-//===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===//
+//===--- llvm2cpp.cpp - LLVM IR to C++ Translator -------------------------===//
//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file was developed by Reid Spencer and 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-as --help - Output information about command line switches
-// llvm-as [options] - Read LLVM asm from stdin, write bytecode to stdout
-// llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bytecode
-// to the x.bc file.
+// This program converts an input LLVM assembly file (.ll) into a C++ source
+// file that makes calls to the LLVM C++ API to produce the same module. The
+// generated program verifies what it built and then runs the PrintAssemblyPass
+// to reproduce the input originally given to llvm2cpp.
+//
+// Use the --help option for help with command line options.
//
//===------------------------------------------------------------------------===
#include "llvm/Module.h"
-#include "llvm/Assembly/Parser.h"
-#include "llvm/Bytecode/Writer.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SystemUtils.h"
#include "llvm/System/Signals.h"
#include "CppWriter.h"
#include <fstream>
#include <iostream>
#include <memory>
-
using namespace llvm;
static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input LLVM assembly file>"),
+InputFilename(cl::Positional, cl::desc("<input LLVM bitcode file>"),
cl::init("-"));
static cl::opt<std::string>
static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
-static cl::opt<bool>
-DisableVerify("disable-verify", cl::Hidden,
- cl::desc("Do not run verifier on input LLVM (dangerous!)"));
-
int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .cpp assembler\n");
sys::PrintStackTraceOnErrorSignal();
int exitCode = 0;
std::ostream *Out = 0;
- try {
- // Parse the file now...
- std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename));
- if (M.get() == 0) {
- std::cerr << argv[0] << ": assembly didn't read correctly.\n";
- return 1;
- }
-
- try {
- if (!DisableVerify)
- verifyModule(*M.get(), ThrowExceptionAction);
- } catch (const std::string &Err) {
- std::cerr << argv[0]
- << ": assembly parsed, but does not verify as correct!\n";
- std::cerr << Err;
- return 1;
- }
+ std::string ErrorMessage;
+
+ std::auto_ptr<Module> M;
+ std::auto_ptr<MemoryBuffer> Buffer(
+ MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage));
+ if (Buffer.get())
+ M.reset(ParseBitcodeFile(Buffer.get(), &ErrorMessage));
+ if (M.get() == 0) {
+ std::cerr << argv[0] << ": ";
+ if (ErrorMessage.size())
+ std::cerr << ErrorMessage << "\n";
+ else
+ std::cerr << "bitcode didn't read correctly.\n";
+ return 1;
+ }
- 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!
- std::cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists!\n"
- << "Use -f command line argument to force output\n";
- return 1;
- }
- Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
- std::ios::trunc | std::ios::binary);
- } else { // Specified stdout
- // FIXME: cout is not binary!
- Out = &std::cout;
+ 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!
+ std::cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
}
+ Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+ std::ios::trunc | std::ios::binary);
+ } else { // Specified stdout
+ Out = &std::cout;
+ }
+ } else {
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ Out = &std::cout;
} else {
- if (InputFilename == "-") {
- OutputFilename = "-";
- Out = &std::cout;
+ std::string IFN = InputFilename;
+ int Len = IFN.length();
+ if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
+ // Source ends in .ll
+ OutputFilename = std::string(IFN.begin(), IFN.end()-3);
} else {
- std::string IFN = InputFilename;
- int Len = IFN.length();
- if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
- // Source ends in .ll
- OutputFilename = std::string(IFN.begin(), IFN.end()-3);
- } else {
- OutputFilename = IFN; // Append a .cpp to it
- }
- OutputFilename += ".cpp";
-
- if (!Force && std::ifstream(OutputFilename.c_str())) {
- // If force is not specified, make sure not to overwrite a file!
- std::cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists!\n"
- << "Use -f command line argument to force output\n";
- return 1;
- }
-
- Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
- std::ios::trunc | std::ios::binary);
- // Make sure that the Out file gets unlinked from the disk if we get a
- // SIGINT
- sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+ OutputFilename = IFN; // Append a .cpp to it
+ }
+ OutputFilename += ".cpp";
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ std::cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
}
- }
- if (!Out->good()) {
- std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
- return 1;
+ Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+ std::ios::trunc | std::ios::binary);
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
+ }
- WriteModuleToCppFile(M.get(), *Out);
-
- } catch (const ParseException &E) {
- std::cerr << argv[0] << ": " << E.getMessage() << "\n";
- exitCode = 1;
- } catch (const std::string& msg) {
- std::cerr << argv[0] << ": " << msg << "\n";
- exitCode = 1;
- } catch (...) {
- std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
- exitCode = 1;
+ if (!Out->good()) {
+ std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ return 1;
}
+ WriteModuleToCppFile(M.get(), *Out);
+
if (Out != &std::cout) delete Out;
return exitCode;
}
projects / oota-llvm.git / blobdiff