| /* { dg-do compile } */ |
| /* { dg-require-effective-target stdint_types } */ |
| /* { dg-options "-O2" } */ |
| /* { dg-options "-O2 -mstrict-align" { target { powerpc*-*-linux* powerpc*-*-elf* } } } */ |
| |
| #include <stdint.h> |
| |
| typedef struct { |
| int64_t counter; |
| } atomic64_t; |
| |
| struct buffer_page { |
| void *a, *b; |
| atomic64_t entries; |
| }; |
| |
| static __inline__ __attribute__((always_inline)) int64_t |
| atomic64_read(const atomic64_t *v) |
| { |
| int64_t t; |
| __asm__ __volatile__("" : "=r"(t) : "m"(v->counter)); |
| return t; |
| } |
| |
| int rb_remove_pages(void *p) |
| { |
| struct buffer_page *blah = (void *)((intptr_t) p & -4); |
| return atomic64_read(&blah->entries); |
| } |
