Import LLVM, at r72732.

1 files changed, 58 insertions, 0 deletions

diff --git a/lib/Support/SystemUtils.cpp b/lib/Support/SystemUtils.cpp
new file mode 100644
index 0000000..80d6e4c
--- /dev/null
+++ b/lib/Support/SystemUtils.cpp
@@ -0,0 +1,58 @@
+//===- SystemUtils.cpp - Utilities for low-level system tasks -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains functions used to do a variety of low-level, often
+// system-specific, tasks.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Streams.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/System/Process.h"
+#include "llvm/System/Program.h"
+#include <ostream>
+using namespace llvm;
+
+bool llvm::CheckBitcodeOutputToConsole(std::ostream* stream_to_check,
+                                       bool print_warning) {
+  if (stream_to_check == cout.stream() &&
+      sys::Process::StandardOutIsDisplayed()) {
+    if (print_warning) {
+      cerr << "WARNING: You're attempting to print out a bitcode file.\n"
+           << "This is inadvisable as it may cause display problems. If\n"
+           << "you REALLY want to taste LLVM bitcode first-hand, you\n"
+           << "can force output with the `-f' option.\n\n";
+    }
+    return true;
+  }
+  return false;
+}
+
+/// FindExecutable - Find a named executable, giving the argv[0] of program
+/// being executed. This allows us to find another LLVM tool if it is built
+/// into the same directory, but that directory is neither the current
+/// directory, nor in the PATH.  If the executable cannot be found, return an
+/// empty string.
+///
+#undef FindExecutable   // needed on windows :(
+sys::Path llvm::FindExecutable(const std::string &ExeName,
+                               const std::string &ProgramPath) {
+  // First check the directory that the calling program is in.  We can do this
+  // if ProgramPath contains at least one / character, indicating that it is a
+  // relative path to bugpoint itself.
+  sys::Path Result ( ProgramPath );
+  Result.eraseComponent();
+  if (!Result.isEmpty()) {
+    Result.appendComponent(ExeName);
+    if (Result.canExecute())
+      return Result;
+  }
+
+  return sys::Program::FindProgramByName(ExeName);
+}