[Bug target/20634] code fails to compile/code generation issue with -funit-at-a-time

[Bug target/20634] code fails to compile/code generation issue with -funit-at-a-time

[belyshev at depni dot sinp.msu.ru]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20634

Serge Belyshev <belyshev at depni dot sinp.msu.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |belyshev at depni dot
                   |                            |sinp.msu.ru
      Known to work|                            |4.5.0
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.0
      Known to fail|                            |

--- Comment #6 from Serge Belyshev <belyshev at depni dot sinp.msu.ru> 2011-11-07 19:13:57 UTC ---
Fixed in gcc 4.5 by r151348:

    2009-09-02  Vladimir Makarov  <vmakarov@redhat.com>

        * doc/invoke.texi (-fsched-pressure): Document it.
        (-fsched-reg-pressure-heuristic): Remove it.
        ...

[Bug target/20634] code fails to compile/code generation issue with -funit-at-a-time

[belyshev at depni dot sinp dot msu dot ru]

------- Additional Comments From belyshev at depni dot sinp dot msu dot ru  2005-04-14 18:02 -------
reduced testcase, compile with '-O1 -fschedule-insns -funit-at-a-time',
fails with 3.3-hammer, 3.4, 4.0 and mainline, introduced in 2003:
: Search converges between 2003-07-11-trunk (#291) and 2003-07-12-trunk (#292).

------------------------------------------------------------------------------
unsigned int strlen (const char *);

static void append (char *p0, char **pp, int *j, char *p1)
{
  int k = strlen (p0);

  if (p1 && pp)
    k += strlen (p1);
  
  if (*j + k)
    while (*j);
}

int yyparse (int foo)
{
  if (foo)
    append (0, 0, 0, 0);
  else 
    append (0, 0, 0, 0);
}
------------------------------------------------------------------------------

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-04-14 18:02:56
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20634

[Bug target/20634] code fails to compile/code generation issue with -funit-at-a-time

[halcy0n at gentoo dot org]

------- Additional Comments From halcy0n at gentoo dot org  2005-03-26 21:09 -------
(In reply to comment #3)
> For the first problem with code generation issue, does -fno-strict-aliasing helps?

No, same problem still.  Only adding -fno-unit-at-a-time fixes the issue.  I
should add that it works fine with gcc 3.4 and -funit-at-a-time.

> For the second problem with respect with the ICE, well only -O1
-fschedule-insns -funit-at-a-time is 
> needed to reproduce the problem.

Yes, I get the ICE with only these options.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20634

[Bug target/20634] code fails to compile/code generation issue with -funit-at-a-time

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-03-26 18:22 -------
For the first problem with code generation issue, does -fno-strict-aliasing helps?

For the second problem with respect with the ICE, well only -O1 -fschedule-insns -funit-at-a-time is 
needed to reproduce the problem.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20634

[Bug target/20634] code fails to compile/code generation issue with -funit-at-a-time

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|rtl-optimization            |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20634