[Bug c++/37553] New: ICE in build_c_cast

["patrakov at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

This code triggers an ICE in gcc-4.3.1 on i686 when compiled with g++:

typedef unsigned int ui32;
__extension__ typedef unsigned long long int ui64;

typedef ui32 __attribute__ ((__may_alias__)) ui32a;
typedef ui64 __attribute__ ((__may_alias__)) ui64a;

union u_u32
{
  ui32a v;
} __attribute__ ((__may_alias__));

union u_u64
{
  ui64a v;
  struct
  {
    union u_u32 lo32, hi32;
  } u;
} __attribute__ ((__may_alias__));

void
out_long (ui64 longVal)
{
  if ((*(union u_u64 *) &longVal).u.lo32.v < 0x10000000ul)
    {
      if ((ui32) ((*(union u_u64 *) &longVal).u.lo32.v) < 0x4000u)
        {
          /* do something useful */
        }
    }
}

longs3.c: In function 'void out_long(ui64)':
longs3.c:24: internal compiler error: in build_c_cast, at cp/typeck.c:5631


-- 
           Summary: ICE in build_c_cast
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: patrakov at gmail dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37553