[Bug debug/41340] [4.5 Regression] G++ produces different code with and without -g option

[d dot g dot gorbachev at gmail dot com]

------- Comment #5 from d dot g dot gorbachev at gmail dot com  2009-10-16 20:09 -------
There is a real difference, i.e.

- 179:  mov    0x8(%ebp),%edx
- 17c:  movzwl (%edx),%eax
+ 179:  mov    0x8(%ebp),%esi
+ 17c:  movzwl (%esi),%eax

[...]

- 1a0:  mov    %edx,(%esp)
- 1a3:  mov    %edx,-0x24(%ebp)
- 1a6:  call   1a7 <_Z8copy_rtxP7rtx_def+0x37>
- 1ab:  mov    %eax,%ecx
- 1ad:  movzbl 0x3(%eax),%eax
- 1b1:  mov    %eax,%esi
- 1b3:  and    $0xffffffdf,%eax

[...]

+ 1a0:  mov    %esi,(%esp)
+ 1a3:  call   1a4 <_Z8copy_rtxP7rtx_def+0x34>
+ 1a8:  mov    %eax,%edi
+ 1aa:  movzbl 0x3(%eax),%eax
+ 1ae:  mov    %eax,%ecx
+ 1b0:  and    $0xffffffdf,%eax
+ 1b3:  mov    %al,0x3(%edi)

etc.

-fcompare-debug produces  -fcompare-debug failure (length)


-- 

d dot g dot gorbachev at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |UNCONFIRMED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41340