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 /// Cost tables and simple lookup functions
12 ///
13 //===----------------------------------------------------------------------===//
14
15 #ifndef LLVM_CODEGEN_COSTTABLE_H_
16 #define LLVM_CODEGEN_COSTTABLE_H_
17
18 #include "llvm/ADT/ArrayRef.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/Support/MachineValueType.h"
21
22 namespace llvm {
23
24 /// Cost Table Entry
25 struct CostTblEntry {
26 int ISD;
27 MVT::SimpleValueType Type;
28 unsigned Cost;
29 };
30
31 /// Find in cost table, TypeTy must be comparable to CompareTy by ==
CostTableLookup(ArrayRef<CostTblEntry> Tbl,int ISD,MVT Ty)32 inline const CostTblEntry *CostTableLookup(ArrayRef<CostTblEntry> Tbl,
33 int ISD, MVT Ty) {
34 auto I = find_if(Tbl, [=](const CostTblEntry &Entry) {
35 return ISD == Entry.ISD && Ty == Entry.Type;
36 });
37 if (I != Tbl.end())
38 return I;
39
40 // Could not find an entry.
41 return nullptr;
42 }
43
44 /// Type Conversion Cost Table
45 struct TypeConversionCostTblEntry {
46 int ISD;
47 MVT::SimpleValueType Dst;
48 MVT::SimpleValueType Src;
49 unsigned Cost;
50 };
51
52 /// Find in type conversion cost table, TypeTy must be comparable to CompareTy
53 /// by ==
54 inline const TypeConversionCostTblEntry *
ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntry> Tbl,int ISD,MVT Dst,MVT Src)55 ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntry> Tbl,
56 int ISD, MVT Dst, MVT Src) {
57 auto I = find_if(Tbl, [=](const TypeConversionCostTblEntry &Entry) {
58 return ISD == Entry.ISD && Src == Entry.Src && Dst == Entry.Dst;
59 });
60 if (I != Tbl.end())
61 return I;
62
63 // Could not find an entry.
64 return nullptr;
65 }
66
67 } // namespace llvm
68
69 #endif /* LLVM_CODEGEN_COSTTABLE_H_ */
70