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//===-- CostTable.h - Instruction Cost Table handling -----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Cost tables and simple lookup functions
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_COSTTABLE_H_
#define LLVM_CODEGEN_COSTTABLE_H_
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/MachineValueType.h"
namespace llvm {
/// Cost Table Entry
template <typename CostType>
struct CostTblEntryT {
int ISD;
MVT::SimpleValueType Type;
CostType Cost;
};
using CostTblEntry = CostTblEntryT<unsigned>;
/// Find in cost table.
template <class CostType>
inline const CostTblEntryT<CostType> *
CostTableLookup(ArrayRef<CostTblEntryT<CostType>> Tbl, int ISD, MVT Ty) {
auto I = find_if(Tbl, [=](const CostTblEntryT<CostType> &Entry) {
return ISD == Entry.ISD && Ty == Entry.Type;
});
if (I != Tbl.end())
return I;
// Could not find an entry.
return nullptr;
}
template <size_t N, class CostType>
inline const CostTblEntryT<CostType> *
CostTableLookup(const CostTblEntryT<CostType> (&Table)[N], int ISD, MVT Ty) {
// Wrapper to fix template argument deduction failures.
return CostTableLookup<CostType>(makeArrayRef(Table), ISD, Ty);
}
/// Type Conversion Cost Table
template <typename CostType>
struct TypeConversionCostTblEntryT {
int ISD;
MVT::SimpleValueType Dst;
MVT::SimpleValueType Src;
CostType Cost;
};
using TypeConversionCostTblEntry = TypeConversionCostTblEntryT<unsigned>;
/// Find in type conversion cost table.
template <class CostType>
inline const TypeConversionCostTblEntryT<CostType> *
ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntryT<CostType>> Tbl,
int ISD, MVT Dst, MVT Src) {
auto I =
find_if(Tbl, [=](const TypeConversionCostTblEntryT<CostType> &Entry) {
return ISD == Entry.ISD && Src == Entry.Src && Dst == Entry.Dst;
});
if (I != Tbl.end())
return I;
// Could not find an entry.
return nullptr;
}
template <size_t N, class CostType>
inline const TypeConversionCostTblEntryT<CostType> *
ConvertCostTableLookup(const TypeConversionCostTblEntryT<CostType> (&Table)[N],
int ISD, MVT Dst, MVT Src) {
// Wrapper to fix template argument deduction failures.
return ConvertCostTableLookup<CostType>(makeArrayRef(Table), ISD, Dst, Src);
}
} // namespace llvm
#endif /* LLVM_CODEGEN_COSTTABLE_H_ */
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