mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
93c26685bf
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3905 91177308-0d34-0410-b5e6-96231b3b80d8
125 lines
3.8 KiB
C++
125 lines
3.8 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/PassManager.h"
|
|
#include "llvm/Bytecode/Reader.h"
|
|
#include "llvm/Assembly/CWriter.h"
|
|
#include "llvm/Assembly/PrintModulePass.h"
|
|
#include "Support/CommandLine.h"
|
|
#include "Support/Signals.h"
|
|
#include <fstream>
|
|
#include <memory>
|
|
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
|
|
};
|
|
|
|
static cl::opt<std::string>
|
|
InputFilename(cl::Positional, cl::desc("<input bytecode>"), 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<enum OutputMode>
|
|
WriteMode(cl::desc("Specify the output format:"),
|
|
cl::values(
|
|
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...
|
|
|
|
std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
|
|
if (M.get() == 0) {
|
|
cerr << argv[0] << ": 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 << 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);
|
|
} 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 << 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 unlink'd from the disk if we get a
|
|
// SIGINT
|
|
RemoveFileOnSignal(OutputFilename);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!Out->good()) {
|
|
cerr << argv[0] << ": 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...
|
|
//
|
|
PassManager Passes;
|
|
|
|
switch (WriteMode) {
|
|
case llvm: // Output LLVM assembly
|
|
Passes.add(new PrintModulePass(Out));
|
|
break;
|
|
case c: // Convert LLVM to C
|
|
Passes.add(createWriteToCPass(*Out));
|
|
break;
|
|
}
|
|
|
|
Passes.run(*M.get());
|
|
|
|
if (Out != &std::cout) {
|
|
((std::ofstream*)Out)->close();
|
|
delete Out;
|
|
}
|
|
return 0;
|
|
}
|
|
|