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111
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1 /* { dg-do run { target powerpc*-*-* i?86-*-* x86_64-*-* } } */
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2 /* { dg-options "-O1" } */
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3 /* Test to make sure that inline-asm causes the tree optimizers to get the
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4 V_MAY_DEFs and clobber memory. */
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5 /* Test from Jakub Jelinek, modified by Andrew Pinski to work on all powerpc targets. */
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6 extern void abort (void);
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7
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8 unsigned short v = 0x0300;
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9
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10 void
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11 foo (unsigned short *p)
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12 {
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13 *p = v;
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14 }
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15
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16 int
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17 bar (void)
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18 {
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19 unsigned short x;
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20 volatile unsigned short *z;
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21 foo (&x);
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22 const unsigned int y = x;
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23 z = &x;
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24 #if defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) || defined (_POWER) || defined (__ppc64__) || defined (__ppc)
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25 __asm __volatile ("sthbrx %1,0,%2" : "=m" (*z) : "r" (y), "r" (z));
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26 #elif defined __i386__ || defined __x86_64__
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27 __asm __volatile ("movb %b1,1(%2)\n\tmovb %h1,(%2)"
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28 : "=m" (*z) : "Q" (y), "R" (z));
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29 #endif
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30 return (x & 1) == 0;
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31 }
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32
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33 int
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34 main (void)
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35 {
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36 if (bar ())
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37 abort ();
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38 return 0;
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39 }
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