revert: ipa-icf-gimple.c (func_checker::compare_operand): Compare only empty constructors.

	Revert:
	* ipa-icf-gimple.c (func_checker::compare_operand): Compare only
	empty constructors.
	* gcc.c-torture/compile/icfmatch.c: Add testcase

From-SVN: r228875

gcc/ChangeLog

+2015-10-11  Jan Hubicka  <hubicka@ucw.cz>
+
+	Revert:
+	* ipa-icf-gimple.c (func_checker::compare_operand): Compare only
+	empty constructors.
+
 2015-10-16  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* tree.c (recompute_tree_invariant_for_addr_expr): Assert that the

gcc/ipa-icf-gimple.c

@@ -415,9 +415,20 @@ func_checker::compare_operand (tree t1, tree t2)
   switch (TREE_CODE (t1))
     {
     case CONSTRUCTOR:
-      gcc_assert (!vec_safe_length (CONSTRUCTOR_ELTS (t1))
-		  && !vec_safe_length (CONSTRUCTOR_ELTS (t2)));
-      return true;
+      {
+	unsigned length1 = vec_safe_length (CONSTRUCTOR_ELTS (t1));
+	unsigned length2 = vec_safe_length (CONSTRUCTOR_ELTS (t2));
+
+	if (length1 != length2)
+	  return return_false ();
+
+	for (unsigned i = 0; i < length1; i++)
+	  if (!compare_operand (CONSTRUCTOR_ELT (t1, i)->value,
+				CONSTRUCTOR_ELT (t2, i)->value))
+	    return return_false();
+
+	return true;
+      }
     case ARRAY_REF:
     case ARRAY_RANGE_REF:
       /* First argument is the array, second is the index.  */

gcc/testsuite/ChangeLog

+2015-10-11  Jan Hubicka  <hubicka@ucw.cz>
+
+	* gcc.c-torture/compile/icfmatch.c: Add testcase
+
 2015-10-16  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/67926

gcc/testsuite/gcc.c-torture/compile/icfmatch.c

+typedef char __attribute__ ((vector_size (4))) v4qi;
+void retv (int a,int b,int c,int d, v4qi *ret)
+{
+  v4qi v = { a, b , c, d };
+  *ret = v;
+}
+void retv2 (int a,int b,int c,int d, v4qi *ret)
+{
+  v4qi v = { a, b , c, d };
+  *ret = v;
+}