From: Richard Biener <rguenther@suse.de>
Date: Tue, 5 Jan 2021 13:38:15 +0000 (+0100)
Subject: tree-optimization/98428 - avoid pre-existing vectors for loop SLP
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=26b5062be991cf709c7c628061a40a48e1bca681;p=gcc.git

tree-optimization/98428 - avoid pre-existing vectors for loop SLP

It wasn't supposed to be enabled and appearantly copying around the
checking messed up the condition.

2021-01-05  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/98428
	* tree-vect-slp.c (vect_build_slp_tree_1): Properly reject
	vector lane extracts for loop vectorization.
---

diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 2c2cf637e73..67aaa7b0a6a 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -1096,11 +1096,10 @@ vect_build_slp_tree_1 (vec_info *vinfo, unsigned char *swap,
 		   && rhs_code == BIT_FIELD_REF)
 	    {
 	      tree vec = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0);
-	      if (TREE_CODE (vec) != SSA_NAME
+	      if (!is_a <bb_vec_info> (vinfo)
+		  || TREE_CODE (vec) != SSA_NAME
 		  || !types_compatible_p (vectype, TREE_TYPE (vec)))
 		{
-		  if (is_a <bb_vec_info> (vinfo) && i != 0)
-		    continue;
 		  if (dump_enabled_p ())
 		    dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
 				     "Build SLP failed: "