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https://github.com/c64scene-ar/llvm-6502.git
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65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
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//===------------------------------------------------------------------------===
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// LLVM 'DIS' UTILITY
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//
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// This utility may be invoked in the following manner:
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// dis --help - Output information about command line switches
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// dis [options] - Read LLVM bytecode from stdin, write assembly to stdout
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// dis [options] x.bc - Read LLVM bytecode from the x.bc file, write assembly
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// to the x.ll file.
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//
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//===------------------------------------------------------------------------===
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#include <iostream.h>
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#include <fstream.h>
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#include "llvm/Module.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Bytecode/Reader.h"
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#include "llvm/Tools/CommandLine.h"
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int main(int argc, char **argv) {
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ToolCommandLine Opts(argc, argv, false);
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// We only support the options that the system parser does... if it left any
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// then we don't know what to do.
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//
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if (argc > 1) {
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for (int i = 1; i < argc; i++) {
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if (string(argv[i]) != string("--help"))
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cerr << argv[0] << ": argument not recognized: '" << argv[i] << "'!\n";
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}
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cerr << argv[0] << " usage:\n"
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<< " " << argv[0] << " --help - Print this usage information\n"
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<< " " << argv[0] << " x.bc - Parse <x.bc> file and output "
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<< "assembly to x.ll\n"
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<< " " << argv[0] << " - Parse stdin and write to stdout.\n";
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return 1;
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}
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ostream *Out = &cout; // Default to printing to stdout...
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Module *C = ParseBytecodeFile(Opts.getInputFilename());
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if (C == 0) {
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cerr << "bytecode didn't read correctly.\n";
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return 1;
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}
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if (Opts.getOutputFilename() != "-") {
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Out = new ofstream(Opts.getOutputFilename().c_str(),
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(Opts.getForce() ? 0 : ios::noreplace)|ios::out);
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if (!Out->good()) {
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cerr << "Error opening " << Opts.getOutputFilename()
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<< ": sending to stdout instead!\n";
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Out = &cout;
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}
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}
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// All that dis does is write the assembly out to a file... which is exactly
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// what the writer library is supposed to do...
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(*Out) << C;
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delete C;
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if (Out != &cout) delete Out;
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return 0;
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}
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