[Bug rtl-optimization/23567] [3.4/4.0/4.1 regression] if-conversion causes wrong code

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

------- Additional Comments From jakub at gcc dot gnu dot org  2005-08-29 17:28 -------
Created an attachment (id=9615)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9615&action=view)
gcc41-pr23567.patch

Patch I have been playing with so far.	It tries harder to look for read-only
memory.  Also, the noce_try_cmove_arith looks wrong to me if write into X
may trap - noce_try_cmove_arith will write into X unconditionally and that's
what we are trying to avoid if write into X may trap.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23567

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