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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/105739] [10 Regression] Miscompilation of
 Linux kernel update.c
Date: Fri, 10 Jun 2022 10:56:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105739

--- Comment #10 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am testing
diff --git a/gcc/ipa-prop.cc b/gcc/ipa-prop.cc
index afd9222b5a2..c037668e7d8 100644
--- a/gcc/ipa-prop.cc
+++ b/gcc/ipa-prop.cc
@@ -1112,6 +1112,10 @@ ipa_load_from_parm_agg (struct ipa_func_body_info *f=
bi,
   if (!base)
     return false;

+  /* We can not propagate across volatile loads.  */
+  if (TREE_THIS_VOLATILE (op))
+    return false;
+
   if (DECL_P (base))
     {
       int index =3D ipa_get_param_decl_index_1 (descriptors, base);=