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
|
//===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
// llvm-dis [options] - Read LLVM bitcode from stdin, write asm to stdout
// llvm-dis [options] x.bc - Read LLVM bitcode from the x.bc file, write asm
// to the x.ll file.
// Options:
// --help - Output information about command line switches
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Streams.h"
#include "llvm/System/Signals.h"
#include <iostream>
#include <fstream>
#include <memory>
using namespace llvm;
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
static cl::opt<std::string>
OutputFilename("o", cl::desc("Override output filename"),
cl::value_desc("filename"));
static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
static cl::opt<bool>
DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
try {
cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
sys::PrintStackTraceOnErrorSignal();
std::ostream *Out = &std::cout; // Default to printing to stdout.
std::string ErrorMessage;
std::auto_ptr<Module> M;
if (MemoryBuffer *Buffer
= MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
delete Buffer;
}
if (M.get() == 0) {
cerr << argv[0] << ": ";
if (ErrorMessage.size())
cerr << ErrorMessage << "\n";
else
cerr << "bitcode didn't read correctly.\n";
return 1;
}
if (DontPrint) {
// Just use stdout. We won't actually print anything on it.
} else if (OutputFilename != "") { // Specified an output filename?
if (OutputFilename != "-") { // Not stdout?
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists! Sending to standard output.\n";
} else {
Out = new std::ofstream(OutputFilename.c_str());
}
}
} else {
if (InputFilename == "-") {
OutputFilename = "-";
} else {
std::string IFN = InputFilename;
int Len = IFN.length();
if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
// Source ends in .bc
OutputFilename = std::string(IFN.begin(), IFN.end()-3)+".ll";
} else {
OutputFilename = IFN+".ll";
}
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists! Sending to standard output.\n";
} else {
Out = new std::ofstream(OutputFilename.c_str());
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
}
}
if (!Out->good()) {
cerr << argv[0] << ": error opening " << OutputFilename
<< ": sending to stdout instead!\n";
Out = &std::cout;
}
// All that llvm-dis does is write the assembly to a file.
if (!DontPrint) {
PassManager Passes;
OStream L(*Out);
Passes.add(createPrintModulePass(&L));
Passes.run(*M.get());
}
if (Out != &std::cout) {
((std::ofstream*)Out)->close();
delete Out;
}
return 0;
} catch (const std::string& msg) {
cerr << argv[0] << ": " << msg << "\n";
} catch (...) {
cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
return 1;
}
|
