[Bug c++/70965] New: ice in useless_type_conversion_p

["dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70965

            Bug ID: 70965
           Summary: ice in useless_type_conversion_p
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 38421
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38421&action=edit
gzipped C++ source code

The attached C++ code, when compiled by gcc trunk dated 20160504,
does this:

/home/dcb/rpmbuild/BUILD/libkolabxml-1.0.3/src/kolabformat.cpp:291:1: internal
compiler error: Segmentation fault
 }
 ^
0xe5113f crash_signal
        ../../src/trunk/gcc/toplev.c:333
0xb510c0 useless_type_conversion_p(tree_node*, tree_node*)
        ../../src/trunk/gcc/gimple-expr.c:67
0xf419d0 callsite_arguments_match_p
        ../../src/trunk/gcc/tree-sra.c:1371
0xf419d0 some_callers_have_mismatched_arguments_p
        ../../src/trunk/gcc/tree-sra.c:5063

Flag -O2 required.