builtins.c (HAVE_atomic_clear, [...]): Delete.

gcc/
	* builtins.c (HAVE_atomic_clear, gen_atomic_clear): Delete.
	(expand_builtin_atomic_clear): Remove support for atomic_clear
	pattern.

From-SVN: r226405

gcc/ChangeLog

+2015-07-30  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* builtins.c (HAVE_atomic_clear, gen_atomic_clear): Delete.
+	(expand_builtin_atomic_clear): Remove support for atomic_clear
+	pattern.
+
 2015-07-30  Richard Biener  <rguenther@suse.de>
 
 	* gimple-fold.c (fold_gimple_assign): Only fold !tcc_comparison

gcc/builtins.c

@@ -5587,12 +5587,6 @@ expand_builtin_atomic_fetch_op (machine_mode mode, tree exp, rtx target,
   return ret;
 }
 
-
-#ifndef HAVE_atomic_clear
-# define HAVE_atomic_clear 0
-# define gen_atomic_clear(x,y) (gcc_unreachable (), NULL_RTX)
-#endif
-
 /* Expand an atomic clear operation.
 	void _atomic_clear (BOOL *obj, enum memmodel)
    EXP is the call expression.  */
@@ -5615,12 +5609,6 @@ expand_builtin_atomic_clear (tree exp)
       model = MEMMODEL_SEQ_CST;
     }
 
-  if (HAVE_atomic_clear)
-    {
-      emit_insn (gen_atomic_clear (mem, model));
-      return const0_rtx;
-    }
-
   /* Try issuing an __atomic_store, and allow fallback to __sync_lock_release.
      Failing that, a store is issued by __atomic_store.  The only way this can
      fail is if the bool type is larger than a word size.  Unlikely, but