Move the space in overview output for commands out of each of the

[oota-llvm.git] / tools / llvm-dis / llvm-dis.cpp

diff --git a/tools/llvm-dis/llvm-dis.cpp b/tools/llvm-dis/llvm-dis.cpp
index 0f189910f339cc84adb78ca9dea988a3db871245..27666906e25b5068eae408b33ec78f221efabc8f 100644 (file)
--- a/tools/llvm-dis/llvm-dis.cpp
+++ b/tools/llvm-dis/llvm-dis.cpp
@@ -1,15 +1,15 @@
 //===-- 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 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
@@ -18,49 +18,65 @@
 
 #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/Streams.h"
 #include "llvm/System/Signals.h"
+#include <iostream>
 #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>
+DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
+
 int main(int argc, char **argv) {
+  llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
   try {
-    cl::ParseCommandLineOptions(argc, argv, " llvm .bc -> .ll disassembler\n");
+    cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
     sys::PrintStackTraceOnErrorSignal();
 
     std::ostream *Out = &std::cout;  // Default to printing to stdout.
     std::string ErrorMessage;
 
-    std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
+    std::auto_ptr<Module> M;
+   
+    if (MemoryBuffer *Buffer
+           = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+      M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
+      delete Buffer;
+    }
+
     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";
+          cerr << argv[0] << ": error opening '" << OutputFilename
+               << "': file exists! Sending to standard output.\n";
         } else {
           Out = new std::ofstream(OutputFilename.c_str());
         }
@@ -80,8 +96,8 @@ int main(int argc, char **argv) {
 
         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";
+          cerr << argv[0] << ": error opening '" << OutputFilename
+               << "': file exists! Sending to standard output.\n";
         } else {
           Out = new std::ofstream(OutputFilename.c_str());
 
@@ -93,15 +109,18 @@ int main(int argc, char **argv) {
     }
 
     if (!Out->good()) {
-      std::cerr << argv[0] << ": error opening " << OutputFilename
-                << ": sending to stdout instead!\n";
+      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.
-    PassManager Passes;
-    Passes.add(new PrintModulePass(Out));
-    Passes.run(*M.get());
+    if (!DontPrint) {
+      PassManager Passes;
+      OStream L(*Out);
+      Passes.add(new PrintModulePass(&L));
+      Passes.run(*M.get());
+    }
 
     if (Out != &std::cout) {
       ((std::ofstream*)Out)->close();
@@ -109,10 +128,11 @@ int main(int argc, char **argv) {
     }
     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;
 }