[Bug middle-end/37275] New: ICE when compile libgomp/task.c

[Bug middle-end/37275] New: ICE when compile libgomp/task.c

[linuxl4 at sohu dot com]

gcc (GCC) 4.4.0 20080828 (experimental)

gcc  -g -O2 -march=i686 -fstack-protector -c task.c -o task.o


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           Summary: ICE when compile libgomp/task.c
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: linuxl4 at sohu dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] ICE when compile libgomp/task.c

[linuxl4 at sohu dot com]

------- Comment #1 from linuxl4 at sohu dot com  2008-08-29 07:52 -------
Created an attachment (id=16160)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16160&action=view)
the preprocessed source 


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2008-09-02 20:39 -------
Can you say what the ICE is?


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
  GCC build triplet|i686-pc-linux-gnu           |
   GCC host triplet|i686-pc-linux-gnu           |
 GCC target triplet|                            |i686-pc-linux-gnu
           Keywords|                            |wrong-code
            Summary|ICE when compile            |[4.4 Regression] ICE when
                   |libgomp/task.c              |compile libgomp/task.c
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[linuxl4 at sohu dot com]

------- Comment #3 from linuxl4 at sohu dot com  2008-09-03 10:42 -------
[~/tmp]$gcc --version |head -1
gcc (GCC) 4.4.0 20080902 (experimental)

[~/tmp]$gcc -g -O2 -march=i686 -fstack-protector -c task.c -o task.o
/trunk/libgomp/task.c: In function 'GOMP_task':
/trunk/libgomp/task.c:186: internal compiler error: in mem_loc_descriptor, at
dwarf2out.c:10098
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[jakub at gcc dot gnu dot org]

------- Comment #4 from jakub at gcc dot gnu dot org  2008-09-03 22:18 -------
What happens here is that there is a variable (task) initialized from
a value within thread local aggregate (gomp_tls_data.task) and it is never
modified, and as i386 has very few registers and register preassure is high,
its pseudo is replaced by equiv mem, which happens to be:
    (mem/s/f/c:SI (plus:SI (plus:SI (unspec:SI [
                    (const_int 0 [0x0])
                ] 18)
            (reg:SI 3 bx [168]))
        (const_int 36 [0x24])) [16 gomp_tls_data.task+0 S4 A32])
(the unspec there is thread pointer).  This is then what dwarf2out sees and
fails on gcc_unreachable, because it doesn't handle that UNSPEC.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[jakub at gcc dot gnu dot org]

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jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2008-
                   |                            |09/msg00592.html
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-09-08 12:03:24
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[jsm28 at gcc dot gnu dot org]

-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2008-09-26 21:00 -------
Subject: Bug 37275

Author: jakub
Date: Fri Sep 26 20:59:03 2008
New Revision: 140712

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140712
Log:
        PR middle-end/37275
        * dwarf2out.c (tls_mem_loc_descriptor): New function.
        (mem_loc_descriptor): Use it for MEM.  For PLUS fail if second
        mem_loc_descriptor failed.  Accept UNSPEC.
        (loc_descriptor): Use tls_mem_loc_descriptor for MEM.  For PARALLEL
        fail if one of the loc_descriptor calls for pieces failed.
        (loc_descriptor_from_tree_1): Handle even DECL_EXTERNAL __thread vars,
        as long as they bind locally.  For COMPONENT_REF, ARRAY_REF etc. fail
        if loc_descriptor_from_tree_1 on offset failed.

        * gcc.target/i386/pr37275.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr37275.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275

[Bug middle-end/37275] [4.4 Regression] ICE when compile libgomp/task.c

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2008-09-26 21:03 -------
Fixed.


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jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37275