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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [gcc.dg/] [atomic-op-optimize.c] - Blame information for rev 689

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Line No. Rev Author Line
1 689 jeremybenn
/* Both these atomic operations should be optimized to an exchange operation.
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   Test that it at happens on x86 by making sure there are 2 xchg's and no
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   compare_exchange loop.  */
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/* { dg-require-effective-target sync_int_long } */
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/* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */
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/* { dg-final { scan-assembler-times "cmpxchg" 0 } } */
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/* { dg-final { scan-assembler-times "xchg" 2 } } */
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int x;
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int f()
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{
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  return __atomic_fetch_and (&x, 0, __ATOMIC_RELAXED);
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}
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int g()
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{
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  return __atomic_fetch_or (&x, -1, __ATOMIC_RELAXED);
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}

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