[Bug tree-optimization/34093] ICE in ssa_operand_alloc, at tree-ssa-operands.c:484

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #5 from rguenth at gcc dot gnu dot org  2008-01-02 12:37 -------
Subject: Bug 34093

Author: rguenth
Date: Wed Jan  2 12:35:38 2008
New Revision: 131257

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131257
Log:
2008-01-02  Richard Guenther  <rguenther@suse.de>

        PR middle-end/34093
        PR middle-end/31976
        * tree-ssa-operands.c (ssa_operand_alloc): Also allocate a buffer
        for very large number of operands instead of ICEing.

        * gcc.c-torture/compile/pr34093.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr34093.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-operands.c


------- Comment #6 from rguenth at gcc dot gnu dot org  2008-01-02 15:37 -------
Re-opening bug as a remainder that there's something to fix/improve with
partitioning heuristics ...


------- Comment #7 from rguenth at gcc dot gnu dot org  2008-01-02 15:41 -------
... for Diego.

Basically the partitioner somehow needs to be able to guarantee a maximum
number of virtual operands per stmt.  At the moment it tries to constrain
the _average_ number of virtual operands per stmt, where the sanity check
in tree-ssa-operands.c sets an upper bound to the number of virtual
operands per stmt.  These two do not match in degenerate cases, which triggers
the ICE.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |
            Summary|[4.3 Regression] ICE in     |ICE in ssa_operand_alloc, at
                   |ssa_operand_alloc, at tree- |tree-ssa-operands.c:484
                   |ssa-operands.c:484          |
   Target Milestone|4.3.0                       |---
         AssignedTo|rguenth at gcc dot gnu dot  |dnovillo at gcc dot gnu dot
                   |org                         |org
           Severity|blocker                     |normal
             Status|REOPENED                    |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34093