re PR target/78357 (nios2 uses non-standard atomic functions)

2016-11-17  Chung-Lin Tang  <cltang@codesourcery.com>

	PR target/78357
	* config/nios2/nios2.c (nios2_init_libfuncs): Remove TARGET_LINUX_ABI
	condition.
	(TARGET_INIT_LIBFUNCS): Delete definition and...
	* config/nios2/linux.h (TARGET_INIT_LIBFUNCS): ...move to here, add
	comments.

From-SVN: r242534

gcc/ChangeLog

+2016-11-17  Chung-Lin Tang  <cltang@codesourcery.com>
+
+	PR target/78357
+	* config/nios2/nios2.c (nios2_init_libfuncs): Remove TARGET_LINUX_ABI
+	condition.
+	(TARGET_INIT_LIBFUNCS): Delete definition and...
+	* config/nios2/linux.h (TARGET_INIT_LIBFUNCS): ...move to here, add
+	comments.
+
 2016-11-17  Krister Walfridsson  <krister.walfridsson@gmail.com>
 
 	* config/netbsd-stdint.h: New.

gcc/config/nios2/linux.h

@@ -44,3 +44,7 @@
    Nios II Processor Reference Handbook.  */
 #define TARGET_LINUX_ABI 1
 
+/* For Linux, we have access to kernel support for atomic operations,
+   add initialization for __sync_* builtins.  */
+#undef TARGET_INIT_LIBFUNCS
+#define TARGET_INIT_LIBFUNCS nios2_init_libfuncs

gcc/config/nios2/nios2.c

@@ -3607,9 +3607,7 @@ nios2_expand_builtin (tree exp, rtx target, rtx subtarget ATTRIBUTE_UNUSED,
 static void
 nios2_init_libfuncs (void)
 {
-  /* For Linux, we have access to kernel support for atomic operations.  */
-  if (TARGET_LINUX_ABI)
-    init_sync_libfuncs (UNITS_PER_WORD);
+  init_sync_libfuncs (UNITS_PER_WORD);
 }
 
 
@@ -4986,9 +4984,6 @@ nios2_adjust_reg_alloc_order (void)
 #undef TARGET_BUILTIN_DECL
 #define TARGET_BUILTIN_DECL nios2_builtin_decl
 
-#undef TARGET_INIT_LIBFUNCS
-#define TARGET_INIT_LIBFUNCS nios2_init_libfuncs
-
 #undef TARGET_FUNCTION_OK_FOR_SIBCALL
 #define TARGET_FUNCTION_OK_FOR_SIBCALL hook_bool_tree_tree_true