Subzero. Performance tweaks.

src/IceTLS.h

 //===- subzero/src/IceTLS.h - thread_local workaround -----------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 48 matching lines @@
 // defining C::F, we create two static fields:
 //   static pthread_key_t F__key;
 //   static int F__initStatus;
 //
 // The F__initStatus field is used to hold the result of the
 // pthread_key_create() call, where a zero value indicates success, and a
 // nonzero value indicates failure or that ICE_TLS_INIT_FIELD() was never
 // called. The F__key field is used as the argument to pthread_getspecific()
 // and pthread_setspecific().
 
+#include "llvm/Support/ErrorHandling.h"
+
 #include <pthread.h>
 
 #define ICE_TLS_DECLARE_FIELD(Type, FieldName)                                 \
   using FieldName##__type = Type;                                              \
   static pthread_key_t FieldName##__key;                                       \
   static int FieldName##__initStatus
 #define ICE_TLS_DEFINE_FIELD(Type, ClassName, FieldName)                       \
   pthread_key_t ClassName::FieldName##__key;                                   \
   int ClassName::FieldName##__initStatus = 1
 #define ICE_TLS_INIT_FIELD(FieldName)                                          \
@@ skipping 25 matching lines @@
 #define ICE_TLS_GET_FIELD(FieldName) (FieldName)
 #define ICE_TLS_SET_FIELD(FieldName, Value) (FieldName = (Value))
 
 #endif // !ICE_THREAD_LOCAL_HACK
 
 ///
 /// @}
 ///
 
 #endif // SUBZERO_SRC_ICETLS_H