[Bug c/79788] New: ICE in expand_expr_real_2, at expr.c:9557

[gerhard.steinmetz.fortran@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79788

            Bug ID: 79788
           Summary: ICE in expand_expr_real_2, at expr.c:9557
           Product: gcc
           Version: 7.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gerhard.steinmetz.fortran@t-online.de
  Target Milestone: ---

With testfile ./gcc.dg/pr38934.c :


$ gcc-7-20170226 -m32 -mmpx -fcheck-pointer-bounds -ftrapv -c pr38934.c
pr38934.c: In function 'f':
pr38934.c:14:13: warning: integer constant is so large that it is unsigned
   if (p >= -9223372036854775808LL - (signed char) g)
             ^~~~~~~~~~~~~~~~~~~~~
pr38934.c: In function 'f.chkp':
pr38934.c:14:35: internal compiler error: in expand_expr_real_2, at expr.c:9557
   if (p >= -9223372036854775808LL - (signed char) g)
            ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
0x8dccd2 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        ../../gcc/expr.c:9557
0x7b71e2 expand_gimple_stmt_1
        ../../gcc/cfgexpand.c:3676
0x7b71e2 expand_gimple_stmt
        ../../gcc/cfgexpand.c:3737
0x7b998e expand_gimple_basic_block
        ../../gcc/cfgexpand.c:5744
0x7bfa56 execute
        ../../gcc/cfgexpand.c:6357