[Tarantool-patches] [PATCH] Mark CONV as non-weak, to prevent elimination of its side-effect.

[Igor Munkin]

Max,

I've checked the patchset into all long-term branches in
tarantool/luajit and bumped a new version in master, release/2.11 and
release/2.10.

On 12.07.23, Maksim Kokryashkin via Tarantool-patches wrote:
> From: Mike Pall <mike>
> 
> An unused guarded CONV int.num cannot be omitted in general.
> 
> (cherry-picked from commit 881d02d3117838acaf4fb844332c8e33cc95c8c5)
> 
> In some cases, an unused `CONV` omission may lead to a guard
> absence, resulting in invalid control flow branching and
> undefined behavior. For a comprehensive example of
> the described situation, please refer to the comment
> in `test/tarantool-tests/mark-conv-non-weak.test.lua`.
> 
> Maxim Kokryashkin:
> * added the description and the test for the problem
> 
> Part of tarantool/tarantool#8825
> ---
>  src/lj_ir.h                                   |  2 +-
>  .../mark-conv-non-weak.test.lua               | 58 +++++++++++++++++++
>  2 files changed, 59 insertions(+), 1 deletion(-)
>  create mode 100644 test/tarantool-tests/mark-conv-non-weak.test.lua
> 

<snipped>

> -- 
> 2.39.2 (Apple Git-143)
> 

-- 
Best regards,
IM