1 //===-- CostTable.h - Instruction Cost Table handling -----------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// Cost tables and simple lookup functions 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CODEGEN_COSTTABLE_H_ 15 #define LLVM_CODEGEN_COSTTABLE_H_ 16 17 #include "llvm/ADT/ArrayRef.h" 18 #include "llvm/ADT/STLExtras.h" 19 #include "llvm/Support/MachineValueType.h" 20 21 namespace llvm { 22 23 /// Cost Table Entry 24 struct CostTblEntry { 25 int ISD; 26 MVT::SimpleValueType Type; 27 unsigned Cost; 28 }; 29 30 /// Find in cost table, TypeTy must be comparable to CompareTy by == 31 inline const CostTblEntry *CostTableLookup(ArrayRef<CostTblEntry> Tbl, 32 int ISD, MVT Ty) { 33 auto I = find_if(Tbl, [=](const CostTblEntry &Entry) { 34 return ISD == Entry.ISD && Ty == Entry.Type; 35 }); 36 if (I != Tbl.end()) 37 return I; 38 39 // Could not find an entry. 40 return nullptr; 41 } 42 43 /// Type Conversion Cost Table 44 struct TypeConversionCostTblEntry { 45 int ISD; 46 MVT::SimpleValueType Dst; 47 MVT::SimpleValueType Src; 48 unsigned Cost; 49 }; 50 51 /// Find in type conversion cost table, TypeTy must be comparable to CompareTy 52 /// by == 53 inline const TypeConversionCostTblEntry * 54 ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntry> Tbl, 55 int ISD, MVT Dst, MVT Src) { 56 auto I = find_if(Tbl, [=](const TypeConversionCostTblEntry &Entry) { 57 return ISD == Entry.ISD && Src == Entry.Src && Dst == Entry.Dst; 58 }); 59 if (I != Tbl.end()) 60 return I; 61 62 // Could not find an entry. 63 return nullptr; 64 } 65 66 } // namespace llvm 67 68 #endif /* LLVM_CODEGEN_COSTTABLE_H_ */ 69