[Bug tree-optimization/41101] [4.4 Regression] ICE in compute_antic, at tree-ssa-pre.c:2419

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

------- Comment #26 from rguenth at gcc dot gnu dot org  2009-09-16 11:56 -------
Subject: Bug 41101

Author: rguenth
Date: Wed Sep 16 11:56:31 2009
New Revision: 151744

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151744
Log:
2009-09-16  Richard Guenther  <rguenther@suse.de>

        Backport from mainline
        2009-09-09  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/41101
        * tree-ssa-pre.c (maximal_set): Remove.
        (compute_antic_aux): Treat the maximal set as implicitly all ones.
        Defer all blocks we didn't visit at least one successor.
        (add_to_exp_gen): Do not add to the maximal set.
        (make_values_for_phi): Likewise.
        (compute_avail): Likewise.
        (init_pre): Do not allocate the maximal set.
        (execute_pre): Do not dump it.

        * gcc.c-torture/compile/pr41101.c: New testcase.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr41101.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_4-branch/gcc/tree-ssa-pre.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41101