[Bug c++/37631] non-volatile asm passes volatile asm (-O3)

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-09-23 23:50 -------
A volatile asm is not a full barrier.
Please read http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Extended-Asm.html.

" Note that even a volatile asm instruction can be moved relative to other
code, including across jump instructions. For example, on many targets there is
a system register which can be set to control the rounding mode of floating
point operations. "

This came about with the fix for PR 17884.

*** This bug has been marked as a duplicate of 17884 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37631