llvm-6502/tools/llvm-dis/llvm-dis.cpp
Chris Lattner aa3904faff Clean up dis so that it does not print out code in various traversal orders.
Now it only output llvm or C code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2564 91177308-0d34-0410-b5e6-96231b3b80d8
2002-05-09 01:25:55 +00:00

109 lines
3.4 KiB
C++

//===----------------------------------------------------------------------===//
// LLVM 'DIS' UTILITY
//
// This utility may be invoked in the following manner:
// dis [options] - Read LLVM bytecode from stdin, write assembly to stdout
// dis [options] x.bc - Read LLVM bytecode from the x.bc file, write assembly
// to the x.ll file.
// Options:
// --help - Output information about command line switches
// -c - Print C code instead of LLVM assembly
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Support/CFG.h"
#include "Support/CommandLine.h"
#include "Support/Signals.h"
#include "llvm/Assembly/CWriter.h"
#include <fstream>
#include <iostream>
using std::cerr;
// OutputMode - The different orderings to print basic blocks in...
enum OutputMode {
llvm = 0, // Generate LLVM assembly (the default)
c, // Generate C code
};
cl::String InputFilename ("", "Load <arg> file, print as assembly", 0, "-");
cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
cl::EnumFlags<enum OutputMode> WriteMode(cl::NoFlags,
clEnumVal(llvm, "Output LLVM assembly"),
clEnumVal(c , "Output C code for program"),
0);
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm .bc -> .ll disassembler\n");
std::ostream *Out = &std::cout; // Default to printing to stdout...
Module *M = ParseBytecodeFile(InputFilename);
if (M == 0) {
cerr << "bytecode didn't read correctly.\n";
return 1;
}
if (OutputFilename != "") { // Specified an output filename?
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << "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);
} else {
OutputFilename = IFN; // Append a .ll to it
}
if (WriteMode == c)
OutputFilename += ".c";
else
OutputFilename += ".ll";
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << "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 unlink'd from the disk if we get a
// SIGINT
RemoveFileOnSignal(OutputFilename);
}
}
}
if (!Out->good()) {
cerr << "Error opening " << OutputFilename
<< ": sending to stdout instead!\n";
Out = &std::cout;
}
// All that dis does is write the assembly or C out to a file...
//
switch (WriteMode) {
case llvm:
(*Out) << M; // Output LLVM assembly
break;
case c:
WriteToC(M, *Out); // Convert LLVM to C
break;
}
delete M;
if (Out != &std::cout) delete Out;
return 0;
}