From 18cde6df91a33d62a334002a7b608917c07791e8 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 18 Aug 2010 17:55:15 +0000
Subject: [PATCH] Eliminate some redundancy by relying on raw_fd_ostream to
 handle "-" properly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111373 91177308-0d34-0410-b5e6-96231b3b80d8
---
 tools/llc/llc.cpp | 75 +++++++++++++++++++++--------------------------
 1 file changed, 33 insertions(+), 42 deletions(-)

diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index 5a23b277104..a7d1fa0311e 100644
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -127,66 +127,57 @@ GetFileNameRoot(const std::string &InputFilename) {
 static formatted_raw_ostream *GetOutputStream(const char *TargetName,
                                               Triple::OSType OS,
                                               const char *ProgName) {
-  if (!OutputFilename.empty()) {
-    // Make sure that the Out file gets unlinked from the disk if we get a
-    // SIGINT
-    if (OutputFilename != "-")
-      sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+  // If we don't yet have an output filename, make one.
+  if (OutputFilename.empty()) {
+    if (InputFilename == "-")
+      OutputFilename = "-";
+    else {
+      OutputFilename = GetFileNameRoot(InputFilename);
 
-    std::string error;
-    raw_fd_ostream *FDOut =
-      new raw_fd_ostream(OutputFilename.c_str(), error,
-                         raw_fd_ostream::F_Binary);
-    if (!error.empty()) {
-      errs() << error << '\n';
-      delete FDOut;
-      return 0;
+      switch (FileType) {
+      default: assert(0 && "Unknown file type");
+      case TargetMachine::CGFT_AssemblyFile:
+        if (TargetName[0] == 'c') {
+          if (TargetName[1] == 0)
+            OutputFilename += ".cbe.c";
+          else if (TargetName[1] == 'p' && TargetName[2] == 'p')
+            OutputFilename += ".cpp";
+          else
+            OutputFilename += ".s";
+        } else
+          OutputFilename += ".s";
+        break;
+      case TargetMachine::CGFT_ObjectFile:
+        if (OS == Triple::Win32)
+          OutputFilename += ".obj";
+        else
+          OutputFilename += ".o";
+        break;
+      case TargetMachine::CGFT_Null:
+        OutputFilename += ".null";
+        break;
+      }
     }
-    formatted_raw_ostream *Out =
-      new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM);
-
-    return Out;
   }
 
-  if (InputFilename == "-") {
-    OutputFilename = "-";
-    return new formatted_raw_ostream(outs(),
-                                     formatted_raw_ostream::PRESERVE_STREAM);
-  }
-
-  OutputFilename = GetFileNameRoot(InputFilename);
-
+  // Decide if we need "binary" output.
   bool Binary = false;
   switch (FileType) {
   default: assert(0 && "Unknown file type");
   case TargetMachine::CGFT_AssemblyFile:
-    if (TargetName[0] == 'c') {
-      if (TargetName[1] == 0)
-        OutputFilename += ".cbe.c";
-      else if (TargetName[1] == 'p' && TargetName[2] == 'p')
-        OutputFilename += ".cpp";
-      else
-        OutputFilename += ".s";
-    } else
-      OutputFilename += ".s";
     break;
   case TargetMachine::CGFT_ObjectFile:
-    if (OS == Triple::Win32)
-      OutputFilename += ".obj";
-    else
-      OutputFilename += ".o";
-    Binary = true;
-    break;
   case TargetMachine::CGFT_Null:
-    OutputFilename += ".null";
     Binary = true;
     break;
   }
 
   // Make sure that the Out file gets unlinked from the disk if we get a
   // SIGINT
-  sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+  if (OutputFilename != "-")
+    sys::RemoveFileOnSignal(sys::Path(OutputFilename));
 
+  // Open the file.
   std::string error;
   unsigned OpenFlags = 0;
   if (Binary) OpenFlags |= raw_fd_ostream::F_Binary;