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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [pr33136-3.c] - Blame information for rev 298

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Line No. Rev Author Line
1 298 jeremybenn
/* PR tree-optimization/33136 */
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/* { dg-do run } */
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/* { dg-options "-O2" } */
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extern void abort (void);
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struct S
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{
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  void *a;
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  int b[3];
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  double *c;
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};
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static double d, e;
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static struct S s;
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static int *
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__attribute__((noinline, const))
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foo (void)
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{
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  return (int *) &s.b;
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}
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double *
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__attribute__((noinline))
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bar (double **f)
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{
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  s.c = &d;
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  *f = &e;
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  /* As nothing ever takes the address of any double * field in struct S,
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     the write to *f can't alias with the s.c field.  */
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  return s.c;
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}
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int
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__attribute__((noinline))
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baz (int *x)
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{
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  s.b[0] = 1;
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  *x = 4;
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  /* Function foo takes address of an int array field in struct S,
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     so *x can alias with the s.b field (and it does in this testcase).  */
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  return s.b[0];
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}
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int
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__attribute__((noinline))
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t (void)
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{
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  double *f = (double *) 0;
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  return 10 * (bar (&f) != &d) + baz (foo ());
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}
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int
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main (void)
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{
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  if (t () != 4)
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    abort ();
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  return 0;
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}

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