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[Bug rtl-optimization/38722] [4.4 Regression] Revision 143027 causes ICE in find_decomposable_subregs



------- Comment #9 from steven at gcc dot gnu dot org  2009-01-04 18:45 -------
Thanks HJ for looking into this.  I think revision 143027 is not the cause,
it's more likely that it uncovers a latent bug.  I'm trying to reduce Joost's
code to a small test case.  So far, what I'm seeing is that INSN_CODE is wrong
on the insn that causes the ICE.  So some pass is not properly re-recognizing
an insn.  The ICE Joost is seeing is happening in lower_subreg2.

My test case (reduced with delta) ICEs with in IRA's record_operand_cost
because extract_insn is filling recog_data.operands with the wrong information.

I'll accept this for now, while I'm investigating.


-- 

steven at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |steven at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-01-04 15:27:13         |2009-01-04 18:45:28
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38722


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