[Bug middle-end/110055] Dangling pointer warning inside std::vector on RISC-V

["rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110055

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The clobber is built by gimplify_target_expr and TARGET_EXPR_SLOT is changed
in place to the static variable.

Does the following fix the RISC-V issue?

diff --git a/gcc/gimplify.cc b/gcc/gimplify.cc
index ade6e335da7..aece89a3e9b 100644
--- a/gcc/gimplify.cc
+++ b/gcc/gimplify.cc
@@ -7154,8 +7154,10 @@ gimplify_target_expr (tree *expr_p, gimple_seq *pre_p,
gimple_seq *post_p)
        gimplify_and_add (init, &init_pre_p);

       /* Add a clobber for the temporary going out of scope, like
-        gimplify_bind_expr.  */
+        gimplify_bind_expr.  But only if we did not promote the
+        temporary to static storage.  */
       if (gimplify_ctxp->in_cleanup_point_expr
+         && !TREE_STATIC (temp)
          && needs_to_live_in_memory (temp))
        {
          if (flag_stack_reuse == SR_ALL)