provide default for HAVE_mem_thread_fence

gcc/ChangeLog:

2015-05-23  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* defaults.h (gen_mem_thread_fence): New function.
	(HAVE_mem_thread_fence): Add default definition.
	* optabs.c: Adjust.

From-SVN: r223620

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 360f01370b80943404551aad6c70eb20c8631676..2f40e8dc70a3b83dec9aef2d31453d64934f7dd6 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-05-23  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
+       * defaults.h (gen_mem_thread_fence): New function.
+       (HAVE_mem_thread_fence): Add default definition.
+       * optabs.c: Adjust.
+
 2015-05-23  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
        * combine.c (find_split_point): Check the value of HAVE_lo_sum

diff --git a/gcc/defaults.h b/gcc/defaults.h
index e7bbcb8e8aadfec95715b24d1b2db398ec9864f2..72b290aaf652f8cf5ada570e8264fabf8eef4403 100644 (file)
--- a/gcc/defaults.h
+++ b/gcc/defaults.h
@@ -1444,6 +1444,16 @@ gen_epilogue ()
 }
 #endif
 
+#ifndef HAVE_mem_thread_fence
+#define HAVE_mem_thread_fence 0
+static inline rtx
+gen_mem_thread_fence (rtx)
+{
+  gcc_unreachable ();
+  return NULL;
+}
+#endif
+
 #endif /* GCC_INSN_FLAGS_H  */
 
 #endif  /* ! GCC_DEFAULTS_H */

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 21150db1b2919f71a481d2e4a9f86a729c1dd132..197e4aef5f41ce895d41a0e32402d52ff33b36a1 100644 (file)
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -7589,10 +7589,6 @@ expand_asm_memory_barrier (void)
 /* This routine will either emit the mem_thread_fence pattern or issue a 
    sync_synchronize to generate a fence for memory model MEMMODEL.  */
 
-#ifndef HAVE_mem_thread_fence
-# define HAVE_mem_thread_fence 0
-# define gen_mem_thread_fence(x) (gcc_unreachable (), NULL_RTX)
-#endif
 #ifndef HAVE_memory_barrier
 # define HAVE_memory_barrier 0
 # define gen_memory_barrier()  (gcc_unreachable (), NULL_RTX)