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References: <bug-40797-11406@http.gcc.gnu.org/bugzilla/>
Subject: [Bug rtl-optimization/40797] [4.5 Regression] ICE in df_refs_verify, at df-scan.c:4361
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------- Comment #5 from kkojima at gcc dot gnu dot org  2009-07-21 22:47 -------
Binary search on 4.4 branch shows the failure was gone
after revision 145118:

2009-03-27  Xinliang David Li  <davidxl@google.com>

        PR tree-optimization/39548
        * tree-ssa-copy.c (copy_prop_visit_phi_node): Add copy 
        candidate check.

It looks the tree level change simply masks the real issue
on that branch.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40797