[Bug c/77862] New: ice in add_equivalence

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77862

            Bug ID: 77862
           Summary: ice in add_equivalence
           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 39756
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39756&action=edit
gzipped C source code

The attached C code does this

$ ../results/bin/gcc -c -O2 -fPIC bug305.c
auto/auto-store.c: In function
‘store_constructor_document_attribute_image_size’:
auto/auto-store.c:29785:1: internal compiler error: Segmentation fault
0xba7bdf crash_signal
        ../../trunk/gcc/toplev.c:337
0xe17287 add_equivalence
        ../../trunk/gcc/tree-vrp.c:850
0xe21c79 extract_range_for_var_from_comparison_expr
        ../../trunk/gcc/tree-vrp.c:1608
0xe35d98 evrp_dom_walker::before_dom_children(basic_block_def*)
        ../../trunk/gcc/tree-vrp.c:10685

when compiled by gcc trunk dated 20161004 with the flags
-O2 -fPIC.