[Bug target/32450] -pg seemingly causes miscompilation

[ubizjak at gmail dot com]

------- Comment #20 from ubizjak at gmail dot com  2007-07-04 20:10 -------
(In reply to comment #17)

> (the variable should be 0), but it looks like the assembly might be wrong:

> b.s:

>  (1)    cmpl    $9, __cp_log_handling_MOD_stack_pointer(%rip)
>         call    mcount
>         movq    %rdi, %rbx
>  (2)    jle     .L21

This _is_ wrong assembly. The call to mcount is clobbering flags reg between CC
setting insn (1) and CC receiving insn (2). From there, the problem becomes
trivial to track down, but I _really_ need a good sleep now.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |ubizjak at gmail dot com
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-07-04 20:10:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32450