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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_IR_DATALAYOUT_H
#define RCC_IR_DATALAYOUT_H
#include "rcc/IR/Constants.h"
#include "rcc/Support/Error.h"
#include <cstddef>
#include <cstdint>
#include <string>
#include <string_view>
#include <vector>
namespace rcc {
class DataLayout final {
public:
[[nodiscard]] static Expected<DataLayout> parse(std::string_view LayoutString);
[[nodiscard]] Expected<std::uint64_t> getTypeAllocSize(const GenericConstantType &Type) const;
[[nodiscard]] Expected<std::uint64_t> getABITypeAlign(const GenericConstantType &Type) const;
[[nodiscard]] Expected<std::uint64_t> getPrefTypeAlign(const GenericConstantType &Type) const;
[[nodiscard]] Expected<std::uint32_t> getPointerSizeInBits(std::uint32_t AddressSpace = 0) const;
private:
struct AlignmentSpec final {
std::uint64_t ABI = 1;
std::uint64_t Preferred = 1;
};
struct PrimitiveSpec final {
char Kind = '\0';
std::uint32_t BitWidth = 0;
AlignmentSpec Alignment;
};
struct PointerSpec final {
std::uint32_t AddressSpace = 0;
std::uint32_t SizeInBits = 0;
AlignmentSpec Alignment;
std::string AddressSpaceName;
};
struct TypeLayout final {
std::uint64_t StoreSize = 0;
std::uint64_t AllocationSize = 0;
std::uint64_t ABIAlignment = 1;
std::uint64_t PreferredAlignment = 1;
};
[[nodiscard]] static Expected<std::uint64_t> parseUnsignedField(std::string_view Text,
std::string_view Description);
[[nodiscard]] static Expected<std::uint64_t> alignmentBytes(std::string_view Text, bool AllowZero,
std::string_view Description);
[[nodiscard]] static std::vector<std::string_view> split(std::string_view Text, char Separator);
void setPrimitiveSpec(PrimitiveSpec Entry);
void setPointerSpec(PointerSpec Entry);
[[nodiscard]] AlignmentSpec naturalAlignment(std::uint64_t StoreSize) const noexcept;
[[nodiscard]] AlignmentSpec scalarAlignment(char Kind, std::uint32_t BitWidth,
std::uint64_t StoreSize) const noexcept;
[[nodiscard]] AlignmentSpec integerAlignment(std::uint32_t BitWidth,
std::uint64_t StoreSize) const noexcept;
[[nodiscard]] AlignmentSpec floatingAlignment(std::uint32_t BitWidth,
std::uint64_t StoreSize) const noexcept;
[[nodiscard]] AlignmentSpec vectorAlignment(std::uint32_t BitWidth,
std::uint64_t StoreSize) const noexcept;
[[nodiscard]] Expected<PointerSpec> getPointerSpec(std::uint32_t AddressSpace) const;
[[nodiscard]] Expected<TypeLayout> getTypeLayout(const GenericConstantType &Type,
std::vector<std::string> &NamedTypeStack,
std::size_t Depth) const;
bool Explicit = false;
std::vector<PrimitiveSpec> PrimitiveSpecs;
std::vector<PointerSpec> PointerSpecs;
AlignmentSpec AggregateAlignment{1, 8};
};
} // namespace rcc
#endif // RCC_IR_DATALAYOUT_H
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