//===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
-//
+//
// 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 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 bytecode from stdin, write asm to stdout
-// llvm-dis [options] x.bc - Read LLVM bytecode from the x.bc file, write asm
+// 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/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
-#include "llvm/Bytecode/Reader.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/PrettyStackTrace.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Signals.h"
-#include <fstream>
#include <memory>
-
using namespace llvm;
static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
static cl::opt<std::string>
-OutputFilename("o", cl::desc("Override output filename"),
+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>
-CWriteMode("c", cl::desc("Obsolete option, do not use"), cl::ReallyHidden);
+DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
int main(int argc, char **argv) {
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ LLVMContext Context;
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
try {
- cl::ParseCommandLineOptions(argc, argv, " llvm .bc -> .ll disassembler\n");
- sys::PrintStackTraceOnErrorSignal();
+ cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
- std::ostream *Out = &std::cout; // Default to printing to stdout...
+ raw_ostream *Out = &outs(); // Default to printing to stdout.
std::string ErrorMessage;
- if (CWriteMode) {
- std::cerr << "ERROR: llvm-dis no longer contains the C backend. "
- << "Use 'llc -march=c' instead!\n";
- exit(1);
+ std::auto_ptr<Module> M;
+
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
+ delete Buffer;
}
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
if (M.get() == 0) {
- std::cerr << argv[0] << ": ";
+ cerr << argv[0] << ": ";
if (ErrorMessage.size())
- std::cerr << ErrorMessage << "\n";
+ cerr << ErrorMessage << "\n";
else
- std::cerr << "bytecode didn't read correctly.\n";
+ cerr << "bitcode didn't read correctly.\n";
return 1;
}
- if (OutputFilename != "") { // Specified an output filename?
+ 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!
- std::cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists! Sending to standard output.\n";
- } else {
- Out = new std::ofstream(OutputFilename.c_str());
+ std::string ErrorInfo;
+ Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/false,
+ Force, ErrorInfo);
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ if (!Force)
+ errs() << "Use -f command line argument to force output\n";
+ delete Out;
+ return 1;
}
}
} else {
OutputFilename = IFN+".ll";
}
- 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! 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));
+ std::string ErrorInfo;
+ Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/false,
+ Force, ErrorInfo);
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ if (!Force)
+ errs() << "Use -f command line argument to force output\n";
+ delete Out;
+ return 1;
}
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
}
- if (!Out->good()) {
- std::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;
+ Passes.add(createPrintModulePass(Out));
+ Passes.run(*M.get());
}
- // All that dis does is write the assembly or C out to a file...
- //
- PassManager Passes;
- Passes.add(new PrintModulePass(Out));
- Passes.run(*M.get());
-
- if (Out != &std::cout) {
- ((std::ofstream*)Out)->close();
+ if (Out != &outs())
delete Out;
- }
return 0;
} catch (const std::string& msg) {
- std::cerr << argv[0] << ": " << msg << "\n";
+ cerr << argv[0] << ": " << msg << "\n";
} catch (...) {
- std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
+
return 1;
}
projects / oota-llvm.git / blobdiff