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[Bug tree-optimization/48988] [4.7 regression] ICE at pred_chain_length_cmp at tree-ssa-uninit.c:1624
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 13 May 2011 20:58:05 +0000
- Subject: [Bug tree-optimization/48988] [4.7 regression] ICE at pred_chain_length_cmp at tree-ssa-uninit.c:1624
- Auto-submitted: auto-generated
- References: <bug-48988-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48988
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Keywords| |ice-on-valid-code
Last reconfirmed| |2011.05.13 20:51:30
Component|ada |tree-optimization
CC| |davidxl at gcc dot gnu.org,
| |ebotcazou at gcc dot
| |gnu.org
Ever Confirmed|0 |1
Summary|powerpc-rtems ICE |[4.7 regression] ICE at
|pred_chain_length_cmp at |pred_chain_length_cmp at
|tree-ssa-uninit.c:1624 |tree-ssa-uninit.c:1624
Target Milestone|--- |4.7.0
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-05-13 20:51:30 UTC ---
> What can I provide to help get this resolved?
As always, a reduced testcase. Introduced by:
2011-03-15 Xinliang David Li <davidxl@google.com>
PR c/47837
* tree-ssa-uninit.c (pred_chain_length_cmp): New function.
(normalize_preds): New function.
(is_use_properly_guarded): Normalize def predicates.
I also saw it during an LTO bootstrap with Ada enabled at some point.