[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[belyshev at depni dot sinp dot msu dot ru]

------- Comment #14 from belyshev at depni dot sinp dot msu dot ru  2006-02-21 12:38 -------
*** Bug 15617 has been marked as a duplicate of this bug. ***


-- 

belyshev at depni dot sinp dot msu dot ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kpfleming at
                   |                            |backtobasicsmgmt dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[belyshev at depni dot sinp dot msu dot ru]

------- Comment #15 from belyshev at depni dot sinp dot msu dot ru  2006-02-21 12:45 -------
Another testcase, use "-Os -msse", fails with all versions since 3.2:


typedef float __m128 __attribute__ ((vector_size (16)));
typedef int __m64 __attribute__ ((vector_size (8)));

int puts (const char *s);
void foo (__m128 *, __m64 *, int);

int main (void)
{
  foo (0, 0, 0);
  return 0;
}

void foo (__m128 *dst, __m64 *src, int n)
{
  __m128 xmm0 = { 0 };
  while (n > 64)
    {
      puts ("");
      xmm0 = __builtin_ia32_cvtpi2ps (xmm0, *src);
      *dst = xmm0;
      n --;
    }
}


-- 

belyshev at depni dot sinp dot msu dot ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |3.2.3 3.3.6 3.4.6 4.0.3
                   |                            |4.1.0 4.2.0
   Last reconfirmed|0000-00-00 00:00:00         |2006-02-21 12:45:28
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[belyshev at depni dot sinp dot msu dot ru]

------- Comment #16 from belyshev at depni dot sinp dot msu dot ru  2006-02-21 12:51 -------
raising severity because this bug makes "-Os" almost useless on modern x86.


-- 

belyshev at depni dot sinp dot msu dot ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |belyshev at depni dot sinp
                   |                            |dot msu dot ru
           Severity|normal                      |major


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[uros at kss-loka dot si]

------- Comment #17 from uros at kss-loka dot si  2006-02-22 10:15 -------
Works OK with gcc-4.2 and -Os -msse -fomit-frame-pointer.


-- 

uros at kss-loka dot si changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |uros at kss-loka dot si


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[roger dot larsson at norran dot net]

------- Comment #18 from roger dot larsson at norran dot net  2006-02-22 11:31 -------
(In reply to comment #16)
> raising severity because this bug makes "-Os" almost useless on modern x86.
> 
With "gcc version 4.0.2 20050901 (prerelease) (SUSE Linux)"
my testcase works but not Serge Belyshevs 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[jason at gcc dot gnu dot org]

-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jason at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-02-21 12:45:28         |2006-09-07 19:45:38
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[jason at gcc dot gnu dot org]

------- Comment #19 from jason at gcc dot gnu dot org  2006-09-07 20:24 -------
You can work around this bug with -mpreferred-stack-boundary=4


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[jason at gcc dot gnu dot org]

------- Comment #20 from jason at gcc dot gnu dot org  2006-09-08 00:28 -------
Subject: Bug 13685

Author: jason
Date: Fri Sep  8 00:28:30 2006
New Revision: 116775

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116775
Log:
        PR target/13685
        * config/i386/i386.c (override_options): Use 128-bit
        stack boundary if -msse.

Added:
    trunk/gcc/testsuite/gcc.target/i386/sse-20.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[hjl at lucon dot org]

------- Comment #21 from hjl at lucon dot org  2006-09-08 00:45 -------
*** Bug 27537 has been marked as a duplicate of this bug. ***


-- 

hjl at lucon dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |agner at agner dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[hjl at gcc dot gnu dot org]

------- Comment #22 from hjl at gcc dot gnu dot org  2006-09-11 21:34 -------
Subject: Bug 13685

Author: hjl
Date: Mon Sep 11 21:34:06 2006
New Revision: 116860

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116860
Log:
gcc/

2006-09-11  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/13685
        PR target/27537
        PR target/28621
        * config/i386/i386.c (override_options): Always default to 16
        byte stack boundary.

gcc/testsuite/

2006-09-11  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/13685
        * gcc.target/i386/pr13685.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr13685.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[hjl at gcc dot gnu dot org]

------- Comment #23 from hjl at gcc dot gnu dot org  2006-09-12 02:54 -------
Subject: Bug 13685

Author: hjl
Date: Tue Sep 12 02:54:42 2006
New Revision: 116870

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116870
Log:
gcc/

2006-09-11  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/13685
        PR target/27537
        PR target/28621
        * config/i386/i386.c (override_options): Always default to 16
        byte stack boundary.

gcc/testsuite/

2006-09-11  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/13685
        * gcc.target/i386/pr13685.c: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.target/i386/pr13685.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/config/i386/i386.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[jason at gcc dot gnu dot org]

------- Comment #24 from jason at gcc dot gnu dot org  2006-09-22 22:42 -------
This has been fixed for a while.


-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[vapier at gentoo dot org]

------- Comment #25 from vapier at gentoo dot org  2006-09-22 22:54 -------
is forcing the alignment to an even larger value really the fix ?  is there no
way to do such things on the fly ?  after all, if someone turns around and
tries to do a custom alignment on the stack that is larger than 16 bytes, that
will fail (but i guess this issue will be handled at PR28069 ?)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[agner at agner dot org]

------- Comment #26 from agner at agner dot org  2006-09-23 08:23 -------
Thank you for fixing this, but you need to tell the world which solution you
have chosen. Please see the discussion at the dublicate bug
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27537 for arguments for and against
each possible solution.

You need to specify whether the chosen solution is to enforce 16 byte stack
alignment regardless of -Os option or the solution is to make no assumption
about stack alignment when making XMM code. This is an ABI issue that has to be
standardized and made public. The makers of the Intel compiler are waiting for
a resolution to this issue so that they can make their compiler compatible with
GCC. For the same reason, assembly programmers need to know whether stack
alignment is required or not.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[vda dot linux at googlemail dot com]

------- Comment #27 from vda dot linux at googlemail dot com  2007-07-23 00:06 -------
May I point that alternative solution (to align stack _in the function which
needs it_) doesn't crash if called by code generated by old or new gcc, and
also  gives smaller, faster and less stack consuming code for all people who do
not do any SSE stuff?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685

[Bug target/13685] Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction)

[roger dot larsson at norran dot net]

------- Additional Comments From roger dot larsson at norran dot net  2005-01-07 09:49 -------
Got a query about this bug...   
   
It is still valid for gcc 3.3.4   
My computer has been upgraded to a athlon-xp, so I tested both   
   
g++ -Os -march=pentium3 matrix.cpp -o matrix   
 and   
g++ -Os -march=athlon-xp matrix.cpp -o matrix   
   
they both gives Segmentation fault when running   
./matrix   
   
Other optimization levels works.  
   
Updated summary etc.  
   

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
           Priority|P2                          |P1
            Summary|Building KDE3.2 clock applet|Building simple test
                   |with -march=pentium3 -O1    |application with -
                   |gives SIGSEGV               |march=pentium3 -Os gives
                   |                            |SIGSEGV (unaligned sse
                   |                            |instruction)
            Version|3.3.1                       |3.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685