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//===--- AdjointValue.h - Helper class for differentiation ----*- C++ -*---===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2019 - 2020 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
//
//===----------------------------------------------------------------------===//
//
// AdjointValue - a symbolic representation for adjoint values enabling
// efficient differentiation by avoiding zero materialization.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "differentiation"
#include "swift/SILOptimizer/Differentiation/AdjointValue.h"
void swift::autodiff::AdjointValue::print(llvm::raw_ostream &s) const {
switch (getKind()) {
case AdjointValueKind::Zero:
s << "Zero[" << getType() << ']';
break;
case AdjointValueKind::Aggregate:
s << "Aggregate[" << getType() << "](";
if (auto *decl = getType().getASTType()->getStructOrBoundGenericStruct()) {
interleave(
llvm::zip(decl->getStoredProperties(), getAggregateElements()),
[&s](std::tuple<VarDecl *, const AdjointValue &> elt) {
s << std::get<0>(elt)->getName() << ": ";
std::get<1>(elt).print(s);
},
[&s] { s << ", "; });
} else if (getType().is<TupleType>()) {
interleave(
getAggregateElements(),
[&s](const AdjointValue &elt) { elt.print(s); }, [&s] { s << ", "; });
} else {
llvm_unreachable("Invalid aggregate");
}
s << ')';
break;
case AdjointValueKind::Concrete:
s << "Concrete[" << getType() << "](" << base->value.concrete << ')';
break;
case AdjointValueKind::AddElement:
auto *addElementValue = getAddElementValue();
auto baseAdjoint = addElementValue->baseAdjoint;
auto eltToAdd = addElementValue->eltToAdd;
s << "AddElement[";
baseAdjoint.print(s);
s << ", Field(";
if (addElementValue->isTupleAdjoint()) {
s << addElementValue->getFieldIndex();
} else {
s << addElementValue->getFieldDecl()->getNameStr();
}
s << "), ";
eltToAdd.print(s);
s << "]";
break;
}
}
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