On Wed, 2020-01-15 at 00:53 +0100, Jakub Jelinek wrote:
> Hi!
>
> As the testcase shows, tail trimming of strncpy in tree-ssa-dse.c is fine,
> we just copy or clear fewer bytes in the destination, but unlike
> memcpy/memset etc., head trimming is problematic in certain cases.
> If we can prove tha
Hi!
As the testcase shows, tail trimming of strncpy in tree-ssa-dse.c is fine,
we just copy or clear fewer bytes in the destination, but unlike
memcpy/memset etc., head trimming is problematic in certain cases.
If we can prove that there are no zero bytes among initial head_trim bytes,
it is ok to
