1 //===-- CostTable.h - Instruction Cost Table handling -----------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief Cost tables and simple lookup functions
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_TARGET_COSTTABLE_H_
16 #define LLVM_TARGET_COSTTABLE_H_
17 
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/CodeGen/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 ==
CostTableLookup(ArrayRef<CostTblEntry> Tbl,int ISD,MVT Ty)31 inline const CostTblEntry *CostTableLookup(ArrayRef<CostTblEntry> Tbl,
32                                            int ISD, MVT Ty) {
33   auto I = std::find_if(Tbl.begin(), Tbl.end(),
34                         [=](const CostTblEntry &Entry) {
35                           return ISD == Entry.ISD && Ty == Entry.Type; });
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 *
ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntry> Tbl,int ISD,MVT Dst,MVT Src)54 ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntry> Tbl,
55                        int ISD, MVT Dst, MVT Src) {
56   auto I = std::find_if(Tbl.begin(), Tbl.end(),
57                         [=](const TypeConversionCostTblEntry &Entry) {
58                           return ISD == Entry.ISD && Src == Entry.Src &&
59                                  Dst == Entry.Dst;
60                         });
61   if (I != Tbl.end())
62     return I;
63 
64   // Could not find an entry.
65   return nullptr;
66 }
67 
68 } // namespace llvm
69 
70 
71 #endif /* LLVM_TARGET_COSTTABLE_H_ */
72