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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [pr23234.c] - Blame information for rev 298

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Line No. Rev Author Line
1 298 jeremybenn
/* The problem in this PR was mostly finding a suitable place to insert
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   the reciprocals of the function arguments.  This test case tries to
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   test three possible ways of how this may go wrong.  */
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/* { dg-options "-O2 -ffast-math" } */
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/* { dg-do compile } */
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/* The original test case.  */
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double
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f1 (double a, double b, double c)
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{
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  double y0;
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  double y1;
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  if (a == 0.0)
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    {
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      y0 = -c / b;
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      return y0;
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    }
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  y0 = c / b;
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  y1 = a / b;
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  return y0 * y1;
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}
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/* Labels may end up in the middle of a block.  Also bad.  */
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double
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f2 (double a, double b, double c)
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{
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  double y0;
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  double y1;
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a_label:
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another_label:
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  if (a == 0.0)
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    {
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      y0 = -c / b;
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      return y0;
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    }
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  y0 = c / b;
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  y1 = a / b;
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  return y0 * y1;
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}
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/* Uses must still be dominated by their defs.  */
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double
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f3 (double a, double b, double c)
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{
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  double y0;
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  double y1;
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  y0 = -c / b;
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  if (a == 0.0)
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    {
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      return y0;
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    }
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  y0 = c / b;
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  y1 = a / b;
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  return y0 * y1;
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}

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