https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102633
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem is that since the patch above, we create a NOP_EXPR:
2172 if (convert_p && !error_operand_p (exp.value)
2173 && (TREE_CODE (TREE_TYPE (exp.value)) != ARRAY_TYPE))
2174 exp.value = convert (build_qualified_type (TREE_TYPE (exp.value),
TYPE_UNQUALIFIED), exp.value);
so the DECL_INITIAL is '(int) i' and not 'i' anymore. Then we don't
suppress_warning here:
711 case DECL_EXPR:
712 /* This is handled mostly by gimplify.cc, but we have to deal with
713 not warning about int x = x; as it is a GCC extension to turn off
714 this warning but only if warn_init_self is zero. */
715 if (VAR_P (DECL_EXPR_DECL (*expr_p))
716 && !DECL_EXTERNAL (DECL_EXPR_DECL (*expr_p))
717 && !TREE_STATIC (DECL_EXPR_DECL (*expr_p))
718 && (DECL_INITIAL (DECL_EXPR_DECL (*expr_p)) == DECL_EXPR_DECL
(*expr_p))
719 && !warn_init_self)
720 suppress_warning (DECL_EXPR_DECL (*expr_p), OPT_Winit_self);
because of the check on line 718.
