Re: [gcn] Work-around libgomp 'error: array subscript 0 is outside array bounds of ‘__lds struct gomp_thread * __lds[0]’ [-Werror=array-bounds]' (was: [PATCH libatomic/arm] avoid warning on constant addresses (PR 101379))

[Jakub Jelinek via Gcc-patches]

On Mon, Jul 19, 2021 at 10:46:35AM +0200, Thomas Schwinge wrote:
> |> (So I'll consider some GCN-specific '-Wno-array-bounds' if we don't
> |> get to resolve this otherwise, soon.)
> 
> Now: "Awaiting a different solution, of course."  ;-)

The current state of the warning is unacceptable.  IMNSHO it should stop
warning for non-generic address spaces and for generic address space for
constants larger or equal to typical page size with
-fdelete-null-pointer-checks and not at all with 
-fno-delete-null-pointer-checks.

Large structures are rare and using *(type *)0x12340000 is very common
mostly in the embedded world, but with mmap MAP_FIXED also used in
non-embedded world.

We don't want all the people out there to add too many workarounds for badly
designed warning.

        Jakub