https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
Jozef Lawrynowicz changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
Martin Liška changed:
What|Removed |Added
CC||marxin at gcc dot gnu.org
--- Comment #11
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #10 from jozefl at gcc dot gnu.org ---
Author: jozefl
Date: Wed Nov 7 22:06:26 2018
New Revision: 265894
URL: https://gcc.gnu.org/viewcvs?rev=265894&root=gcc&view=rev
Log:
2018-11-07 Jozef Lawrynowicz
PR c/87691
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #9 from Jozef Lawrynowicz ---
Patch submitted: https://gcc.gnu.org/ml/gcc-patches/2018-10/msg01459.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #8 from rguenther at suse dot de ---
On Tue, 23 Oct 2018, jozef.l at mittosystems dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
>
> --- Comment #7 from Jozef Lawrynowicz ---
> (In reply to Richard Biener from
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #7 from Jozef Lawrynowicz ---
(In reply to Richard Biener from comment #6)
>
> I think it's better to, at this place, simply allow MODE_INT or
> MODE_PARTIAL_INT
> for unions. Allowing MODE_INT is what we'd fall back to anyways and
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
Richard Biener changed:
What|Removed |Added
CC||rguenth at gcc dot gnu.org
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #5 from Jozef Lawrynowicz ---
(In reply to Richard Biener from comment #4)
Thanks for the pointers.
> What happens if you make the attribute work for a MODE_INT union with a
> MODE_PARTIAL_INT first field that has MODE_SIZE of the u
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #4 from Richard Biener ---
What happens if you make the attribute work for a MODE_INT union with a
MODE_PARTIAL_INT first field that has MODE_SIZE of the union mode? Is there
a generic way to query SImode for PSImode as defined in
P
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #3 from Jozef Lawrynowicz ---
Perhaps it is sufficient to check targetm.pass_by_reference, i.e. if the
struct/union with the given mode would be passed by reference, then it is ok to
give the struct/union a mode outside the MODE_INT c
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #2 from Jozef Lawrynowicz ---
Created attachment 44880
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44880&action=edit
transparent_union.patch
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87691
--- Comment #1 from Jozef Lawrynowicz ---
The issue is that the union is considered to have size of 32 bits (the
in-memory size of __int20), so unless mode_for_size as called by
compute_record_mode (both in stor-layout.c) is explicitly told to lo
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