[Bug target/18749] GCC fails to mark stack-popping instruction in unwind-info

["steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From steven at gcc dot gnu dot org  2004-12-21 00:21 -------
"xgcc (GCC) 4.0.0 20041220 (experimental)" produces this: 
$ ./xgcc -c -B. -O2 bug.c 
$ objdump -d bug.o 
 
bug.o:     file format elf64-x86-64 
 
Disassembly of section .text: 
 
0000000000000000 <func>: 
   0:   48 89 5c 24 e0          mov    %rbx,0xffffffffffffffe0(%rsp) 
   5:   48 89 6c 24 e8          mov    %rbp,0xffffffffffffffe8(%rsp) 
   a:   89 fb                   mov    %edi,%ebx 
   c:   4c 89 64 24 f0          mov    %r12,0xfffffffffffffff0(%rsp) 
  11:   4c 89 6c 24 f8          mov    %r13,0xfffffffffffffff8(%rsp) 
  16:   48 81 ec 28 10 00 00    sub    $0x1028,%rsp 
  1d:   85 ff                   test   %edi,%edi 
  1f:   7f 36                   jg     57 <func+0x57> 
  21:   89 d8                   mov    %ebx,%eax 
  23:   48 8b ac 24 10 10 00    mov    0x1010(%rsp),%rbp 
  2a:   00 
  2b:   4c 8b a4 24 18 10 00    mov    0x1018(%rsp),%r12 
  32:   00 
  33:   c1 e8 1f                shr    $0x1f,%eax 
  36:   4c 8b ac 24 20 10 00    mov    0x1020(%rsp),%r13 
  3d:   00 
  3e:   01 d8                   add    %ebx,%eax 
  40:   48 8b 9c 24 08 10 00    mov    0x1008(%rsp),%rbx 
  47:   00 
  48:   d1 f8                   sar    %eax 
  4a:   48 98                   cltq 
  4c:   8b 04 84                mov    (%rsp,%rax,4),%eax 
  4f:   48 81 c4 28 10 00 00    add    $0x1028,%rsp 
  56:   c3                      retq 
  57:   44 8d 6b ff             lea    0xffffffffffffffff(%rbx),%r13d 
  5b:   45 31 e4                xor    %r12d,%r12d 
  5e:   48 89 e5                mov    %rsp,%rbp 
  61:   44 89 ef                mov    %r13d,%edi 
  64:   41 ff c4                inc    %r12d 
  67:   e8 00 00 00 00          callq  6c <func+0x6c> 
  6c:   89 45 00                mov    %eax,0x0(%rbp) 
  6f:   48 83 c5 04             add    $0x4,%rbp 
  73:   44 39 e3                cmp    %r12d,%ebx 
  76:   7f e9                   jg     61 <func+0x61> 
  78:   eb a7                   jmp    21 <func+0x21> 
 
 
$ readelf -wf bug.o 
The section .eh_frame contains: 
 
00000000 00000014 00000000 CIE 
  Version:               1 
  Augmentation:          "" 
  Code alignment factor: 1 
  Data alignment factor: -8 
  Return address column: 16 
 
  DW_CFA_def_cfa: r7 ofs 8 
  DW_CFA_offset: r16 at cfa-8 
  DW_CFA_nop 
  DW_CFA_nop 
  DW_CFA_nop 
  DW_CFA_nop 
  DW_CFA_nop 
  DW_CFA_nop 
 
00000018 00000024 0000001c FDE cie=00000000 pc=00000000..0000007a 
  DW_CFA_advance_loc: 10 to 0000000a 
  DW_CFA_offset: r6 at cfa-32 
  DW_CFA_offset: r3 at cfa-40 
  DW_CFA_advance_loc: 19 to 0000001d 
  DW_CFA_def_cfa_offset: 4144 
  DW_CFA_offset: r13 at cfa-16 
  DW_CFA_offset: r12 at cfa-24 
  DW_CFA_nop 
  DW_CFA_nop 
  DW_CFA_nop 
 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|3.3.3 3.4.2                 |3.3.3 3.4.2 4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18749