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106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
//===--- ExistentialTransform.h - Existential Specializer -----------------===//
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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 contains utilities for transforming existential args to generics.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SIL_EXISTENTIALTRANSFORM_H
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#define SWIFT_SIL_EXISTENTIALTRANSFORM_H
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#include "FunctionSignatureOpts.h"
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#include "swift/SIL/SILFunction.h"
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#include "swift/SIL/SILInstruction.h"
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#include "swift/SILOptimizer/Utils/Existential.h"
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#include "swift/SILOptimizer/Utils/InstOptUtils.h"
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#include "swift/SILOptimizer/Utils/SILOptFunctionBuilder.h"
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#include "swift/SILOptimizer/Utils/SpecializationMangler.h"
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#include "llvm/ADT/SmallBitVector.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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namespace swift {
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/// A descriptor to carry information from ExistentialTransform analysis
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/// to transformation.
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struct ExistentialTransformArgumentDescriptor {
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OpenedExistentialAccess AccessType;
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bool isConsumed;
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};
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/// ExistentialTransform creates a protocol constrained generic and a thunk.
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class ExistentialTransform {
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/// Function Builder to create a new thunk.
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SILOptFunctionBuilder &FunctionBuilder;
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/// The original function to analyze and transform.
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SILFunction *F;
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/// The newly created inner function.
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SILFunction *NewF;
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/// The function signature mangler we are using.
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Mangle::FunctionSignatureSpecializationMangler &Mangler;
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/// List of arguments and their descriptors to specialize
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llvm::SmallDenseMap<int, ExistentialTransformArgumentDescriptor>
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&ExistentialArgDescriptor;
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/// Argument to Generic Type Map for NewF.
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llvm::SmallDenseMap<int, GenericTypeParamType *> ArgToGenericTypeMap;
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/// Allocate the argument descriptors.
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llvm::SmallVector<ArgumentDescriptor, 4> &ArgumentDescList;
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/// Create the Devirtualized Inner Function.
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void createExistentialSpecializedFunction();
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/// Create new generic arguments from existential arguments.
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void
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convertExistentialArgTypesToGenericArgTypes(
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SmallVectorImpl<GenericTypeParamType *> &genericParams,
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SmallVectorImpl<Requirement> &requirements);
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/// Create a name for the inner function.
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std::string createExistentialSpecializedFunctionName();
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/// Create the new devirtualized protocol function signature.
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CanSILFunctionType createExistentialSpecializedFunctionType();
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/// Create the thunk.
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void populateThunkBody();
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public:
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/// Constructor.
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ExistentialTransform(
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SILOptFunctionBuilder &FunctionBuilder, SILFunction *F,
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Mangle::FunctionSignatureSpecializationMangler &Mangler,
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llvm::SmallVector<ArgumentDescriptor, 4> &ADL,
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llvm::SmallDenseMap<int, ExistentialTransformArgumentDescriptor>
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&ExistentialArgDescriptor)
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: FunctionBuilder(FunctionBuilder), F(F), NewF(nullptr), Mangler(Mangler),
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ExistentialArgDescriptor(ExistentialArgDescriptor),
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ArgumentDescList(ADL) {}
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/// Return the optimized iner function.
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SILFunction *getExistentialSpecializedFunction() { return NewF; }
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/// External function for the optimization.
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bool run() {
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createExistentialSpecializedFunction();
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return true;
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}
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};
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} // end namespace swift
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#endif
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