[Bug tree-optimization/84178] [7/8 Regression] ICE in release_bb_predicate

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84178

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Mar  9 13:29:39 2018
New Revision: 258387

URL: https://gcc.gnu.org/viewcvs?rev=258387&root=gcc&view=rev
Log:
2018-03-09  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/84775
        * tree-if-conv.c (add_bb_predicate_gimplified_stmts): Delink
        immediate uses of predicate stmts and mark them modified.

        Revert
        PR tree-optimization/84178
        * tree-if-conv.c (combine_blocks): Move insert_gimplified_predicates
        to caller.
        (version_loop_for_if_conversion): Delay update_ssa call.
        (tree_if_conversion): Delay update_ssa until after predicate
        insertion.

        * gcc.dg/torture/pr84775.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr84775.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-if-conv.c