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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110044] [10/11/12/13 Regression] #pragma pack(push, 1)
 may not force packing, while __attribute__((packed, aligned(1))) works
Date: Fri, 09 Jun 2023 08:39:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110044

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Iain D Sandoe
<iains@gcc.gnu.org>:

https://gcc.gnu.org/g:8d64b55db0bec62873503739fabc2a4d3219ad58

commit r12-9688-g8d64b55db0bec62873503739fabc2a4d3219ad58
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Thu Jun 1 13:43:35 2023 +0100

    Darwin, PPC: Fix struct layout with pragma pack [PR110044].

    This bug was essentially that darwin_rs6000_special_round_type_align()
    was ignoring externally-imposed capping of field alignment.

    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

            PR target/110044

    gcc/ChangeLog:

            * config/rs6000/rs6000.cc (darwin_rs6000_special_round_type_ali=
gn):
            Make sure that we do not have a cap on field alignment before
altering
            the struct layout based on the type alignment of the first entr=
y.

    gcc/testsuite/ChangeLog:

            * gcc.target/powerpc/darwin-abi-13-0.c: New test.
            * gcc.target/powerpc/darwin-abi-13-1.c: New test.
            * gcc.target/powerpc/darwin-abi-13-2.c: New test.
            * gcc.target/powerpc/darwin-structs-0.h: New test.

    (cherry picked from commit 84d080a29a780973bef47171ba708ae2f7b4ee47)=