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