[Bug tree-optimization/110652] [14 Regression] bootstrap failure on tree-vect-stmts.cc with --enable-checking=release: error: 'new_temp' may be used uninitialized

[linkw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110652

Kewen Lin <linkw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu.org

--- Comment #5 from Kewen Lin <linkw at gcc dot gnu.org> ---
I can reproduce this on cfarm x86 machine, the complained line is exactly the
one in comment #c4, I believe it's a false positive.

How do we work around this normally?  Just initializing new_temp with NULL_TREE
as below?

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index c08d0ef951f..124caab5c1f 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -9297,7 +9297,7 @@ vectorizable_load (vec_info *vinfo,
   class loop *containing_loop = gimple_bb (stmt_info->stmt)->loop_father;
   bool nested_in_vect_loop = false;
   tree elem_type;
-  tree new_temp;
+  tree new_temp = NULL_TREE;
   machine_mode mode;
   tree dummy;
   tree dataref_ptr = NULL_TREE;