Re: [v3][PATCH 0/2] Handle component_ref to a structure/union field including FAM for builtin_object_size

[Qing Zhao <qing.zhao@oracle.com>]

Ping…

Qing

> On Feb 10, 2023, at 7:50 PM, Qing Zhao <qing.zhao@oracle.com> wrote:
> 
> These are the 3rd version of the patches for PR101832, to fix
> builtin_object_size to correctly handle component_ref to a
> structure/union field that includes a flexible array member.
> 
> also includes a documentation update for the GCC extension on embedding
> a structure/union with flexible array member into another structure.
> which includes a fix to PR77650.
> 
> compared to the 2nd version of the patch, the major changes are:
> 1. only include C99 flexible array member to this extension, trailing [0], [1]
>   and [4] are all excluded.
> 2. for the new bit type_include_flexarray in tree_type_common, print it
>   and also stream in/out it. 
> 3. update testing cases.
> 4. more clarification on the documentation. warnings for deprecating the 
>   case when the structure with C99 FAM is embedded in the middle of
>   another structure. 
> 5. add a new warning option -Wgnu-variable-sized-type-not-at-end for
>   identifing all such cases.
> 
> bootstrapped and regression tested on aarch64 and x86.
> 
> Okay for commit?
> 
> thanks.
> 
> Qing
>