https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96051
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Last reconfirmed| |2021-12-05
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
/* If the code both contains VLAs and calls alloca, then we cannot reclaim
the stack space allocated to the VLAs. */
And the stack restore in the case of VLA without the alloca just happens to be
after the recusive function call to no_tco_with_vla_only.
To do this optimization, we need to move the stack restore before the recusive
function call and for that we need to make sure the VLA address never escapes.
Anyways Confirmed.
