gcc/

	* defaults.h (HAVE_mem_thread_fence, gen_mem_thread_fence)
	(HAVE_memory_barrier, gen_memory_barrier, HAVE_mem_signal_fence)
	(gen_mem_signal_fence): Delete.
	* target-insns.def (mem_signal_fence, mem_thread_fence)
	(memory_barrier): New targetm instruction patterns.
	* optabs.c (expand_mem_thread_fence): Use them instead of HAVE_*/gen_*
	interface.
	(expand_mem_signal_fence): Likewise.

From-SVN: r225209

gcc/ChangeLog

 2015-06-30  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* defaults.h (HAVE_mem_thread_fence, gen_mem_thread_fence)
+	(HAVE_memory_barrier, gen_memory_barrier, HAVE_mem_signal_fence)
+	(gen_mem_signal_fence): Delete.
+	* target-insns.def (mem_signal_fence, mem_thread_fence)
+	(memory_barrier): New targetm instruction patterns.
+	* optabs.c (expand_mem_thread_fence): Use them instead of HAVE_*/gen_*
+	interface.
+	(expand_mem_signal_fence): Likewise.
+
+2015-06-30  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* defaults.h (HAVE_epilogue, gen_epilogue): Delete.
 	* target-insns.def (epilogue, prologue, sibcall_prologue): New
 	targetm instruction patterns.

gcc/defaults.h

@@ -1426,36 +1426,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 #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
-
-#ifndef HAVE_memory_barrier
-#define HAVE_memory_barrier 0
-static inline rtx
-gen_memory_barrier ()
-{
-  gcc_unreachable ();
-  return NULL;
-}
-#endif
-
-#ifndef HAVE_mem_signal_fence
-#define HAVE_mem_signal_fence 0
-static inline rtx
-gen_mem_signal_fence (rtx)
-{
-  gcc_unreachable ();
-  return NULL;
-}
-#endif
-
 #ifndef HAVE_load_multiple
 #define HAVE_load_multiple 0
 static inline rtx

gcc/optabs.c

@@ -7575,12 +7575,12 @@ expand_asm_memory_barrier (void)
 void
 expand_mem_thread_fence (enum memmodel model)
 {
-  if (HAVE_mem_thread_fence)
-    emit_insn (gen_mem_thread_fence (GEN_INT (model)));
+  if (targetm.have_mem_thread_fence ())
+    emit_insn (targetm.gen_mem_thread_fence (GEN_INT (model)));
   else if (!is_mm_relaxed (model))
     {
-      if (HAVE_memory_barrier)
-	emit_insn (gen_memory_barrier ());
+      if (targetm.have_memory_barrier ())
+	emit_insn (targetm.gen_memory_barrier ());
       else if (synchronize_libfunc != NULL_RTX)
 	emit_library_call (synchronize_libfunc, LCT_NORMAL, VOIDmode, 0);
       else
@@ -7594,8 +7594,8 @@ expand_mem_thread_fence (enum memmodel model)
 void
 expand_mem_signal_fence (enum memmodel model)
 {
-  if (HAVE_mem_signal_fence)
-    emit_insn (gen_mem_signal_fence (GEN_INT (model)));
+  if (targetm.have_mem_signal_fence ())
+    emit_insn (targetm.gen_mem_signal_fence (GEN_INT (model)));
   else if (!is_mm_relaxed (model))
     {
       /* By default targets are coherent between a thread and the signal

gcc/target-insns.def

@@ -32,6 +32,9 @@
    Instructions should be documented in md.texi rather than here.  */
 DEF_TARGET_INSN (canonicalize_funcptr_for_compare, (rtx x0, rtx x1))
 DEF_TARGET_INSN (epilogue, (void))
+DEF_TARGET_INSN (mem_signal_fence, (rtx x0))
+DEF_TARGET_INSN (mem_thread_fence, (rtx x0))
+DEF_TARGET_INSN (memory_barrier, (void))
 DEF_TARGET_INSN (prologue, (void))
 DEF_TARGET_INSN (return, (void))
 DEF_TARGET_INSN (sibcall_epilogue, (void))