[Bug tree-optimization/65337] [5/6 Regression] bootstrap-lto gnat1 linktime ICE: gcc/ada/exp_aggr.adb:6570:0: internal compiler error: in forward_edge_to_pdom, at tree-ssa-dce.c:1086

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65337

--- Comment #13 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Dec 20 05:50:29 2015
New Revision: 231856

URL: https://gcc.gnu.org/viewcvs?rev=231856&root=gcc&view=rev
Log:
        PR middle-end/65337
        * tree-ssa-dce.c (bb_postorder): New static var.
        (forward_edge_to_pdom): Remove.
        (remove_dead_stmt): Instead of redirecting edges only keep an edge
        on a path to nearest live BB.
        (eliminate_unnecessary_stmts): Free bb_postorder.
        * cfganal.c (dfs_find_deadend): Add START_POINTES.
        * cfganal.h (inverted_post_order_compute): Update prototype.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfganal.c
    trunk/gcc/cfganal.h
    trunk/gcc/tree-ssa-dce.c