https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120958
anlauf at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2025-07-09
Known to fail| |14.3.1, 15.1.1, 16.0
--- Comment #10 from anlauf at gcc dot gnu.org ---
JTFR: I can confirm the failure with 14.3+ here at -O1 and higher.
The problem vanishes for:
- adding the ASYNCHRONOUS attribute to norm_temp2
- declaring norm_temp2 as ALLOCATABLE and allocate (norm_temp2(2))
- -fno-tree-sra
The -fno-tree-sra is really a big hammer...
The problem is not restricted to mpi_isend. Replacing the communication by
call mpi_isend( norm_temp1,
> 2,
> dp_type,
> reduce_exch_proc(i),
> i,
> mpi_comm_world,
> request,
> ierr )
call mpi_recv( norm_temp2,
> 2,
> dp_type,
> reduce_exch_proc(i),
> i,
> mpi_comm_world,
> ierr )
leads to the same observation.
