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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/102633] [11/12/13 Regression] warning for
 self-initialization despite -Wno-init-self
Date: Tue, 26 Jul 2022 14:28:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102633

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

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

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch:

--- a/gcc/c-family/c-gimplify.cc
+++ b/gcc/c-family/c-gimplify.cc
@@ -712,13 +712,17 @@ c_gimplify_expr (tree *expr_p, gimple_seq *pre_p
ATTRIBUTE_UNUSED,
       /* This is handled mostly by gimplify.cc, but we have to deal with
     not warning about int x =3D x; as it is a GCC extension to turn off
     this warning but only if warn_init_self is zero.  */
-      if (VAR_P (DECL_EXPR_DECL (*expr_p))
-     && !DECL_EXTERNAL (DECL_EXPR_DECL (*expr_p))
-     && !TREE_STATIC (DECL_EXPR_DECL (*expr_p))
-     && (DECL_INITIAL (DECL_EXPR_DECL (*expr_p)) =3D=3D DECL_EXPR_DECL (*e=
xpr_p))
-     && !warn_init_self)
-   suppress_warning (DECL_EXPR_DECL (*expr_p), OPT_Winit_self);
-      break;
+      {
+   tree &decl =3D DECL_EXPR_DECL (*expr_p);
+   if (VAR_P (decl)
+       && !DECL_EXTERNAL (decl)
+       && !TREE_STATIC (decl)
+       && (DECL_INITIAL (decl)
+       && tree_strip_nop_conversions (DECL_INITIAL (decl)) =3D=3D decl)
+       && !warn_init_self)
+     suppress_warning (decl, OPT_Winit_self);
+   break;
+      }

     case PREINCREMENT_EXPR:
     case PREDECREMENT_EXPR:=