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//===-- gen/structs.h - D struct codegen ------------------------*- C++ -*-===//
//
// LDC – the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
//
// Functions for D struct codegen.
//
//===----------------------------------------------------------------------===//
#pragma once
#include "dmd/tokens.h"
#include <vector>
class DValue;
class StructDeclaration;
class StructInitializer;
class Type;
class VarDeclaration;
namespace llvm {
class Constant;
class Type;
class Value;
}
/**
* Sets up codegen metadata and emits global data (.init, etc.), if needed.
*
* Has no effect on already resolved struct declarations.
*
* callerLoc is the location of the expression which requires the struct type
* (only for better diagnosis)
*/
void DtoResolveStruct(StructDeclaration *sd);
void DtoResolveStruct(StructDeclaration *sd, const Loc &callerLoc);
/// Returns a boolean=true if the two structs are equal.
llvm::Value *DtoStructEquals(EXP op, DValue *lhs, DValue *rhs);
/// Return the type returned by DtoUnpaddedStruct called on a value of the
/// specified type.
/// Union types will get expanded into a struct, with a type for each member.
llvm::Type *DtoUnpaddedStructType(Type *dty);
/// Return the struct value represented by v without the padding fields.
/// Unions will be expanded, with a value for each member.
/// Note: v must be a pointer to a struct, but the return value will be a
/// first-class struct value.
llvm::Value *DtoUnpaddedStruct(Type *dty, llvm::Value *v);
/// Undo the transformation performed by DtoUnpaddedStruct, writing to lval.
void DtoPaddedStruct(Type *dty, llvm::Value *v, llvm::Value *lval);
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