[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[amylaar at gcc dot gnu dot org]

------- Comment #3 from amylaar at gcc dot gnu dot org  2007-05-17 17:50 -------
(In reply to comment #2)
> Do you still have the testcase?
> 

Not as such.  However, AFAICR it was triggered by a regression test
(i.e. building library or testcase).

But the issue should be clear enough without a testcase; it's explained in a
comment of the patch.

While the current code of noce_emit_move_insn has a check for recog_memoized,
It will still emit en invalid move if the move is invalid because the
destination is a paradoxical SUBREG with TRULY_NOOP_TRUNCATION being false,
and source is a REG.


-- 

amylaar at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-05-17 17:50:53
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369