tree-chrec.h (evolution_function_is_constant_p): Remove redundant check.

2018-04-30  Richard Biener  <rguenther@suse.de>

	* tree-chrec.h (evolution_function_is_constant_p): Remove
	redundant check.
	* tree-cfg.c (tree_node_can_be_shared): Re-order checks.

From-SVN: r259756

gcc/ChangeLog

 2018-04-30  Richard Biener  <rguenther@suse.de>
 
+	* tree-chrec.h (evolution_function_is_constant_p): Remove
+	redundant check.
+	* tree-cfg.c (tree_node_can_be_shared): Re-order checks.
+
+2018-04-30  Richard Biener  <rguenther@suse.de>
+
 	PR bootstrap/85571
 	* dwarf2out.c (gen_producer_string): Ignore -fchecking[=].
 

gcc/tree-cfg.c

@@ -5212,16 +5212,13 @@ static bool
 tree_node_can_be_shared (tree t)
 {
   if (IS_TYPE_OR_DECL_P (t)
-      || is_gimple_min_invariant (t)
       || TREE_CODE (t) == SSA_NAME
-      || t == error_mark_node
-      || TREE_CODE (t) == IDENTIFIER_NODE)
+      || TREE_CODE (t) == IDENTIFIER_NODE
+      || TREE_CODE (t) == CASE_LABEL_EXPR
+      || is_gimple_min_invariant (t))
     return true;
 
-  if (TREE_CODE (t) == CASE_LABEL_EXPR)
-    return true;
-
-  if (DECL_P (t))
+  if (t == error_mark_node)
     return true;
 
   return false;

gcc/tree-chrec.h

@@ -170,8 +170,6 @@ evolution_function_is_constant_p (const_tree chrec)
   if (chrec == NULL_TREE)
     return false;
 
-  if (CONSTANT_CLASS_P (chrec))
-    return true;
   return is_gimple_min_invariant (chrec);
 }