+//===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
-// 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.
+// 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
-// -c - Print C code instead of LLVM assembly
//
//===----------------------------------------------------------------------===//
+#include "llvm/LLVMContext.h"
#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;
+#include "llvm/PassManager.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 <memory>
+using namespace llvm;
-// 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 bitcode>"), cl::init("-"));
-static cl::opt<string>
-InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
-
-static cl::opt<string>
+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));
+static cl::opt<bool>
+DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
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;
- }
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
- 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());
+ LLVMContext Context;
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ try {
+ cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
+
+ raw_ostream *Out = &outs(); // Default to printing to stdout.
+ std::string ErrorMessage;
+
+ std::auto_ptr<Module> M;
+
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
+ delete Buffer;
}
- } else {
- if (InputFilename == "-") {
- OutputFilename = "-";
+
+ if (M.get() == 0) {
+ cerr << argv[0] << ": ";
+ if (ErrorMessage.size())
+ cerr << ErrorMessage << "\n";
+ else
+ cerr << "bitcode didn't read correctly.\n";
+ return 1;
+ }
+
+ if (DontPrint) {
+ // Just use stdout. We won't actually print anything on it.
+ } else if (OutputFilename != "") { // Specified an output filename?
+ if (OutputFilename != "-") { // Not stdout?
+ 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 {
- 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);
+ if (InputFilename == "-") {
+ OutputFilename = "-";
} else {
- OutputFilename = IFN; // Append a .ll to it
- }
- if (WriteMode == c)
- OutputFilename += ".c";
- else
- OutputFilename += ".ll";
+ 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)+".ll";
+ } else {
+ OutputFilename = IFN+".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());
+ 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 unlink'd from the disk if we get a
+ // Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
- RemoveFileOnSignal(OutputFilename);
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
}
- }
- if (!Out->good()) {
- cerr << "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...
- //
- switch (WriteMode) {
- case llvm:
- (*Out) << M; // Output LLVM assembly
- break;
- case c:
- WriteToC(M, *Out); // Convert LLVM to C
- break;
+ if (Out != &outs())
+ delete Out;
+ return 0;
+ } catch (const std::string& msg) {
+ cerr << argv[0] << ": " << msg << "\n";
+ } catch (...) {
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
- delete M;
- if (Out != &std::cout) delete Out;
- return 0;
+ return 1;
}
projects / oota-llvm.git / blobdiff