uselistorder: Pull the bit through WriteToBitcodFile()

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

diff --git a/tools/llvm-as/llvm-as.cpp b/tools/llvm-as/llvm-as.cpp
index 487e904900623ef1fe6d151db563790de791e784..1d48596a24f37d2cc547853b47e1e4bdf61ffe5d 100644 (file)
--- a/tools/llvm-as/llvm-as.cpp
+++ b/tools/llvm-as/llvm-as.cpp
@@ -15,18 +15,20 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/LLVMContext.h"
-#include "llvm/Module.h"
-#include "llvm/Assembly/Parser.h"
-#include "llvm/Analysis/Verifier.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/AsmParser/Parser.h"
 #include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/UseListOrder.h"
+#include "llvm/IR/Verifier.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
 #include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Signals.h"
+#include "llvm/Support/ToolOutputFile.h"
 #include <memory>
 using namespace llvm;
 
@@ -38,7 +40,7 @@ OutputFilename("o", cl::desc("Override output filename"),
                cl::value_desc("filename"));
 
 static cl::opt<bool>
-Force("f", cl::desc("Overwrite output files"));
+Force("f", cl::desc("Enable binary output on terminals"));
 
 static cl::opt<bool>
 DisableOutput("disable-output", cl::desc("Disable output"), cl::init(false));
@@ -50,72 +52,75 @@ static cl::opt<bool>
 DisableVerify("disable-verify", cl::Hidden,
               cl::desc("Do not run verifier on input LLVM (dangerous!)"));
 
+static void WriteOutputFile(const Module *M) {
+  // Infer the output filename if needed.
+  if (OutputFilename.empty()) {
+    if (InputFilename == "-") {
+      OutputFilename = "-";
+    } 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 .bc to it
+      }
+      OutputFilename += ".bc";
+    }
+  }
+
+  std::error_code EC;
+  std::unique_ptr<tool_output_file> Out(
+      new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+  if (EC) {
+    errs() << EC.message() << '\n';
+    exit(1);
+  }
+
+  if (Force || !CheckBitcodeOutputToConsole(Out->os(), true))
+    WriteBitcodeToFile(M, Out->os(), shouldPreserveBitcodeUseListOrder());
+
+  // Declare success.
+  Out->keep();
+}
+
 int main(int argc, char **argv) {
   // Print a stack trace if we signal out.
   sys::PrintStackTraceOnErrorSignal();
   PrettyStackTraceProgram X(argc, argv);
   LLVMContext &Context = getGlobalContext();
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
+
+  // Turn on -preserve-bc-uselistorder by default, but let the command-line
+  // override it.
+  setPreserveBitcodeUseListOrder(true);
+
   cl::ParseCommandLineOptions(argc, argv, "llvm .ll -> .bc assembler\n");
 
   // Parse the file now...
   SMDiagnostic Err;
-  std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename, Err, Context));
-  if (M.get() == 0) {
-    Err.Print(argv[0], errs());
+  std::unique_ptr<Module> M = parseAssemblyFile(InputFilename, Err, Context);
+  if (!M.get()) {
+    Err.print(argv[0], errs());
     return 1;
   }
 
   if (!DisableVerify) {
-    std::string Err;
-    if (verifyModule(*M.get(), ReturnStatusAction, &Err)) {
+    std::string ErrorStr;
+    raw_string_ostream OS(ErrorStr);
+    if (verifyModule(*M.get(), &OS)) {
       errs() << argv[0]
              << ": assembly parsed, but does not verify as correct!\n";
-      errs() << Err;
+      errs() << OS.str();
       return 1;
-    } 
+    }
   }
 
   if (DumpAsm) errs() << "Here's the assembly:\n" << *M.get();
 
-  // Infer the output filename if needed.
-  if (OutputFilename.empty()) {
-    if (InputFilename == "-") {
-      OutputFilename = "-";
-    } 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 .bc to it
-      }
-      OutputFilename += ".bc";
-    }
-  }
-  
-  std::string ErrorInfo;
-  std::auto_ptr<raw_ostream> Out
-  (new raw_fd_ostream(OutputFilename.c_str(), ErrorInfo,
-                      (Force?raw_fd_ostream::F_Force : 0) |
-                      raw_fd_ostream::F_Binary));
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
-    if (!Force)
-      errs() << "Use -f command line argument to force output\n";
-    return 1;
-  }
-  
-  
-  // Make sure that the Out file gets unlinked from the disk if we get a
-  // SIGINT.
-  if (OutputFilename != "-")
-    sys::RemoveFileOnSignal(sys::Path(OutputFilename));
-
   if (!DisableOutput)
-    if (Force || !CheckBitcodeOutputToConsole(*Out, true))
-      WriteBitcodeToFile(M.get(), *Out);
+    WriteOutputFile(M.get());
+
   return 0;
 }
-