| //===--- SILGenBuiltin.cpp - SIL generation for builtin call sites -------===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See https://swift.org/LICENSE.txt for license information |
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SpecializedEmitter.h" |
| |
| #include "Cleanup.h" |
| #include "Initialization.h" |
| #include "LValue.h" |
| #include "RValue.h" |
| #include "Scope.h" |
| #include "SILGenFunction.h" |
| #include "swift/AST/ASTContext.h" |
| #include "swift/AST/Builtins.h" |
| #include "swift/AST/DiagnosticsSIL.h" |
| #include "swift/AST/GenericEnvironment.h" |
| #include "swift/AST/Module.h" |
| #include "swift/AST/ReferenceCounting.h" |
| #include "swift/SIL/SILArgument.h" |
| #include "swift/SIL/SILUndef.h" |
| |
| using namespace swift; |
| using namespace Lowering; |
| |
| static bool isTrivialShuffle(ArgumentShuffleExpr *shuffle) { |
| // Each element must be mapped to the corresponding element of the input. |
| auto mapping = shuffle->getElementMapping(); |
| for (auto index : indices(mapping)) { |
| if (mapping[index] < 0 || unsigned(mapping[index]) != index) |
| return false; |
| } |
| return true; |
| } |
| |
| /// Break down an expression that's the formal argument expression to |
| /// a builtin function, returning its individualized arguments. |
| /// |
| /// Because these are builtin operations, we can make some structural |
| /// assumptions about the expression used to call them. |
| static ArrayRef<Expr*> decomposeArguments(SILGenFunction &SGF, |
| Expr *arg, |
| unsigned expectedCount) { |
| assert(expectedCount >= 2); |
| assert(arg->getType()->is<TupleType>()); |
| assert(arg->getType()->castTo<TupleType>()->getNumElements() |
| == expectedCount); |
| |
| // The use of owned parameters can trip up CSApply enough to introduce |
| // a trivial tuple shuffle here. |
| arg = arg->getSemanticsProvidingExpr(); |
| if (auto shuffle = dyn_cast<ArgumentShuffleExpr>(arg)) { |
| if (isTrivialShuffle(shuffle)) |
| arg = shuffle->getSubExpr(); |
| } |
| |
| auto tuple = dyn_cast<TupleExpr>(arg); |
| if (tuple && tuple->getElements().size() == expectedCount) { |
| return tuple->getElements(); |
| } |
| |
| SGF.SGM.diagnose(arg, diag::invalid_sil_builtin, |
| "argument to builtin should be a literal tuple"); |
| |
| auto tupleTy = arg->getType()->castTo<TupleType>(); |
| |
| // This is well-typed but may cause code to be emitted redundantly. |
| auto &ctxt = SGF.getASTContext(); |
| SmallVector<Expr*, 4> args; |
| for (auto index : indices(tupleTy->getElementTypes())) { |
| Expr *projection = new (ctxt) TupleElementExpr(arg, SourceLoc(), |
| index, SourceLoc(), |
| tupleTy->getElementType(index)); |
| args.push_back(projection); |
| } |
| return ctxt.AllocateCopy(args); |
| } |
| |
| static ManagedValue emitBuiltinRetain(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| // The value was produced at +1; we can produce an unbalanced retain simply by |
| // disabling the cleanup. But this would violate ownership semantics. Instead, |
| // we must allow for the cleanup and emit a new unmanaged retain value. |
| SGF.B.createUnmanagedRetainValue(loc, args[0].getValue(), |
| SGF.B.getDefaultAtomicity()); |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| static ManagedValue emitBuiltinRelease(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| // The value was produced at +1, so to produce an unbalanced |
| // release we need to leave the cleanup intact and then do a *second* |
| // release. |
| SGF.B.createUnmanagedReleaseValue(loc, args[0].getValue(), |
| SGF.B.getDefaultAtomicity()); |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| static ManagedValue emitBuiltinAutorelease(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| SGF.B.createUnmanagedAutoreleaseValue(loc, args[0].getValue(), |
| SGF.B.getDefaultAtomicity()); |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Specialized emitter for Builtin.load and Builtin.take. |
| static ManagedValue emitBuiltinLoadOrTake(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C, |
| IsTake_t isTake, |
| bool isStrict, |
| bool isInvariant) { |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "load should have single substitution"); |
| assert(args.size() == 1 && "load should have a single argument"); |
| |
| // The substitution gives the type of the load. This is always a |
| // first-class type; there is no way to e.g. produce a @weak load |
| // with this builtin. |
| auto &rvalueTL = SGF.getTypeLowering(substitutions.getReplacementTypes()[0]); |
| SILType loadedType = rvalueTL.getLoweredType(); |
| |
| // Convert the pointer argument to a SIL address. |
| SILValue addr = SGF.B.createPointerToAddress(loc, args[0].getUnmanagedValue(), |
| loadedType.getAddressType(), |
| isStrict, isInvariant); |
| // Perform the load. |
| return SGF.emitLoad(loc, addr, rvalueTL, C, isTake); |
| } |
| |
| static ManagedValue emitBuiltinLoad(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| return emitBuiltinLoadOrTake(SGF, loc, substitutions, args, |
| C, IsNotTake, |
| /*isStrict*/ true, /*isInvariant*/ false); |
| } |
| |
| static ManagedValue emitBuiltinLoadRaw(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| return emitBuiltinLoadOrTake(SGF, loc, substitutions, args, |
| C, IsNotTake, |
| /*isStrict*/ false, /*isInvariant*/ false); |
| } |
| |
| static ManagedValue emitBuiltinLoadInvariant(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| return emitBuiltinLoadOrTake(SGF, loc, substitutions, args, |
| C, IsNotTake, |
| /*isStrict*/ false, /*isInvariant*/ true); |
| } |
| |
| static ManagedValue emitBuiltinTake(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| return emitBuiltinLoadOrTake(SGF, loc, substitutions, args, |
| C, IsTake, |
| /*isStrict*/ true, /*isInvariant*/ false); |
| } |
| |
| /// Specialized emitter for Builtin.destroy. |
| static ManagedValue emitBuiltinDestroy(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 2 && "destroy should have two arguments"); |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "destroy should have a single substitution"); |
| // The substitution determines the type of the thing we're destroying. |
| auto &ti = SGF.getTypeLowering(substitutions.getReplacementTypes()[0]); |
| |
| // Destroy is a no-op for trivial types. |
| if (ti.isTrivial()) |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| |
| SILType destroyType = ti.getLoweredType(); |
| |
| // Convert the pointer argument to a SIL address. |
| SILValue addr = |
| SGF.B.createPointerToAddress(loc, args[1].getUnmanagedValue(), |
| destroyType.getAddressType(), |
| /*isStrict*/ true, |
| /*isInvariant*/ false); |
| |
| // Destroy the value indirectly. Canonicalization will promote to loads |
| // and releases if appropriate. |
| SGF.B.createDestroyAddr(loc, addr); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| static ManagedValue emitBuiltinAssign(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() >= 2 && "assign should have two arguments"); |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "assign should have a single substitution"); |
| |
| // The substitution determines the type of the thing we're destroying. |
| CanType assignFormalType = |
| substitutions.getReplacementTypes()[0]->getCanonicalType(); |
| SILType assignType = SGF.getLoweredType(assignFormalType); |
| |
| // Convert the destination pointer argument to a SIL address. |
| SILValue addr = SGF.B.createPointerToAddress(loc, |
| args.back().getUnmanagedValue(), |
| assignType.getAddressType(), |
| /*isStrict*/ true, |
| /*isInvariant*/ false); |
| |
| // Build the value to be assigned, reconstructing tuples if needed. |
| auto src = RValue(SGF, args.slice(0, args.size() - 1), assignFormalType); |
| |
| std::move(src).ensurePlusOne(SGF, loc).assignInto(SGF, loc, addr); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Emit Builtin.initialize by evaluating the operand directly into |
| /// the address. |
| static ManagedValue emitBuiltinInit(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| Expr *tuple, |
| SGFContext C) { |
| auto args = decomposeArguments(SGF, tuple, 2); |
| |
| CanType formalType = |
| substitutions.getReplacementTypes()[0]->getCanonicalType(); |
| auto &formalTL = SGF.getTypeLowering(formalType); |
| |
| SILValue addr = SGF.emitRValueAsSingleValue(args[1]).getUnmanagedValue(); |
| addr = SGF.B.createPointerToAddress( |
| loc, addr, formalTL.getLoweredType().getAddressType(), |
| /*isStrict*/ true, |
| /*isInvariant*/ false); |
| |
| TemporaryInitialization init(addr, CleanupHandle::invalid()); |
| SGF.emitExprInto(args[0], &init); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Specialized emitter for Builtin.fixLifetime. |
| static ManagedValue emitBuiltinFixLifetime(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| for (auto arg : args) { |
| SGF.B.createFixLifetime(loc, arg.getValue()); |
| } |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| static ManagedValue emitCastToReferenceType(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C, |
| SILType objPointerType) { |
| assert(args.size() == 1 && "cast should have a single argument"); |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "cast should have a type substitution"); |
| |
| // Bail if the source type is not a class reference of some kind. |
| Type argTy = substitutions.getReplacementTypes()[0]; |
| if (!argTy->mayHaveSuperclass() && !argTy->isClassExistentialType()) { |
| SGF.SGM.diagnose(loc, diag::invalid_sil_builtin, |
| "castToNativeObject source must be a class"); |
| return SGF.emitUndef(objPointerType); |
| } |
| |
| // Grab the argument. |
| ManagedValue arg = args[0]; |
| |
| // If the argument is existential, open it. |
| if (argTy->isClassExistentialType()) { |
| auto openedTy = OpenedArchetypeType::get(argTy); |
| SILType loweredOpenedTy = SGF.getLoweredLoadableType(openedTy); |
| arg = SGF.B.createOpenExistentialRef(loc, arg, loweredOpenedTy); |
| } |
| |
| // Return the cast result. |
| return SGF.B.createUncheckedRefCast(loc, arg, objPointerType); |
| } |
| |
| /// Specialized emitter for Builtin.unsafeCastToNativeObject. |
| static ManagedValue emitBuiltinUnsafeCastToNativeObject(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| return emitCastToReferenceType(SGF, loc, substitutions, args, C, |
| SILType::getNativeObjectType(SGF.F.getASTContext())); |
| } |
| |
| /// Specialized emitter for Builtin.castToNativeObject. |
| static ManagedValue emitBuiltinCastToNativeObject(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| auto ty = args[0].getType().getASTType(); |
| (void)ty; |
| assert(ty->getReferenceCounting() == ReferenceCounting::Native && |
| "Can only cast types that use native reference counting to native " |
| "object"); |
| return emitBuiltinUnsafeCastToNativeObject(SGF, loc, substitutions, |
| args, C); |
| } |
| |
| |
| static ManagedValue emitCastFromReferenceType(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "cast should have a single argument"); |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "cast should have a single substitution"); |
| |
| // The substitution determines the destination type. |
| SILType destType = |
| SGF.getLoweredType(substitutions.getReplacementTypes()[0]); |
| |
| // Bail if the source type is not a class reference of some kind. |
| if (!substitutions.getReplacementTypes()[0]->isBridgeableObjectType() |
| || !destType.isObject()) { |
| SGF.SGM.diagnose(loc, diag::invalid_sil_builtin, |
| "castFromNativeObject dest must be an object type"); |
| // Recover by propagating an undef result. |
| return SGF.emitUndef(destType); |
| } |
| |
| return SGF.B.createUncheckedRefCast(loc, args[0], destType); |
| } |
| |
| /// Specialized emitter for Builtin.castFromNativeObject. |
| static ManagedValue emitBuiltinCastFromNativeObject(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| return emitCastFromReferenceType(SGF, loc, substitutions, args, C); |
| } |
| |
| /// Specialized emitter for Builtin.bridgeToRawPointer. |
| static ManagedValue emitBuiltinBridgeToRawPointer(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "bridge should have a single argument"); |
| |
| // Take the reference type argument and cast it to RawPointer. |
| // RawPointers do not have ownership semantics, so the cleanup on the |
| // argument remains. |
| SILType rawPointerType = SILType::getRawPointerType(SGF.F.getASTContext()); |
| SILValue result = SGF.B.createRefToRawPointer(loc, args[0].getValue(), |
| rawPointerType); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| /// Specialized emitter for Builtin.bridgeFromRawPointer. |
| static ManagedValue emitBuiltinBridgeFromRawPointer(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "bridge should have a single substitution"); |
| assert(args.size() == 1 && "bridge should have a single argument"); |
| |
| // The substitution determines the destination type. |
| // FIXME: Archetype destination type? |
| auto &destLowering = |
| SGF.getTypeLowering(substitutions.getReplacementTypes()[0]); |
| assert(destLowering.isLoadable()); |
| SILType destType = destLowering.getLoweredType(); |
| |
| // Take the raw pointer argument and cast it to the destination type. |
| SILValue result = SGF.B.createRawPointerToRef(loc, args[0].getUnmanagedValue(), |
| destType); |
| // The result has ownership semantics, so retain it with a cleanup. |
| return SGF.emitManagedRetain(loc, result, destLowering); |
| } |
| |
| /// Specialized emitter for Builtin.addressof. |
| static ManagedValue emitBuiltinAddressOf(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| Expr *argument, |
| SGFContext C) { |
| auto rawPointerTy = SILType::getRawPointerType(SGF.getASTContext()); |
| // If the argument is inout, try forming its lvalue. This builtin only works |
| // if it's trivially physically projectable. |
| auto inout = cast<InOutExpr>(argument->getSemanticsProvidingExpr()); |
| auto lv = SGF.emitLValue(inout->getSubExpr(), SGFAccessKind::ReadWrite); |
| if (!lv.isPhysical() || !lv.isLoadingPure()) { |
| SGF.SGM.diagnose(argument->getLoc(), diag::non_physical_addressof); |
| return SGF.emitUndef(rawPointerTy); |
| } |
| |
| auto addr = SGF.emitAddressOfLValue(argument, std::move(lv)) |
| .getLValueAddress(); |
| |
| // Take the address argument and cast it to RawPointer. |
| SILType rawPointerType = SILType::getRawPointerType(SGF.F.getASTContext()); |
| SILValue result = SGF.B.createAddressToPointer(loc, addr, |
| rawPointerType); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| /// Specialized emitter for Builtin.addressOfBorrow. |
| static ManagedValue emitBuiltinAddressOfBorrow(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| Expr *argument, |
| SGFContext C) { |
| auto rawPointerTy = SILType::getRawPointerType(SGF.getASTContext()); |
| SILValue addr; |
| // Try to borrow the argument at +0. We only support if it's |
| // naturally emitted borrowed in memory. |
| auto borrow = SGF.emitRValue(argument, SGFContext::AllowGuaranteedPlusZero) |
| .getAsSingleValue(SGF, argument); |
| if (!borrow.isPlusZero() || !borrow.getType().isAddress()) { |
| SGF.SGM.diagnose(argument->getLoc(), diag::non_borrowed_indirect_addressof); |
| return SGF.emitUndef(rawPointerTy); |
| } |
| |
| addr = borrow.getValue(); |
| |
| // Take the address argument and cast it to RawPointer. |
| SILType rawPointerType = SILType::getRawPointerType(SGF.F.getASTContext()); |
| SILValue result = SGF.B.createAddressToPointer(loc, addr, |
| rawPointerType); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| /// Specialized emitter for Builtin.gepRaw. |
| static ManagedValue emitBuiltinGepRaw(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 2 && "gepRaw should be given two arguments"); |
| |
| SILValue offsetPtr = SGF.B.createIndexRawPointer(loc, |
| args[0].getUnmanagedValue(), |
| args[1].getUnmanagedValue()); |
| return ManagedValue::forUnmanaged(offsetPtr); |
| } |
| |
| /// Specialized emitter for Builtin.gep. |
| static ManagedValue emitBuiltinGep(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "gep should have two substitutions"); |
| assert(args.size() == 3 && "gep should be given three arguments"); |
| |
| SILType ElemTy = SGF.getLoweredType(substitutions.getReplacementTypes()[0]); |
| SILType RawPtrType = args[0].getUnmanagedValue()->getType(); |
| SILValue addr = SGF.B.createPointerToAddress(loc, |
| args[0].getUnmanagedValue(), |
| ElemTy.getAddressType(), |
| /*strict*/ true, |
| /*invariant*/ false); |
| addr = SGF.B.createIndexAddr(loc, addr, args[1].getUnmanagedValue()); |
| addr = SGF.B.createAddressToPointer(loc, addr, RawPtrType); |
| |
| return ManagedValue::forUnmanaged(addr); |
| } |
| |
| /// Specialized emitter for Builtin.getTailAddr. |
| static ManagedValue emitBuiltinGetTailAddr(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(substitutions.getReplacementTypes().size() == 2 && |
| "getTailAddr should have two substitutions"); |
| assert(args.size() == 4 && "gep should be given four arguments"); |
| |
| SILType ElemTy = SGF.getLoweredType(substitutions.getReplacementTypes()[0]); |
| SILType TailTy = SGF.getLoweredType(substitutions.getReplacementTypes()[1]); |
| SILType RawPtrType = args[0].getUnmanagedValue()->getType(); |
| SILValue addr = SGF.B.createPointerToAddress(loc, |
| args[0].getUnmanagedValue(), |
| ElemTy.getAddressType(), |
| /*strict*/ true, |
| /*invariant*/ false); |
| addr = SGF.B.createTailAddr(loc, addr, args[1].getUnmanagedValue(), |
| TailTy.getAddressType()); |
| addr = SGF.B.createAddressToPointer(loc, addr, RawPtrType); |
| |
| return ManagedValue::forUnmanaged(addr); |
| } |
| |
| /// Specialized emitter for Builtin.beginUnpairedModifyAccess. |
| static ManagedValue emitBuiltinBeginUnpairedModifyAccess(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "Builtin.beginUnpairedModifyAccess should have one substitution"); |
| assert(args.size() == 3 && |
| "beginUnpairedModifyAccess should be given three arguments"); |
| |
| SILType elemTy = SGF.getLoweredType(substitutions.getReplacementTypes()[0]); |
| SILValue addr = SGF.B.createPointerToAddress(loc, |
| args[0].getUnmanagedValue(), |
| elemTy.getAddressType(), |
| /*strict*/ true, |
| /*invariant*/ false); |
| |
| SILType valueBufferTy = |
| SGF.getLoweredType(SGF.getASTContext().TheUnsafeValueBufferType); |
| |
| SILValue buffer = |
| SGF.B.createPointerToAddress(loc, args[1].getUnmanagedValue(), |
| valueBufferTy.getAddressType(), |
| /*strict*/ true, |
| /*invariant*/ false); |
| SGF.B.createBeginUnpairedAccess(loc, addr, buffer, SILAccessKind::Modify, |
| SILAccessEnforcement::Dynamic, |
| /*noNestedConflict*/ false, |
| /*fromBuiltin*/ true); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Specialized emitter for Builtin.performInstantaneousReadAccess |
| static ManagedValue emitBuiltinPerformInstantaneousReadAccess( |
| SILGenFunction &SGF, SILLocation loc, SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, SGFContext C) { |
| |
| assert(substitutions.getReplacementTypes().size() == 1 && |
| "Builtin.performInstantaneousReadAccess should have one substitution"); |
| assert(args.size() == 2 && |
| "Builtin.performInstantaneousReadAccess should be given " |
| "two arguments"); |
| |
| SILType elemTy = SGF.getLoweredType(substitutions.getReplacementTypes()[0]); |
| SILValue addr = SGF.B.createPointerToAddress(loc, |
| args[0].getUnmanagedValue(), |
| elemTy.getAddressType(), |
| /*strict*/ true, |
| /*invariant*/ false); |
| |
| SILType valueBufferTy = |
| SGF.getLoweredType(SGF.getASTContext().TheUnsafeValueBufferType); |
| SILValue unusedBuffer = SGF.emitTemporaryAllocation(loc, valueBufferTy); |
| |
| // Begin an "unscoped" read access. No nested conflict is possible because |
| // the compiler should generate the actual read for the KeyPath expression |
| // immediately after the call to this builtin, which forms the address of |
| // that real access. When noNestedConflict=true, no EndUnpairedAccess should |
| // be emitted. |
| // |
| // Unpaired access is necessary because a BeginAccess/EndAccess pair with no |
| // use will be trivially optimized away. |
| SGF.B.createBeginUnpairedAccess(loc, addr, unusedBuffer, SILAccessKind::Read, |
| SILAccessEnforcement::Dynamic, |
| /*noNestedConflict*/ true, |
| /*fromBuiltin*/ true); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Specialized emitter for Builtin.endUnpairedAccessModifyAccess. |
| static ManagedValue emitBuiltinEndUnpairedAccess(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(substitutions.empty() && |
| "Builtin.endUnpairedAccess should have no substitutions"); |
| assert(args.size() == 1 && |
| "endUnpairedAccess should be given one argument"); |
| |
| SILType valueBufferTy = |
| SGF.getLoweredType(SGF.getASTContext().TheUnsafeValueBufferType); |
| |
| SILValue buffer = SGF.B.createPointerToAddress(loc, |
| args[0].getUnmanagedValue(), |
| valueBufferTy.getAddressType(), |
| /*strict*/ true, |
| /*invariant*/ false); |
| SGF.B.createEndUnpairedAccess(loc, buffer, SILAccessEnforcement::Dynamic, |
| /*aborted*/ false, |
| /*fromBuiltin*/ true); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Specialized emitter for Builtin.condfail. |
| static ManagedValue emitBuiltinCondFail(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "condfail should be given one argument"); |
| |
| SGF.B.createCondFail(loc, args[0].getUnmanagedValue()); |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| /// Specialized emitter for Builtin.castReference. |
| static ManagedValue |
| emitBuiltinCastReference(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "castReference should be given one argument"); |
| assert(substitutions.getReplacementTypes().size() == 2 && |
| "castReference should have two subs"); |
| |
| auto fromTy = substitutions.getReplacementTypes()[0]; |
| auto toTy = substitutions.getReplacementTypes()[1]; |
| auto &fromTL = SGF.getTypeLowering(fromTy); |
| auto &toTL = SGF.getTypeLowering(toTy); |
| assert(!fromTL.isTrivial() && !toTL.isTrivial() && "expected ref type"); |
| |
| // TODO: Fix this API. |
| if (!fromTL.isAddress() || !toTL.isAddress()) { |
| if (auto refCast = SGF.B.tryCreateUncheckedRefCast(loc, args[0], |
| toTL.getLoweredType())) { |
| // Create a reference cast, forwarding the cleanup. |
| // The cast takes the source reference. |
| return refCast; |
| } |
| } |
| |
| // We are either casting between address-only types, or cannot promote to a |
| // cast of reference values. |
| // |
| // If the from/to types are invalid, then use a cast that will fail at |
| // runtime. We cannot catch these errors with SIL verification because they |
| // may legitimately occur during code specialization on dynamically |
| // unreachable paths. |
| // |
| // TODO: For now, we leave invalid casts in address form so that the runtime |
| // will trap. We could emit a noreturn call here instead which would provide |
| // more information to the optimizer. |
| SILValue srcVal = args[0].ensurePlusOne(SGF, loc).forward(SGF); |
| SILValue fromAddr; |
| if (!fromTL.isAddress()) { |
| // Move the loadable value into a "source temp". Since the source and |
| // dest are RC identical, store the reference into the source temp without |
| // a retain. The cast will load the reference from the source temp and |
| // store it into a dest temp effectively forwarding the cleanup. |
| fromAddr = SGF.emitTemporaryAllocation(loc, srcVal->getType()); |
| fromTL.emitStore(SGF.B, loc, srcVal, fromAddr, |
| StoreOwnershipQualifier::Init); |
| } else { |
| // The cast loads directly from the source address. |
| fromAddr = srcVal; |
| } |
| // Create a "dest temp" to hold the reference after casting it. |
| SILValue toAddr = SGF.emitTemporaryAllocation(loc, toTL.getLoweredType()); |
| SGF.B.createUncheckedRefCastAddr(loc, fromAddr, fromTy->getCanonicalType(), |
| toAddr, toTy->getCanonicalType()); |
| // Forward it along and register a cleanup. |
| if (toTL.isAddress()) |
| return SGF.emitManagedBufferWithCleanup(toAddr); |
| |
| // Load the destination value. |
| auto result = toTL.emitLoad(SGF.B, loc, toAddr, LoadOwnershipQualifier::Take); |
| return SGF.emitManagedRValueWithCleanup(result); |
| } |
| |
| /// Specialized emitter for Builtin.reinterpretCast. |
| static ManagedValue emitBuiltinReinterpretCast(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "reinterpretCast should be given one argument"); |
| assert(substitutions.getReplacementTypes().size() == 2 && |
| "reinterpretCast should have two subs"); |
| |
| auto &fromTL = SGF.getTypeLowering(substitutions.getReplacementTypes()[0]); |
| auto &toTL = SGF.getTypeLowering(substitutions.getReplacementTypes()[1]); |
| |
| // If casting between address types, cast the address. |
| if (fromTL.isAddress() || toTL.isAddress()) { |
| SILValue fromAddr; |
| |
| // If the from value is not an address, move it to a buffer. |
| if (!fromTL.isAddress()) { |
| fromAddr = SGF.emitTemporaryAllocation(loc, args[0].getValue()->getType()); |
| fromTL.emitStore(SGF.B, loc, args[0].getValue(), fromAddr, |
| StoreOwnershipQualifier::Init); |
| } else { |
| fromAddr = args[0].getValue(); |
| } |
| auto toAddr = SGF.B.createUncheckedAddrCast(loc, fromAddr, |
| toTL.getLoweredType().getAddressType()); |
| |
| // Load and retain the destination value if it's loadable. Leave the cleanup |
| // on the original value since we don't know anything about it's type. |
| if (!toTL.isAddress()) { |
| return SGF.emitManagedLoadCopy(loc, toAddr, toTL); |
| } |
| // Leave the cleanup on the original value. |
| if (toTL.isTrivial()) |
| return ManagedValue::forUnmanaged(toAddr); |
| |
| // Initialize the +1 result buffer without taking the incoming value. The |
| // source and destination cleanups will be independent. |
| return SGF.B.bufferForExpr( |
| loc, toTL.getLoweredType(), toTL, C, |
| [&](SILValue bufferAddr) { |
| SGF.B.createCopyAddr(loc, toAddr, bufferAddr, IsNotTake, |
| IsInitialization); |
| }); |
| } |
| // Create the appropriate bitcast based on the source and dest types. |
| ManagedValue in = args[0]; |
| SILType resultTy = toTL.getLoweredType(); |
| if (resultTy.isTrivial(SGF.F)) |
| return SGF.B.createUncheckedTrivialBitCast(loc, in, resultTy); |
| |
| // If we can perform a ref cast, just return. |
| if (auto refCast = SGF.B.tryCreateUncheckedRefCast(loc, in, resultTy)) |
| return refCast; |
| |
| // Otherwise leave the original cleanup and retain the cast value. |
| SILValue out = SGF.B.createUncheckedBitwiseCast(loc, in.getValue(), resultTy); |
| return SGF.emitManagedRetain(loc, out, toTL); |
| } |
| |
| /// Specialized emitter for Builtin.castToBridgeObject. |
| static ManagedValue emitBuiltinCastToBridgeObject(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 2 && "cast should have two arguments"); |
| assert(subs.getReplacementTypes().size() == 1 && |
| "cast should have a type substitution"); |
| |
| // Take the reference type argument and cast it to BridgeObject. |
| SILType objPointerType = SILType::getBridgeObjectType(SGF.F.getASTContext()); |
| |
| // Bail if the source type is not a class reference of some kind. |
| auto sourceType = subs.getReplacementTypes()[0]; |
| if (!sourceType->mayHaveSuperclass() && |
| !sourceType->isClassExistentialType()) { |
| SGF.SGM.diagnose(loc, diag::invalid_sil_builtin, |
| "castToBridgeObject source must be a class"); |
| return SGF.emitUndef(objPointerType); |
| } |
| |
| ManagedValue ref = args[0]; |
| SILValue bits = args[1].getUnmanagedValue(); |
| |
| // If the argument is existential, open it. |
| if (sourceType->isClassExistentialType()) { |
| auto openedTy = OpenedArchetypeType::get(sourceType); |
| SILType loweredOpenedTy = SGF.getLoweredLoadableType(openedTy); |
| ref = SGF.B.createOpenExistentialRef(loc, ref, loweredOpenedTy); |
| } |
| |
| return SGF.B.createRefToBridgeObject(loc, ref, bits); |
| } |
| |
| /// Specialized emitter for Builtin.castReferenceFromBridgeObject. |
| static ManagedValue emitBuiltinCastReferenceFromBridgeObject( |
| SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "cast should have one argument"); |
| assert(subs.getReplacementTypes().size() == 1 && |
| "cast should have a type substitution"); |
| |
| // The substitution determines the destination type. |
| auto destTy = subs.getReplacementTypes()[0]; |
| SILType destType = SGF.getLoweredType(destTy); |
| |
| // Bail if the source type is not a class reference of some kind. |
| if (!destTy->isBridgeableObjectType() || !destType.isObject()) { |
| SGF.SGM.diagnose(loc, diag::invalid_sil_builtin, |
| "castReferenceFromBridgeObject dest must be an object type"); |
| // Recover by propagating an undef result. |
| return SGF.emitUndef(destType); |
| } |
| |
| return SGF.B.createBridgeObjectToRef(loc, args[0], destType); |
| } |
| |
| static ManagedValue emitBuiltinCastBitPatternFromBridgeObject( |
| SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "cast should have one argument"); |
| assert(subs.empty() && "cast should not have subs"); |
| |
| SILType wordType = SILType::getBuiltinWordType(SGF.getASTContext()); |
| SILValue result = SGF.B.createBridgeObjectToWord(loc, args[0].getValue(), |
| wordType); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| static ManagedValue emitBuiltinClassifyBridgeObject(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "classify should have one argument"); |
| assert(subs.empty() && "classify should not have subs"); |
| |
| SILValue result = SGF.B.createClassifyBridgeObject(loc, args[0].getValue()); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| static ManagedValue emitBuiltinValueToBridgeObject(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(args.size() == 1 && "ValueToBridgeObject should have one argument"); |
| assert(subs.getReplacementTypes().size() == 1 && |
| "ValueToBridgeObject should have one sub"); |
| |
| Type argTy = subs.getReplacementTypes()[0]; |
| if (!argTy->is<BuiltinIntegerType>()) { |
| SGF.SGM.diagnose(loc, diag::invalid_sil_builtin, |
| "argument to builtin should be a builtin integer"); |
| SILType objPointerType = SILType::getBridgeObjectType(SGF.F.getASTContext()); |
| return SGF.emitUndef(objPointerType); |
| } |
| |
| SILValue result = SGF.B.createValueToBridgeObject(loc, args[0].getValue()); |
| return SGF.emitManagedRetain(loc, result); |
| } |
| |
| // This should only accept as an operand type single-refcounted-pointer types, |
| // class existentials, or single-payload enums (optional). Type checking must be |
| // deferred until IRGen so Builtin.isUnique can be called from a transparent |
| // generic wrapper (we can only type check after specialization). |
| static ManagedValue emitBuiltinIsUnique(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| |
| assert(subs.getReplacementTypes().size() == 1 && |
| "isUnique should have a single substitution"); |
| assert(args.size() == 1 && "isUnique should have a single argument"); |
| assert((args[0].getType().isAddress() && !args[0].hasCleanup()) && |
| "Builtin.isUnique takes an address."); |
| |
| return ManagedValue::forUnmanaged( |
| SGF.B.createIsUnique(loc, args[0].getValue())); |
| } |
| |
| // This force-casts the incoming address to NativeObject assuming the caller has |
| // performed all necessary checks. For example, this may directly cast a |
| // single-payload enum to a NativeObject reference. |
| static ManagedValue |
| emitBuiltinIsUnique_native(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| |
| assert(subs.getReplacementTypes().size() == 1 && |
| "isUnique_native should have one sub."); |
| assert(args.size() == 1 && "isUnique_native should have one arg."); |
| |
| auto ToType = |
| SILType::getNativeObjectType(SGF.getASTContext()).getAddressType(); |
| auto toAddr = SGF.B.createUncheckedAddrCast(loc, args[0].getValue(), ToType); |
| SILValue result = SGF.B.createIsUnique(loc, toAddr); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| static ManagedValue emitBuiltinBindMemory(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(subs.getReplacementTypes().size() == 1 && "bindMemory should have a single substitution"); |
| assert(args.size() == 3 && "bindMemory should have three argument"); |
| |
| // The substitution determines the element type for bound memory. |
| CanType boundFormalType = subs.getReplacementTypes()[0]->getCanonicalType(); |
| SILType boundType = SGF.getLoweredType(boundFormalType); |
| |
| SGF.B.createBindMemory(loc, args[0].getValue(), |
| args[1].getValue(), boundType); |
| |
| return ManagedValue::forUnmanaged(SGF.emitEmptyTuple(loc)); |
| } |
| |
| static ManagedValue emitBuiltinAllocWithTailElems(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| unsigned NumTailTypes = subs.getReplacementTypes().size() - 1; |
| assert(args.size() == NumTailTypes * 2 + 1 && |
| "wrong number of substitutions for allocWithTailElems"); |
| |
| // The substitution determines the element type for bound memory. |
| auto replacementTypes = subs.getReplacementTypes(); |
| SILType RefType = SGF.getLoweredType(replacementTypes[0]-> |
| getCanonicalType()).getObjectType(); |
| |
| SmallVector<ManagedValue, 4> Counts; |
| SmallVector<SILType, 4> ElemTypes; |
| for (unsigned Idx = 0; Idx < NumTailTypes; ++Idx) { |
| Counts.push_back(args[Idx * 2 + 1]); |
| ElemTypes.push_back(SGF.getLoweredType(replacementTypes[Idx+1]-> |
| getCanonicalType()).getObjectType()); |
| } |
| ManagedValue Metatype = args[0]; |
| if (isa<MetatypeInst>(Metatype)) { |
| auto InstanceType = |
| Metatype.getType().castTo<MetatypeType>().getInstanceType(); |
| assert(InstanceType == RefType.getASTType() && |
| "substituted type does not match operand metatype"); |
| (void) InstanceType; |
| return SGF.B.createAllocRef(loc, RefType, false, false, |
| ElemTypes, Counts); |
| } else { |
| return SGF.B.createAllocRefDynamic(loc, Metatype, RefType, false, |
| ElemTypes, Counts); |
| } |
| } |
| |
| static ManagedValue emitBuiltinProjectTailElems(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap subs, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(subs.getReplacementTypes().size() == 2 && |
| "allocWithTailElems should have two substitutions"); |
| assert(args.size() == 2 && |
| "allocWithTailElems should have three arguments"); |
| |
| // The substitution determines the element type for bound memory. |
| SILType ElemType = SGF.getLoweredType(subs.getReplacementTypes()[1]-> |
| getCanonicalType()).getObjectType(); |
| |
| SILValue result = SGF.B.createRefTailAddr(loc, args[0].getValue(), |
| ElemType.getAddressType()); |
| SILType rawPointerType = SILType::getRawPointerType(SGF.F.getASTContext()); |
| result = SGF.B.createAddressToPointer(loc, result, rawPointerType); |
| return ManagedValue::forUnmanaged(result); |
| } |
| |
| /// Specialized emitter for type traits. |
| template<TypeTraitResult (TypeBase::*Trait)(), |
| BuiltinValueKind Kind> |
| static ManagedValue emitBuiltinTypeTrait(SILGenFunction &SGF, |
| SILLocation loc, |
| SubstitutionMap substitutions, |
| ArrayRef<ManagedValue> args, |
| SGFContext C) { |
| assert(substitutions.getReplacementTypes().size() == 1 |
| && "type trait should take a single type parameter"); |
| assert(args.size() == 1 |
| && "type trait should take a single argument"); |
| |
| unsigned result; |
| |
| auto traitTy = substitutions.getReplacementTypes()[0]->getCanonicalType(); |
| |
| switch ((traitTy.getPointer()->*Trait)()) { |
| // If the type obviously has or lacks the trait, emit a constant result. |
| case TypeTraitResult::IsNot: |
| result = 0; |
| break; |
| case TypeTraitResult::Is: |
| result = 1; |
| break; |
| |
| // If not, emit the builtin call normally. Specialization may be able to |
| // eliminate it later, or we'll lower it away at IRGen time. |
| case TypeTraitResult::CanBe: { |
| auto &C = SGF.getASTContext(); |
| auto int8Ty = BuiltinIntegerType::get(8, C)->getCanonicalType(); |
| auto apply = SGF.B.createBuiltin(loc, |
| C.getIdentifier(getBuiltinName(Kind)), |
| SILType::getPrimitiveObjectType(int8Ty), |
| substitutions, args[0].getValue()); |
| |
| return ManagedValue::forUnmanaged(apply); |
| } |
| } |
| |
| // Produce the result as an integer literal constant. |
| auto val = SGF.B.createIntegerLiteral( |
| loc, SILType::getBuiltinIntegerType(8, SGF.getASTContext()), |
| (uintmax_t)result); |
| return ManagedValue::forUnmanaged(val); |
| } |
| |
| Optional<SpecializedEmitter> |
| SpecializedEmitter::forDecl(SILGenModule &SGM, SILDeclRef function) { |
| // Only consider standalone declarations in the Builtin module. |
| if (function.kind != SILDeclRef::Kind::Func) |
| return None; |
| if (!function.hasDecl()) |
| return None; |
| ValueDecl *decl = function.getDecl(); |
| if (!isa<BuiltinUnit>(decl->getDeclContext())) |
| return None; |
| |
| auto name = decl->getBaseName().getIdentifier(); |
| const BuiltinInfo &builtin = SGM.M.getBuiltinInfo(name); |
| switch (builtin.ID) { |
| // All the non-SIL, non-type-trait builtins should use the |
| // named-builtin logic, which just emits the builtin as a call to a |
| // builtin function. This includes builtins that aren't even declared |
| // in Builtins.def, i.e. all of the LLVM intrinsics. |
| // |
| // We do this in a separate pass over Builtins.def to avoid creating |
| // a bunch of identical cases. |
| #define BUILTIN(Id, Name, Attrs) \ |
| case BuiltinValueKind::Id: |
| #define BUILTIN_SIL_OPERATION(Id, Name, Overload) |
| #define BUILTIN_SANITIZER_OPERATION(Id, Name, Attrs) |
| #define BUILTIN_TYPE_CHECKER_OPERATION(Id, Name) |
| #define BUILTIN_TYPE_TRAIT_OPERATION(Id, Name) |
| #include "swift/AST/Builtins.def" |
| case BuiltinValueKind::None: |
| return SpecializedEmitter(name); |
| |
| // Do a second pass over Builtins.def, ignoring all the cases for |
| // which we emitted something above. |
| #define BUILTIN(Id, Name, Attrs) |
| |
| // Use specialized emitters for SIL builtins. |
| #define BUILTIN_SIL_OPERATION(Id, Name, Overload) \ |
| case BuiltinValueKind::Id: \ |
| return SpecializedEmitter(&emitBuiltin##Id); |
| |
| // Sanitizer builtins should never directly be called; they should only |
| // be inserted as instrumentation by SILGen. |
| #define BUILTIN_SANITIZER_OPERATION(Id, Name, Attrs) \ |
| case BuiltinValueKind::Id: \ |
| llvm_unreachable("Sanitizer builtin called directly?"); |
| |
| #define BUILTIN_TYPE_CHECKER_OPERATION(Id, Name) \ |
| case BuiltinValueKind::Id: \ |
| llvm_unreachable( \ |
| "Compile-time type checker operation should not make it to SIL!"); |
| |
| // Lower away type trait builtins when they're trivially solvable. |
| #define BUILTIN_TYPE_TRAIT_OPERATION(Id, Name) \ |
| case BuiltinValueKind::Id: \ |
| return SpecializedEmitter(&emitBuiltinTypeTrait<&TypeBase::Name, \ |
| BuiltinValueKind::Id>); |
| |
| #include "swift/AST/Builtins.def" |
| } |
| llvm_unreachable("bad builtin kind"); |
| } |
