[Bug tree-optimization/82032] [8 Regression] ICE in try_switch_expansion, at tree-switch-conversion.c:2063

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82032

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Sep  5 08:12:27 2017
New Revision: 251690

URL: https://gcc.gnu.org/viewcvs?rev=251690&root=gcc&view=rev
Log:
Learn CFG cleanup to transform single case switches to gcond.

2017-09-05  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/82032
        * tree-cfg.c (generate_range_test): New function.
        * tree-cfg.h (generate_range_test): Declared here.
        * tree-cfgcleanup.c (convert_single_case_switch): New function.
        (cleanup_control_expr_graph): Use it.
        * tree-switch-conversion.c (try_switch_expansion): Remove
        assert.
        (emit_case_nodes): Use generate_range_test.
2017-09-05  Martin Liska  <mliska@suse.cz>

        PR tree-optimization/82032
        * g++.dg/other/pr82032.C: New test.
        * gcc.dg/tree-ssa/pr68198.c: Update scanned pattern.
        * gcc.dg/tree-ssa/vrp34.c: Likewise.
        * gcc.dg/switch-10.c: Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/other/pr82032.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/switch-10.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr68198.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp34.c
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-cfg.h
    trunk/gcc/tree-cfgcleanup.c
    trunk/gcc/tree-switch-conversion.c