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//===--- GenStruct.h - Swift IR generation for structs ----------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file provides the private interface to the struct-emission code.
//
//===----------------------------------------------------------------------===//
#ifndef SWIFT_IRGEN_GENSTRUCT_H
#define SWIFT_IRGEN_GENSTRUCT_H
#include <optional>
namespace llvm {
class Constant;
}
namespace swift {
class CanType;
class SILType;
class VarDecl;
namespace irgen {
class Address;
class Explosion;
class IRGenFunction;
class IRGenModule;
class MemberAccessStrategy;
class TypeInfo;
Address projectPhysicalStructMemberAddress(IRGenFunction &IGF,
Address base,
SILType baseType,
VarDecl *field);
void projectPhysicalStructMemberFromExplosion(IRGenFunction &IGF,
SILType baseType,
Explosion &base,
VarDecl *field,
Explosion &out);
/// Return the constant offset of the given stored property in a struct,
/// or return None if the field does not have fixed layout.
llvm::Constant *emitPhysicalStructMemberFixedOffset(IRGenModule &IGM,
SILType baseType,
VarDecl *field);
/// Return a strategy for accessing the given stored struct property.
///
/// This API is used by RemoteAST.
MemberAccessStrategy
getPhysicalStructMemberAccessStrategy(IRGenModule &IGM,
SILType baseType, VarDecl *field);
const TypeInfo *getPhysicalStructFieldTypeInfo(IRGenModule &IGM,
SILType baseType,
VarDecl *field);
/// Returns the index of the element in the llvm struct type which represents
/// \p field in \p baseType.
///
/// Returns None if \p field has an empty type and therefore has no
/// corresponding element in the llvm type.
std::optional<unsigned> getPhysicalStructFieldIndex(IRGenModule &IGM,
SILType baseType,
VarDecl *field);
} // end namespace irgen
} // end namespace swift
#endif
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