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
21namespace llvm {
22
23/// Cost Table Entry
24struct 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 ==
31inline 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
44struct 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 ==
53inline const TypeConversionCostTblEntry *
54ConvertCostTableLookup(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