CostTable.h revision 326938 
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_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/CodeGen/MachineValueType.h"
21
22namespace llvm {
23
24/// Cost Table Entry
25struct 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 ==
32inline 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
45struct 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 ==
54inline const TypeConversionCostTblEntry *
55ConvertCostTableLookup(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