Viewing file:  clobbers.c (1.18 KB) -rw-r--r--
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/* Test asm clobbers on x86. */
/* { dg-do run } */
extern void abort (void);
int main ()
{
int i;
__asm__ ("movl $1,%0\n\txorl %%eax,%%eax" : "=r" (i) : : "eax");
if (i != 1)
abort ();
/* On darwin you can't call external functions from non-pic code,
however, clobbering ebx isn't valid in pic code. Instead of
disabling the whole test, just disable the ebx clobbering part.
Ditto for any x86 system that is ilp32 && pic.
*/
#if !(defined (__MACH__))
#if ! defined (__PIC__) || defined (__x86_64__)
__asm__ ("movl $1,%0\n\txorl %%ebx,%%ebx" : "=r" (i) : : "ebx");
if (i != 1)
abort ();
#endif /* ! pic || lp64 */
#endif
__asm__ ("movl $1,%0\n\txorl %%ecx,%%ecx" : "=r" (i) : : "ecx");
if (i != 1)
abort ();
__asm__ ("movl $1,%0\n\txorl %%edx,%%edx" : "=r" (i) : : "edx");
if (i != 1)
abort ();
__asm__ ("movl $1,%0\n\txorl %%esi,%%esi" : "=r" (i) : : "esi");
if (i != 1)
abort ();
__asm__ ("movl $1,%0\n\txorl %%edi,%%edi" : "=r" (i) : : "edi");
if (i != 1)
abort ();
return 0;
}
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