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[Bug tree-optimization/38745] [4.4 Regression] ICE: statement makes a memory store, but has no VDEFS
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Jan 2009 22:11:42 -0000
- Subject: [Bug tree-optimization/38745] [4.4 Regression] ICE: statement makes a memory store, but has no VDEFS
- References: <bug-38745-16726@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from pinskia at gcc dot gnu dot org 2009-01-16 22:11 -------
Semi small testcase:
union u_u16
{
unsigned short v;
struct
{
unsigned char lo8, hi8;
} __attribute__ ((__may_alias__)) u;
} __attribute__ ((__may_alias__));
union u_u32
{
unsigned int v;
struct
{
u_u16 lo16, hi16;
} u;
} __attribute__ ((__may_alias__));
union u_u64
{
struct
{
u_u32 lo32, hi32;
} u;
};
struct Record
{
};
long long
UnpackFullKey (Record & rec, const char *&p)
{
long long c64 = 0;
(*(u_u16 *) & (*(u_u32 *) & ( *(u_u64*)&c64).u.lo32.v).u.lo16.v).u.hi8 =
1;
return c64;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38745