/
Benchmark.cpp
171 lines (155 loc) · 5.73 KB
/
Benchmark.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
//===--- Benchmark.cpp - clang pseudoparser benchmarks ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Benchmark for the overall pseudoparser performance, it also includes other
// important pieces of the pseudoparser (grammar compliation, LR table build
// etc).
//
// Note: make sure to build the benchmark in Release mode.
//
// Usage:
// tools/clang/tools/extra/pseudo/benchmarks/ClangPseudoBenchmark \
// --grammar=../clang-tools-extra/pseudo/lib/cxx.bnf \
// --source=../clang/lib/Sema/SemaDecl.cpp
//
//===----------------------------------------------------------------------===//
#include "benchmark/benchmark.h"
#include "clang-pseudo/Bracket.h"
#include "clang-pseudo/DirectiveTree.h"
#include "clang-pseudo/Forest.h"
#include "clang-pseudo/GLR.h"
#include "clang-pseudo/Token.h"
#include "clang-pseudo/grammar/Grammar.h"
#include "clang-pseudo/grammar/LRTable.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <string>
using llvm::cl::desc;
using llvm::cl::opt;
using llvm::cl::Required;
static opt<std::string> GrammarFile("grammar",
desc("Parse and check a BNF grammar file."),
Required);
static opt<std::string> Source("source", desc("Source file"), Required);
namespace clang {
namespace pseudo {
namespace bench {
namespace {
const std::string *GrammarText = nullptr;
const std::string *SourceText = nullptr;
const Grammar *G = nullptr;
void setupGrammarAndSource() {
auto ReadFile = [](llvm::StringRef FilePath) -> std::string {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> GrammarText =
llvm::MemoryBuffer::getFile(FilePath);
if (std::error_code EC = GrammarText.getError()) {
llvm::errs() << "Error: can't read file '" << FilePath
<< "': " << EC.message() << "\n";
std::exit(1);
}
return GrammarText.get()->getBuffer().str();
};
GrammarText = new std::string(ReadFile(GrammarFile));
SourceText = new std::string(ReadFile(Source));
std::vector<std::string> Diags;
G = Grammar::parseBNF(*GrammarText, Diags).release();
}
static void parseBNF(benchmark::State &State) {
std::vector<std::string> Diags;
for (auto _ : State)
Grammar::parseBNF(*GrammarText, Diags);
}
BENCHMARK(parseBNF);
static void buildSLR(benchmark::State &State) {
for (auto _ : State)
LRTable::buildSLR(*G);
}
BENCHMARK(buildSLR);
TokenStream lexAndPreprocess() {
clang::LangOptions LangOpts = genericLangOpts();
TokenStream RawStream = pseudo::lex(*SourceText, LangOpts);
auto DirectiveStructure = DirectiveTree::parse(RawStream);
chooseConditionalBranches(DirectiveStructure, RawStream);
TokenStream Cook =
cook(DirectiveStructure.stripDirectives(RawStream), LangOpts);
auto Stream = stripComments(Cook);
pairBrackets(Stream);
return Stream;
}
static void lex(benchmark::State &State) {
clang::LangOptions LangOpts = genericLangOpts();
for (auto _ : State)
clang::pseudo::lex(*SourceText, LangOpts);
State.SetBytesProcessed(static_cast<uint64_t>(State.iterations()) *
SourceText->size());
}
BENCHMARK(lex);
static void pairBrackets(benchmark::State &State) {
clang::LangOptions LangOpts = genericLangOpts();
auto Stream = clang::pseudo::lex(*SourceText, LangOpts);
for (auto _ : State)
pairBrackets(Stream);
State.SetBytesProcessed(static_cast<uint64_t>(State.iterations()) *
SourceText->size());
}
BENCHMARK(pairBrackets);
static void preprocess(benchmark::State &State) {
clang::LangOptions LangOpts = genericLangOpts();
TokenStream RawStream = clang::pseudo::lex(*SourceText, LangOpts);
for (auto _ : State) {
auto DirectiveStructure = DirectiveTree::parse(RawStream);
chooseConditionalBranches(DirectiveStructure, RawStream);
stripComments(
cook(DirectiveStructure.stripDirectives(RawStream), LangOpts));
}
State.SetBytesProcessed(static_cast<uint64_t>(State.iterations()) *
SourceText->size());
}
BENCHMARK(preprocess);
static void glrParse(benchmark::State &State) {
LRTable Table = clang::pseudo::LRTable::buildSLR(*G);
SymbolID StartSymbol = *G->findNonterminal("translation-unit");
TokenStream Stream = lexAndPreprocess();
for (auto _ : State) {
pseudo::ForestArena Forest;
pseudo::GSS GSS;
pseudo::glrParse(Stream, ParseParams{*G, Table, Forest, GSS}, StartSymbol);
}
State.SetBytesProcessed(static_cast<uint64_t>(State.iterations()) *
SourceText->size());
}
BENCHMARK(glrParse);
static void full(benchmark::State &State) {
LRTable Table = clang::pseudo::LRTable::buildSLR(*G);
SymbolID StartSymbol = *G->findNonterminal("translation-unit");
for (auto _ : State) {
TokenStream Stream = lexAndPreprocess();
pseudo::ForestArena Forest;
pseudo::GSS GSS;
pseudo::glrParse(lexAndPreprocess(), ParseParams{*G, Table, Forest, GSS},
StartSymbol);
}
State.SetBytesProcessed(static_cast<uint64_t>(State.iterations()) *
SourceText->size());
}
BENCHMARK(full);
} // namespace
} // namespace bench
} // namespace pseudo
} // namespace clang
int main(int argc, char *argv[]) {
benchmark::Initialize(&argc, argv);
llvm::cl::ParseCommandLineOptions(argc, argv);
clang::pseudo::bench::setupGrammarAndSource();
benchmark::RunSpecifiedBenchmarks();
return 0;
}