[Bug tree-optimization/34113] [4.3 Regression] ICE in get_addr_dereference_operands, at tree-ssa-operands.c:1746

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

------- Comment #4 from rguenth at gcc dot gnu dot org  2007-11-16 11:03 -------
We have wrong types in the IL before forwprop3:

  struct sockaddr_in * saddr.3;
  struct in_addr * D.1627;
  unsigned char * addr;
  unsigned char D.1580;

...

<L13>:;
  saddr.3_22 = (struct sockaddr_in *) D.1577_5;
  D.1627_23 = &saddr.3_22->sin_addr;
  addr_4 = D.1627_23;
  D.1580_9 = *addr_4;

the conversion between D.1627_23 and addr_4 is not useless.

Reduced testcase:


struct sockaddr_in { int sin_addr; };
static void ConvertAddr (struct sockaddr_in *saddr, void **addr)
{
  *addr = (void *) &saddr->sin_addr;
}
unsigned char EnableLocalHost (struct sockaddr_in *ifa_addr)
{
  unsigned char * addr;
  ConvertAddr(ifa_addr, (void **)&addr);
  return addr[0];
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34113