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/*========================== begin_copyright_notice ============================
Copyright (C) 2020-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#ifndef IGCLLVM_SUPPORT_ALIGNMENT_H
#define IGCLLVM_SUPPORT_ALIGNMENT_H
#include <cstdint>
#include <type_traits>
#include "llvm/IR/Value.h"
#include "llvm/Config/llvm-config.h"
#if LLVM_VERSION_MAJOR >= 10
#include "llvm/Support/Alignment.h"
using namespace llvm;
#endif
#if LLVM_VERSION_MAJOR >= 14
typedef uint64_t alignment_t;
#else
typedef unsigned alignment_t;
#endif
namespace IGCLLVM {
#if LLVM_VERSION_MAJOR < 10
inline uint64_t getAlignmentValue(uint64_t Val) { return Val; }
inline unsigned getAlign(uint64_t Val) { return (unsigned)Val; }
#else
inline uint64_t getAlignmentValue(llvm::Align A) { return A.value(); }
inline uint64_t getAlignmentValue(uint64_t Val) { return Val; }
inline llvm::Align getAlign(uint64_t Val) { return llvm::Align{Val}; }
#endif
// The transition from unsigned to llvm::Align was not completed with LLVM
// 9->10 switch and some of functions (see IRBuilder methods) were still
// using unsigned type. With LLVM 11 transition this was changed and now
// IRBuilder methods are using llvm::Align. It creates a problem with
// IGCLLVM::getAlign function, because it stopped work properly.
// IGCLLVM::getAlignmentValueIfNeeded is a helper to getAlign function that
// resolves such situations.
#if LLVM_VERSION_MAJOR < 10
inline uint64_t getAlignmentValueIfNeeded(uint64_t A) { return A; }
#elif LLVM_VERSION_MAJOR == 10
inline uint64_t getAlignmentValueIfNeeded(llvm::Align A) {
return A.value();
}
#else
inline llvm::Align getAlignmentValueIfNeeded(llvm::Align A) { return A; }
#endif
using Align =
#if LLVM_VERSION_MAJOR < 10
unsigned;
#elif LLVM_VERSION_MAJOR == 10
llvm::MaybeAlign;
#elif LLVM_VERSION_MAJOR >= 11
llvm::Align;
#endif
inline Align getCorrectAlign(alignment_t Val)
{
#if LLVM_VERSION_MAJOR >= 11
// llvm::Align does not accept 0 alignment.
return llvm::assumeAligned(Val);
#else
return Align{ Val };
#endif
}
// It is meant for copying alignement.
// getAlign returns different type for different LLVM versions but
// it can be overcome by using auto or direct usage in another LLVM
// interface.
template <typename TValue,
std::enable_if_t<std::is_base_of_v<llvm::Value, TValue>, int> = 0>
Align getAlign(const TValue &Val)
{
#if LLVM_VERSION_MAJOR <= 9
return Val.getAlignment();
#elif LLVM_VERSION_MAJOR <= 10
return llvm::MaybeAlign(Val.getAlignment());
#else
return llvm::Align(Val.getAlignment());
#endif
}
template <typename TValue,
std::enable_if_t<std::is_base_of_v<llvm::Value, TValue>, int> = 0>
Align getDestAlign(const TValue &Val) {
#if LLVM_VERSION_MAJOR <= 9
return Val.getDestAlignment();
#elif LLVM_VERSION_MAJOR <= 10
return Val.getDestAlign();
#else
return Val.getDestAlign().valueOrOne();
#endif
}
template <typename TValue,
std::enable_if_t<std::is_base_of_v<llvm::Value, TValue>, int> = 0>
Align getSourceAlign(const TValue &Val) {
#if LLVM_VERSION_MAJOR <= 9
return Val.getSourceAlignment();
#elif LLVM_VERSION_MAJOR <= 10
return Val.getSourceAlign();
#else
return Val.getSourceAlign().valueOrOne();
#endif
}
} // namespace IGCLLVM
#endif
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