Revert "Fix Clang-tidy modernize-deprecated-headers warnings in remaining files; other minor fixes."

This reverts commit r265454 since it broke the build.  E.g.:

  http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_build/22413/

llvm-svn: 265459

1 files changed, 4 insertions, 7 deletions

diff --git a/llvm/lib/Support/RWMutex.cpp b/llvm/lib/Support/RWMutex.cpp
index 2a3239a22b2..3b6309cef21 100644
--- a/llvm/lib/Support/RWMutex.cpp
+++ b/llvm/lib/Support/RWMutex.cpp
@@ -13,6 +13,7 @@
 
 #include "llvm/Config/config.h"
 #include "llvm/Support/RWMutex.h"
+#include <cstring>
 
 //===----------------------------------------------------------------------===//
 //=== WARNING: Implementation here must contain only TRULY operating system
@@ -22,27 +23,23 @@
 #if !defined(LLVM_ENABLE_THREADS) || LLVM_ENABLE_THREADS == 0
 // Define all methods as no-ops if threading is explicitly disabled
 namespace llvm {
-
 using namespace sys;
-
 RWMutexImpl::RWMutexImpl() { }
 RWMutexImpl::~RWMutexImpl() { }
 bool RWMutexImpl::reader_acquire() { return true; }
 bool RWMutexImpl::reader_release() { return true; }
 bool RWMutexImpl::writer_acquire() { return true; }
 bool RWMutexImpl::writer_release() { return true; }
-
-} // end namespace llvm
+}
 #else
 
 #if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_RWLOCK_INIT)
 
 #include <cassert>
-#include <cstdlib>
 #include <pthread.h>
+#include <stdlib.h>
 
 namespace llvm {
-
 using namespace sys;
 
 // Construct a RWMutex using pthread calls
@@ -116,7 +113,7 @@ RWMutexImpl::writer_release()
   return errorcode == 0;
 }
 
-} // end namespace llvm
+}
 
 #elif defined(LLVM_ON_UNIX)
 #include "Unix/RWMutex.inc"