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[Bug rtl-optimization/38722] [4.4 Regression] Revision 143027 causes ICE in find_decomposable_subregs
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 Jan 2009 18:45:28 -0000
- Subject: [Bug rtl-optimization/38722] [4.4 Regression] Revision 143027 causes ICE in find_decomposable_subregs
- References: <bug-38722-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- 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