[Bug middle-end/23488] [4.1/4.2 Regression] GCSE load PRE does not work with non sets

[pinskia at gcc dot gnu dot org]

------- Comment #17 from pinskia at gcc dot gnu dot org  2006-03-03 02:10 -------
(In reply to comment #5)
> It's strange that the load(*) does not get optimized, given that it's in the
> same BB as the store that precedes it... 
> 
>            movl    %eax, result.1282   
> (*)        movl    result.1282, %eax

This is because the copying of the trace is happening at the very end of the
optimization phase so it does not optimized at all.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23488