From: Richard Biener <rguenther@suse.de>
Date: Thu, 21 Oct 2021 10:10:20 +0000 (+0200)
Subject: tree-optimization/102847 - adjust VMAT_INVARIANT load costing
X-Git-Tag: basepoints/gcc-13~3709
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8516963942b0a8f06fa8f5ebd7c37f9edea151ac;p=thirdparty%2Fgcc.git

tree-optimization/102847 - adjust VMAT_INVARIANT load costing

This adds the missing scalar load cost in the prologue.

2021-10-21  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/102847
	* tree-vect-stmts.c (vect_model_load_cost): Add the scalar
	load cost in the prologue for VMAT_INVARIANT.
---

diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 8f527452bd0e..c28c9370655a 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -1194,6 +1194,9 @@ vect_model_load_cost (vec_info *vinfo,
   else if (memory_access_type == VMAT_INVARIANT)
     {
       /* Invariant loads will ideally be hoisted and splat to a vector.  */
+      prologue_cost += record_stmt_cost (cost_vec, 1,
+					 scalar_load, stmt_info, 0,
+					 vect_prologue);
       prologue_cost += record_stmt_cost (cost_vec, 1,
 					 scalar_to_vec, stmt_info, 0,
 					 vect_prologue);