https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
Jozef Lawrynowicz changed:
What|Removed |Added
CC||jozefl.gcc at gmail dot com
--- Comm
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #2 from gnzlbg ---
> I can only speak for msp430, but there's no problem with that generated
> assembly. Structures and unions are always passed by reference.
I suppose that by this you mean that the current behavior is "by design",
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #3 from Jozef Lawrynowicz ---
(In reply to gnzlbg from comment #2)
> > I can only speak for msp430, but there's no problem with that generated
> > assembly. Structures and unions are always passed by reference.
>
> I suppose that by
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #4 from gnzlbg ---
Thanks for chiming in. I see the value in having a simple ABI rule. I guess
what confuses me is that the address passed in the calling convention for that
struct will never be used for anything or dereferenced.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #5 from Bill Schmidt ---
For 32-bit big-endian PowerPC (using the 32-bit ELF ABI), the same code
generation is provided by GCC and Clang. I.e., here's the code generation for
Clang with -O2 -m32 -mbig-endian, using 6.0.0-1ubuntu2:
i
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
Segher Boessenkool changed:
What|Removed |Added
CC||segher at gcc dot gnu.org
--- Comme
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
gnzlbg changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #8 from Segher Boessenkool ---
(In reply to gnzlbg from comment #7)
> > Note that the situation for zero-sized structs isn't very clear in
> > most ABIs, these included.
>
> This is incorrect: zero-sized types are well-defined and ef
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #9 from gnzlbg ---
> sparc is another, for example. And or1k, too.
Yeah, I was wrong. x86/x64, arm32/64, aarch64, riscv, ppc64, mips64, ... are
some of the ABIs that do not have any of these issues because they special case
"all agg
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92287
--- Comment #10 from Jozef Lawrynowicz ---
(In reply to gnzlbg from comment #9)
>
> @josef
>
> > The MSP430 ABI is here: http://www.ti.com/lit/an/slaa534/slaa534.pdf
> Although confusingly that document is wrong regarding passing structures and
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