[Bug middle-end/55750] New: [4.8 Regression] :-( in expand_expr_addr_expr_1, at expr.c:7646

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55750

             Bug #: 55750
           Summary: [4.8 Regression] :-( in expand_expr_addr_expr_1, at
                    expr.c:7646
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: d.g.gorbachev@gmail.com


$ cat bug.c
struct S {
  unsigned m : 1;
  unsigned n : 7;
} arr[2];

void foo(unsigned i)
{
  arr[i].n++;
}
$ gcc -S bug.c
bug.c: In function 'foo':
bug.c:8:11: internal compiler error: in expand_expr_addr_expr_1, at expr.c:7646
   arr[i].n++;
           ^
0x8387af9 expand_expr_addr_expr_1
    ../../gcc-4.8/gcc/expr.c:7646
0x8387e16 expand_expr_addr_expr
    ../../gcc-4.8/gcc/expr.c:7688
0x8393de1 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**)
    ../../gcc-4.8/gcc/expr.c:10369
0x83883dc expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**)
    ../../gcc-4.8/gcc/expr.c:7848
0x837dc00 store_expr(tree_node*, rtx_def*, int, bool)
    ../../gcc-4.8/gcc/expr.c:5224
0x837cac8 expand_assignment(tree_node*, tree_node*, bool)
    ../../gcc-4.8/gcc/expr.c:5010
0x828c3eb expand_gimple_stmt_1
    ../../gcc-4.8/gcc/cfgexpand.c:2209
0x828c7ee expand_gimple_stmt
    ../../gcc-4.8/gcc/cfgexpand.c:2305
0x829337d expand_gimple_basic_block
    ../../gcc-4.8/gcc/cfgexpand.c:4084
0x8294c86 gimple_expand_cfg
    ../../gcc-4.8/gcc/cfgexpand.c:4603