From: Tamar Christina <tamar.christina@arm.com>
Date: Mon, 25 Dec 2023 10:58:40 +0000 (+0000)
Subject: middle-end: explicitly initialize vec_stmts [PR113132]
X-Git-Tag: basepoints/gcc-15~3309
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fd032cce216e003d58b2394f7e61b03dee27e81a;p=thirdparty%2Fgcc.git

middle-end: explicitly initialize vec_stmts [PR113132]

when configured with --enable-checking=release we get a false
positive on the use of vec_stmts as the compiler seems unable
to notice it gets initialized through the pass-by-reference.

This explicitly initializes the local.

gcc/ChangeLog:

	PR bootstrap/113132
	* tree-vect-loop.cc (vect_create_epilog_for_reduction): Initialize vec_stmts;
---

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 88261a3a4f57..f51ae3e719e7 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -6207,7 +6207,7 @@ vect_create_epilog_for_reduction (loop_vec_info loop_vinfo,
   exit_bb = loop_exit->dest;
   exit_gsi = gsi_after_labels (exit_bb);
   reduc_inputs.create (slp_node ? vec_num : ncopies);
-  vec <gimple *> vec_stmts;
+  vec <gimple *> vec_stmts = vNULL;
   for (unsigned i = 0; i < vec_num; i++)
     {
       gimple_seq stmts = NULL;