[Bug tree-optimization/50908] [4.7 Regression] building emacs-23.3; gives msg: indent.c:1140:1: internal compiler error: in verify_dominators, at dominance.c:1041

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50908

--- Comment #3 from vries at gcc dot gnu.org 2011-10-31 09:42:11 UTC ---
Created attachment 25671
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25671
tentative patch

2011-10-31  Tom de Vries  <t...@codesourcery.com>

    PR tree-optimization/50908
    * tree-ssa-tail-merge.c (update_vuses): Now that edges are removed
    before update_vuses, test for 1 predecessor rather than two.
    (delete_block_update_dominator_info): New function, part of it factored
    out of ...
    (replace_block_by): Use delete_block_update_dominator_info.  Call
    update_vuses after deleting bb1 and updating dominator info, instead of
    before.