst));
return ::new (buf)
SelectValueInst(Loc, Operand, Type, DefaultResult, CaseValuesAndResults);
}
static SmallVector<SILValue, 4>
getCaseOperands(ArrayRef<std::pair<EnumElementDecl*, SILValue>> CaseValues,
SILValue DefaultValue) {
SmallVector<SILValue, 4> result;
for (auto &pair : CaseValues)
result.push_back(pair.second);
if (DefaultValue)
result.push_back(DefaultValue);
return result;
}
SelectEnumInstBase::SelectEnumInstBase(
ValueKind Kind, SILDebugLocation *Loc, SILValue Operand, SILType Ty,
SILValue DefaultValue,
ArrayRef<std::pair<EnumElementDecl *, SILValue>> CaseValues)
: SelectInstBase(Kind, Loc, Ty, CaseValues.size(), bool(DefaultValue),
getCaseOperands(CaseValues, DefaultValue), Operand) {
// Initialize the case and successor arrays.
auto *cases = getCaseBuf();
for (unsigned i = 0, size = CaseValues.size(); i < size; ++i) {
cases[i] = CaseValues[i].first;
}
}
template <typename SELECT_ENUM_INST>
SELECT_ENUM_INST *SelectEnumInstBase::createSelectEnum(
SILDebugLocation *Loc, SILValue Operand, SILType Ty, SILValue DefaultValue,
ArrayRef<std::pair<EnumElementDecl *, SILValue>> CaseValues,
SILFunction &F) {
// Allocate enough room for the instruction with tail-allocated
// EnumElementDecl and operand arrays. There are `CaseBBs.size()` decls
// and `CaseBBs.size() + (DefaultBB ? 1 : 0)` values.
unsigned numCases = CaseValues.size();
void *buf = F.getModule().allocateInst(
sizeof(SELECT_ENUM_INST) + sizeof(EnumElementDecl*) * numCases
+ TailAllocatedOperandList<1>::getExtraSize(numCases + (bool)DefaultValue),
alignof(SELECT_ENUM_INST));
return ::new (buf) SELECT_ENUM_INST(Loc,Operand,Ty,DefaultValue,CaseValues);
}
SelectEnumInst *SelectEnumInst::create(
SILDebugLocation *Loc, SILValue Operand, SILType Type,
SILValue DefaultValue,
ArrayRef<std::pair<EnumElementDecl *, SILValue>> CaseValues,
SILFunction &F) {
return createSelectEnum<SelectEnumInst>(Loc, Operand, Type, DefaultValue,
CaseValues, F);
}
SelectEnumAddrInst *SelectEnumAddrInst::create(
SILDebugLocation *Loc, SILValue Operand, SILType Type,
SILValue DefaultValue,
ArrayRef<std::pair<EnumElementDecl *, SILValue>> CaseValues,
SILFunction &F) {
return createSelectEnum<SelectEnumAddrInst>(Loc, Operand, Type, DefaultValue,
CaseValues, F);
}
SwitchEnumInstBase::SwitchEnumInstBase(
ValueKind Kind, SILDebugLocation *Loc, SILValue Operand,
SILBasicBlock *DefaultBB,
ArrayRef<std::pair<EnumElementDecl *, SILBasicBlock *>> CaseBBs)
: TermInst(Kind, Loc), Operands(this, Operand), NumCases(CaseBBs.size()),
HasDefault(bool(DefaultBB)) {
// Initialize the case and successor arrays.
auto *cases = getCaseBuf();
auto *succs = getSuccessorBuf();
for (unsigned i = 0, size = CaseBBs.size(); i < size; ++i) {
cases[i] = CaseBBs[i].first;
::new (succs + i) SILSuccessor(this, CaseBBs[i].second);
}
if (HasDefault)
::new (succs + NumCases) SILSuccessor(this, DefaultBB);
}
namespace {
template <class Inst> EnumElementDecl *
getUniqueCaseForDefaultValue(Inst *inst, SILValue enumValue) {
assert(inst->hasDefault() && "doesn't have a default");
SILType enumType = enumValue.getType();
if (!enumType.hasFixedLayout(inst->getModule()))
return nullptr;
EnumDecl *decl = enumType.getEnumOrBoundGenericEnum();
assert(decl && "switch_enum operand is not an enum");
llvm::SmallPtrSet<EnumElementDecl *, 4> unswitchedElts;