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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/102366] [10/11/12 Regression] large arrays no longer
 become static
Date: Fri, 17 Sep 2021 18:33:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102366

--- Comment #11 from anlauf at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #10)

> The problem is gone if I revert r12-3129.

But then it regresses on pr98411.  See for yourself compiling with -Wall.

Something like

diff --git a/gcc/fortran/trans-decl.c b/gcc/fortran/trans-decl.c
index bed61e2325d..b022d818e82 100644
--- a/gcc/fortran/trans-decl.c
+++ b/gcc/fortran/trans-decl.c
@@ -743,7 +743,6 @@ gfc_finish_var_decl (tree decl, gfc_symbol * sym)

   /* Keep variables larger than max-stack-var-size off stack.  */
   if (!(sym->ns->proc_name && sym->ns->proc_name->attr.recursive)
-      && !(sym->ns->proc_name && sym->ns->proc_name->attr.is_main_program)
       && !sym->attr.automatic
       && sym->attr.save !=3D SAVE_EXPLICIT
       && sym->attr.save !=3D SAVE_IMPLICIT
@@ -757,7 +756,9 @@ gfc_finish_var_decl (tree decl, gfc_symbol * sym)
          || sym->attr.allocatable)
       && !DECL_ARTIFICIAL (decl))
     {
-      if (flag_max_stack_var_size > 0)
+      if (flag_max_stack_var_size > 0
+         && !(sym->ns->proc_name &&
+              sym->ns->proc_name->attr.is_main_program))
        gfc_warning (OPT_Wsurprising,
                     "Array %qs at %L is larger than limit set by "
                     "%<-fmax-stack-var-size=3D%>, moved from stack to stat=
ic "

disables the warning for arrays in the main.=