[Bug bootstrap/40431] New: ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[Bug bootstrap/40431] New: ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[ro at gcc dot gnu dot org]

Between 20090522 (rev 147798) and 20090612 (rev 148427), Solaris 11/SPARC
bootstrap broke configuring the stage1 sparcv9 libgcc: in config.log, I find

configure:2590: checking for suffix of object files
configure:2611: /vol/gccsrc/obj/gcc-4.5.0-20090612/11-gcc/./gcc/xgcc
-B/vol/gccsrc/obj/gcc-4.5.0-20090612/11-gcc/./gcc/
-B/vol/gcc/sparc-sun-solaris2.11/bin/ -B/vol/gcc/sparc-sun-solaris2.11/lib/
-isystem /vol/gcc/sparc-sun-solaris2.11/include -isystem
/vol/gcc/sparc-sun-solaris2.11/sys-include  -m64 -c -g -O2  conftest.c >&5
conftest.c:16:1: internal compiler error: in div_data_align, at dwarf2out.c:533

This can be reproduced with this conftest.c:

int
main ()
{

  ;
  return 0;
}

ro@galeras 49 > ./cc1 conftest.i -mptr64 -mstack-bias -mno-v8plus -mcpu=v9 -m64
-g
 main
Analyzing compilation unit
Performing interprocedural optimizations
 <visibility> <early_local_cleanups> <summary generate> <inline>Assembling
functions:
 main
conftest.c:7:1: internal compiler error: in div_data_align, at dwarf2out.c:533
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Running cc1 under gdb, I find

Breakpoint 1, fancy_abort (file=0xe07518
"/vol/gcc/src/gcc-dist/gcc/dwarf2out.c", line=533, function=0xe07b60
"div_data_align") at /vol/gcc/src/gcc-dist/gcc/diagnostic.c:730
(gdb) where
#0  fancy_abort (file=0xe07518 "/vol/gcc/src/gcc-dist/gcc/dwarf2out.c",
line=533, function=0xe07b60 "div_data_align") at
/vol/gcc/src/gcc-dist/gcc/diagnostic.c:730
#1  0x0034cedc in div_data_align (off=2047) at
/vol/gcc/src/gcc-dist/gcc/dwarf2out.c:533
#2  0x0034cb2c in output_cfi (cfi=0xff012360, fde=0x0, for_eh=0) at
/vol/gcc/src/gcc-dist/gcc/dwarf2out.c:3044
#3  0x0034df58 in output_call_frame_info (for_eh=0) at
/vol/gcc/src/gcc-dist/gcc/dwarf2out.c:3397
#4  0x0034f618 in dwarf2out_frame_finish () at
/vol/gcc/src/gcc-dist/gcc/dwarf2out.c:3740
#5  0x007d5e48 in compile_file () at /vol/gcc/src/gcc-dist/gcc/toplev.c:1071
#6  0x007d9278 in do_compile () at /vol/gcc/src/gcc-dist/gcc/toplev.c:2353
#7  0x007d939c in toplev_main (argc=8, argv=0xffbff634) at
/vol/gcc/src/gcc-dist/gcc/toplev.c:2398
#8  0x0021a63c in main (argc=8, argv=0xffbff634) at
/vol/gcc/src/gcc-dist/gcc/main.c:35
(gdb) up
#1  0x0034cedc in div_data_align (off=2047) at
/vol/gcc/src/gcc-dist/gcc/dwarf2out.c:533
(gdb) p r
$2 = -255
(gdb) p off
$3 = 2047

I suppose one of rth's recent DWARF patches is the culprit.

On the other hand, i386-pc-solaris2.10 is unaffected.


-- 
           Summary: ICE in div_data_align, at dwarf2out.c:533 while
                    configuring sparcv9 libgcc
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ro at gcc dot gnu dot org
 GCC build triplet: sparc-sun-solaris2.11
  GCC host triplet: sparc-sun-solaris2.11
GCC target triplet: sparc-sun-solaris2.11


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug bootstrap/40431] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[ro at gcc dot gnu dot org]

------- Comment #1 from ro at gcc dot gnu dot org  2009-06-22 14:08 -------
The problem persists as of 20090622 (rev 148784).  Starting a reghunt now.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug bootstrap/40431] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[ro at gcc dot gnu dot org]

------- Comment #2 from ro at gcc dot gnu dot org  2009-06-22 17:25 -------
Here's what the reghunt revealed:

* As of rev 148410, mainline ICEs building the 64-bit unwind-dw2-fde.o:

/vol/gcc/src/gcc-reghunt/libgcc/../gcc/unwind-dw2-fde.c:154:1: internal
compiler error: in dwarf2out_begin_epilogue, at dwarf2out.c:2752

  This is fixed by applying the patch from Comment #1 of PR debug/40462.  This
  way, a C-only bootstrap finishes successfully.

* If I update this tree (with the patch) to rev 148411, I still get the ICE in
  div_data_align.  Thus, this patch

2009-06-11  Richard Henderson  <rth@redhat.com>

        * dwarf2out.c (def_cfa_1): Likewise for DW_CFA_cfa_offset.

        * dwarf2out.c (need_data_align_sf_opcode): New.
        (div_data_align): Move earlier.
        (def_cfa_1, reg_save): Use it.

  is the culprit.


-- 

ro at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rth at gcc dot gnu dot org
                   |dot org                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug bootstrap/40431] [4.5 regression] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[ebotcazou at gcc dot gnu dot org]

------- Comment #3 from ebotcazou at gcc dot gnu dot org  2009-07-01 05:45 -------
Yep.


-- 

ebotcazou at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
  GCC build triplet|sparc-sun-solaris2.11       |sparc*-sun-solaris2.*
   GCC host triplet|sparc-sun-solaris2.11       |sparc*-sun-solaris2.*
 GCC target triplet|sparc-sun-solaris2.11       |sparc*-sun-solaris2.*
   Last reconfirmed|0000-00-00 00:00:00         |2009-07-01 05:45:53
               date|                            |
            Summary|ICE in div_data_align, at   |[4.5 regression] ICE in
                   |dwarf2out.c:533 while       |div_data_align, at
                   |configuring sparcv9 libgcc  |dwarf2out.c:533 while
                   |                            |configuring sparcv9 libgcc


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug bootstrap/40431] [4.5 regression] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[ebotcazou at gcc dot gnu dot org]

------- Comment #4 from ebotcazou at gcc dot gnu dot org  2009-07-01 05:46 -------
Investigating.


-- 

ebotcazou at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|rth at gcc dot gnu dot org  |ebotcazou at gcc dot gnu dot
                   |                            |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-07-01 05:45:53         |2009-07-01 05:46:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug debug/40431] [4.5 regression] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[rth at gcc dot gnu dot org]

------- Comment #5 from rth at gcc dot gnu dot org  2009-07-01 14:56 -------
You're right, it's my bug.


-- 

rth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|ebotcazou at gcc dot gnu dot|rth at gcc dot gnu dot org
                   |org                         |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug debug/40431] [4.5 regression] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[rth at gcc dot gnu dot org]

------- Comment #6 from rth at gcc dot gnu dot org  2009-07-01 23:16 -------
Subject: Bug 40431

Author: rth
Date: Wed Jul  1 23:16:06 2009
New Revision: 149157

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149157
Log:
        PR debug/40431
        * dwarf2out.c (def_cfa_1): Revert 2009-06-11 change for
        DW_CFA_def_cfa_offset and DW_CFA_def_cfa.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431

[Bug debug/40431] [4.5 regression] ICE in div_data_align, at dwarf2out.c:533 while configuring sparcv9 libgcc

[rth at gcc dot gnu dot org]

------- Comment #7 from rth at gcc dot gnu dot org  2009-07-01 23:32 -------
Fixed.


-- 

rth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40431