[Bug target/39942] Nonoptimal code - leaveq; xchg %ax,%ax; retq

[hjl dot tools at gmail dot com]

------- Comment #36 from hjl dot tools at gmail dot com  2009-05-15 04:32 -------
Created an attachment (id=17871)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17871&action=view)
An updated patch

A few comments:

1. 3 branch limit is per 16byte page, not 16byte window.
2. We should allow 3 branches in a 16byte page.
3. When we have 4 branches in a 16byte page, we only need to
pad to the 16byte page boundary before the 4th branch, which
will start at the next 16byte page.


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
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  Attachment #17870|0                           |1
        is obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39942