[Bug c/52425] New: ICE when compiling file from audacious on debian sparc

[Bug c/52425] New: ICE when compiling file from audacious on debian sparc

[plugwash at p10link dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

             Bug #: 52425
           Summary: ICE when compiling file from audacious on debian sparc
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: plugwash@p10link.net


Building
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;filename=ui_fileopener.preprocessed;att=1;bug=659793
(preprocessed output from a file that formed part of audacious) with the
following command

gcc -fPIC -DPIC -g -O2 -std=gnu99 -pipe -pthread -c -xcpp-output
ui_fileopener.preprocessed


on debian sparc sid (debian gcc version 4.6.2-15, triplet sparc-linux-gnu)
produces.

root@netra:/audacious-3.2/src/libaudgui# gcc -fPIC -DPIC -g -O2 -std=gnu99
-pipe -pthread -c -xcpp-output ui_fileopener.preprocessed
ui_fileopener.c:200:1: internal compiler error: output_operand: invalid
expression as operand
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.
{standard input}: Assembler messages:
{standard input}:6791: Warning: partial line at end of file ignored
Preprocessed source stored into /tmp/ccxHh7Af.out file, please attach this to
your bugreport.
root@netra:/audacious-3.2/src/libaudgui#

If the optimisation level is dropped to -O1 or -fPIC is removed from the
command line the file builds successfully.

gcc-4.5 (debian gcc version 4.5.3-12) does not exhibit the bug.
gcc-snapshot ((Debian 20120128-1) 4.7.0 20120128 (experimental) [trunk revision
183664]) also does not exibit the bug.

This bug is reported in debian as
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659793

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |sparc-linux-gnu
          Component|c                           |target
      Known to work|                            |4.5.3, 4.7.0
   Target Milestone|---                         |4.6.4
            Summary|ICE when compiling file     |[4.6 Regression] ICE when
                   |from audacious on debian    |compiling file from
                   |sparc                       |audacious on debian sparc
      Known to fail|                            |4.6.2

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

Mikael Pettersson <mikpe at it dot uu.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikpe at it dot uu.se

--- Comment #1 from Mikael Pettersson <mikpe at it dot uu.se> 2012-02-29 12:41:15 UTC ---
I can reproduce the ICE with a cross to sparc64-linux and -fPIC -g -O2
-std=gnu99 -pthread -S -m32 -mcpu=v8.

The ICE stopped occurring on trunk with r171154:
http://gcc.gnu.org/ml/gcc-cvs/2011-03/msg00576.html
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg01114.html

However that's merely a minor IRA cost tweak with no SPARC-specific bits, so I
suspect the problem is elsewhere.

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

Mikael Pettersson <mikpe at it dot uu.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bernds at gcc dot gnu.org

--- Comment #2 from Mikael Pettersson <mikpe at it dot uu.se> 2012-02-29 15:36:42 UTC ---
The ICE first appeared in r164552, Bernd Schmidt's first PR44373 aka head
merging patch, then disappeared when r164552 was reverted, then reappeared in
r167779 when the updated PR44374 patch was committed.  Adding Bernd to CC list.

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

--- Comment #3 from Mikael Pettersson <mikpe at it dot uu.se> 2012-02-29 19:43:38 UTC ---
Created attachment 26789
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26789
reduced test case

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

[bernds at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-03-02 14:22:54 UTC ---
For some reason I can never reproduce sparc bugs with cross compilers. The
original testcase doesn't fail here; the reduced one fails but with a different
error message, and it fails in instantiate_virtual_regs which is before any
head-merging ever runs:

sparcbug.i: In function ‘action_button_cb’:
sparcbug.i:57:1: error: unrecognizable insn:
(insn 7 6 8 3 (set (reg:SI 130)
        (lo_sum:SI (reg:SI 130)
            (unspec:SI [
                    (symbol_ref/f:DI ("*.LC0") [flags 0x2] <var_decl
0x7ffff6cd7f00 *.LC0>)
                ] 0))) sparcbug.i:49 -1
     (nil))

Breakpoint 2, internal_error (gmsgid=0xd6093d "in %s, at %s:%d") at
../../trunk/gcc/diagnostic.c:839
839    {
(gdb) bt
#0  internal_error (gmsgid=0xd6093d "in %s, at %s:%d") at
../../trunk/gcc/diagnostic.c:839
#1  0x0000000000bcf7cc in fancy_abort (file=<optimized out>, line=2123,
function=0xc99260 "extract_insn")
    at ../../trunk/gcc/diagnostic.c:899
#2  0x000000000081e8d3 in _fatal_insn (msgid=<optimized out>,
insn=0x7ffff6bc5990, 
    file=0xc9885b "../../trunk/gcc/recog.c", line=2123, function=0xc99260
"extract_insn")
    at ../../trunk/gcc/rtl-error.c:110
#3  0x000000000081e912 in _fatal_insn_not_found (insn=0xc99260, file=0xc9886b
"recog.c", line=2123, 
    function=0xa <Address 0xa out of bounds>) at
../../trunk/gcc/rtl-error.c:118
#4  0x00000000007ea2b4 in extract_insn (insn=0x7ffff6bc5990) at
../../trunk/gcc/recog.c:2123
#5  0x00000000006cfe1c in instantiate_virtual_regs_in_insn
(insn=0x7ffff6bc5990) at ../../trunk/gcc/function.c:1555
#6  instantiate_virtual_regs () at ../../trunk/gcc/function.c:1911

Please post the actual command line that gets passed to cc1. Also, it would be
helpful if you could load cc1 into a debugger and do the following at the crash
site in output_addr_const:

(gdb) p debug_rtx (x)

and at some higher level, also use debug_rtx to print out the insn it's trying
to print.

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious on debian sparc

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

--- Comment #5 from Mikael Pettersson <mikpe at it dot uu.se> 2012-03-02 16:21:37 UTC ---
Reproduced with a vanilla gcc-4.6-20120224, configured
/tmp/gcc-4.6-20120224/configure --target=sparc64-unknown-linux
--prefix=/home/mikpe/pkgs/linux-x86/cross-sparc64
--with-gmp=/home/mikpe/pkgs/linux-x86/gmp-5.0.4
--with-mpfr=/home/mikpe/pkgs/linux-x86/mpfr-3.1.0
--with-mpc=/home/mikpe/pkgs/linux-x86/mpc-0.9 --disable-libquadmath
--disable-plugin --disable-lto --disable-nls --disable-shared
--disable-libmudflap --disable-libgomp --disable-multilib
--enable-threads=posix --enable-checking=release --enable-languages=c, and
running on i686-linux.

Original test case:
> /tmp/objdir/gcc/xgcc -B/tmp/objdir/gcc -fPIC -g -O2 -std=gnu99 -pthread -S -m32 -mcpu=v8 pr52425-1.i
ui_fileopener.c:200:1: internal compiler error: output_operand: invalid
expression as operand

Reduced test case (with -v for completeness):
> /tmp/objdir/gcc/xgcc -B/tmp/objdir/gcc -v -fPIC -g -O2 -std=gnu99 -pthread -S -m32 -mcpu=v8 pr52425-2.c
Reading specs from /tmp/objdir/gcc/specs
COLLECT_GCC=/tmp/objdir/gcc/xgcc
COLLECT_LTO_WRAPPER=/tmp/objdir/gcc/lto-wrapper
Target: sparc64-unknown-linux
Configured with: /tmp/gcc-4.6-20120224/configure --target=sparc64-unknown-linux
--prefix=/home/mikpe/pkgs/linux-x86/cross-sparc64
--with-gmp=/home/mikpe/pkgs/linux-x86/gmp-5.0.4
--with-mpfr=/home/mikpe/pkgs/linux-x86/mpfr-3.1.0
--with-mpc=/home/mikpe/pkgs/linux-x86/mpc-0.9 --disable-libquadmath
--disable-plugin --disable-lto --disable-nls --disable-shared
--disable-libmudflap --disable-libgomp --disable-multilib
--enable-threads=posix --enable-checking=release --enable-languages=c
Thread model: posix
gcc version 4.6.3 20120224 (prerelease) (GCC) 
COLLECT_GCC_OPTIONS='-B' '/tmp/objdir/gcc' '-v' '-fPIC' '-g' '-O2' '-std=gnu99'
'-pthread' '-S' '-m32' '-mcpu=v8'
 /tmp/objdir/gcc/cc1 -quiet -v -imultilib . -iprefix
/tmp/objdir/gcc/../lib/gcc/sparc64-unknown-linux/4.6.3/ -isystem
/tmp/objdir/gcc/include -isystem /tmp/objdir/gcc/include-fixed -D__sparc_v8__
-D_REENTRANT pr52425-2.c -mptr32 -mno-stack-bias -mlong-double-64 -quiet
-dumpbase pr52425-2.c -m32 -mcpu=v8 -auxbase pr52425-2 -g -O2 -std=gnu99
-version -fPIC -o pr52425-2.s
GNU C (GCC) version 4.6.3 20120224 (prerelease) (sparc64-unknown-linux)
        compiled by GNU C version 4.5.4 20120223 (prerelease), GMP version
5.0.4, MPFR version 3.1.0-p4, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/sparc64-unknown-linux/4.6.3/include"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/sparc64-unknown-linux/4.6.3/include-fixed"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/sparc64-unknown-linux/4.6.3/../../../../sparc64-unknown-linux/sys-include"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/sparc64-unknown-linux/4.6.3/../../../../sparc64-unknown-linux/include"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/../../lib/gcc/sparc64-unknown-linux/4.6.3/include"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/../../lib/gcc/sparc64-unknown-linux/4.6.3/include-fixed"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/../../lib/gcc/sparc64-unknown-linux/4.6.3/../../../../sparc64-unknown-linux/sys-include"
ignoring nonexistent directory
"/tmp/objdir/gcc/../lib/gcc/../../lib/gcc/sparc64-unknown-linux/4.6.3/../../../../sparc64-unknown-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /tmp/objdir/gcc/include
 /tmp/objdir/gcc/include-fixed
End of search list.
GNU C (GCC) version 4.6.3 20120224 (prerelease) (sparc64-unknown-linux)
        compiled by GNU C version 4.5.4 20120223 (prerelease), GMP version
5.0.4, MPFR version 3.1.0-p4, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 13caed9ea010fbdbe7751ee2ff3cc0c2
pr52425-2.c:62:1: internal compiler error: output_operand: invalid expression
as operand

Running cc1 within gdb with a breakpoint on output_operand_lossage:

Breakpoint 1, output_operand_lossage (cmsgid=0x8639346 "invalid expression as
operand") at /tmp/gcc-4.6-20120224/gcc/final.c:3076
3076    {
Missing separate debuginfos, use: debuginfo-install glibc-2.13-2.i686
(gdb) bt
#0  output_operand_lossage (cmsgid=0x8639346 "invalid expression as operand")
at /tmp/gcc-4.6-20120224/gcc/final.c:3076
#1  0x081977bc in output_addr_const (file=0x88281d0, x=0xb7df98f4) at
/tmp/gcc-4.6-20120224/gcc/final.c:3634
#2  0x08133447 in dw2_asm_output_addr_rtx (size=4, addr=0xb7df98f4,
comment=0x0) at /tmp/gcc-4.6-20120224/gcc/dwarf2asm.c:282
#3  0x0813c302 in output_loc_operands (loc=0xb7d69b2c, for_eh_or_skip=<value
optimized out>) at /tmp/gcc-4.6-20120224/gcc/dwarf2out.c:5258
#4  output_loc_sequence (loc=0xb7d69b2c, for_eh_or_skip=<value optimized out>)
at /tmp/gcc-4.6-20120224/gcc/dwarf2out.c:5317
#5  0x0813c8db in output_loc_list (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:11227
#6  output_location_lists (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:10575
#7  0x0813c793 in output_location_lists (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:10577
#8  0x0813c793 in output_location_lists (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:10577
#9  0x0813c793 in output_location_lists (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:10577
#10 0x0813c793 in output_location_lists (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:10577
#11 0x0813c793 in output_location_lists (die=<value optimized out>) at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:10577
#12 0x0815a9c0 in dwarf2out_finish (filename=0xbfffef27 "pr52425-2.c") at
/tmp/gcc-4.6-20120224/gcc/dwarf2out.c:23724
#13 0x082fa7ee in compile_file (argc=31, argv=0xbfffec44) at
/tmp/gcc-4.6-20120224/gcc/toplev.c:621
#14 do_compile (argc=31, argv=0xbfffec44) at
/tmp/gcc-4.6-20120224/gcc/toplev.c:1900
#15 toplev_main (argc=31, argv=0xbfffec44) at
/tmp/gcc-4.6-20120224/gcc/toplev.c:1963
#16 0x080bdaeb in main (argc=31, argv=0xbfffec44) at
/tmp/gcc-4.6-20120224/gcc/main.c:36
(gdb) up
#1  0x081977bc in output_addr_const (file=0x88281d0, x=0xb7df98f4) at
/tmp/gcc-4.6-20120224/gcc/final.c:3634
3634          output_operand_lossage ("invalid expression as operand");
(gdb) p debug_rtx (x)
(unspec:SI [
        (symbol_ref:SI ("api_table") [flags 0x40] <var_decl 0xb7de03c0
api_table>)
    ] 0)
$1 = void

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious with -fPIC -g

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2012-03-03
                 CC|                            |ebotcazou at gcc dot
                   |                            |gnu.org
         AssignedTo|unassigned at gcc dot       |ebotcazou at gcc dot
                   |gnu.org                     |gnu.org
            Summary|[4.6 Regression] ICE when   |[4.6 Regression] ICE when
                   |compiling file from         |compiling file from
                   |audacious on debian sparc   |audacious with -fPIC -g
     Ever Confirmed|0                           |1

--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-03-03 12:05:36 UTC ---
Some bits in sparc_delegitimize_address needs to be backported.  Will fix.

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious with -fPIC -g

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-03-03 13:44:59 UTC ---
Author: ebotcazou
Date: Sat Mar  3 13:44:52 2012
New Revision: 184855

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184855
Log:
    PR target/52425
    Backport from mainline
    2011-05-22  Eric Botcazou  <ebotcazou@adacore.com>

    * config/sparc/sparc.c (sparc_delegitimize_address): Handle
    UNSPEC_MOVE_PIC pattern.

Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/config/sparc/sparc.c

[Bug target/52425] [4.6 Regression] ICE when compiling file from audacious with -fPIC -g

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52425

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
                 CC|ebotcazou at gcc dot        |
                   |gnu.org                     |
         Resolution|                            |FIXED
      Known to fail|                            |4.6.3

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-03-03 13:48:13 UTC ---
Thanks for reporting the problem.