[Bug middle-end/25890] New: [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[Bug middle-end/25890] New: [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[hp at gcc dot gnu dot org]

Last known to work with: "Tue Jan 17 02:44:03 UTC 2006 (revision 109801M)".
Known to fail with: "Fri Jan 20 05:17:46 UTC 2006 (revision 110008M)".
Running
/home/hp/combined/combined/gcc/testsuite/gcc.c-torture/compile/compile.exp ...
FAIL: gcc.c-torture/compile/20051228-1.c  -O1  (test for excess errors)
FAIL: gcc.c-torture/compile/20051228-1.c  -O2  (test for excess errors)
FAIL: gcc.c-torture/compile/20051228-1.c  -O3 -fomit-frame-pointer  (test for
excess errors)
FAIL: gcc.c-torture/compile/20051228-1.c  -O3 -g  (test for excess errors)
FAIL: gcc.c-torture/compile/20051228-1.c  -Os  (test for excess errors)

With the message in the .log being for all:
x/combined/gcc/testsuite/gcc.c-torture/compile/20051228-1.c: In function
'foo':^M
x/combined/gcc/testsuite/gcc.c-torture/compile/20051228-1.c:10: internal
compiler error: in expand_compound_opera\
tion, at combine.c:5644^M


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           Summary: [4.2 regression] testsuite failure: gcc.c-
                    torture/compile/20051228-1.c
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hp at gcc dot gnu dot org
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: mmix-knuth-mmixware


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
          Component|middle-end                  |rtl-optimization
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-01-21 04:15 -------
Confirmed, this also fails on x86_64-linux-gnu which means this is a semi
generic problem.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
 GCC target triplet|mmix-knuth-mmixware         |mmix-knuth-mmixware, x86_64-
                   |                            |linux-gnu
   Last reconfirmed|0000-00-00 00:00:00         |2006-01-21 04:15:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[jsm28 at gcc dot gnu dot org]

------- Comment #2 from jsm28 at gcc dot gnu dot org  2006-01-23 00:46 -------
Appeared on ia64-hp-hpux11.23 between revisions 109876 and 110062.


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jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jsm28 at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[bonzini at gnu dot org]

------- Comment #3 from bonzini at gnu dot org  2006-01-23 08:16 -------
The bug here is that expand_compound_operation uses an unsigned HOST_WIDE_INT
for pos, while the argument to the "zero_extract" rtx's is a const_int, which
is signed.  A negative value for zero_extract's position operand is at best
undefined, so it's probably easiest to make expand_compound_operation do
nothing in this case.


-- 

bonzini at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |bonzini at gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-01-21 04:15:30         |2006-01-23 08:16:23
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[bonzini at gnu dot org]

------- Comment #4 from bonzini at gnu dot org  2006-01-23 10:01 -------
*** Bug 25919 has been marked as a duplicate of this bug. ***


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bonzini at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kkojima at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[joel at gcc dot gnu dot org]

------- Comment #5 from joel at gcc dot gnu dot org  2006-01-23 20:40 -------
sh-rtems fails to build also.  Andrew thought it was related so I am adding
myself and this link to my failure post.

http://gcc.gnu.org/ml/gcc/2006-01/msg00869.html


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joel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |joel at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[hp at gcc dot gnu dot org]

------- Comment #6 from hp at gcc dot gnu dot org  2006-01-23 23:27 -------
Same for sh-elf as for st-rtems.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[bonzini at gcc dot gnu dot org]

------- Comment #7 from bonzini at gnu dot org  2006-01-24 14:29 -------
Subject: Bug 25890

Author: bonzini
Date: Tue Jan 24 14:29:25 2006
New Revision: 110170

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110170
Log:
2006-01-23  Paolo Bonzini  <bonzini@gnu.org>

        PR rtl-optimization/25890
        PR rtl-optimization/25905
        * combine.c (expand_compound_operation, expand_field_assignment):
        Fail if the bitfield's final position is out of bounds.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890

[Bug rtl-optimization/25890] [4.2 regression] testsuite failure: gcc.c-torture/compile/20051228-1.c

[bonzini at gnu dot org]

------- Comment #8 from bonzini at gnu dot org  2006-01-24 14:30 -------
Patch committed.


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bonzini at gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25890