Index: clang/tools/clang-format/ClangFormat.cpp
===================================================================
--- clang/tools/clang-format/ClangFormat.cpp
+++ clang/tools/clang-format/ClangFormat.cpp
@@ -23,7 +23,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Process.h"
-#include "llvm/Support/Signals.h"
+#include "llvm/Support/InitLLVM.h"
 
 using namespace llvm;
 using clang::tooling::Replacements;
@@ -338,21 +338,13 @@
 }
 
 int main(int argc, const char **argv) {
-  llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
-
-  SmallVector<const char *, 256> Args;
-  llvm::SpecificBumpPtrAllocator<char> ArgAllocator;
-  std::error_code EC = llvm::sys::Process::GetArgumentVector(
-      Args, llvm::makeArrayRef(argv, argc), ArgAllocator);
-  if (EC) {
-    llvm::errs() << "error: couldn't get arguments: " << EC.message() << '\n';
-  }
+  llvm::InitLLVM X(argc, argv);
 
   cl::HideUnrelatedOptions(ClangFormatCategory);
 
   cl::SetVersionPrinter(PrintVersion);
   cl::ParseCommandLineOptions(
-      Args.size(), &Args[0],
+      argc, argv,
       "A tool to format C/C++/Java/JavaScript/Objective-C/Protobuf code.\n\n"
       "If no arguments are specified, it formats the code from standard input\n"
       "and writes the result to the standard output.\n"
Index: clang/tools/driver/driver.cpp
===================================================================
--- clang/tools/driver/driver.cpp
+++ clang/tools/driver/driver.cpp
@@ -34,9 +34,8 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Host.h"
-#include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Path.h"
-#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/InitLLVM.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/Program.h"
 #include "llvm/Support/Regex.h"
@@ -322,22 +321,12 @@
 }
 
 int main(int argc_, const char **argv_) {
-  llvm::sys::PrintStackTraceOnErrorSignal(argv_[0]);
-  llvm::PrettyStackTraceProgram X(argc_, argv_);
-  llvm::llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+  llvm::InitLLVM X(argc_, argv_);
+  SmallVector<const char *, 256> argv(argv_, argv_ + argc_);
 
   if (llvm::sys::Process::FixupStandardFileDescriptors())
     return 1;
 
-  SmallVector<const char *, 256> argv;
-  llvm::SpecificBumpPtrAllocator<char> ArgAllocator;
-  std::error_code EC = llvm::sys::Process::GetArgumentVector(
-      argv, llvm::makeArrayRef(argv_, argc_), ArgAllocator);
-  if (EC) {
-    llvm::errs() << "error: couldn't get arguments: " << EC.message() << '\n';
-    return 1;
-  }
-
   llvm::InitializeAllTargets();
   auto TargetAndMode = ToolChain::getTargetAndModeFromProgramName(argv[0]);