[Bug middle-end/82556] [8 Regression] internal compiler error in curr_insn_transform, at lra-constraints.c:4307

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82556

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-10-15
                 CC|                            |trippels at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
extern int foo();
typedef struct {
  char id;
  unsigned char fork_flags;
  short data_length;
} Header;
int a;
void X() {
  do {
    char* b;
    Header c;
    if (a)
      c.fork_flags |= 1;
    __builtin_memcpy(b, &c, __builtin_offsetof(Header, data_length));
    b += foo();
  } while (1);
}