[Bug sanitizer/81224] New: ICE in -fsanitize=address w/ a register variable of a vector type

["marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81224

            Bug ID: 81224
           Summary: ICE in -fsanitize=address w/ a register variable of a
                    vector type
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: marxin at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

Starting from when -fsanitize=address was introduced, we ICE on:

$ cat ice.i
int a;
int
b ()
{
  register __attribute__ ((__vector_size__ (sizeof (int)))) int c asm("xmm0");
  return c[a];
}

$ gcc ice.i -c -fsanitize=address
during RTL pass: expand
ice.i: In function ‘b’:
ice.i:6:11: internal compiler error: in expand_expr_addr_expr_1, at expr.c:7792
   return c[a];
          ~^~~
0x859acf expand_expr_addr_expr_1
        ../../gcc/expr.c:7792
0x859418 expand_expr_addr_expr_1
        ../../gcc/expr.c:7830
0x84cb5a expand_expr_addr_expr
        ../../gcc/expr.c:7905
0x84cb5a expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        ../../gcc/expr.c:11058
0x85a2f3 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
        ../../gcc/expr.c:5554
0x85baf7 expand_assignment(tree_node*, tree_node*, bool)
        ../../gcc/expr.c:5323
0x73af78 expand_gimple_stmt_1
        ../../gcc/cfgexpand.c:3643
0x73af78 expand_gimple_stmt
        ../../gcc/cfgexpand.c:3741
0x73cfa7 expand_gimple_basic_block
        ../../gcc/cfgexpand.c:5745
0x742c86 execute
        ../../gcc/cfgexpand.c:6354

I'll take a look.