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Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
Richard Guenther wrote:
Index: typeck.c
> ===================================================================
> --- typeck.c (revision 142371)
> +++ typeck.c (working copy)
> @@ -2790,6 +2790,10 @@ get_member_function_from_ptrfunc (tree *
> vtbl = build1 (NOP_EXPR, build_pointer_type (vtbl_ptr_type_node),
> instance_ptr);
> vtbl = cp_build_indirect_ref (vtbl, NULL, tf_warning_or_error);
> + /* If the object is not dynamic the access invokes undefined
> + behavior. As it is not executed in this case silence the
> + spurious warnings it may provoke. */
> + TREE_NO_WARNING (vtbl) = 1;
>
> /* Finally, extract the function pointer from the vtable. */
> e2 = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (vtbl), vtbl,
This is fine, thanks.
--
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713
- References:
- [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads
- Re: [PATCH][C++] Fix PR38334, TBAA issues with vtbl loads