[Bug tree-optimization/42717] [4.5 Regression] ice: verify_ssa failed

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-01-20 12:30 -------
Subject: Bug 42717

Author: rguenth
Date: Wed Jan 20 12:30:15 2010
New Revision: 156076

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156076
Log:
2010-01-20  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/42717
        * tree-ssa-dce.c (get_live_post_dom): Remove.
        (forward_edge_to_pdom): Take an arbitrary edge to copy
        degenerate PHI args from.
        (remove_dead_stmt): Use the first post-dominator even if it
        does not contain live statements as redirection destination.

        * gcc.c-torture/compile/pr42717.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr42717.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-dce.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42717