[Bug target/52372] New: gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[Bug target/52372] New: gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[ro at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

             Bug #: 52372
           Summary: gcc.target/mips/mips16-attributes{,-4}.c SEGV in
                    dwf_regno
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ro@gcc.gnu.org
                CC: rsandifo@gcc.gnu.org
              Host: mips-sgi-irix6.5
            Target: mips-sgi-irix6.5
             Build: mips-sgi-irix6.5


The mips16-attributes{, -4}.c tests ICE on IRIX 6:

FAIL: gcc.target/mips/mips16-attributes-4.c (internal compiler error)
FAIL: gcc.target/mips/mips16-attributes-4.c (test for excess errors)
FAIL: gcc.target/mips/mips16-attributes.c (internal compiler error)
FAIL: gcc.target/mips/mips16-attributes.c (test for excess errors)

In the first case, I find:

/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips16-attributes-4.c:
In function 'bar':
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.target/mips/mips16-attributes-4.c:9:1:
internal compiler error: Segmentation fault

The failure boils down to

$ cc1 -fpreprocessed mips16-attributes-4.i -quiet -mabi=o64 -mlong32 -mno-synci
-o mips16-attributes-4.s

In gdb,I see

Program received signal SIGSEGV, Segmentation fault.
0x104b4048 in dwf_regno (reg=0x40280b8) at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:912
(gdb) p reg
$1 = (const_rtx) 0x40280b8
(gdb) pr
(pc)
(gdb) where
#0  0x104b4048 in dwf_regno (reg=0x40280b8) at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:912
#1  dwarf2out_flush_queued_reg_saves () at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:994
#2  0x104b56d4 in dwarf2out_frame_debug (insn=0x40f05e0) at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:2038
#3  scan_insn_after (insn=insn@entry=0x4033048) at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:2361
#4  0x104b6b74 in scan_trace (trace=<optimized out>) at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:2505
#5  0x104b7e0c in create_cfi_notes () at
/vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:2549
#6  execute_dwarf2_frame () at /vol/gcc/src/hg/trunk/local/gcc/dwarf2cfi.c:2907
#7  0x104f5bec in execute_one_pass (pass=pass@entry=0x10dc3708) at
/vol/gcc/src/hg/trunk/local/gcc/passes.c:2081
#8  0x104f6088 in execute_pass_list (pass=0x10dc3708) at
/vol/gcc/src/hg/trunk/local/gcc/passes.c:2136
#9  0x104f60a4 in execute_pass_list (pass=0x10dc3970) at
/vol/gcc/src/hg/trunk/local/gcc/passes.c:2137
#10 0x104f60a4 in execute_pass_list (pass=0x10dc39a8) at
/vol/gcc/src/hg/trunk/local/gcc/passes.c:2137
#11 0x1078c50c in tree_rest_of_compilation (fndecl=0x40b9100) at
/vol/gcc/src/hg/trunk/local/gcc/tree-optimize.c:422
#12 0x105d533c in cgraph_expand_function (node=0x40d80a8) at
/vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:1837
#13 0x105d7564 in cgraph_output_in_order () at
/vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2002
#14 cgraph_optimize () at /vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:2213
#15 0x105d792c in cgraph_finalize_compilation_unit () at
/vol/gcc/src/hg/trunk/local/gcc/cgraphunit.c:1344
#16 0x10187cf4 in c_write_global_declarations () at
/vol/gcc/src/hg/trunk/local/gcc/c-decl.c:10031
#17 0x10277148 in compile_file () at
/vol/gcc/src/hg/trunk/local/gcc/toplev.c:573
#18 do_compile () at /vol/gcc/src/hg/trunk/local/gcc/toplev.c:1938
#19 toplev_main (argc=9, argv=0x7ffb7f04) at
/vol/gcc/src/hg/trunk/local/gcc/toplev.c:2014
#20 0x101723f0 in __start ()

I didn't easily see how to find the equivalent of REGNO(reg) in dwf_regno.

  Rainer

[Bug target/52372] [4.7 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[ro at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

Rainer Orth <ro at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.7.0
            Summary|gcc.target/mips/mips16-attr |[4.7 regression]
                   |ibutes{,-4}.c SEGV in       |gcc.target/mips/mips16-attr
                   |dwf_regno                   |ibutes{,-4}.c SEGV in
                   |                            |dwf_regno

--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> 2012-02-24 16:29:38 UTC ---
I just see that this is a regression from the 4.6 branch.

[Bug middle-end/52372] [4.7 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

rsandifo@gcc.gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2012-02-25
          Component|target                      |middle-end
         AssignedTo|unassigned at gcc dot       |rsandifo at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2012-02-25 09:40:58 UTC ---
Doesn't segfault for me, even with a cross to
mips-sgi-irix6.5, but it would probably show
as an rtl checking failure if rtl checking was
enabled.  Will try that.

Testing a patch.

[Bug middle-end/52372] [4.7 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P4

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-27 10:40:29 UTC ---
Not a primary/secondary platform.

[Bug middle-end/52372] [4.7/4.8 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2012-03-06 19:22:14 UTC ---
Author: rsandifo
Date: Tue Mar  6 19:22:10 2012
New Revision: 185013

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185013
Log:
gcc/
    PR middle-end/52372
    * rtl.h (pc_rtx, ret_rtx, simple_return_rtx, cc0_rtx): Redefine as
    variables.
    (GR_PC, GR_CC0, GR_RETURN, GR_SIMPLE_RETURN): Delete.
    * emit-rtl.c (pc_rtx, ret_rtx, simple_return_rtx, cc0_rtx): New
    variables.
    (init_emit_regs): Move associated initialization to...
    (init_emit_once): ...here.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/emit-rtl.c
    trunk/gcc/rtl.h

[Bug middle-end/52372] [4.7/4.8 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.0                       |4.7.1

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-22 08:26:57 UTC ---
GCC 4.7.0 is being released, adjusting target milestone.

[Bug middle-end/52372] [4.7/4.8 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.1                       |4.7.2

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-14 08:34:43 UTC ---
GCC 4.7.1 is being released, adjusting target milestone.

[Bug middle-end/52372] [4.7/4.8 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.2                       |4.7.3

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-09-20 10:19:33 UTC ---
GCC 4.7.2 has been released.

[Bug middle-end/52372] [4.7/4.8/4.9 regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.3                       |4.7.4

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> 2013-04-11 07:59:25 UTC ---
GCC 4.7.3 is being released, adjusting target milestone.

[Bug middle-end/52372] [4.7 Regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
            Summary|[4.7/4.8/4.9/4.10           |[4.7 Regression]
                   |regression]                 |gcc.target/mips/mips16-attr
                   |gcc.target/mips/mips16-attr |ibutes{,-4}.c SEGV in
                   |ibutes{,-4}.c SEGV in       |dwf_regno
                   |dwf_regno                   |

--- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Is this still failing for anyone?  I haven't seen any reports that the
patch didn't work and the failing target (IRIX) has since been removed.

I'll close this on the assumption that it has been fixed.  Please reopen
if I'm wrong.

[Bug middle-end/52372] [4.7 Regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[asolokha at gmx dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

--- Comment #10 from Arseny Solokha <asolokha at gmx dot com> ---
It still fails, but indeed for different targets: PR60102, PR57933. I'm not
sure whether these are actually duplicates, though.

[Bug middle-end/52372] [4.7 Regression] gcc.target/mips/mips16-attributes{,-4}.c SEGV in dwf_regno

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52372

--- Comment #11 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Arseny Solokha from comment #10)
> It still fails, but indeed for different targets: PR60102, PR57933. I'm not
> sure whether these are actually duplicates, though.

Yeah, despite dwf_regno appearing in all three backtraces, I think those
bugs are different from this one.  In this case the problem was with
SWITCHABLE_TARGET.  This bug was specifically about the failures
in the MIPS-specific mips16-attributes* tests.