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9c134263de
We had two copies of this code that had drifted apart. Bring them back together so there is just one place where we compute the type of a reabstraction thunk.
97 lines
4.0 KiB
C++
97 lines
4.0 KiB
C++
//===--- Thunk.h - Automatic differentiation thunks -----------*- C++ -*---===//
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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) 2019 - 2020 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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// Automatic differentiation thunk generation utilities.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SILOPTIMIZER_UTILS_DIFFERENTIATION_THUNK_H
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#define SWIFT_SILOPTIMIZER_UTILS_DIFFERENTIATION_THUNK_H
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#include "swift/AST/AutoDiff.h"
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#include "swift/Basic/LLVM.h"
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#include "swift/SIL/SILBuilder.h"
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namespace swift {
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class SILOptFunctionBuilder;
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class SILModule;
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class SILLocation;
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class SILValue;
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class OpenedArchetypeType;
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class GenericEnvironment;
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class SubstitutionMap;
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class ArchetypeType;
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//===----------------------------------------------------------------------===//
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// Helpers
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//===----------------------------------------------------------------------===//
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namespace autodiff {
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class ADContext;
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//===----------------------------------------------------------------------===//
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// Thunk helpers
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//===----------------------------------------------------------------------===//
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// These helpers are copied/adapted from SILGen. They should be refactored and
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// moved to a shared location.
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//===----------------------------------------------------------------------===//
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/// Get or create a reabstraction thunk from `fromType` to `toType`, to be
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/// called in `caller`.
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SILFunction *getOrCreateReabstractionThunk(SILOptFunctionBuilder &fb,
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SILModule &module, SILLocation loc,
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SILFunction *caller,
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CanSILFunctionType fromType,
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CanSILFunctionType toType);
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/// Reabstracts the given function-typed value `fn` to the target type `toType`.
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/// Remaps substitutions using `remapSubstitutions`.
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SILValue reabstractFunction(
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SILBuilder &builder, SILOptFunctionBuilder &fb, SILLocation loc,
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SILValue fn, CanSILFunctionType toType,
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std::function<SubstitutionMap(SubstitutionMap)> remapSubstitutions);
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/// Get or create a derivative function parameter index subset thunk from
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/// `actualIndices` to `desiredIndices` for the given associated function
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/// value and original function operand. Returns a pair of the parameter
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/// index subset thunk and its interface substitution map (used to partially
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/// apply the thunk).
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/// Calls `getOrCreateSubsetParametersThunkForLinearMap` to thunk the linear
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/// map returned by the derivative function.
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std::pair<SILFunction *, SubstitutionMap>
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getOrCreateSubsetParametersThunkForDerivativeFunction(
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SILOptFunctionBuilder &fb, SILValue origFnOperand, SILValue derivativeFn,
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AutoDiffDerivativeFunctionKind kind, const AutoDiffConfig &desiredConfig,
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const AutoDiffConfig &actualConfig, ADContext &adContext);
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/// Get or create a derivative function parameter index subset thunk from
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/// `actualIndices` to `desiredIndices` for the given associated function
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/// value and original function operand. Returns a pair of the parameter
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/// index subset thunk and its interface substitution map (used to partially
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/// apply the thunk).
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std::pair<SILFunction *, SubstitutionMap>
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getOrCreateSubsetParametersThunkForLinearMap(
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SILOptFunctionBuilder &fb, SILFunction *assocFn,
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CanSILFunctionType origFnType, CanSILFunctionType linearMapType,
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CanSILFunctionType targetType, AutoDiffDerivativeFunctionKind kind,
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const AutoDiffConfig &desiredConfig, const AutoDiffConfig &actualConfig,
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ADContext &adContext);
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} // end namespace autodiff
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} // end namespace swift
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#endif // SWIFT_SILOPTIMIZER_MANDATORY_DIFFERENTIATION_THUNK_H
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