[Bug target/66697] Feature request: -mstackrealign and force_align_arg_pointer for x86_64

["ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66697

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2015-10-04
           See Also|                            |https://bugs.winehq.org/sho
                   |                            |w_bug.cgi?id=27680
           Assignee|unassigned at gcc dot gnu.org      |ubizjak at gmail dot com
     Ever confirmed|0                           |1

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Proposed patch at [1].

[1] https://gcc.gnu.org/ml/gcc-patches/2015-10/msg00342.html
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67758] [GCC 6 regression] ICE on invalid use of COMMON
Date: Sun, 04 Oct 2015 15:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg758

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikael at gcc dot gnu.org

--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
If I compile the test as free form before r228458, I get the following ICE

[Book15] f90/bug% gfc pr67758.f90
pr67758.f90:1:26:

       COMMON /FMCOM / X(80 000 000)
                          1
Error: Expected another dimension in array declaration at (1)
pr67758.f90:3:27:

       COMMON /FMCOM / XX(80 000 000)
                           1
Error: Expected another dimension in array declaration at (1)

Segmentation fault: 11

Internal compiler error: Error reporting routines re-entered.
gfc: internal compiler error: Abort trap: 6 (program f951)

or if configured with --enable-checking=release

[Book15] f90/bug% gfcp pr67758.f90
pr67758.f90:1:26:

       COMMON /FMCOM / X(80 000 000)
                          1
Error: Expected another dimension in array declaration at (1)
pr67758.f90:3:27:

       COMMON /FMCOM / XX(80 000 000)
                           1
Error: Expected another dimension in array declaration at (1)

(null):0: confused by earlier errors, bailing out

After r228458, I get

[Book15] f90/bug% gfc pr67758.f90
pr67758.f90:1:26:

       COMMON /FMCOM / X(80 000 000)
                          1
Error: Expected another dimension in array declaration at (1)
pr67758.f90:3:27:

       COMMON /FMCOM / XX(80 000 000)
                           1
Error: Expected another dimension in array declaration at (1)

in gfc_format_decoder, at fortran/error.c:936

Internal compiler error: Error reporting routines re-entered.

then gfortran hangs.