[Bug middle-end/57003] gcc-4.8.0 breaks -O2 optimization with Wine(64) - links/info/bisect of commits included

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57003

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-04-23 09:51:23 UTC ---
The important question is what that
   memcpy( buffer, DIR_Windows, len * sizeof(WCHAR) );
   memcpy( buffer + len, default_syswow64W, sizeof(default_syswow64W) );
compiles to.  If it is
...
call memcpy
leal (%rax, ...), %rdi ! or similar, the important is that buffer is preserved
in return value of the previous memcpy call
...
call memcpy
Then if it doesn't work, you need to look at whatever memcpy implementation you
are calling and see whether it correctly returns the first argument it has been
passed to it in all cases.