Coverage Report

Created: 2020-09-19 12:23

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Basic/TargetID.cpp
Line
Count
Source (jump to first uncovered line)
1
//===--- TargetID.cpp - Utilities for parsing target ID -------------------===//
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
#include "clang/Basic/TargetID.h"
10
#include "llvm/ADT/SmallSet.h"
11
#include "llvm/ADT/Triple.h"
12
#include "llvm/Support/TargetParser.h"
13
#include "llvm/Support/raw_ostream.h"
14
#include <map>
15
16
namespace clang {
17
18
static const llvm::SmallVector<llvm::StringRef, 4>
19
getAllPossibleAMDGPUTargetIDFeatures(const llvm::Triple &T,
20
1.84k
                                     llvm::StringRef Proc) {
21
  // Entries in returned vector should be in alphabetical order.
22
1.84k
  llvm::SmallVector<llvm::StringRef, 4> Ret;
23
1.66k
  auto ProcKind = T.isAMDGCN() ? llvm::AMDGPU::parseArchAMDGCN(Proc)
24
173
                               : llvm::AMDGPU::parseArchR600(Proc);
25
1.84k
  if (ProcKind == llvm::AMDGPU::GK_NONE)
26
67
    return Ret;
27
1.77k
  auto Features = T.isAMDGCN() ? 
llvm::AMDGPU::getArchAttrAMDGCN(ProcKind)1.66k
28
106
                               : llvm::AMDGPU::getArchAttrR600(ProcKind);
29
1.77k
  if (Features & llvm::AMDGPU::FEATURE_SRAM_ECC)
30
248
    Ret.push_back("sram-ecc");
31
1.77k
  if (Features & llvm::AMDGPU::FEATURE_XNACK)
32
1.32k
    Ret.push_back("xnack");
33
1.77k
  return Ret;
34
1.77k
}
35
36
const llvm::SmallVector<llvm::StringRef, 4>
37
getAllPossibleTargetIDFeatures(const llvm::Triple &T,
38
1.84k
                               llvm::StringRef Processor) {
39
1.84k
  llvm::SmallVector<llvm::StringRef, 4> Ret;
40
1.84k
  if (T.isAMDGPU())
41
1.84k
    return getAllPossibleAMDGPUTargetIDFeatures(T, Processor);
42
0
  return Ret;
43
0
}
44
45
/// Returns canonical processor name or empty string if \p Processor is invalid.
46
static llvm::StringRef getCanonicalProcessorName(const llvm::Triple &T,
47
1.71k
                                                 llvm::StringRef Processor) {
48
1.71k
  if (T.isAMDGPU())
49
1.71k
    return llvm::AMDGPU::getCanonicalArchName(T, Processor);
50
0
  return Processor;
51
0
}
52
53
llvm::StringRef getProcessorFromTargetID(const llvm::Triple &T,
54
788
                                         llvm::StringRef TargetID) {
55
788
  auto Split = TargetID.split(':');
56
788
  return getCanonicalProcessorName(T, Split.first);
57
788
}
58
59
// Parse a target ID with format checking only. Do not check whether processor
60
// name or features are valid for the processor.
61
//
62
// A target ID is a processor name followed by a list of target features
63
// delimited by colon. Each target feature is a string post-fixed by a plus
64
// or minus sign, e.g. gfx908:sram-ecc+:xnack-.
65
static llvm::Optional<llvm::StringRef>
66
parseTargetIDWithFormatCheckingOnly(llvm::StringRef TargetID,
67
1.10k
                                    llvm::StringMap<bool> *FeatureMap) {
68
1.10k
  llvm::StringRef Processor;
69
1.10k
70
1.10k
  if (TargetID.empty())
71
0
    return llvm::StringRef();
72
1.10k
73
1.10k
  auto Split = TargetID.split(':');
74
1.10k
  Processor = Split.first;
75
1.10k
  if (Processor.empty())
76
0
    return llvm::None;
77
1.10k
78
1.10k
  auto Features = Split.second;
79
1.10k
  if (Features.empty())
80
962
    return Processor;
81
144
82
144
  llvm::StringMap<bool> LocalFeatureMap;
83
144
  if (!FeatureMap)
84
0
    FeatureMap = &LocalFeatureMap;
85
144
86
357
  while (!Features.empty()) {
87
219
    auto Splits = Features.split(':');
88
219
    auto Sign = Splits.first.back();
89
219
    auto Feature = Splits.first.drop_back();
90
219
    if (Sign != '+' && 
Sign != '-'81
)
91
3
      return llvm::None;
92
216
    bool IsOn = Sign == '+';
93
216
    auto Loc = FeatureMap->find(Feature);
94
    // Each feature can only show up at most once in target ID.
95
216
    if (Loc != FeatureMap->end())
96
3
      return llvm::None;
97
213
    (*FeatureMap)[Feature] = IsOn;
98
213
    Features = Splits.second;
99
213
  }
100
138
  return Processor;
101
144
}
102
103
llvm::Optional<llvm::StringRef>
104
parseTargetID(const llvm::Triple &T, llvm::StringRef TargetID,
105
928
              llvm::StringMap<bool> *FeatureMap) {
106
928
  auto OptionalProcessor =
107
928
      parseTargetIDWithFormatCheckingOnly(TargetID, FeatureMap);
108
928
109
928
  if (!OptionalProcessor)
110
6
    return llvm::None;
111
922
112
922
  llvm::StringRef Processor =
113
922
      getCanonicalProcessorName(T, OptionalProcessor.getValue());
114
922
  if (Processor.empty())
115
9
    return llvm::None;
116
913
117
913
  llvm::SmallSet<llvm::StringRef, 4> AllFeatures;
118
913
  for (auto &&F : getAllPossibleTargetIDFeatures(T, Processor))
119
940
    AllFeatures.insert(F);
120
913
121
913
  for (auto &&F : *FeatureMap)
122
178
    if (!AllFeatures.count(F.first()))
123
9
      return llvm::None;
124
913
125
904
  return Processor;
126
913
}
127
128
// A canonical target ID is a target ID containing a canonical processor name
129
// and features in alphabetical order.
130
std::string getCanonicalTargetID(llvm::StringRef Processor,
131
289
                                 const llvm::StringMap<bool> &Features) {
132
289
  std::string TargetID = Processor.str();
133
289
  std::map<const llvm::StringRef, bool> OrderedMap;
134
289
  for (const auto &F : Features)
135
37
    OrderedMap[F.first()] = F.second;
136
289
  for (auto F : OrderedMap)
137
37
    TargetID = TargetID + ':' + F.first.str() + (F.second ? 
"+"22
:
"-"15
);
138
289
  return TargetID;
139
289
}
140
141
// For a specific processor, a feature either shows up in all target IDs, or
142
// does not show up in any target IDs. Otherwise the target ID combination
143
// is invalid.
144
llvm::Optional<std::pair<llvm::StringRef, llvm::StringRef>>
145
138
getConflictTargetIDCombination(const std::set<llvm::StringRef> &TargetIDs) {
146
138
  struct Info {
147
138
    llvm::StringRef TargetID;
148
138
    llvm::StringMap<bool> Features;
149
138
  };
150
138
  llvm::StringMap<Info> FeatureMap;
151
178
  for (auto &&ID : TargetIDs) {
152
178
    llvm::StringMap<bool> Features;
153
178
    llvm::StringRef Proc =
154
178
        parseTargetIDWithFormatCheckingOnly(ID, &Features).getValue();
155
178
    auto Loc = FeatureMap.find(Proc);
156
178
    if (Loc == FeatureMap.end())
157
172
      FeatureMap[Proc] = Info{ID, Features};
158
6
    else {
159
6
      auto &ExistingFeatures = Loc->second.Features;
160
9
      if (
llvm::any_of(Features, [&](auto &F) 6
{
161
9
            return ExistingFeatures.count(F.first()) == 0;
162
9
          }))
163
1
        return std::make_pair(Loc->second.TargetID, ID);
164
6
    }
165
178
  }
166
137
  return llvm::None;
167
138
}
168
169
} // namespace clang