[gcc r15-4038] Restore aarch64 bootstrap

[Richard Biener via Gcc-cvs]

https://gcc.gnu.org/g:34670dee56a6bd030094801b3da900b1d214b454

commit r15-4038-g34670dee56a6bd030094801b3da900b1d214b454
Author: Richard Biener <rguent...@suse.de>
Date:   Thu Oct 3 13:26:21 2024 +0200

    Restore aarch64 bootstrap
    
    This zero-initializes vec_init to avoid a bogus maybe-uninitialized
    diagnostic.
    
            * tree-vect-loop.cc (vectorizable_induction): Initialize
            vec_init.

Diff:
---
 gcc/tree-vect-loop.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index f5ecf0bdb805..730888f62755 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -10278,7 +10278,7 @@ vectorizable_induction (loop_vec_info loop_vinfo,
   tree vec_def;
   edge pe = loop_preheader_edge (loop);
   basic_block new_bb;
-  tree new_vec, vec_init, vec_step, t;
+  tree new_vec, vec_init = NULL_TREE, vec_step, t;
   tree new_name;
   gimple *new_stmt;
   gphi *induction_phi;