https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80079
--- Comment #5 from ktkachov at gcc dot gnu.org ---
(In reply to Markus Trippelsdorf from comment #4)
> Or perhaps just init it in the constructor:
>
> diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c
> index 5bdb4597d615..a6fd8ede467c 100644
> --- a/gcc/gimple-ssa-store-merging.c
> +++ b/gcc/gimple-ssa-store-merging.c
> @@ -725,7 +725,7 @@ class pass_store_merging : public gimple_opt_pass
> {
> public:
> pass_store_merging (gcc::context *ctxt)
> - : gimple_opt_pass (pass_data_tree_store_merging, ctxt)
> + : gimple_opt_pass (pass_data_tree_store_merging, ctxt), m_stores_head ()
> {
> }
That would work too
