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// { dg-do compile }
// PR c++/37553
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 */
        }
    }
}
 
void f(ui32 *) { }
void f(ui32a *) { }

Line No.	Rev	Author	Line
1	693	jeremybenn	`// { dg-do compile }`
2			`// PR c++/37553`
3			`typedef unsigned int ui32;`
4			`__extension__ typedef unsigned long long int ui64;`
5
6			`typedef ui32 __attribute__ ((__may_alias__)) ui32a;`
7			`typedef ui64 __attribute__ ((__may_alias__)) ui64a;`
8
9			`union u_u32`
10			`{`
11			`ui32a v;`
12			`} __attribute__ ((__may_alias__));`
13
14			`union u_u64`
15			`{`
16			`ui64a v;`
17			`struct`
18			`{`
19			`union u_u32 lo32, hi32;`
20			`} u;`
21			`} __attribute__ ((__may_alias__));`
22
23			`void`
24			`out_long (ui64 longVal)`
25			`{`
26			`if (((union u_u64 ) &longVal).u.lo32.v < 0x10000000ul)`
27			`{`
28			`if ((ui32) (((union u_u64 ) &longVal).u.lo32.v) < 0x4000u)`
29			`{`
30			`/* do something useful */`
31			`}`
32			`}`
33			`}`
34
35			`void f(ui32 *) { }`
36			`void f(ui32a *) { }`

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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [g++.dg/] [ext/] [alias-canon2.C] - Blame information for rev 717