re PR target/86557 (missed vectorization with std::vector compared to icc 18)

2018-07-18  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/86557
	* tree-vect-patterns.c (vect_recog_divmod_pattern): Also handle
	EXACT_DIV_EXPR.

From-SVN: r262854

gcc/ChangeLog

+2018-07-18  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/86557
+	* tree-vect-patterns.c (vect_recog_divmod_pattern): Also handle
+	EXACT_DIV_EXPR.
+
 2018-07-18  Ilya Leoshkevich  <iii@linux.ibm.com>
 
 	* config/s390/s390.c (s390_function_profiler): Generate CFI.

gcc/tree-vect-patterns.c

@@ -2684,6 +2684,7 @@ vect_recog_divmod_pattern (stmt_vec_info stmt_vinfo, tree *type_out)
   switch (rhs_code)
     {
     case TRUNC_DIV_EXPR:
+    case EXACT_DIV_EXPR:
     case TRUNC_MOD_EXPR:
       break;
     default:
@@ -2730,7 +2731,8 @@ vect_recog_divmod_pattern (stmt_vec_info stmt_vinfo, tree *type_out)
 
       cond = build2 (LT_EXPR, boolean_type_node, oprnd0,
 		     build_int_cst (itype, 0));
-      if (rhs_code == TRUNC_DIV_EXPR)
+      if (rhs_code == TRUNC_DIV_EXPR
+	  || rhs_code == EXACT_DIV_EXPR)
 	{
 	  tree var = vect_recog_temp_ssa_var (itype, NULL);
 	  tree shift;