re PR tree-optimization/80631 (Compiling with -O3 -mavx2 gives wrong code)

	PR tree-optimization/80631
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Compare
	induc_code against MAX_EXPR or MIN_EXPR instead of reduc_fn against
	IFN_REDUC_MAX or IFN_REDUC_MIN.

From-SVN: r255804

gcc/ChangeLog

+2017-12-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/80631
+	* tree-vect-loop.c (vect_create_epilog_for_reduction): Compare
+	induc_code against MAX_EXPR or MIN_EXPR instead of reduc_fn against
+	IFN_REDUC_MAX or IFN_REDUC_MIN.
+
 2017-12-18  Jeff Law  <law@redhat.com>
 
 	* tree-ssa-dom.c (record_equivalences_from_phis): Do not

gcc/tree-vect-loop.c

@@ -4432,9 +4432,9 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple *stmt,
 	  && (STMT_VINFO_VEC_REDUCTION_TYPE (stmt_info)
 	      == INTEGER_INDUC_COND_REDUCTION)
 	  && !integer_zerop (induc_val)
-	  && ((reduc_fn == IFN_REDUC_MAX
+	  && ((induc_code == MAX_EXPR
 	       && tree_int_cst_lt (initial_def, induc_val))
-	      || (reduc_fn == IFN_REDUC_MIN
+	      || (induc_code == MIN_EXPR
 		  && tree_int_cst_lt (induc_val, initial_def))))
 	induc_val = initial_def;
       vect_is_simple_use (initial_def, loop_vinfo, &def_stmt, &initial_def_dt);