[Bug target/92904] varargs for __int128 is placed at an unaligned location and uses movdqa for the load

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92904

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 20 17:43:23 2019
New Revision: 279673

URL: https://gcc.gnu.org/viewcvs?rev=279673&root=gcc&view=rev
Log:
        Backported from mainline
        2019-12-12  Jakub Jelinek  <ja...@redhat.com>

        PR target/92904
        * config/i386/i386.c (ix86_gimplify_va_arg): If need_intregs and
        not need_temp, decrease alignment of the read because the GPR save
        area only guarantees 8-byte alignment.

        * gcc.c-torture/execute/pr92904.c: New test.

Added:
    branches/gcc-9-branch/gcc/testsuite/gcc.c-torture/execute/pr92904.c
Modified:
    branches/gcc-9-branch/gcc/ChangeLog
    branches/gcc-9-branch/gcc/config/i386/i386.c
    branches/gcc-9-branch/gcc/testsuite/ChangeLog