llvm-cat.cpp
3.39 KB
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
//===- llvm-cat.cpp - LLVM module concatenation utility -------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This program is for testing features that rely on multi-module bitcode files.
// It takes a list of input modules and uses them to create a multi-module
// bitcode file.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallVector.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <memory>
#include <string>
#include <system_error>
#include <vector>
using namespace llvm;
cl::OptionCategory CatCategory("llvm-cat Options");
static cl::opt<bool>
BinaryCat("b", cl::desc("Whether to perform binary concatenation"),
cl::cat(CatCategory));
static cl::opt<std::string> OutputFilename("o", cl::Required,
cl::desc("Output filename"),
cl::value_desc("filename"),
cl::cat(CatCategory));
static cl::list<std::string> InputFilenames(cl::Positional, cl::ZeroOrMore,
cl::desc("<input files>"),
cl::cat(CatCategory));
int main(int argc, char **argv) {
cl::HideUnrelatedOptions(CatCategory);
cl::ParseCommandLineOptions(argc, argv, "Module concatenation");
ExitOnError ExitOnErr("llvm-cat: ");
LLVMContext Context;
SmallVector<char, 0> Buffer;
BitcodeWriter Writer(Buffer);
if (BinaryCat) {
for (const auto &InputFilename : InputFilenames) {
std::unique_ptr<MemoryBuffer> MB = ExitOnErr(
errorOrToExpected(MemoryBuffer::getFileOrSTDIN(InputFilename)));
std::vector<BitcodeModule> Mods = ExitOnErr(getBitcodeModuleList(*MB));
for (auto &BitcodeMod : Mods) {
Buffer.insert(Buffer.end(), BitcodeMod.getBuffer().begin(),
BitcodeMod.getBuffer().end());
Writer.copyStrtab(BitcodeMod.getStrtab());
}
}
} else {
// The string table does not own strings added to it, some of which are
// owned by the modules; keep them alive until we write the string table.
std::vector<std::unique_ptr<Module>> OwnedMods;
for (const auto &InputFilename : InputFilenames) {
SMDiagnostic Err;
std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
if (!M) {
Err.print(argv[0], errs());
return 1;
}
Writer.writeModule(*M);
OwnedMods.push_back(std::move(M));
}
Writer.writeStrtab();
}
std::error_code EC;
raw_fd_ostream OS(OutputFilename, EC, sys::fs::OpenFlags::OF_None);
if (EC) {
errs() << argv[0] << ": cannot open " << OutputFilename << " for writing: "
<< EC.message();
return 1;
}
OS.write(Buffer.data(), Buffer.size());
return 0;
}