From: Richard Biener <rguenther@suse.de>
Date: Thu, 9 Nov 2023 10:30:22 +0000 (+0100)
Subject: PR60276 fix for single-lane SLP
X-Git-Tag: basepoints/gcc-16~9122
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8a9b159a86081053289be0c44339623ff59717a2;p=thirdparty%2Fgcc.git

PR60276 fix for single-lane SLP

When enabling single-lane SLP and not splitting groups the fix for
PR60276 is no longer effective since it for unknown reason exempted
pure SLP.  The following removes this exemption, making
gcc.dg/vect/pr60276.c PASS even with --param vect-single-lane-slp=1

	PR tree-optimization/60276
	* tree-vect-stmts.cc (vectorizable_load): Do not exempt
	pure_slp grouped loads from the STMT_VINFO_MIN_NEG_DIST
	restriction.
---

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 21e8fe98e44..b8a71605f1b 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -9995,8 +9995,7 @@ vectorizable_load (vec_info *vinfo,
 
       /* Invalidate assumptions made by dependence analysis when vectorization
 	 on the unrolled body effectively re-orders stmts.  */
-      if (!PURE_SLP_STMT (stmt_info)
-	  && STMT_VINFO_MIN_NEG_DIST (stmt_info) != 0
+      if (STMT_VINFO_MIN_NEG_DIST (stmt_info) != 0
 	  && maybe_gt (LOOP_VINFO_VECT_FACTOR (loop_vinfo),
 		       STMT_VINFO_MIN_NEG_DIST (stmt_info)))
 	{