|
111
|
1 /* { dg-do compile } */
|
|
|
2 /* { dg-require-effective-target stdint_types } */
|
|
|
3 /* { dg-options "-O2" } */
|
|
|
4 /* { dg-options "-O2 -mstrict-align" { target { powerpc*-*-linux* powerpc*-*-elf* } } } */
|
|
|
5
|
|
|
6 #include <stdint.h>
|
|
|
7
|
|
|
8 typedef struct {
|
|
|
9 int64_t counter;
|
|
|
10 } atomic64_t;
|
|
|
11
|
|
|
12 struct buffer_page {
|
|
|
13 void *a, *b;
|
|
|
14 atomic64_t entries;
|
|
|
15 };
|
|
|
16
|
|
|
17 static __inline__ __attribute__((always_inline)) int64_t
|
|
|
18 atomic64_read(const atomic64_t *v)
|
|
|
19 {
|
|
|
20 int64_t t;
|
|
|
21 __asm__ __volatile__("" : "=r"(t) : "m"(v->counter));
|
|
|
22 return t;
|
|
|
23 }
|
|
|
24
|
|
|
25 int rb_remove_pages(void *p)
|
|
|
26 {
|
|
|
27 struct buffer_page *blah = (void *)((intptr_t) p & -4);
|
|
|
28 return atomic64_read(&blah->entries);
|
|
|
29 }
|
